NIKHEF Agenda

Monday 5th January (2004)Monday 5th January 

Monday 5th January


10:00NIKHEF hal/Spectrum
NIKHEF event

Nieuwjaarskoffie
Nieuwjaarskoffie




Friday 16th January (2004)Friday 16th January 

Friday 16th January


14:00N328
NIKHEF SEMINAR

The AliEn Project, Status and perspectives
Predrag Buncic
(Frankfurt)
This talk gives an overview of the AliEn, a Grid middle-ware and data analysis software developed by the ALICE collaboration to process the data that will be taken by the ALICE detector at CERN LHC. The system is built around Open Source components, uses the Web Services model and standard protocols to implement the computing platform that is currently being used to produce and analyse Monte Carlo data at over 30 sites on four continents. The distributed analysis model using is build around the ROOT system and its extension for parallel processing (PROOF). The aim of this talk is to present the current AliEn architecture and outline its future developments in the light of emerging standards and in context of other Grid projects at CERN (LCG and EGEE).
11:15H331
NIKHEF COLLOQUIUM

Physics of flavor: from CKM to MNS and back
Mario Campanelli
(Universite de Geneve)
A wide experimental program is presently under way or under development to explore in detail flavor and CP violation physics, both in the hadronic and leptonic b-factories to hadron colliders to neutrino superbeams and neutrino factories. This talk will review present open problems and experimental results the field, as well as the most promising future perspectives




Friday 23rd January (2004)Friday 23th January 

Friday 23th January


10:00SciencePark (Z011)
NIKHEF event

Grensverleggende fysica aan de UvA, Viva Fysica!
Grensverleggende fysica aan de UvA, Viva Fysica!




Tuesday 27th January (2004)Tuesday 27th January 

Tuesday 27th January


10:00H331
NIKHEF COLLOQUIUM

CP Violation -- Measuring matter-antimatter asymmetry in BaBar
Wouter Verkerke
(University of California)
The BaBar experiment at the PEP-II B-factory at SLAC started taking data in 1999 with a mission to explore CP violation in the B_d meson decays and to search for signs of new physics in such decays. BaBars (and Belles) measurements of sin2b have been the first observations of CP violation in B decays and constitute the most stringent test of the Standard Model mechanism for CP violation to date. I will review a selection of recent BaBar measurements of CP violation and will briefly discuss the future prospects of these measurements. This is an open presentation for the BAC. Note the unusual day and time!




Wednesday 28th January (2004)Wednesday 28th January 

Wednesday 28th January


09:00n.t.b.
NIKHEF event

ski-event PV
ski-event PV




Friday 30th January (2004)Friday 30th January 

Friday 30th January


11:15H331
NIKHEF COLLOQUIUM

Incorporating NLO QCD corrections into Monte Carlos
S Frixione (CANCELLED)
(INFN / Genova)
Formalisms have recently become available to incorporate NLO QCD corrections into parton shower Monte Carlos. I review the most challenging problems that needed to be solved, present practical implementations, and give a few phenomenological examples. I also briefly discuss open issues and future prospects.
16:00Spectrum
NIKHEF event

Afscheidsborrel David Bello
Afscheidsborrel David Bello
Iedereen is van harte welkom !
15:30Large lecture room of Earth Sciences (AWG), Utrecht
Utrecht University
EXTERN COLLOQUIUM AT Utrecht University

Black Holes in Elementary Particles
G t Hooft
(Utrecht University)




Tuesday 17th February (2004)Tuesday 17th February 

Tuesday 17th February


11:00H331
NIKHEF SEMINAR

Soft gluon effects for selected event shape distributions
Lorenzo Magnea
(U. of Turin)




Thursday 19th February (2004)Thursday 19th February 

Thursday 19th February


15:30H331
NIKHEF event

Stafoverleg
Stafoverleg

Agenda stafoverleg 19 Feb. 2004, H331, 15:30 hrs


Mededelingen:

- Outreach (Jacques) - NNV Lunteren - Scientific computing

Soest VI

- Discussie nav de aanstaande FOM strategie ("Soest VI") op 4 en 5 maart. Soest VI heeft belangrijke gevolgen voor de de financiering van SAF. We raden iedereen aan de bijgesloten documenten te lezen!

Wat verder ter tafel komt


Borrel (you'll need it...)





Friday 20th February (2004)Friday 20th February 

Friday 20th February


11:15Z011/H331
Landelijk Seminarium Theoretische HEF

A New Form of Matter in Heavy Ion Collisions at High Energies
Robert Pisarski
(BNL, NBI)
In the collisions of large nuclei at high energies, a transition from ordinary nuclei, to a new state of matter, might occur. This new state of matter is commonly termed a Quark-Gluon Plasma, or QGP. In this talk I review why we believe that a transition to a QGP exists, and what recent experimental results from heavy ion collisions, at both CERN and BNL, tell us. The theme of my talk is how experiments have consistently confounded naive theoretical expectation. In thermal equilibrium, the transition to a QGP can be analyzed by numerical simulations on the lattice. I discuss why simulations indicate that a strongly first order transition does not occur, and other unexpected features. Present experiments indicate strong differences between collisions at lower energies, as occur at CERN, and higher energies, as at BNL. Most notably, the spectra of particles with "hard" momenta is a clear diagnostic tool. At BNL, jets are "eaten" in the collisions of heavy ions. Analysis of correlations between identical particles suggest that the particles observed are created under explosive conditions, as a type of blast wave.




Friday 27th February (2004)Friday 27th February 

Friday 27th February


11:15H331
NIKHEF COLLOQUIUM

Evidence for pentaquarks
K Griffioen and T Bauer
(NIKHEF)
The first positive evidence for the long sought-after pentaquarks appeared this past summer, followed shortly thereafter by several confirming reports of this new Theta+ state of mass 1540 MeV, consisting of 2 up quarks, 2 down quarks and an anti-strange quark. Simultaneously, reports began to surface of experiments that had looked for the Theta+ and failed, as well as of a sighting of the predicted Xi-- pentaquark, which is yet to be verified by another experiment. The wavefunction of the particle-physics community at this moment is a superposition of acceptance, befuddlement, caution, disbelief, and excitement. We will discuss the experimental case for and against the pentaquark with an eye on predicting how this wavefunction will collapse. This special colloquium contains two presentations. Keith Griffioen will present arguments in favor of the pentaquark whereas Thomas Bauer will discuss inconsistencies.




Friday 5th March (2004)Friday 5th March 

Friday 5th March


11:15H331
NIKHEF COLLOQUIUM

Jet quenching at RHIC
Urs Wiedemann




Friday 12th March (2004)Friday 12th March 

Friday 12th March


11:15H331
NIKHEF COLLOQUIUM

LHC physics: the first year(s) ...
Fabiola Gianotti
(CERN)
The CERN Large Hadron Collider (LHC) will start operation in less than four years. After a short overview of the machine and detectors construction status, I will discuss the physics potential of the ATLAS and CMS experiments during the first 1-2 years of data taking. I will show that exciting discoveries are within reach after a few months of data taking, but emphasize the numerous experimental challenges at the beginning of the operation, and the steps needed to understand the detector response and the physics. I will also compare the Tevatron and the LHC colliders for some physics issues.




Friday 19th March (2004)Friday 19th March 

Friday 19th March


11:15H331
NIKHEF COLLOQUIUM

Incorporating NLO QCD corrections into Monte Carlos
S Frixione
(INFN / Genova)
Formalisms have recently become available to incorporate NLO QCD corrections into parton shower Monte Carlos. I review the most challenging problems that needed to be solved, present practical implementations, and give a few phenomenological examples. I also briefly discuss open issues and future prospects.




Friday 26th March (2004)Friday 26th March 

Friday 26th March


11:15Z011/H331
Landelijk Seminarium Theoretische HEF

Loop quantum gravity
Carlo Rovelli
(Marseiile)
The description of the quantum properties of spacetime is one of the major open challenges in fundamental physics. Loop Quantum Gravity is a tentative theory of quantum spacetime, based on a background-independent quantization of general relativity. The theory, developed during the last 15 years, offers today a well-defined mathematical framework and an intriguing physical picture of quantized spacetime at the Planck scale. The theory yields precise quantitative predictions, is applied to problems such as black hole entropy and the Big Bang singularity, and efforts have begun to test it with astrophysical observations. In the conference, I will describe the main ideas and the main results of the theory, and emphasize the relation with other tentative quantum gravity theories such as string theory, and its difference from conventional (background-dependent) quantum field theory.




Friday 2nd April (2004)Friday 2th April 

Friday 2th April


11:15Z011
NIKHEF COLLOQUIUM

Probing the Higgs self-coupling with hadron colliders
David Rainwater
(DESY)
I describe the exciting possibility that LHC can go beyond simple discovery of a Higgs boson to measure many of its properties, including the self-coupling, which provides proof of spontaneous symmetry breaking. The Standard Model case is given first, followed by that of the MSSM. I also outline follow-up studies needed to more thoroughly explore electroweak symmetry breaking. Note the unusual place: Z011 !!
15:30UU
Utrecht
EXTERN COLLOQUIUM AT Utrecht

Aligning soft matter in magnetic fields
Y. Levine
(UU)




Thursday 8th April (2004)Thursday 8th April 

Thursday 8th April


12:00Spectrum
NIKHEF event

Paaslunch
Paaslunch
Alle PV leden zijn van harte welkom !




Friday 16th April (2004)Friday 16th April 

Friday 16th April


11:15H331
NIKHEF SEMINAR

Astrophysical Jets: Launching jets from accretion disks
Dr. R. Keppens
(FOM instituut voor Plasma-Fysica Rijnhuizen)
Astrophysical jets are quite common phenomena across our visible universe. Strongly collimated, high-speed flows several light years long are faithful companions to young, forming stars. Jets up to a million light year long are associated with Active Galactic Nuclei, containing a supermassive black hole. Although the jet size and the velocity of the jet material greatly vary, common physical mechanisms are at work in all jets, stellar and galactic, flowing at classical up to relativistic speeds. Most, if not all, astrophysical objects from which jets originate are surrounded by accretion disks. Furthermore, observational evidence is mounting for a prominent role of magnetic fields in all astrophysical jets. The presence of a structured global magnetic field configuration in accretion disk-jet systems is believed to be important in all aspects of the astrophysical jet phenomenon: it plays a role in realizing a magneto-centrifugal jet launching, provides a natural way for jet collimation by magnetic tension, and modifies the jet linear and nonlinear stability properties against perturbations. A suitable model for the macroscopic behavior of accretion disk-jet systems is provided by the equations of MagnetoHydroDynamics. We present magnetohydrodynamic simulations of a resistive accretion disk continuously launching transmagnetosonic, collimated jets. Our calculations demonstrate that a jet is self-consistently produced by the interaction of an accretion disk with an open, initially bent large-scale magnetic field. We illustrate the complete dynamics of the ``hot'' stationary outflow (where thermal pressure balances magnetic pressure) by showing force balance, energy budget and current circuits. These magnetized accretion-ejection structures can account for under-luminous thin disks supporting bright fast collimated jets as seen in many astrophysical systems displaying jets (for instance M87).




Thursday 22nd April (2004)Thursday 22th April 

Thursday 22th April


15:30Spectrum
NIKHEF event

afscheid Yan Lefevere
afscheid Yan Lefevere
Iedereen is van harte welkom !




Monday 26th April (2004)Monday 26th April 

Monday 26th April


11:15Z011
NIKHEF event

Astro-Particle Physics Symposium
Astro-Particle Physics Symposium
At this symposium the prospects for astroparticle physics research in the Netherlands are discussed. Subjects addressed include neutrino telescopes, low-frequency radio telescopes, cosmic ray physics, computing and theory. The workshop will bring together particle physicists and astrophysicists interested in exploring the common research opportunities offered by new astroparticle-physics facilities in Europe in the nearby future. The program starts at 10.00 am in room Z011 with coffee. Speakers include J. Kuijpers (KUN), M. de Jong (NIKHEF), H. Falcke (ASTRON), R. Wijers (UvA), and H. Butcher (ASTRON). The meeting will be concluded with an open panel discussion.




Friday 7th May (2004)Friday 7th May 

Friday 7th May


11:15H331
NIKHEF COLLOQUIUM

The LOFAR project
Rob Fender
(A Pannekoek Instituut Amsterdam)
In this talk I will briefly describe the history, current funding + politics (to a certain level!) and key science drivers of the LOFAR project. I will then review results to date from the LOFAR test stations. Note that the talk will start at 11:15 am sharp with a 10-min movie; the "regular" colloquium will start at 11:25. The movie van be found here




Friday 14th May (2004)Friday 14th May 

Friday 14th May


09:00Twente Universiteit
NIKHEF event

NNV voorjaarsvergadering
NNV voorjaarsvergadering




Wednesday 19th May (2004)Wednesday 19th May 

Wednesday 19th May


11:00Z009
NIKHEF event

FOM Mechanica Netwerkdag 2004
FOM Mechanica Netwerkdag 2004
Lezingen in de Eulerzaal (Z009), lunch en borrel in de Newtonzaal (Z010) en demo-markt bij NIKHEF lokale organisatie Rob Klopping (NIKHEF) registratie, per e-mail naar secr@amolf.nl




Friday 28th May (2004)Friday 28th May 

Friday 28th May


11:15Z011/H331
Landelijk Seminarium Theoretische HEF

QCD prerequisites for collider physics
Andreas Vogt
(NIKHEF)
For the next decade, the high-energy frontier of particle physics will be at colliders with proton beams, especially the LHC. At such machines, quantitative studies of the standard model and of (un-)expected new particles require a precise understanding of the partonic luminosities and of the QCD corrections to the corresponding cross sections. For many important processes, like Higgs production, the second-order QCD effects need to be taken into account. Very recently, a milestone has been reached: the computation of the corresponding three-loop splitting functions governing the evolution of the parton distributions. We discuss why this huge and difficult calculation was necessary, what it took to complete it, and where it leads to.
15:30Utrecht
UU Natuur- en Sterrenkunde
EXTERN COLLOQUIUM AT UU Natuur- en Sterrenkunde

Nonlinear Processes in Glacier Dynamics
J. Oerlemans




Friday 4th June (2004)Friday 4th June 

Friday 4th June


10:00NIKHEF, Amsterdam
NIKHEF event

FOM Sportdag
FOM Sportdag




Friday 11th June (2004)Friday 11th June 

Friday 11th June


11:15H331
NIKHEF COLLOQUIUM

From pions to proton decay: tales of the unexpected
Don Perkins
(Oxford)
Audio-recordings of this colloquium are available. Follow the link or look in the directory /www/pub/agenda/Transparencies/, where you will find the mp3 files.




Wednesday 16th June (2004)Wednesday 16th June 

Wednesday 16th June


12:00n.t.b.
NIKHEF event

Haringlunch
Haringlunch
Alle PV leden zijn van harte welkom !




Friday 18th June (2004)Friday 18th June 

Friday 18th June


11:15H331
NIKHEF COLLOQUIUM

How did Einstein get the Nobel Prize?
Cecilia Jarlskog
(Lund)
I intend to talk about the following points:
1. Alfred Nobel and his Prizes
2. The procedures followed in selecting the laureates
3. Brief discussion of a few cases
4. A more detailed discussion of the Prize to Einstein
5. Future prospects
15:30Utrecht
UU Natuur- en Sterrenkunde
EXTERN COLLOQUIUM AT UU Natuur- en Sterrenkunde

t.b.a.
D. Dieks




Friday 9th July (2004)Friday 9th July 

Friday 9th July


14:00H331
NIKHEF SEMINAR

Loop calculations in the Standard Model with GiNaC
Christian Bauer
(Mainz)
The aim of the "xloops" project is the development of a program for the automatic calculation of arbitrary processes on the one- and two-loop level in the Standard Model and related theories. Due to inherent problems with the computer algebra system Maple in which xloops was originally implemented, the program has been rewritten using GiNaC, an extensible C++ library for symbolic computation. In this talk, I will give an overview of the history of xloops and the reasons that led to the development of GiNaC, discuss the calculation methods which are used, and present the current state of the project.




Monday 12th July (2004)Monday 12th July 

Monday 12th July


10:00koffiehoek
NIKHEF event

de laatste laag van de laatste productiekamer BOL96 wordt gelijmd
de laatste laag van de laatste productiekamer BOL96 wordt gelijmd
Daarom echte Limburgse vlaai om 10.00 uur Iedereen is van harte welkom




Friday 16th July (2004)Friday 16th July 

Friday 16th July


11:15Z011
NIKHEF COLLOQUIUM

Cosmic Jets: A Universal Phenomenon
Dave L. Meier
(Jet Propulsion Laboratory California Institute of Technology)
Cosmic jets are ubiquitous throughout the universe. They appear to be produced whenever there is accretion, shrinkage, or collapse of plasma in a gravitational field. Their purpose seems to be to dynamically expel (through magnetic processes) excess spin that builds up in the collapse. The basic principles of magnetohydrodynamic jet acceleration and collimation are now well known. And, for some types of stellar objects, we now even have good models for how these conditions are set up. This is not yet true for accreting black hole systems, however. Unlike stars, black holes cannot support currents that generate long-lived magnetic fields: those currents somehow must occur in the accretion flow itself. In this talk I will review some basic features of cosmic jets and the present MHD model for how they are produced. I then will discuss some observations of black hole systems that give clues as to how they produce steady jet outflows and how they relate to recent theoretical models. Finally, I will present some recent 3-D numerical simulations of strongly-magnetized ("Poynting-flux-dominated") jets and show how observations of jets in the cores of active galactic nuclei support the MHD acceleration model. At 11:00 hrs coffee will be served just in front of Z011.




Friday 23rd July (2004)Friday 23th July 

Friday 23th July


13:30H331
NIKHEF SEMINAR

Afstudeer voordracht Cosmic muon reconstruction in the ATLAS muon spectrometer
Maaike Limper
(UvA / NIKHEF)
During commissioning of ATLAS, it will be possible to study cosmic muons passing through the detector. For this purpose a new software package has been developed that uses pattern recognition and track reconstruction algorithms that do not assume the tracks to originate from the interaction region of the detector. The new software package has been tested with simulated events and the results will be compared with the original Monte Carlo input of the simulation.




Thursday 19th August (2004)Thursday 19th August 

Thursday 19th August


14:00H331
NIKHEF SEMINAR

CP asymmetries in charmless B decays
Wouter Hulsbergen
The fact that Wouter is visiting the Netherlands was a good excuse to ask him to present some of the latest results in charmless B decays. This informal seminar will include the recent BaBar observation of a so-called direct CP asymmetry in B->Kpi (which was deemed worthy of a press release, see: http://www.slac.stanford.edu/slac/media-info/20040802), and the measurement of the time dependent CP asymmetry in B->KS pi0. This decay is of the same 'family' of decays as B->phi KS where the leading contribution is from a loop diagram, and hence could get relatively large contributions from new physics. The experimental difficulty in B->KS pi0 (besides its small branching ratio) is the reconstruction of the B decay vertex, and I am sure Wouter will be happy to discuss all the technicalities involved if asked...




Wednesday 1st September (2004)Wednesday 1th September 

Wednesday 1th September


11:15H331
NIKHEF COLLOQUIUM

Higgs production in association with heavy quarks
Prof Lynne Orr
(Rochester University)
Note this colloquium takes place on Wednesday.




Friday 10th September (2004)Friday 10th September 

Friday 10th September


11:15H331
NIKHEF COLLOQUIUM

Recent results from D0
Paul de Jong
(NIKHEF)
I will discuss the status of Run 2 of the Tevatron, and show some selected recent D0 (and CDF!) results on electroweak physics, heavy B mesons, QCD, top quark physics, and the prospects for Higgs boson searches.




Friday 17th September (2004)Friday 17th September 

Friday 17th September


11:15H331
NIKHEF COLLOQUIUM

Recent Results on CP violation and Rare B Decays from BaBar
Soeren Prell
(Iowa State University)




Thursday 23rd September (2004)Thursday 23th September 

Thursday 23th September


16:00H331
NIKHEF COLLOQUIUM

FOM beleid voor de komende jaren
Hans Chang
(FOM)
De traditionele jaarlijkse 'zeepkistronde' door de directeur van FOM, waarin hij de accenten van het FOM beleid zal bespreken. Let op: Deze voordracht vind plaats om 4 uur in de middag!




Friday 24th September (2004)Friday 24th September 

Friday 24th September


10:00University of Nijmegen
NIKHEF event

2nd symposium Dutch Particle Astrophysics
2nd symposium Dutch Particle Astrophysics
in the Gymnasion, Heyendaelseweg 141.




Friday 1st October (2004)Friday 1th October 

Friday 1th October


11:15H331
NIKHEF COLLOQUIUM

Highlights ICHEP'04 Beijing
Nicola Coppola
(NIKHEF)




Friday 8th October (2004)Friday 8th October 

Friday 8th October


14:30
NIKHEF event

voetbalwedstrijd NIKHEF-CERN
voetbalwedstrijd NIKHEF-CERN
11:15H331
NIKHEF COLLOQUIUM

The CLIC study of Multi-TeV e+/e- Linear Collider
Jean-Pierre Delahaye
(CERN)
After a brief description of a CLIC scheme to extend Linear Colliders into the Multi-TeV colliding beam energy range, the main challenges and the very promising results already achieved will be presented. The presentation will mainly focus on the Test Facility (CTF3) presently under construction at CERN within a broad collaboration to address the main key issues and demonstrate the feasibility of the CLIC technology before 2010.




Tuesday 12th October (2004)Tuesday 12th October 

Tuesday 12th October


15:00Spectrum
NIKHEF event

ATLAS borrel
ATLAS borrel
iedereen is van harte welkom !




Wednesday 13th October (2004)Wednesday 13th October 

Wednesday 13th October


16:00Z011 en Spectrum
NIKHEF event

ALTRAN innovation event
ALTRAN innovation event
sprekers: o.a. Prof.dr.ing. Dave Blank (UT Twente), Dr.Ir. Mathijs Soede (iRv)




Friday 15th October (2004)Friday 15th October 

Friday 15th October


11:15Z011/H331
Landelijk Seminarium Theoretische HEF

The Anthropic Landscape of String Theory
Leonard Susskind
(Stanford University)
Recent developments in observational cosmology, and string theory are forcing theoretical physicists to take take seriously the idea that the universe may be far bigger and more diverse than we ever imagined. Far from suggesting a unique explanation of the laws of particle physics and the constants of nature, the mathematics of string theory seems likely to lead to a universe full of what Alan Guth calls "Pocket Universes" with a tremendous diversity of different properties. If this is so, some questions will inevitably have Anthropic answers.




Tuesday 19th October (2004)Tuesday 19th October 

Tuesday 19th October


11:15H331
NIKHEF SEMINAR

Large-scale Protein Structure Calculation with Condor, CNS, and CYANA
Zachary Miller
(University of Wisconsin)
In April of 2004 over 500 proteins whose structures were already known were recalculated using state-of-the-art methods based on both CNS and CYANA. The calculation, approximately 3.5 years of compute time, was run with Condor High Throughput Computing software, and resulted in structures whose quality indicators were on average 1 standard deviation closer to the reference database. In this talk I will focus on the computing infastructure and the problems and challenges overcome.




Thursday 21st October (2004)Thursday 21th October 

Thursday 21th October


14:00H331
NIKHEF SEMINAR

The hierarchy problem in the Standard Model and Little Higgs theories (POSTPONED TO NEXT WEEK)
Maarten Brak
(Utrecht/NIKHEF)
At high energies, the three fundamental couplings of the Standard Model seem to converge to a single value. This hints at the appearance of a `Grand Unified Theory' (GUT) with only one coupling. I will briefly describe one such GUT, based on an $SU(5)$ gauge theory, and show that the assumption of such a theory yields a so-called hierarchy problem. But the problem already exists in the Standard Model, without assuming grand unification. It is due to large radiative corrections to the Higgs mass, rendering a small Higgs mass unnatural. In the second half of my talk, I will describe some recently discovered partial solution to the hierarchy problem, known as `Little Higgs' models. By imposing extra symmetries in a clever way, large contributions to the Higgs mass from Standard Model particles are cancelled against new particles, in a natural way.




Friday 22nd October (2004)Friday 22th October 

Friday 22th October


11:15H331
NIKHEF COLLOQUIUM

Heavy Ion Physics
Raimond Snellings
(NIKHEF)
I will review the progress in understanding QCD matter under extreme conditions based on the data obtained in the first four years of successful RHIC operations.




Saturday 23rd October (2004)Saturday 23th October 

Saturday 23th October


12:00NIKHEF
NIKHEF event

Open Dag WCW
Open Dag WCW




Tuesday 26th October (2004)Tuesday 26th October 

Tuesday 26th October


13:30H331
NIKHEF SEMINAR

The hierarchy problem in the Standard Model and Little Higgs theories
Maarten Brak
(UU/NIKHEF)
At high energies, the three fundamental couplings of the Standard Model seem to converge to a single value. This hints at the appearance of a `Grand Unified Theory' (GUT) with only one coupling. I will briefly describe one such GUT, based on an $SU(5)$ gauge theory, and show that the assumption of such a theory yields a so-called hierarchy problem. But the problem already exists in the Standard Model, without assuming grand unification. It is due to large radiative corrections to the Higgs mass, rendering a small Higgs mass unnatural. In the second half of my talk, I will describe some recently discovered partial solution to the hierarchy problem, known as `Little Higgs' models. By imposing extra symmetries in a clever way, large contributions to the Higgs mass from Standard Model particles are cancelled against new particles, in a natural way.




Thursday 28th October (2004)Thursday 28th October 

Thursday 28th October


15:30Spectrum
NIKHEF event

afscheid Guy Luijckx
afscheid Guy Luijckx
iedereen is van harte welkom !




Friday 29th October (2004)Friday 29th October 

Friday 29th October


10:00Lunteren
NIKHEF event

NNV Najaarsvergadering
NNV Najaarsvergadering




Wednesday 3rd November (2004)Wednesday 3th November 

Wednesday 3th November


16:45Z009
CWI, Z009
EXTERN COLLOQUIUM AT CWI, Z009

Lightpaths
dr. Cees de Laat
(UvA)
In this talk De Laat will present the current SURFnet and NetherLight developments. This talk explores some thoughts about the different usage models of optical and photonic networks. Different classes of users are identified. The services, required by the Internet traffic from those different classes of users, are analyzed and a differentiated Internet architecture is proposed to minimize the cost per transported packet for the whole architecture and to create the most economical network in terms of throughput and extensibility. Recent developments in the Global Lambda Integrated Facility (GLIF) will be presented. Cees de Laat is an Associate Professor at University of Amsterdam, The Netherlands. He received a Ph.D. degree in Physics from University of Delft. His research interests include optical networking, lambda switching and provisioning, policy-based networking and the Authorization, Authentication and Accounting architecture. He is responsible for the research on the Lambda switching facility (NetherLight). He implements research projects in the GigaPort Networks area in collaboration with SURFnet.




Friday 5th November (2004)Friday 5th November 

Friday 5th November


10:00n.t.b.
NIKHEF event

CERN 50 jaar symposium
CERN 50 jaar symposium




Wednesday 10th November (2004)Wednesday 10th November 

Wednesday 10th November


10:00UT Twente
NIKHEF event

symposium S.V. Arago
symposium S.V. Arago




Friday 12th November (2004)Friday 12th November 

Friday 12th November


11:15H331
NIKHEF COLLOQUIUM

Anomalous internal pair conversion as a sign for elusive light neutral particles
Fokke de Boer (MOVED TO 3 DECEMBER 2004)
(NIKHEF)
This colloquium will now take place on December 3rd, 2004
15:30Spectrum
NIKHEF event

25-jarig jubileum Robert Hart
25-jarig jubileum Robert Hart
Iedereen is van harte welkom !




Thursday 25th November (2004)Thursday 25th November 

Thursday 25th November


11:15Z011
NIKHEF COLLOQUIUM

Short term innovation driven by long term objectives
Rick Harwig
(CEO Philips Research)
An short overview will be given of Philips Electronics today, a company in a global highly competitive arena, focussing on healthcare, lifestyle products and technologies enabling the improvement of peoples' life. Profound changes have occurred in the last decade to the industry, which has strongly impacted the ways of working of Philips Research. Today much of our work proceeds in what we call open innovation, in network of global partnerships with academia, institutes, industry, suppliers and customers. On one hand it takes stamina to work on a relevant topic for the future for more than 10 years before actual business results, on the other hand the onset of a new consumer field leads to tornado growth and incredible price erosion forcing new approaches in going from science to industry and market. Some examples will be given to illustrate the positive spiral of enforcement of applications and model driven research and how long term technical objectives support maintaining a long term view in a short term orientated environment.
16:00Spectrum
NIKHEF event

PV Wijnfeest
PV Wijnfeest
Alle PV leden zijn van harte welkom !




Friday 26th November (2004)Friday 26th November 

Friday 26th November


11:15Z011/H331
Landelijk Seminarium Theoretische HEF

Gravitational Waves and LOFAR
Jan Kuipers
(Radboud University Nijmegen)




Wednesday 1st December (2004)Wednesday 1th December 

Wednesday 1th December


16:00Spectrum
NIKHEF event

borrel i.v.m. directie overdracht
borrel i.v.m. directie overdracht
Iedereen is van harte welkom !




Friday 3rd December (2004)Friday 3th December 

Friday 3th December


11:15H331
NIKHEF COLLOQUIUM

Diving for WIMPs: The search for dark matter in ANTARES
Lee Thompson (MOVED TO 28 JAN 2005)
(Sheffield)
This colloquium will now take place on January 28th, 2005
11:15H331
NIKHEF COLLOQUIUM

Anomalous internal pair conversion as a sign for elusive light neutral particles
Fokke de Boer
(NIKHEF)
The existence of short-lived neutral bosons in the MeV region is explored by searching for anomalous internal pair conversion (IPC). IPC is studied in nuclear reactions populating high energy levels in the alpha-nuclei 8Be, 12C and 16O at low bombarding energies. Special attention is paid to deviations in the e+e- angular correlation from IPC theory which might be explained by the emission of a short-lived neutral particle in these high energy transitions. In this search structures are found which could be due to several short-lived particles in the mass-region between 4 and 15 MeV/c2.




Wednesday 8th December (2004)Wednesday 8th December 

Wednesday 8th December


09:00NIKHEF hal
NIKHEF event

OR verkiezingen + taart van de directie (ipv 1 december)
OR verkiezingen + taart van de directie (ipv 1 december)




Friday 10th December (2004)Friday 10th December 

Friday 10th December


13:30Z011
Symposium on the occasion of the retirement of Peter de Witt Huberts

Symposium on the occasion of the retirement of Peter de Witt Huberts
Symposium on the occasion of the retirement of Peter de Witt Huberts
(NIKHEF)
Peter de Witt Huberts has played a leading role in nuclear and particle physics research in the Netherlands for almost 40 years. On the occasion of his retirement a special symposium is organized in Amsterdam on December 10th, 2004. Information on the symposium, the programme, the possibility to register for the symposium and how to reach it can be found at www.nikhef.nl/pdwh/. The research interests of Peter de Witt Huberts have ranged from the study of nuclear structure by means of high-resolution electron scattering experiments, measurements of the charge distribution of the neutron, the spin structure of the proton and neutrino astronomy. Many graduate students have completed a PhD thesis under his supervision. During a period of 7 years - when the AmPS ring was constructed, commissioned and employed - Peter de Witt Huberts served as director of the section K of NIKHEF.




Friday 17th December (2004)Friday 17th December 

Friday 17th December


11:15Z011
NIKHEF COLLOQUIUM

The AMS-02 Experiment on the International Space Station
Stefan Schael
(RWTH Aachen)
AMS-02 is a particle physics experiment in space. The purpose is to perform accurate, high statistics, long duration measurements of energetic (up to multi-TeV) primary charged cosmic ray spectra in space. One of the main physics goals is the search for Dark Matter. Collisions of dark matter in the galactic halo could produce antiproton, e+ and gamma. The antiproton, e+ and gamma from these collisions will produce deviations from the smooth energy spectra. Therefore, the precision measurement of the antiproton, e+ and gamma spectra could enable us to establish whether SUSY particles are the origin of Dark Matter. AMS-02 will collect 10^9 nuclei and isotopes (D, He, Li, Be, B, C, ... Fe) in three years. Among the interesting issues in physics are: Accurate determination of the ratio of boron to carbon over a wide range of energies provides crucial information regarding the propagation of cosmic rays in the galaxy. In particular, the ratio of $^{10}Be$ to the stable $^9Be$ will provide important information on the understanding of cosmic ray propagation. AMS-02 will be installed on the International Space Station in 2008.




Thursday 23rd December (2004)Thursday 23th December 

Thursday 23th December


16:00Spectrum
NIKHEF event

NIKHEF Kerstdiner
NIKHEF Kerstdiner




Monday 10th January (2005)Monday 10th January 

Monday 10th January


15:30centrale hal
NIKHEF event

nieuwjaarsreceptie
nieuwjaarsreceptie
Iedereen is van harte welkom !




Wednesday 12th January (2005)Wednesday 12th January 

Wednesday 12th January


15:30Spectrum
NIKHEF event

afscheid Willem de Vries
afscheid Willem de Vries
Iedereen is van harte welkom !!!




Friday 21st January (2005)Friday 21th January 

Friday 21th January


10:00Leiden
NIKHEF event

APP Symposium
APP Symposium




Friday 28th January (2005)Friday 28th January 

Friday 28th January


11:15H331
NIKHEF COLLOQUIUM

Diving for WIMPs: The search for dark matter in ANTARES
Lee Thompson
(Sheffield)
Our current understanding of the Universe indicates that only 5% of the total matter density of the Universe can be explained by visible mass in the form of stars, gas clouds, etc. Of the remaining 95% approximately 25% is expected to exist in the form of dark matter. The speaker will review the evidence for the existence of dark matter, will review recent results which place stringent limits on the various contributions to the Universe's matter density and will review current searches for dark matter which take place in the form of direct and indirect searches. In the latter case the sensitivity of the ANTARES neutrino telescope to neutralino type dark matter will be presented.




Thursday 3rd February (2005)Thursday 3th February 

Thursday 3th February


15:30Spectrum
NIKHEF event

40-jarig jubileum Gloria van den Heuvel
40-jarig jubileum Gloria van den Heuvel
iedereen is van harte welkom !




Friday 4th February (2005)Friday 4th February 

Friday 4th February


11:15H331
NIKHEF COLLOQUIUM

Preparing for physics in LHCb
Marcel Merk
(NIKHEF)
Monte Carlo studies are used to prepare the LHCb trigger, reconstruction and analysis software for the incoming data in 2007++. A review of the full software chain of event generation, simulation, trigger, reconstruction, selection and analysis will be highlighted using events of the decay channel Bs->Ds K. This Bs decay is one of the benchmark channels to measure the angle gamma of the CKM triangle. In the discussion I will try to indicate some of the challenges and potential systematic effects in the measurement and discuss our ideas on how to study them.




Friday 18th February (2005)Friday 18th February 

Friday 18th February


11:15Z011/H331
Landelijk Seminarium Theoretische HEF

Lattice QCD at non-vanishing baryonic densities
Zoltan Fodor
(Wuppertal)




Friday 25th February (2005)Friday 25th February 

Friday 25th February


11:15H331
NIKHEF COLLOQUIUM

Lorentz, his role in physics, in the Netherlands and in the world
Frits Berends
(Leiden)
Hendrik Antoon Lorentz (1853-1928) was appointed in 1878 to a new chair of theoretical physics at the University of Leiden. With his electron theory the classical theory of electromagnetism obtained its final form, then often called the Maxwell-Lorentz theory. In this theory the discovery of the Zeeman effect could be understood: the first glimpse of the electron. The Nobel prize followed in 1902. The Lorentz transformation in 1904 preceeded the special theory of relativity. Later on, Lorentz played a much admired role in the debate on the new developments in physics, in particular as chairman of a series of Solvay conferences. Gradually his stature outside of physics grew, both nationally as chairman of the Zuiderzee committee and internationally as president of the International Commission on Intellectual Cooperation of the League of Nations. At his funeral the overwhelming tribute was a recognition of his unique greatness.




Friday 4th March (2005)Friday 4th March 

Friday 4th March


11:15H331
NIKHEF COLLOQUIUM

Probing the Weak Interaction Spacetime Structure with Muon Decay
Art Olin
(TRIUMF (for the TWIST Collaboration))
Muon decay is an excellent place to study the structure of the weak interaction. Since it is a purely leptonic process, many uncertainties deriving from the internal strucure of the particles involved or from other interactions are eliminated. TWIST measures with high precision the momentum and angular dependence of positrons emitted from the decay of polarized positive muons. I will describe the apparatus, some of the novel analysis techniques that we have employed, and our future goals. New results for the muon decay parameters rho and delta will be presented, together with their implications regarding the spacetime symmetries of the weak interaction. http://xxx.lanl.gov/abs/hep-ex/0409063 http://xxx.lanl.gov/abs/hep-ex/0410045




Thursday 10th March (2005)Thursday 10th March 

Thursday 10th March


17:00Spectrum
NIKHEF event

bierfeest
bierfeest
Iedereen is van harte welkom !




Thursday 17th March (2005)Thursday 17th March 

Thursday 17th March


15:30Spectrum
NIKHEF event

afscheid August Boucher
afscheid August Boucher
Iedereen is van harte welkom !