In my talk I report on the calculation of Z-boson pair + 1 jet production at NLO QCD which is an important background process for Higgs and new physics searches. I will show that the QCD corrections improve the theoretical prediction with respect to scale variations which are used as an estimate of the theory uncertainty. At the LHC however, the appearence of new channels at NLO destabilize the scale behaviour. A significant scale reduction can only be obtained after vetoing the contribution of these channels by applying on the second jet.
Furthermore, this talk also reports on the calculation graviton production in association with a hard jet in large extra dimensions including QCD corrections. The experimental signal, a monojet plus missing energy, has a strong ability to probe the scale of higher extra dimensions. I show how QCD corrections improve the theoretical prediction and discuss other sources of theoretical uncertainties.
SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20100225T130000Z DTEND:20100225T140000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:497014f06daa9d5d6b00db5b25fcbcd5 DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Johannes Henn Title: A new infrared regularization for planar N=4 super Yang-Mills Abstract: I present an alternative to dimensional regularization of planar scattering amplitudes in N=4 super Yang-Mills by going to the Coulomb phase of the theory. The infrared divergences are regulated by masses obtained from a Higgs mechanism, allowing us to work in four dimensions. An important feature is that the previously discovered dual conformal symmetry becomes exact thanks to new terms acting on the Higgs masses. I also argue that exponentiation and Regge limits are easier to study compared to dimensional regularization. These ideas are illustrated by explicit results for the four-point amplitude up to three loops. SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20100218T130000Z DTEND:20100218T140000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:01ce37168e34420411da5fbf82c55dca DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Erik Plauschinn Title: Model Building Constraints for type IIB Orientifolds Abstract: In this talk, I discuss constraints for string theory constructions in the context of type IIB orientifold compactifications. In particular, in the first part of my talk I will focus on the tadpole cancellation conditions, the generalised Green-Schwarz mechanism and the computation of Fayet-Iliopoulos terms in the case of an orientifold projection leading to anti-invariant two- and four- cycles. In the second part of my talk, I discuss the general question of implementing an MSSM sector realised by D-branes into moduli stabilisation scenarios. SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20100215T100000Z DTEND:20100215T110000Z LOCATION;LANGUAGE=en:Nikhef, Room H320 TRANSP:OPAQUE SEQUENCE:0 UID:83aba16d0399630c3ad34f913e9fbaa8 DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Jean-Paul Ngome Title: Constants of motion deduced from a canonical algorithm SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20100211T100000Z DTEND:20100211T110000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:aac6eb7a50f81e20a471047d81888edd DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Salvatore Vitale Title: Asymptotic expansions of Maximum Likelihood estimators errors, with an application to gravitational waves generated in the inspiral phase of binary mergers Abstract: In this talk we describe a new methodology to calculate analytically the error for a maximum likelihood estimate (MLE) of physical parameters from Gravitational Wave (GW) signals. All the existing literature focuses on the usage of the Cramer Rao Lower bounds (CRLB) as a mean to approximate the errors for large signal to noise ratios. We show here how the variance and the bias of a MLE estimate can be expressed instead in inverse powers of SNRs where the first order in the variance expansion is the CRLB. As an application we compute the second order of the variance and bias for MLE of physical parameters from the inspiral phase of binary mergers and for noises of gravitational wave interferometers. The examples are limited to a single, optimally oriented, interferometer. We also compare the improved error estimate with existing numerical estimates. The value of the second order of the variance expansions allows to get error predictions closer to what is observed in numerical simulations. It also predicts correctly the necessary SNR to approximate the error with the CRLB and provides new insight on the relationship between waveform properties SNR and estimation errors. For example the timing match filtering becomes optimal only if the SNR is larger than the kurtosis of the gravitational wave spectrum. The power expansions can also be used for multiple measurements of the same observable. In that case the SNR should be replaced with SNR times the number of measurements. SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20100204T130000Z DTEND:20100204T140000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:51747260303fdcfb2419c9d81d091144 DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Koenraad Schalm Title: An emergent Fermi Liquid from a strongly coupled quantum critical point SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20100128T130000Z DTEND:20100128T140000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:d6d85e2c339f8d2f35735bc45abc0c49 DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Barbara Jäger Title: Weak boson scattering at the LHC SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20091203T130000Z DTEND:20091203T140000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:38105dceae5ecddc65a27c280bf9d614 DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Priscila De Aquino Title: Quantum Gravity/ADD at the LHC SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20091126T130000Z DTEND:20091126T140000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:9ab07fb823cc48ed7f7e971e936099a1 DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: João Baptista Title: Are vortices boundaries of singular monopoles? SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20091105T130000Z DTEND:20091105T140000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:c2bf3f187891b5d9342621ddaa967465 DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Damien George Title: Modelling an extra dimension with domain-wall branes Abstract: Extensions to the standard model of particle physics are vast and numerous. Particular attention has been given to models incorporating large extra dimensions, building on the idea of the Randall-Sundrum warped metric. I will focus on a variant of the second Randall-Sundrum model, where the extra dimension is infinite in size and the so called "brane" is generated by a bulk scalar field. This model is motivated by the desire to have the action symmetric in all spatial dimensions, with three-dimensionality arising from the spontaneous formation of a domain-wall. I will show how such a domain-wall forms, how scalar fields and massless chiral fermions can be confined to the domain-wall region, and how gauge fields can be incorporated using the Dvali-Shifman mechanism. I will use these building blocks to write down an SU(5) grand unified standard model in 4+1-dimensions. I will then outline the modifications to cosmology, in particular the expansion rate of the universe, that such a theory implies. SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20091001T120000Z DTEND:20091001T130000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:d00545d4d930d15127cc32364a5f9d6f DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Luca Merlo Title: Discrete flavour symmetries in neutrino oscillations, LFV and leptogenesis SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20090924T090000Z DTEND:20090924T100000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:28af3fa980a179a74aff987b9b2a9388 DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Jochum van der Bij Title: TBA SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20090831T120000Z DTEND:20090831T130000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:4984998ba00dc3f8b69e9dd16e86cfae DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Johan Alwall Title: Model-independent approaches to missing energy signals at the LHC Abstract: Signatures involving missing energy are among the most enticing at the LHC, since they might indicate the production of Dark Matter. Such signals have most commonly been approached in the framework of the minimal supersymmetric extension of the Standard Model. This model is however only one in a class of models involving a new conserved quantum number, which ensures stability of a Dark Matter particle. I will here present model-independent approaches to this type of signals, which avoid restricting the analysis of these signals to SUSY, and instead allows for comparisons with, and interpretations in terms of, any model. SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20090820T120000Z DTEND:20090820T130000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:12ed37b25a591063a7d0103d18f2360c DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Mert Aybat Title: Bulk Fermions in Soft Wall Models Abstract: Models with warped extra dimensions and a soft infrared wall provide an exciting realization of electroweak symmetry breaking, with phenomenological implications that go beyond the standard Randall-Sundrum model with a hard wall. We incorporate bulk fermions in soft wall models and study electroweak and flavor constraints in fully realistic models, including a heavy top quark. We also discuss LHC phenomenology for these models. SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20090709T120000Z DTEND:20090709T130000Z LOCATION;LANGUAGE=en:Nikhef, Room N328 TRANSP:OPAQUE SEQUENCE:0 UID:99a721c8d9e4fd691b51454224f8ceb1 DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Marcel van Kessel Title: Quantum Extremism: The Convexity Problem in Minkowski Space Abstract: The reality and convexity of the effective potential in quantum field theories has been studied extensively in the context of Euclidean space-time. It has been shown that canonical and path-integral approaches may yield different results, thus resolving the \'convexity problem\'. We discuss the transferral of these treatments to Minkowskian space-time, which also necessitates a careful discussion of precisely which field configurations give the dominant contributions to the path integral. In particular, we study the effective potential for the N=1 linear sigma model. SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20090702T120000Z DTEND:20090702T130000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:c8a8d34ddc66cd8b04e7b71552614c92 DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Hoang Ngoc Long Title: Supersymmetric 3-3-1 model and inflationary scenarios SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20090604T120000Z DTEND:20090604T130000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:aab44e97dcbadbc1bf79d3a78c9084d9 DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Gabriele Honecker Title: Towards the Standard Model on Fractional Branes Abstract: If string theory is the one unifying theory for gauge theories and gravity, it should be able to reproduce the known features of particle physics. One attempt to realise the Standard Model from string theory compactifications consists of intersecting D6-branes in type IIA orientifolds. I will briefly review the characertistic features and compare them with other string constructions. I will then proceed to a recently found phenomenologically appealing class of supersymmetric Standard Model spectra on the Z6\' orbifold and present the computation of gauge thresholds for the fractional branes employed. SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20090409T120000Z DTEND:20090409T130000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:80b50850d6c593a39c014872d1d3d64f DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Gavin Salam Title: Towards Jetography Abstract: This talk will start with an overview of past years\' work to put LHC jet finding on a reliable footing, and in particular satisfying the Snowmass requirements, which were set out nearly 20 years ago. It will then proceed to examine how jet-finding might evolve in coming years. In particular I will discuss ongoing work that uses QCD calculations to guide jet-finding choices, with a long term goal of developing a form of autofocus for jets, so as to provide easy and optimal \'jetography\' even for non-experts. SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20090402T120000Z DTEND:20090402T130000Z LOCATION;LANGUAGE=en:Nikhef, Room N328 TRANSP:OPAQUE SEQUENCE:0 UID:9d49e02187aea3f567db64a198c19527 DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Diederik Roest Title: Moduli Stabilisation and Orientifold Reductions Abstract: An important issue in string theory is the stabilisation of moduli. After an introduction to the subject, we will discuss recent results on how this can be achieved in a simple setting by orientifold reductions with fluxes. SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20090326T130000Z DTEND:20090326T140000Z LOCATION;LANGUAGE=en:Nikhef, Room F013 TRANSP:OPAQUE SEQUENCE:0 UID:60a330fd7310116c2a27e2789a613a15 DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Simon de Visscher Title: QCD radiation in the production of heavy colored particles at the LHC SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20090220T120000Z DTEND:20090220T130000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:2e2d1c3fc78db32f3425966d5b5ad13c DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Stefan Groot Nibbelink Title: Towards heterotic MSSM orbifolds in blowup Abstract: Heterotic orbifolds provide promising constructions of MSSM-like models in string theory. We investigate the connection of such orbifold models with smooth Calabi-Yau compactifications by examining resolutions of the T^6/Z6--II orbifold (which are far from unique) with Abelian gauge fluxes. These gauge backgrounds are topologically characterized by weight vectors of twisted states; one per fixed point or fixed line. The VEV\'s of these states generate the blowup from the orbifold perspective, and they reappear as axions on the blowup. We explain methods to solve the 24 resolution dependent Bianchi identities and present an explicit solution. Despite that a solution may contain the MSSM particle spectrum, the hypercharge turns out to be anomalous: Since all heterotic MSSM orbifolds analyzed so far have fixed points where only SM charged states appear, its gauge group can only be preserved provided that those singularities are not blown up. SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20090212T150000Z DTEND:20090212T160000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:fad7fec9ff0627f42a13c228ee2daeac DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Joe Conlon Title: Gauge Unification in Local String Models: is M_GUT a mirage? Abstract: I study threshold corrections for local string models. The presence of a large bulk volume gives a significant anomalous contribution when transforming from holomorphic to physical gauge couplings. These suggest the unification scale should be raised from M_s to R M_s. I study these effects in string models and find full agreement for local D3/D3 models. For D3/D7 models I discuss discrepancies with the field theory formula. I comment on implications for gauge coupling unification and the GUT scale. This talk is based on 0901.4350. SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20090129T130000Z DTEND:20090129T140000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:7b7d811db8d3b3a8c843c4b059eba04e DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Alessandro Torrielli Title: Infinite-dimensional symmetries, integrable systems, and AdS/CFT Abstract: We will discuss infinite-dimensional (Hopf algebra) symmetries in integrable systems, with special emphasis on the R-matrix formalism, standard mathematical classifications and the role of Yangians. We will then discuss how all this has recently become a powerful tool of investigation in the context of the AdS/CFT conjecture. SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT BEGIN:VEVENT ORGANIZER;CN=Nikhef Theory:MAILTO:theory-wide@nikhef.nl DTSTART:20081204T130000Z DTEND:20081204T140000Z LOCATION;LANGUAGE=en:Nikhef, Room H331 TRANSP:OPAQUE SEQUENCE:0 UID:24da0bba77b19b36369d89edd5d65507 DTSTAMP:20100315T200600Z CATEGORIES;LANGUAGE=en:Physics,Theory,Seminar DESCRIPTION;LANGUAGE=en:Speaker: Michael Lennek Title: The Free-Fermionic Landscape SUMMARY;LANGUAGE=en:Nikhef Theory Seminar PRIORITY:9 CLASS:PUBLIC URL:http://www.nikhef.nl/pub/theory/seminar.html STATUS:CONFIRMED END:VEVENT END:VCALENDAR