Uta Klein
(Liverpool)
26/09/2007, 09:10
Juan M. Maldacena
(IAS Princeton)
26/09/2007, 11:30
David C. Dunbar
(Swansea)
26/09/2007, 12:15
Federico Farchioni
(Münster)
26/09/2007, 15:15
Juan M. Maldacena
(IAS Princeton)
26/09/2007, 17:30
Yuri Kovchegov
(Ohio)
27/09/2007, 09:00
Lev Lipatov
(Hamburg/St.Petersburg)
27/09/2007, 09:45
Vladimir Braun
(Regensburg)
27/09/2007, 11:15
Thorsten Feldmann
(Siegen)
27/09/2007, 12:00
Philipp Hägler
(TU München)
27/09/2007, 12:30
Dr
Agustin Sabio Vera
(CERN)
27/09/2007, 14:30
Firstly, we review the Moebius invariance present in the Regge limit of
perturbative QCD, and argue that the associated conformal spins are related to
azimuthal angle correlations in the hadro-production of dijets.
Secondly, we report on progress in the study of the connection between
unitarity corrections at small x and critical behaviour of gravitational collapse in
five dimensions.
Prof.
Yuri Kovchegov
(Ohio State University)
27/09/2007, 14:30
We study the matter produced in heavy ion collisions assuming that this matter is strongly interacting and employing AdS/CFT correspondence to investigate its dynamics. At late proper times $\tau$ we show that Bjorken hydrodynamics solution, obtained recently by Janik and Peschanski using gauge-gravity duality, can be singled out by simply requiring that the metric tensor is a real and...
Mr
Sebastian Klein
(DESY-Zeuthen)
27/09/2007, 14:30
QCD precision tests based on deeply inelastic scattering data require
the detailed knowledge of the heavy flavor contributions to the
structure functions. We report on recent calculations of the heavy flavor
Wilson coefficients to O(a_s^2), unpolarized and polarized,
in the region Q^2/m^2 => 10 and on first results relevant at
O(a_s^3).
Dr
Michele Salvadore
(II. Institut fuer Theoretische Physik, Universitaet Hamburg)
27/09/2007, 15:00
We address the computation of the four-point function of R-currents in N=4 SYM in the
Regge limit as a tool to study such regime in a gauge invariant framework. The
R-current is a close analog of the EM current in QED and SQED, which couple a gauge
invariant state ('photon') to a YM system. Gauge invariance guarantee that the
amplitude is free from infrared divergences. We discuss some...
Felix Rust
(Max-Planck-Institut für Physik, München)
27/09/2007, 15:00
Using a generalization of the AdS/CFT correspondence, it is possible to determine
thermodynamic properties of strongly coupled field theories. Aiming for a description
of the characteristics of systems such as the quark gluon plasma, we study the
gauge/gravity dual of a finite
temperature field theory at finite isospin chemical potential. Therefore we introduce
a probe of two coincident...
Dr
Kouhei Hasegawa
(Desy Zeuthen, Theory group)
27/09/2007, 15:00
We calculate the light-by-light scattering type two-loop QCD corrections due to the light quark loops in the
para-charmonium decays $eta_{c} rightarrow gamma gamma$ and $eta_{c} rightarrow g g$. We replace
the mass of the internal charm quarks by an artificial large mass and obtain the result as a series in the
large mass. The obtained series can be transformed into the good convergent...
Dr
Mikhail Rogal
(DESY, Zeuthen)
27/09/2007, 15:30
In this presentation I would like to discuss technical and computational problems on
the derivation of the perturbative QCD corrections to three loops for the charged
current structure functions F_2, F_L and F_3 for deep-inelastic neutrino-proton
scattering in the combination "nu P - nubar P". In leading twist approximation we
calculate the first six odd-integer Mellin moments in the case...
Dr
Johannes Grosse
(Institute of Physics, Jagiellonian University)
27/09/2007, 15:30
We consider flavors in a holographic description of a boost-invariant viscous plasma by embedding
D7 branes into the dual geometry. We obtain the (time-dependent) chiral quark condensate and
meson spectra. To first order both agree with the adiabatic approximation, i.e. the prediction from
the static AdS black hole. For very late times the supersymmetric configurations are approached.
Mr
Martin Hentschinski
(University of Hamburg)
27/09/2007, 15:30
We investigate the derivation of reggeon transition vertices from Lipatov's gauge
invariant effective action for high energy processes in QCD. In particular we address
the question of longitudinal integrations in order to reduce the vertices into the
required purely transverse form. We present a momentum space derivation of the
BFKL-kernel and verify the vanishing of the 2 to 3 reggeon...
Mr
René Meyer
(Max-Planck-Instute for Physics, Munich, Germany)
27/09/2007, 16:30
We investigate the effect of a pure electric or magnetic Kalb-Ramond B-field on
the physics of a D7 brane probe in the context of the AdS/CFT correspondence,
both at finite and zero temperature. We find a confinement/deconfinement
phase transition in both cases, and chiral symmetry breaking for the magnetic
field. The general behaviour is that the magnetic field acts confining, while...
Dr
Schwennsen Florian
(Universitaet Hamburg)
27/09/2007, 16:30
We discuss the inclusive production of jets in central regions of rapidity in the
context of $k_T$-factorization at next-to-leading order (NLO). Calculations are
performed in the Regge limit making use of the NLO BFKL results. We introduce a jet
cone definition and carry out a proper phase-space separation into multi-Regge and
quasi-multi-Regge kinematic regions. We discuss two situations:...
Dr
Rutger Boels
(Niels Bohr International Academy (from sept. 1))
27/09/2007, 16:30
Many recent advances in the calculation of scattering amplitudes are inspired by
insights from twistor space as initiated by Witten. However, little direct use has
been made untill recently of the extra structure available on the twistor space.
Partly based on joint research with Lionel Mason and David Skinner, I will
present a simple method of deriving actions on twistor space from...
Mr
Mathias BUTENSCHÖN
(Universität Hamburg)
27/09/2007, 16:30
In most of the mass range encompassed by the limits from the direct search and the
electroweak precision test, the Higgs boson of the standard model preferably decays
to bottom quarks. We calculated, in analytic form, the dominant two-loop electroweak
correction, of O(G_F^2 m_t^4), to the partial width of this decay. It amplifies the
familiar enhancement due to the O(G_F m_t^2) one-loop...
Dr
Ingo Kirsch
(ETH Zuerich)
27/09/2007, 17:00
In this talk I show how heavy-light mesons can be studied using the AdS/CFT
correspondence. For this I embed two D7 brane probes at different positions into the
dual supergravity background. I establish the non-Abelian Dirac-Born-Infeld (DBI)
action for these probes which involves a 2x2 matrix. The off-diagonal elements of
this U(2) fluctuation matrix correspond to the heavy-light mesons,...
Dr
theodoros diakonidis
(DESY, Zeuthen)
27/09/2007, 17:00
The 1-loop computation of the processes $\tchi_i \tchi_j \to \gamma Z$ has been
performed at an arbitrary c.m. energy for any pair of MSSM neutralinos. As an
application suitable for Dark
Matter (DM) searches, the neutralino-neutralino annihilation is studied at the limiting
case of vanishing relative velocity, describing the present DM distribution in the
galactic
halo; and at a...
Dr
Leszek Motyka
(Hamburg University and Jagellonian University)
27/09/2007, 17:00
Impact-factors are presented corresponding to a baryon scattering at large energies
by 2,3 and 4 gluon coupling. The small-x evolution of the impact factors is studied
for various numbers of Reggeons in the t-channel. We find a new C-even BKP state
that couples to baryons and a new 3->4 Reggeon transition vertex.
Dr
Nadav Drukker
(Humboldt University)
27/09/2007, 17:00
I will present some new results about supersymmetric Wilson loops in four dimensional
YM. First I will present a large class of operators preserving 1/2, 1/4, 1/8 and 1/16
of the supersymmetries of the vacuum. Then I will show a possible realtion between
some of those loops, following an arbitrary curve on an S^2 subspace of R^4 to Wilson
loops in two dimensional YM. To the extent that...
Ms
Floriana Giannuzzi
(University of Bari and INFN sezione di Bari)
27/09/2007, 17:30
AdS/QCD correspondence is able to predict quark-antiquark potential in the static
limit [1]. We use this piece of information together with the Salpeter equation
(Schroedinger equation with relativistic kinematics) and a short range hyperfine
splitting potential to determine quark masses and quark potential parameters. Assuming
a quark-diquark structure for the S-wave low-lying baryons...
Mr
Leonardo Vernazza
(Institute für Theoretische Physik E, RWTH Aachen)
27/09/2007, 17:30
I present an analysis of Hadronic $B$ decays in the MSSM with large $\tan
\beta$. I consider all new four-quark operators arising in the MSSM and I
give estimates for the corresponding Wilson coefficients. I select the most
relevant new four-quark operators and I calculate their contribution to non
leptonic $B$ decays. Significant differences with the SM are found in
penguin...
Dr
Grigorios Chachamis
(University of Wuerzburg)
27/09/2007, 17:30
Gauge boson production at the LHC
Dr
Mohab Abou Zeid
(Institut des Hautes Etudes Scientifiques, Bures-sur-Yvette)
27/09/2007, 17:30
I review the recent construction of a family of new twistor string theories which are
free from world-sheet anomalies and give the space-time spectra of Einstein
supergravities, with second order field equations, instead of the higher derivative
conformal supergravities that arose from earlier twistor strings. I then discuss the
calculation of gauge theory and gravity amplitudes in the...
Dr
Michael Beyer
(Institut für Physik, Univ. Rostock)
27/09/2007, 18:00
We construct an approximate holographic dual of QCD from experimental hadron
properties. Conformal symmetry breaking and other IR effects are described
exclusively by deformations of the anti-de Sitter background metric. This framework
allows us to reproduce the empirically found linear square-mass trajectories of
universal slope for radially and orbitally excited hadrons. The predictions...
John W. Harris
(Yale)
28/09/2007, 09:00
David Mateos
(Santa Barbara)
28/09/2007, 09:45
Hong Liu
(Boston)
28/09/2007, 10:30
Niklas Beisert
(AEI Golm)
28/09/2007, 14:00
Michael Teper
(Oxford)
28/09/2007, 14:45
Lance Dixon
(Stanford)
28/09/2007, 15:15
Dr
Farvah Nazila Mahmoudi
(Uppsala University)
The Bulk Randall-Sundrum model, where all Standard Model particles except
the Higgs are free to propagate in the bulk, predicts the existence of Kaluza-Klein (KK)
modes of the gluon with a large branching into top-antitop pairs. We study the production
of the lowest KK gluon mode at the Tevatron energy and use the data on the top cross-
section from the Run II of Tevatron to put a bound on...
