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Dr sebastian white (Brookhaven National Lab)PHENIX has observed a very large spin dependent asymmetry in forward neutron production in pp collisions at several energies up to Sqrt[s]= 500 GeV. We present results on beam energy and x_F dependence of this asymmetry and discuss the large discrepancy with currently available calculations of this effect.Go to contribution page
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Vassilis Pandis (DESY)To be advisedGo to contribution page
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Prof. Gerardo Herrera Corral (Depto de Fisica, CINVESTAV)LHC and post-LHCA proposal to incorporate a new subdetector into the ALICE detector at the LHC is presented. The new system consists of four stations of scintillator pads at 20 and 55 meters from the interaction point on both sides. The system would extend the rapidity coverage increasing the sensitivity of the experiment to tag the diffractive rapidity gap. The new system would enhance the...Go to contribution page
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Dr Kirill Semenov-Tian-Shansky (CPHT Ecole Polytechnique, LPT Orsay)Diffraction in DISThe concept of generalized parton distributions (GPDs), non-diagonal matrix elements of quark-antiquark or gluon-gluon non local operators on the light cone, has recently been extended to baryon to meson and (and baryon to baryon) transition distribution amplitudes (TDAs), non diagonal matrix elements of three quark operators between two hadronic states of different baryon number (or...Go to contribution page
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Dr Christophe Royon Royon (IRFU-SPP, CEA Saclay)We present a new method to test the Standard Model expectations at the LHC using photon-induced WW production. Both W decay in the main ATLAS or CMS detectors while scattered protons are measured in forward detectors. The sensitivity to anomalous WW gamma quartic and triple gauge coupling can be improved respectively by more than three orders of magnitude or a factor 30 compared to the...Go to contribution page
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Marco Rossi (CS)We study the first sub-leading correction O(lns^0) to the cusp (minimal) anomalous dimension in the high spin expansion of finite twist operators in N=4 SYM theory. This approximation is governed by a linear integral equation derived from Bethe Ansatz equations describing the 'asymptotic' spectrum of the dilatation operator. We emphasise how easily the weak coupling expansion can be obtained...Go to contribution page
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Dr Rainer Schicker (Phys. Inst., University Heidelberg)LHC and post-LHCThe abstract is under review by ALICE Conference Committee, I will send when approvedGo to contribution page
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Antonio Vilela Pereira (TO)The observation of inclusive diffraction at LHC with the CMSdetector at √s=900, 2360 and 7000 GeV is presented, along with a comparison of the data with thepredictions of the PYTHIA and PHOJET generators.Go to contribution page
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Prof. Laszlo Jenkovszky (Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine)Saturation in deep inelastic scattering (DIS) and deeply virtual Compton scattering (DVCS) is associated with a phase transition between the partonic gas, typical of moderate x and Q^2, and, a partonic fluid, created at increasing Q^2 and decreasing Bjorken x. In the statistical interpretation of DIS, the large-x, (1-x)^n factor in the structure function (SF) is associated with a perfect gas,...Go to contribution page
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Dr Sergey Troshin (IHEP, Protvino, Russia)Diffraction in nuclear physicsThe role of reflective scattering in formation of the deconfined state will be discussed along with the role of rotating matter coherent effects. These effects lead to the new interesting conclusions on the phase structure of strongly interacting matter and quark-gluon plasma formation.Go to contribution page
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Dr Martin Poghosyan (TO)A model, based on Gribov’s Reggeon calculus, is proposed and applied to processes of soft diffraction in hadronic interactions at high energies. It is shown that by accounting for absorptive corrections for all legs of triple-Regge and loop diagrams a good description of available experimental data on soft diffraction can be obtained in the energy range from ISR, FNAL to Tevatron (from...Go to contribution page
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Prof. Risto Orava (Helsinki Inst. of Physics and Univ. of Helsinki, CERN)LHC and post-LHCAbstract Photon bremsstrahlung is proposed to be used to identify elastic proton-proton interactions at the LHC. In addition to a measurement of the elastic pp cross section (assuming that the elastic slope is known), the bremsstrahlung photons will allow the evaluation of the total pp cross section, luminosity and to align the Zero Degree Calorimeters (ZDCs).Go to contribution page
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Mr Marek Tasevsky (Institute of Physics of ASCR, Prague)LHC and post-LHCDiffractive physics program for the ATLAS experiment is discussed with emphasis on the Central Exclusive production. While making up a large part of the total proton-proton cross section, the experimental definition of diffractive processes is still under discussion. At low luminosities, a L1 trigger based on requiring rapidity gaps can be used, while at high luminosities, the use of...Go to contribution page
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Dr Alan D. Martin (IPPP, Durham)LHC and post-LHCabstract will be sent laterGo to contribution page
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Prof. Konstantin Goulianos (The Rockefeller University)Results on diffractive W and Z production and an update on the diffractive structure function extracted from dijet production are presented and compared with previously reported results and with expectations.Go to contribution page
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Claudio Ciofi Degli Atti (Department of Physics University of Perugia and INFN Sezione di Perugia, Italy)The cross sections for a variety of diffractive processes in proton-nucleus scattering, associated with large gaps in rapidity, are calculated [1] within an improved Glauber-Gribov theory, where the inelastic shadowing corrections are summed to all orders by employing the dipole representation [2] and the effects of nucleon-nucleon correlations, leading to a modification of the nuclear...Go to contribution page
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Dr Christophe Royon Royon (IRFU-SPP, CEA Saclay)to be advisedGo to contribution page
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Salvatore Fazio (BNL)SaturationOverview of the status of art of the diffractive physics program with the future EIC/eRHIC machine will be given. eRHIC is a machine designed to accelerate an electron beam with energies ranging up to 20 (30) GeV to collide with a hadron beam (protons, nuclei) at an energy which can be varied up to 325 GeV. The high luminosity of the machine, expected in the order of 1034 cm-2 s-2, will open...Go to contribution page
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Mr Gustavo Gil da Silveira (Universidade Federal do Rio Grande do Sul)A new mechanism is presented for the Central Exclusive Diffractive production of the Standard Model Higgs boson in Ultraperipheral Collisions at LHC. The Higgs boson is centrally produced by Double Pomeron Exchange with two Large Rapidity Gaps emerging in the final state, being the main experimental signature for this process. The Higgs boson photoproduction is studied within this new...Go to contribution page
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Dr Sergey Baranov (P.N.Lebedev Institute of Physics)Diffraction in DISDiffractive production of D* mesons at HERA is considered in the framework of collinear two-gluon exchange model. Theoretical results are compared with recent experimental data collected by the H1 and ZEUS collaborations both in the real photoproduction and the deep inelastic regimes, and a reasonably good agreement is found in all cases.Go to contribution page
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Dr Sebastian Kuhn (Old Dominion University)Jefferson Lab with its 6 GeV continuous electron beam of high luminosity and high polarization has taken a large set of data on electron scattering from (polarized and unpolarized) nucleon targets, covering DIS at moderate Q^2 and high x as well as the transition region where hadronic effects become important (higher twist and resonance excitation contributions to the cross section). Using the...Go to contribution page
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Dr Morgan Murray (University of Glasgow)The study of Generalised Parton Distributions (GPDs) promises to provide new knowledge of the structure of the nucleon, including, most notably, access to the total angular momentum of quarks within the nucleon. It can be difficult to ascertain new information on the distributions, but amongst all the exclusive processes that can provide access, Deeply Virtual Compton Scattering (DVCS) is...Go to contribution page
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Lev Lipatov (PNPI St. Petersburg)I remind the gauge invariant action for the reggeized gluon interactions. It allows one to constact next-to-leading corrections to the BFKL and BKP equations. A similar general covariant action for the reggeized graviton interactions in the Einstein gravity is derived. The known results for the reggeon trajectory and reggeon-graviton vertices are reproduced. Other applications of this action...Go to contribution page
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Mr Mairon Machado (GFPAE - IF - UFRGS)The single and double diffractive cross sections for heavy quarks production are evaluated at NLO accuracy for hadronic and heavy ion collision at the LHC. Diffractive production of charm, and bottom, is the main subject of this work and predictions for Ca-Ca,Pb-Pb and p-Pb collision are provided. The hard diffraction formalism is considered using Regge factorization, where the Pomeron is...Go to contribution page
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Mrs Anna Cisek (Institute of Nuclear Physics PAN, Krakow)Diffraction in DISProtons and antiprotons at collider energies are a source of high energy Weizs\"acker--Williams photons. This opens up a possibility to study at the LHC exclusive photoproduction of heavy vector mesons at energies much larger than possible at the HERA accelerator. We present selected results on the production of vector mesons $\rho$, $\omega$, $\phi$, $J/\Psi$ and $\Upsilon$. I will show...Go to contribution page
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Fabrizio Ferro (GE)Totem is the only LHC experiment that will explore the forward region at pseudorapidity larger than 3.1 The main goal is the measurement of the total and elastic cross-section at 14 TeV and the study of diffractive physics in the forward region. The experiment approved and funded in the 2006, was build, largely commissioned and started his data taking in December 2009. The total cross...Go to contribution page
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Prof. Douglas Ross (Southampton University)SaturationUsing a modification of the BFKL equation which admits discrete pomeron pole solutions, we obtain a good fit to HERA data on structure functions at low-x, including the Q^2 dependence of the 1/x slope. The fit is very sensitive to the running of the QCD coupling, up to high energies and therefore sensitive to any new physics which may be encountered. It is suggested that the quality of such...Go to contribution page
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Christoffer Flensburg (Lund University)SaturationDiffractive excitation is usually described by the Good--Walker formalism for low masses, and by the triple-Regge formalism for high masses. In the Good--Walker formalism the cross section is determined by the fluctuations in the interaction. By taking the fluctuations in the BFKL ladder into account, it is possible to describe both low and high mass excitation by the Good--Walker...Go to contribution page
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Dr Nigel Buttimore (Trinity College Dublin)Total cross sections and the phases of forward collision amplitudes form part of the early studies when a new energy window becomes available as is provided by the Large Hadron Collider. Enhancement of the forward elastic differential cross section above that expected from estimates of dispersion and optical theorem values may result from the presence of hadronic spin dependence in addition...Go to contribution page
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Dr Krzysztof Kutak (University of Antwerp)LHC and post-LHCWe will discuss phenomena of production of forward jet at the LHC. After brief introduction to high energy factorization we will present matrix elements relevant for production of forward jets focusing on their high energy behavior and dependence on transversal momentum of off shell gluon. We will also investigate effects of angular ordered parton shower and its interplay with matrix...Go to contribution page
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Benoit Roland (CERN)Studies of the forward processes are important tests of the standard model and inputs for Monte Carlo tuning. A measurement of the energy flow in the forward pseudorapidity region of CMS, 3.15 < |eta| < 4.9, is presented for 3 values of the centre-of-mass energy sqrt(s) = 0.9 TeV, 2.36 TeV and 7 TeV. The forward energy flow is measured for Minimum Bias events and for events with a central...Go to contribution page
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Firooz Arash (Tafresh University, Iran)We have calculated $\delat g$ over g in the context of valon representation of hadrons and have shown that although it may be small, the gluon contribution to the nucleon spin can be sizable. The calculation is done for every kinematics that there is data, including the very recent releases from HERMES and COMPASS collaborations. It is shown that the first moment of gluon polarization in...Go to contribution page
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Dr Amir Rezaeian (Santa Maria Universidad)SaturationIn high density QCD the hadron production stems from decay of mini-jets that have the transverse momenta of the order of the saturation scale. I will show that this idea is able to describe in a unique fashion the first data from the LHC for the inclusive charged-hadron production in pp collisions, the deep inelastic scattering at HERA at small Bjorken-x, and the hadron multiplicities in AA...Go to contribution page
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Prof. Boris Kopeliovich (UTFSM)SaturationBroadening of gluons propagating through a nucleus is slowed down by the saturation effects in the target. This gives rise to an equation for the saturation scale which solution deviates from the leading order linear dependence on nuclear thickness T_A and becomes constant for very large T_A. The results for the saturation scale are similar to numerical solutions of the BK equation. In the...Go to contribution page
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Prof. Eugene Levin (UTFSM and Tel Aviv University)SaturationTwo main approaches will be discussed. The first one is the high energy phenomenology based on Pomeron interactions. The main questions that I would like to answer, is what kind of soft model can we trust theoretically and what we can predict for the inclusive production at LHC. The second approach is the gluon saturation (Clor Glass Condensate} in which the hadron production stems from the...Go to contribution page
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Mr Prometeusz Jasinski (Institut für Kernphysik, Mainz)COMPASS is a fixed target experiment using secondary high-energetic hadron beams provided by the CERN SPS. In 2008 and 2009, a large amount of data has been collected with a 190 GeV/c pion beam for the investigation of the hadron spectrum in diffractive and central production processes. A big variety of observed final states, including $\pi\pi\pi$, $\pi\pi^0\pi^0$, $\pi\eta\eta$, $\pi K_s...Go to contribution page
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Mrs Mayya Golembiovskaya (DESY, Zeuthen)The HERMES experiment at DESY, Hamburg collected a set of data on hard exclusive vector meson (rho^0, phi, omega^0) leptoproduction process using the 27.6 GeV HERA longitudinally polarized lepton beam and longitudinally and transversely polarized or unpolarized gas targets. Measurements of exclusive vector mesons production allow one to study the structure of the nucleon, since the process can...Go to contribution page
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Vladimir Zoller (ITEP, Moscow)Diffraction in DISThe non-conservation of charmed-strange current in the neutrino deep inelastic scattering strongly affects the longitudinal structure function, $F_L$, at small values of Bjorken $x$. The corresponding correction to $F_L$ is a higher twist effect enhanced at small-$x$ by the rapidly growing gluon density factor. As a result, the component of $F_L$ induced by the...Go to contribution page
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Dr Lara De Nardo (Gent University)Results of the measurements of inclusive proton and deuteron inelastic scattering cross sections at the HERMES experiment are presented. The structure functions $F_2^p$ and $F_2^d$ are determined using a parameterization of existing data for the longitudinal-to-transverse virtual-photon absorption cross section ratio. The HERMES results provide data in the ranges $0.006\leq x\leq...Go to contribution page
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Ramoona Shehzadi (University of Bonn)To be advisedGo to contribution page
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Dr Achim Hillenbrand (DESY)The analysis of transverse momentum dependent quark distribution functions (TMDs), which are related to spin orbit correlations of the quarks within the nucleon, is an active field of research. One way to gather information about TMDs on the experimental side is the measurement of azimuthal single-spin asymmetries (SSA) A^h_UT in semi-inclusive deep-inelastic scattering (SIDIS) of...Go to contribution page
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Dr Oleg Selyugin (JINR)A new analysis of the differential cross sections of the elastic proton-proton and proton-antiproton scattering in a wide energy region from PL > 3 GeV up to sqrt(s) = 1800 GeV in the Coulomb-hadron interference region was carried out to search for the existence of special structures over the background exponential behavior of the diffraction peak. On the basis of many...Go to contribution page
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Prof. Laszlo Jenkovszky (Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine)A models for low missing mass M_X diffraction dissociation (DD), based on the factorization properties of the high-energy, Pomeron-exchange scattering amplitude, is constructed. The properties of the inelastic Pp-->M_X transition form factors (inelastic vertices) are those known from \gamma-p scattering at JLab, with the photon-Pomeron similarity assumed. The direct-channel, low-energy...Go to contribution page
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Dr Jan Friedrich (Physik Department E18, Technische Universität München)COMPASS at CERN uses hadron and muon beams with up to 200 GeV/c momentum, produced from the SPS proton beam, for investigations in hadron structure and spectroscopy. From a pilot run with a 190 GeV/c pion beam on a lead target, various results will be presented, including the observation of the spin-exotic \pi_1(1600) resonance in the momentum transfer region...Go to contribution page
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Prof. Yogendra Srivastava (University of Perugia & INFN)To settle the question whether the growth with energy is universal for different hadronic total cross-sections, we present results from theoretical models for $\pi p$ and ($pp$,$p\bar{p}$) total cross-sections obtained with the same input. We show that present and planned experiments at LHC can differentiate between different models, all of which are consistent with presently available (lower...Go to contribution page
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Mr Mikael Kuusela (Helsinki Institute of Physics)LHC and post-LHCClose to one half of the LHC events are expected to be due to elastic or inelastic diffractive scattering. Still, predictions based on extrapolations of experimental data at lower energies differ by large factors in estimating the relative rate of diffractive event categories at the LHC energies. Measurement of inelastic activity, such as multiplicity and energy flows, in forward and...Go to contribution page
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Prof. Ivan Schmidt (Universidad Tecnica Federico Santa Maria, Valparaiso, Chile)SaturationColliding nuclei consist of nucleons with a shifted scale, which makes such a medium more opaque for dipoles. Therefore J/Psi will be more suppressed than predicts a simple extrapolation from pA to AA. Another effect is an enhanced color transparency. A ccbar dipole propagates simultaneously through both colliding nuclei. Due to color filtering one nucleus absorbs dipoles of larger size, and...Go to contribution page
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Prof. Senta Greene (Vanderbilt)One of the overarching goals of the experimental program at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory is an exploration of the production and properties of the hot and dense matter produced in high energy heavy ion collisions. In this talk, I present a selection of the latest results from the heavy ion program from the PHENIX collaboration at RHIC.Go to contribution page
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Dr Murad Sarsour (Georgia State University)The polarized p+p collisions at RHIC, while complementary to deep inelastic lepton scattering experiments, offer distinct advantages for the determination of the helicity preferences of gluons. The PHENIX experiment has been measuring the double longitudinal spin asymmetry of several inclusive probes to understand the gluon polarization in the allowed kinematic range. A brief overview is given...Go to contribution page
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Dr Stephen Pate (New Mexico State University)The flavor-separated polarized parton distribution functions for light quarks and anti-quarks in the proton can be studied in the production of W bosons in p+p collisions. The Ws are produced in processes like $u+\bar{d}\rightarrow W^+$ and $\bar{u}+\d \rightarrow W^-$ and we observe the lepton (an electron or muon) from the decay channel $W^{+\-}\rightarrow l^{+\-}\nu$. The electron energy...Go to contribution page
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Dr sebastian white (Brookhaven National Lab)The measurement of forward neutrons and photons is a common feature of all RHIC experiments. It was motivated by the role of forward neutrons in event characterization and in accessing diffractive phenomena in nuclear collisions. In pp collisions at RHIC measurement of forward neutrons has been useful: since ~40% of the time the leading baryon in a non-diffractive collision is a neutron,...Go to contribution page
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Dr Roman Ryutin (IHEP, Protvino)LHC and post-LHCWe discuss a possibility of an experiment at the LHC with leading neutrons production (charge exchange and double charge exchange processes). The latter could be used to extract from it $\pi^+ p$ and $\pi^+\pi^+$ cross-sections. In this work we give some estimates for the cases of total, elastic and inclusive di-jet cross-sections and discuss related problems and prospects. All the steps from...Go to contribution page
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Prof. URI MAOR (Tel Aviv University)Updated formulations of the soft Pomeron, in which $s$ and $t$ channel unitarity screenings are included, are reviewed. The consequent soft total, elastic, diffractive and inclusive cross sections are explored. Calculations of the gap survival probability, which is critical to hard diffractive processes, are presented. The interplay between theory and and data analysis is discussed. A...Go to contribution page
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Dr Oleg Kouznetsov (CEA Saclay)The high energies polarized muon beams available at CERN, and the option of using either positive or negative ones, give to the COMPASS experiment an excellent opportunity for studying Generalized Parton Distributions (GPD), through Deeply Virtual Compton Scattering (DVCS). The GPD formalism provides a link between the transverse position and the momentum distributions of partons inside the...Go to contribution page
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Prof. Jacques Soffer (Temple University, Philadelphia, PA, USA)Diffraction in DISWe first recall some recent successful predictions obtained from the statistical approach of the parton distributions for unpolarized and polarized both in Deep Inelastic Scattering and hadronic collisions. The statistical approach has been extended to the interesting situation where the PDF have, in addition to the usual Bjorken $x$ dependence, an explicit $k_T$ transverse momentum...Go to contribution page
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Igor Cherednikov (INFN Cosenza)Diffraction in DISto be advisedGo to contribution page
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Dmitry Svirida (ITEP)Talk at plenary sessionTo be advisedGo to contribution page
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Dr Abdellah Ahmidouch (North Carolina A&T State University)The Spin Asymmetry on the Nucleon Experiment (SANE) at Jefferson Lab measures spin observables A1p, A2p and structure functions g1p and g2p over a broad range of Bjorken scaling variable x from 0.3 to 0.8, for four-momentum transfers from 2.5 GeV^2 to 6.5 GeV^2. Inclusive double spin asymmetries were measured by scattering 4.7 and 5.9-GeV longitudinally polarized electron beam off a...Go to contribution page
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David Salek (IPNP, Charles University, Prague)Diffraction in DISWe study the scaling properties in deep inelastic scattering using the most recent combined structure function data F2 from the H1 and ZEUS collaborations. We also perform a direct fit to the F2 data inspired by the scaling properties.Go to contribution page
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Prof. M.Beatriz Gay Ducati (Universidade Federal do Rio Grande do Sul- UFRGS)The single diffractive production of the Standard Model Higgs boson is computed using the diffractive factorization formalism, taking into account a parametrization for the Pomeron structure function provided by the H1 Collaboration. we compute the cross sections at NLO accuracy for the gluon fusion process, since it is the leading mechanism to the Higgs boson production. The gap survival...Go to contribution page
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Dr Roman Pasechnik (Uppsala University)Diffraction in DISWe construct a QCD-based model where soft gluon rescattering between final state partons in deep inelastic scattering leads to events with large rapidity gaps and a leading proton. The model successfully describes the precise HERA data on the diffractive deep inelastic structure function in the whole available kinematical range. Further developments and applications of the model are discussed.Go to contribution page
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Alexey Prokudin (JLab)Future facility, Elctron Ion Collider, will provide a unique opportunity to reveal three dimentional structure of the proton. The spin structure of the proton can be described by 8 Transverse Momentum Dependent distribution functions at leading twist. Properties of TMDs, EIC measurements and prospects are discussed.Go to contribution page
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Valery Khoze (IPPP, Durham)We discuss the ongoing studies by the Durham group on central exclusive production processes Detailed comparison with the existing Tevatron data on quarkonium production are performed and predictions for RHIC and LHC are given.Go to contribution page
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Nikolai Zotov (SINP)We investigate the prompt photon photoproduction at HERA within the framework of $k_T$-factorization QCD approach. Our consideration is based on the off-shell matrix elements for the underlying partonic subprocesses. The unintegrated parton densities in a proton and in a photon are determined using the Kimber-Martin-Ryskin (KMR) prescription. Additionally, we use the CCFM-evolved...Go to contribution page
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Dr Martin Poghosyan (TO)LHC and post-LHCProton–proton collisions are being studied with the ALICE detector not only as a benchmark for the comparison with heavy-ion reactions, but also as a means to study important aspects of pp physics in the new energy domain provided by the LHC. In this contribution ALICE results on general characteristics of pp interactions at sqrt(s) = 0.9, 2.36 and 7 TeV will be reported and their potential...Go to contribution page
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Giovanni Antonio Chirilli (Cpht-Polytechnique & LPT d'Orsay)To study the scattering amplitudes at the high-energy, the T-product of two currents can be expanded in terms of coefficient functions (impact factors) and matrix elements of ``composite color dipoles'' made of Wilson line with rapidity cutoff preserving conformal invariance. In the leading order, the high-energy evolution of color dipoles is governed by the non-linear...Go to contribution page
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Dr Bernhard Musch (Jefferson Lab)Diffraction in DISTransverse momentum dependent parton distribution functions (TMDs) provide a framework to study the spin-dependent motion of quarks inside the nucleon. They are relevant for our understanding of azimuthal asymmetries in, e.g., semi-inclusive DIS. We present lattice calculations of TMDs based on spacially separated quark operators connected by a gauge link. Studies with straight gauge links...Go to contribution page
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Prof. Konstantin Goulianos (The Rockefeller University)Results on factorization breaking in soft and hard hadron-hadron collisions, photo-production and deep inelastic scattering are shown to exhibit a universal behavior in a (renormalization) model where diffraction is mediated by a saturated colorless exchange with vacuum quantum numbers. Formulas for cross sections and final state event properties are obtained, and a scheme is proposed for...Go to contribution page
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George Igo (University of California Los Angeles)The production of W bosons in longitudinally polarized p+p collisions at RHIC provides a new means of studying the spin-flavor asymmetries of the proton sea quark distributions. W bosons are produced in \bar u+d(\bar d u) collisions and can be detected through their leptonic decays where only the charged lepton is detected. Precise tracking information, provided by the STAR Time...Go to contribution page
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