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Markus DIEHL (DESY)07/04/2008, 16:20Diffraction and Vector Mesons
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Dr Paul Newman (Birmingham University)07/04/2008, 16:40Diffraction and Vector MesonsSelected experimental diffractive results from the ongoing HERA-LHC workshop are presented, together with details of what is planned for the closing meeting in May. The main emphasis will be to illustrate clearly the areas where further information from HERA is most needed.Go to contribution page
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Marta RUSPA (Univ Piemonte Orientale)07/04/2008, 17:00Diffraction and Vector MesonsThe diffractive dissociation of virtual photons, gamma*p -> X p, has been measured with the ZEUS detector in e+p collisions at HERA. Events were selected either by requiring a large rapidity gap between the system X and the outgoing proton, or by tagging the outgoing proton, or by exploiting the different distribution of the the mass of the system X for diffractive and non diffractive...Go to contribution page
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Lorenzo Rinaldi (INFN, Sezione di Bologna-Universita & INFN, Bologna)07/04/2008, 17:25Diffraction and Vector MesonsThe semi-inclusive reaction ep->eXp, with a final-state proton carrying a large fraction of the incoming proton energy, xL>0.32, and trasverse-momentum squared pT^2<0.5 GeV^2, was studied with the ZEUS detector at HERA for exchnged photon virtualities Q^2>3 GeV^2 and mass of the photon-proton system 45<W<225 GeV, using an integrated luminosity of 12.8pb-1. Leading-proton production cross...Go to contribution page
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07/04/2008, 17:45
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Paul James Laycock (Oliver Lodge Laboratory-University of Liverpool)08/04/2008, 09:00Diffraction and Vector MesonsDifferential dijet cross sections in diffractive deep-inelastic scattering are measured with the H1 detector at HERA using an integrated luminosity of 51.5 pb-1. The selected events are of the type ep --> eXY, where the system X contains at least two jets and is well separated in rapidity from the low mass proton dissociation system Y. The dijet data are compared with QCD predictions at...Go to contribution page
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Wojtek Slominski08/04/2008, 09:20Diffraction and Vector MesonsThe recent results on diffractive dijet production measured with the ZEUS detector in ep collisions at HERA, are presented. Two sets of data, corresponding to highly virtual (DIS) and nearly real photon (PHP), are shown. The results are compared to the NLO QCD predictions with the emphasis on possible observation of the factorisation breaking for soft photons. The uncertainties of 20-30%...Go to contribution page
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Karel Cerny (Charles University in Prague)08/04/2008, 09:45Diffraction and Vector Mesons
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Krzysztof Golec-Biernat (Institute of Nuclear Physics, Cracow)08/04/2008, 10:10Diffraction and Vector Mesons
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Kirill Tuchin (Iowa State University/RBRC)08/04/2008, 11:10Diffraction and Vector MesonsWe calculate multiplicity and spectrum of diffractively produced gluons in onium-nucleus collisions which include the low-x evolution in all rapidity intervals. We demonstrate that the diffractive gluon production exhibits a characteristic dependence on energy, rapidity, transverse momentum and atomic number that opens a new avenue towards the phenomenological applications in eA and...Go to contribution page
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Leszek Motyka (Hamburg University)08/04/2008, 11:30Diffraction and Vector MesonsThe scattering of a baryon consisting of three massive quarks is investigated in the high energy limit of perturbative QCD. We derive the elastic impact factors for 2, 3 and 4 gluons, and study the energy evolution of the corresponding elastic scattering amplitudes. We find that the baryon couples to the BFKL Pomeron, the BKP odderon and a new BKP Pomeron state composed of three...Go to contribution page
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Leszek Motyka (Hamburg University)08/04/2008, 11:50Diffraction and Vector MesonsThe $J/\psi$ and $\Upsilon$ production in high energy proton-proton and proton-antiproton collisions is studied. Estimates are presented of the odderon-Pomeron and photon-Pomeron contributions to these production processes at the Tevatron and at the LHC. Differences between the kinematical distributions of the produced mesons are pointed out that should allow to distinguish between...Go to contribution page
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Alessandro Papa (Univ. Calabria & INFN-Cosenza)08/04/2008, 12:10Diffraction and Vector MesonsWe show that the use of a collinearly BFKL kernel in the NLA amplitude for the electroproduction of two light vector mesons leads to a smooth behavior of the amplitude with the center-of-mass energy, both for equal and strongly ordered photons' virtualities. Moreover, the optimal values of the energy scales appearing in the subleading terms turn out to be closer to the kinematical...Go to contribution page
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Dr Agustin Sabio Vera (CERN)08/04/2008, 12:30A review on how to phenomenologically extract information about conformal spins of the BFKL formalism will be provided. The focus will be on signatures at hadron-hadron and lepton-hadron collidersGo to contribution page
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Konstantin Goulianos (The Rockefeller University)08/04/2008, 14:00Diffraction and Vector MesonsWe report preliminary CDF~II single diffractive W/Z and final exclusive dijet production results from $\bar pp$ collisions at $\sqrt{s}=1.96$~TeV at the Fermilab Tevatron. The results are compared with theoretical expectations and the measured exclusive dijet cross sections are used to check models for exclusive Higgs boson production at the Large Hadron Collider.Go to contribution page
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James Pinfold (Department of Physics)08/04/2008, 14:20Diffraction and Vector MesonsWe report on the search for exclusive interactions at CDF-II . These interactions include two photon production of e+e- and mu+mu- final states, doubly diffractive production of a photon-photon final state, and, production of the J/Psi and the Psi-prime via gamma-pomeron fusion.Go to contribution page
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Severine Ovyn (Institut de Physique Nucleaire)08/04/2008, 14:40Diffraction and Vector MesonsExclusive production of dileptons with no significant additional activity in the CMS detector occurs with high cross section in gamma-mediated processes at the LHC. Selecting events with a single back-to-back $\mu^{+}\mu^{-}$ or $e^{+}e^{-}$ pair provides a high-statistics calibration sample, e.g. for luminosity measurements and aligment of forward proton detectors. Photoproduction of...Go to contribution page
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Dr Antonio Vilela Pereira (University of Turin)08/04/2008, 15:00Diffraction and Vector MesonsWe present a study of single-diffractive $W$-boson production in $pp$ collisions at $\sqrt{s}=14$~TeV, $pp \to Xp$ with $X$ including a $W$ boson, with the CMS detector. We discuss the feasibility of observing this process with an integrated effective luminosity for single interactions of 100~pb$^{-1}$.Go to contribution page
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Oldrich Kepka (Centre d'Etudes de Saclay (CEN Saclay))08/04/2008, 15:20Diffraction and Vector Mesons
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Jeremy Miller (Tel Aviv University)08/04/2008, 16:10Diffraction and Vector Mesons
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Joakim Nystrand (Department of Physics and Technology)08/04/2008, 16:25Diffraction and Vector MesonsExclusive photoproduction of vector mesons have been studied in electron-proton and electron-nucleus interactions, for example at HERA, and lately also in heavy-ion collisions at the Relativistic Heavy-Ion Collider (RHIC) at BNL[1,2]. Mid-rapidity photoproduction of heavy vector mesons in proton-proton and nucleus-nucleus collisions at RHIC and the Large Hadron Collider at CERN is a...Go to contribution page
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Muriel Vander Donckt (CERN)08/04/2008, 16:45Diffraction and Vector Mesons
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Dr Marek Tasevsky (Physics Institute Prague)08/04/2008, 17:05Diffraction and Vector Mesons
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Valery Khoze (Science Laboratories)08/04/2008, 17:20Diffraction and Vector MesonsWe show how the early data runs of the LHC can provide valuable checks of the different components of the formalism used to predict the cross sections of central exclusive processes.Go to contribution page
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Jeffrey Forshaw (University of Manchester)08/04/2008, 17:40Diffraction and Vector MesonsThe simplest supersymmetric model that solves the mu-problem and in which the GUT-scale parameters need not be finely tuned in order to predict the correct value of the Z boson mass is the Next-to-Minimal Supersymmetric Standard Model (NMSSM). However, in order that fine-tuning be absent, the lightest CP-even Higgs boson h should have mass around 100 GeV and SM couplings to gauge ...Go to contribution page
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Laurent Favart (Universite Libre de Bruxelles)09/04/2008, 11:10Diffraction and Vector MesonsA measurement of elastic deeply virtual Compton scattering gamma* p -> gamma p using e-p collision data recorded with the H1 detector at HERA is presented. The analysed data sample corresponds to an integrated luminosity of 145 pb^-1. The cross section is measured as a function of the virtuality Q^2 of the exchanged photon and the centre-of-mass energy W of the gamma*p system in the kinematic...Go to contribution page
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Xavier Janssen (Universite Libre de Bruxelles (ULB))09/04/2008, 11:30Diffraction and Vector Mesons
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Justyna Ukleja (Penn State University)09/04/2008, 11:55Diffraction and Vector MesonsThe exclusive electroproduction of rho, gamma*p -> rho0 p, has been studied with the ZEUS detector at HERA for the virtualities exchanged photon in range 2<Q^2<160 GeV^2, the photon-proton centre-of-mass energy 32<W<180 GeV^2. The cross sections are presented as a function of Q^2 and W. The helicity analysis of the decay-matrix elements of rho0 was used to study the ratio of the gamma* p...Go to contribution page
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Janusz Malka (Univ of Lodz)09/04/2008, 12:15Diffraction and Vector Mesons
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Graeme Watt09/04/2008, 12:30Diffraction and Vector Mesons
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