Markus DIEHL
(DESY)
07/04/2008, 16:20
Diffraction and Vector Mesons
Dr
Paul Newman
(Birmingham University)
07/04/2008, 16:40
Diffraction and Vector Mesons
Selected 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.
Marta RUSPA
(Univ Piemonte Orientale)
07/04/2008, 17:00
Diffraction and Vector Mesons
The 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...
Lorenzo Rinaldi
(INFN, Sezione di Bologna-Universita & INFN, Bologna)
07/04/2008, 17:25
Diffraction and Vector Mesons
The 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...
Paul James Laycock
(Oliver Lodge Laboratory-University of Liverpool)
08/04/2008, 09:00
Diffraction and Vector Mesons
Differential 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...
Wojtek Slominski
08/04/2008, 09:20
Diffraction and Vector Mesons
The 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%...
Karel Cerny
(Charles University in Prague)
08/04/2008, 09:45
Diffraction and Vector Mesons
Krzysztof Golec-Biernat
(Institute of Nuclear Physics, Cracow)
08/04/2008, 10:10
Diffraction and Vector Mesons
Kirill Tuchin
(Iowa State University/RBRC)
08/04/2008, 11:10
Diffraction and Vector Mesons
We 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...
Leszek Motyka
(Hamburg University)
08/04/2008, 11:30
Diffraction and Vector Mesons
The 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...
Leszek Motyka
(Hamburg University)
08/04/2008, 11:50
Diffraction and Vector Mesons
The $J/\psi$ 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...
Alessandro Papa
(Univ. Calabria & INFN-Cosenza)
08/04/2008, 12:10
Diffraction and Vector Mesons
We 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...
Dr
Agustin Sabio Vera
(CERN)
08/04/2008, 12:30
A 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 colliders
Konstantin Goulianos
(The Rockefeller University)
08/04/2008, 14:00
Diffraction and Vector Mesons
We 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.
James Pinfold
(Department of Physics)
08/04/2008, 14:20
Diffraction and Vector Mesons
We 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.
Severine Ovyn
(Institut de Physique Nucleaire)
08/04/2008, 14:40
Diffraction and Vector Mesons
Exclusive 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...
Dr
Antonio Vilela Pereira
(University of Turin)
08/04/2008, 15:00
Diffraction and Vector Mesons
We 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$^{-1}$.
Oldrich Kepka
(Centre d'Etudes de Saclay (CEN Saclay))
08/04/2008, 15:20
Diffraction and Vector Mesons
Jeremy Miller
(Tel Aviv University)
08/04/2008, 16:10
Diffraction and Vector Mesons
Joakim Nystrand
(Department of Physics and Technology)
08/04/2008, 16:25
Diffraction and Vector Mesons
Exclusive 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...
Muriel Vander Donckt
(CERN)
08/04/2008, 16:45
Diffraction and Vector Mesons
Dr
Marek Tasevsky
(Physics Institute Prague)
08/04/2008, 17:05
Diffraction and Vector Mesons
Valery Khoze
(Science Laboratories)
08/04/2008, 17:20
Diffraction and Vector Mesons
We 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.
Jeffrey Forshaw
(University of Manchester)
08/04/2008, 17:40
Diffraction and Vector Mesons
The 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
...
Laurent Favart
(Universite Libre de Bruxelles)
09/04/2008, 11:10
Diffraction and Vector Mesons
A 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...
Xavier Janssen
(Universite Libre de Bruxelles (ULB))
09/04/2008, 11:30
Diffraction and Vector Mesons
Justyna Ukleja
(Penn State University)
09/04/2008, 11:55
Diffraction and Vector Mesons
The 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...
Janusz Malka
(Univ of Lodz)
09/04/2008, 12:15
Diffraction and Vector Mesons
Graeme Watt
09/04/2008, 12:30
Diffraction and Vector Mesons
