Measurement of proton-dissociative diffractive photoproduction of vector mesons at large momentum transfer at HERA

Abstract

Diffractive photoproduction of vector mesons, gamma p --> V Y, where Y is a proton-dissociative system, has been measured in ep interactions with the ZEUS detector at HERA using an integrated luminosity of 25 pb^-1. The differential cross section, ds/dt, is presented for -t<12 GeV^2, where t is the square of the four-momentum transferred to the vector meson. The data span the range in photon-proton centre-of-mass energy, W, from 80 GeV to 120 GeV. The t distributions are well fit by a power law, ds/dt ~ (-t)^{-n}. The slope of the Pomeron trajectory, measured from the W dependence of the rho^0 and phi cross sections in bins of t, is consistent with zero. The ratios ds_(gamma p --> phi Y)/dt to ds_(gamma p --> rho^0 Y)/dt and ds_(gamma p --> J/psi Y)/dt to ds_(gamma p --> rho^0 Y)/dt increase with increasing -t. Decay-angle analyses for rho^0, phi and J/psi mesons have been carried out. For the rho^0 and phi mesons, contributions from single and double helicity flip are observed. The results are compared to expectations of theoretical models.

44 pages, 17 figures, to be submitted to The European Physical Journal

Cited by in corpus (53)

• The Physics of Ultraperipheral Collisions at the LHC
• Elastic J/Psi Production at HERA
• Evidence of strong proton shape fluctuations from incoherent diffraction
• Imprints of fluctuating proton shapes on flow in proton-lead collisions at the LHC
• Revealing proton shape fluctuations with incoherent diffraction at high energy
• Diffractive Electroproduction of rho and phi Mesons at HERA
• Diffractive Vector Meson Production at HERA: from Soft to Hard QCD
• The FP420 R&D Project: Higgs and New Physics with forward protons at the LHC
• Confronting impact parameter dependent JIMWLK evolution with HERA data
• Paving the Way Towards Precision Physics in Saturation Studies Through Exclusive Diffractive Light Neutral Vector Meson Production
• The Hadronic Final State at HERA
• The smallest fluid on earth
• Relativistic corrections to the vector meson light front wave function
• Diffractive Photoproduction of J/psi Mesons with Large Momentum Transfer at HERA
• A lattice calculation of vector meson couplings to the vector and tensor currents using chirally improved fermions
• Bayesian inference of the fluctuating proton shape
• Diffractive Photoproduction of Rho Mesons with Large Momentum Transfer at HERA
• Progress and Challenges in Small Systems
• Vector Meson Photoproduction from the BFKL Equation I: Theory
• Measurement of inelastic J/psi production in deep inelastic scattering at HERA
• Vector Meson Photoproduction from the BFKL Equation II: Phenomenology
• Selected topics in diffraction with protons and nuclei: past, present, and future
• Proton hot spots and exclusive vector meson production
• Measurement of J/psi photoproduction at large momentum transfer at HERA
• Large t diffractive J/ψphotoproduction with proton dissociation in ultraperipheral pA collisions at LHC
• Diffractive incoherent vector meson production off protons: a quark model approach to gluon fluctuation effects
• Elastic and large t rapidity gap vector meson production in ultraperipheral proton-ion collisions
• Investigating the structure of gluon fluctuations in the proton with incoherent diffraction at HERA
• Geometric scaling in exclusive processes
• Subprocess Size in Hard Exclusive Scattering
• Diffractive $J/\Psi$ photoproduction at large momentum transfer in coherent hadron - hadron interactions at CERN LHC
• High Energy Photoproduction
• Diffractive vector meson production at large-$t$ in coherent hadronic interactions at CERN LHC
• A Study of the Gluon Ladder in Diffractive Processes
• Measurement of Diffractive Scattering of Photons with Large Momentum Transfer at HERA
• High energy muons in extensive air showers
• Comments on the Relativity of Shape
• High $|t|$ diffractive vector meson production at the EIC
• DGLAP versus perturbative Pomeron in large momentum transfer hard diffractive processes at HERA and LHC
• Vector meson production at HERA
• Complete calculation of exclusive heavy vector meson production at next-to-leading order in the dipole picture
• BFKL Pomeron loop contribution in diffractive photoproduction and inclusive hadroproduction of $J/\psi$ and ${\rm Y}$
• Testing the dynamics of high energy scattering using vector meson production
• Probing the BFKL dynamics in the Vector Meson Photoproduction at large -- $t$ in $pPb$ collisions at the CERN LHC
• Effective Field Theory Factorization for Diffraction
• Photoproduction of $J/\psi$ in d+Au ultraperipheral collisions at the BNL Relativistic Heavy Ion Collider
• Diffractive large transferred momentum photoproduction of vector mesons
• Semi-exclusive DVCS
• The energy dependence of the hard exclusive diffractive processes in pQCD as the function of momentum transfer
• Measurement of Diffractive Scattering of Photons with Large Momentum Transfer at HERA
• Gluon imaging using azimuthal correlations in diffractive scattering at the Electron-Ion Collider
• Vector meson production and inclusive KsKs final state at HERA
• HERA results on the structure of the proton