Exclusive vector meson production at HERA

Journal Article · Mon Apr 15 04:00:00 EDT 2013 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4802119· OSTI ID:22116934

Szuba, Dorota ^[1]

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1. Hamburg University, Hamburg (Germany)

The exclusive photoproduction of {Upsilon} has been studied with the ZEUS detector in ep collisions at HERA. The exponential slope, b, of the |t|-dependence of the cross section, where t is the squared four-momentum transfer at the proton vertex, has been measured. This constitutes the first measurement of the |t|-dependence of the {gamma}p{yields}{Upsilon}p cross section. The differential crosssections as a function of t at lower energies of {gamma}p centre-of-mass has been studied in exclusive diffractive photoproduction of J/{psi} mesons with the H1 detector. The exclusive electroproduction of two pions has been measured by the ZEUS experiment. The two-pion invariant-mass distribution is interpreted in terms of the pion electromagnetic form factor, assuming that the studied mass range includes the contributions of the {rho}, {rho} Prime and . {rho}'' vector-meson states.

• OSTI ID: 22116934
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1523; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
ELECTROMAGNETIC FORM FACTORS
ELECTRON-PROTON INTERACTIONS
ELECTROPRODUCTION
EXCLUSIVE INTERACTIONS
FOUR MOMENTUM TRANSFER
HERA STORAGE RING
J PSI-3097 MESONS
MASS DISTRIBUTION
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PHOTON-PROTON INTERACTIONS
PHOTOPRODUCTION
PIONS
PROTONS
RESONANCE PARTICLES
REST MASS
RHO-770 MESONS
UPSILON-10580 MESONS