Exclusive vector meson production at HERA
- 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, Vol. 1523, Issue 1; Conference: DIFFRACTION 2012: International workshop on diffraction in high energy physics, Lanzarote, Canary Islands (Spain), 10-15 Sep 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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