Journal article
The ZEUS Leading Proton Spectrometer and its use in the measurement of elastic $ho^0$ photoproduction at HERA
Zeitschrift für Physik. C, Particles and fields, Vol.73(2), pp.253-268
01/01/1997
DOI: 10.1007/s002880050314
Abstract
The differential cross section dσ/dt for elastic ρ0 photoproduction, γp → ρ0p (ρ0 → π+π−), has been measured in ep interactions at HERA. The squared four-momentum exchanged at the proton vertex, t, has been determined directly by measuring the momentum of the scattered proton using the ZEUS Leading Proton Spectrometer (LPS), a large scale system of silicon micro-strip detectors operating close to the HERA proton beam. The LPS allows the measurement of the momentum of high energy protons scattered at small angles with accuracies of 0.4% for the longitudinal momentum and 5 MeV for the transverse momentum. Photoproduction of ρ0 mesons has been investigated in the interval 0.073 < ¦t¦< 0.40 GeV2, for photon virtualities Q2 < 1 GeV2 and photon-proton centre-of-mass energies W between 50 and 100 GeV. In the measured range, the t distribution exhibits an exponential shape with a slope parameter b = 9.8 ± 0.8 (stat.) ±1.1 (syst.) GeV−2. The use of the LPS eliminates the contamination from events with diffractive dissociation of the proton into low mass states.
Details
- Title: Subtitle
- The ZEUS Leading Proton Spectrometer and its use in the measurement of elastic $ho^0$ photoproduction at HERA
- Creators
- ZEUS CollaborationJ Repond (Contributor) - Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- Zeitschrift für Physik. C, Particles and fields, Vol.73(2), pp.253-268
- DOI
- 10.1007/s002880050314
- ISSN
- 0170-9739
- eISSN
- 1431-5858
- Language
- English
- Date published
- 01/01/1997
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984627283202771
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