The photon-proton total cross section has been measured in the process e(+)p --> e(+)gammap --> e(+)X with the ZEUS detector at HERA. Events were collected with photon virtuality Q(2) < 0.02 GeV(2) and average gammap center-of-mass energy W(gammap) = 209 GeV in a dedicated run, designed to control systematic effects, with an integrated luminosity of 49 nb(-1). The measured total cross section is sigma(tot)(gammap) = 174 +/- 1 (stat.) +/- 13 (syst.) mub. The energy dependence of the cross section is compatible with parameterizations of high-energy p (p) over bar and p data. (C) 2002 Elsevier Science B.V. All rights reserved.

Measurement of the photon-proton total cross section at a center-of-mass energy of 209 GeV at HERA

CIRIO, Roberto;COSTA, Marco;MONACO, Vincenzo;PERONI, Cristiana;SACCHI, Roberto;SOLANO, Ada Maria;
2002-01-01

Abstract

The photon-proton total cross section has been measured in the process e(+)p --> e(+)gammap --> e(+)X with the ZEUS detector at HERA. Events were collected with photon virtuality Q(2) < 0.02 GeV(2) and average gammap center-of-mass energy W(gammap) = 209 GeV in a dedicated run, designed to control systematic effects, with an integrated luminosity of 49 nb(-1). The measured total cross section is sigma(tot)(gammap) = 174 +/- 1 (stat.) +/- 13 (syst.) mub. The energy dependence of the cross section is compatible with parameterizations of high-energy p (p) over bar and p data. (C) 2002 Elsevier Science B.V. All rights reserved.
2002
627
3
28
http://dx.doi.org/10.1016/S0550-3213(02)00068-8
ZEUS; CENTRAL TRACKING DETECTOR; ZEUS BARREL CALORIMETER; LOW X; PARTON DISTRIBUTIONS; INELASTIC SCATTERING; EVENT GENERATOR; LOW Q(2); PHOTOPRODUCTION; CONSTRUCTION; DESIGN
S. Chekanov;M. Derrick;D. Krakauer;S. Magill;B. Musgrave;A. Pellegrino;J. Repond;R. Yoshida;M. C. K.;P. Antonioli;G. Bari;M. Basile;L. Be...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/105151
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