Deeply virtual Compton scattering, gamma*p -> gamma p, has been measured in e(+)p collisions at HERA with the ZEUS detector using an integrated luminosity of 61.1 pb(-1). Cross sections are presented as a function of the photon virtuality, Q(2), and photon-proton centre-of-mass energy, W, for a wide region of the phase space, Q(2) > 1.5GeV(2) and 40 < W < 170GeV. A subsample of events in which the scattered proton is measured in the leading proton spectrometer, corresponding to an integrated luminosity of 31.3 pb(-1), is used for the first direct measurement of the differential cross section as a function of t, where t is the square of the four-momentum transfer at the proton vertex.

A measurement of the Q(2), W and t dependences of deeply virtual Compton scattering at HERA

CIRIO, Roberto;COSTA, Marco;FERRERO, Maria Italia;MONACO, Vincenzo;PERONI, Cristiana;SACCHI, Roberto;SOLA, VALENTINA;SOLANO, Ada Maria;
2009-01-01

Abstract

Deeply virtual Compton scattering, gamma*p -> gamma p, has been measured in e(+)p collisions at HERA with the ZEUS detector using an integrated luminosity of 61.1 pb(-1). Cross sections are presented as a function of the photon virtuality, Q(2), and photon-proton centre-of-mass energy, W, for a wide region of the phase space, Q(2) > 1.5GeV(2) and 40 < W < 170GeV. A subsample of events in which the scattered proton is measured in the leading proton spectrometer, corresponding to an integrated luminosity of 31.3 pb(-1), is used for the first direct measurement of the differential cross section as a function of t, where t is the square of the four-momentum transfer at the proton vertex.
2009
05
108
-
http://dx.doi.org/10.1088/1126-6708/2009/05/108
High Energy Physics; HERA; ZEUS Collaboration
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/68746
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