The exclusive photoproduction reaction gamma p -> gamma(1S)p has been studied with the ZEUS detector in ep collisions at HERA using an integrated luminosity of 468 pb(-1). The measurement covers the kinematic range 60 < W < 220 GeV and Q(2) < 1 GeV2, where W is the photon-proton centre-of-mass energy and Q(2) is the photon virtuality. 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, yielding b = 4.3(-1.3)(+2.0)(stat.)(-0.6)(+0.5) (syst.) GeV-2. This constitutes the first measurement of the t dependence of the gamma p -> gamma(1S)p cross section.

H. ABRAMOWICZ, I. ABT, L. ADAMCZYK, M. ADAMUS, R. AGGARWA, S. ANTONELLI, et al. (2012). Measurement of the t dependence in exclusive photoproduction of Upsilon(1S) mesons at HERA. PHYSICS LETTERS. SECTION B, 708, 14-20 [10.1016/j.physletb.2012.01.009].

Measurement of the t dependence in exclusive photoproduction of Upsilon(1S) mesons at HERA.

BASILE, MAURIZIO;CIFARELLI, LUISA;CONTIN, ANDREA;SARTORELLI, GABRIELLA;
2012

Abstract

The exclusive photoproduction reaction gamma p -> gamma(1S)p has been studied with the ZEUS detector in ep collisions at HERA using an integrated luminosity of 468 pb(-1). The measurement covers the kinematic range 60 < W < 220 GeV and Q(2) < 1 GeV2, where W is the photon-proton centre-of-mass energy and Q(2) is the photon virtuality. 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, yielding b = 4.3(-1.3)(+2.0)(stat.)(-0.6)(+0.5) (syst.) GeV-2. This constitutes the first measurement of the t dependence of the gamma p -> gamma(1S)p cross section.
2012
H. ABRAMOWICZ, I. ABT, L. ADAMCZYK, M. ADAMUS, R. AGGARWA, S. ANTONELLI, et al. (2012). Measurement of the t dependence in exclusive photoproduction of Upsilon(1S) mesons at HERA. PHYSICS LETTERS. SECTION B, 708, 14-20 [10.1016/j.physletb.2012.01.009].
H. ABRAMOWICZ; I. ABT; L. ADAMCZYK; M. ADAMUS; R. AGGARWA; S. ANTONELLI; P. ANTONIOLI; A. ANTONOV; M. ARNEODO; V. AUSHEV; Y. AUSHEV; O. BACHYNSKA; A. ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/118589
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