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Proceedings of XXI International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS 2013)

DOI: 10.22323/1.191.0286

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Production of Z0 bosons in elastic and quasi-elastic ep collisions at HERA

Journal article published in 2013 by A. F. ̇ Zarnecki, H. Abramowicz, Collaboration Zeus, I. Abt, L. Adamczyk, M. Adamus, R. Aggarwal ORCID, S. Antonelli, P. Antonioli, A. Antonov, M. Arneodo, O. Arslan, V. Aushev, Y. Aushev, O. Bachynska and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

The production of Z(0) bosons in the reaction ep -> eZ(0)p((*)), where p((*)) stands for a proton or a low-mass nucleon resonance, has been studied in ep collisions at HERA using the ZEUS detector. The analysis is based on a data sample collected between 1996 and 2007, amounting to 496 pb(-1) of integrated luminosity. The Z(0) was measured in the hadronic decay mode. The elasticity of the events was ensured by a cut on eta(max) eZ(0)p((*)) was measured to be sigma(ep -> eZ(0)p((*))) = 0.13 +/- 0.06(stat.) +/- 0.01(syst) pb, in agreement with the Standard Model prediction of 0.16 pb. Thfs is the first measurement of Z(0) production in ep collisions. (C) 2012 Elsevier B.V. All rights reserved.