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Measurement of high-Q (2) charged current deep inelastic scattering cross sections with a longitudinally polarised positron beam at HERA

By H. Abramowicz, I. Abt, L. Adamczyk, M. Adamus, R. Aggarwal, S. Antonelli, P. Antonioli, A. Antonov, M. Arneodo, V. Aushev, Y. Aushev, O. Bachynska, A. Bamberger, A. N. Barakbaev, G. Barbagli, G. Bari, F. Barreiro, D. Bartsch, M. Basile, O. Behnke, J. Behr, U. Behrens, L. Bellagamba, A. Bertolin, S. Bhadra, M. Bindi, C. Blohm, V. Bokhonov, T. Bold, E. G. Boos, K. Borras, D. Boscherini, S. K. Boutle, I. Brock, E. Brownson, R. Brugnera, N. Bruemmer, A. Bruni, G. Bruni, B. Brzozowska, P. J. Bussey, J. M. Butterworth, B. Bylsma, A. Caldwell, M. Capua, R. Carlin, C. D. Catterall, S. Chekanov, J. Chwastowski and A. Pellegrino

Abstract

Measurements of the cross sections for charged current deep inelastic scattering in e (+) p collisions with a longitudinally polarised positron beam are presented. The measurements are based on a data sample with an integrated luminosity of 132 pb(-1) collected with the ZEUS detector at HERA at a centre-of-mass energy of 318 GeV. The total cross section is presented at positive and negative values of the longitudinal polarisation of the positron beams. The single-differential cross-sections d sigma/dQ (2), d sigma/dx and d sigma/dy are presented for Q (2)> 200 GeV2. The reduced cross-section is presented in the kinematic range 200 <Q (2)<60 000 GeV2 and 0.006 <x <0.562. The measurements agree well with the predictions of the Standard Model. The results are used to determine a lower limit on the mass of a hypothetical right-handed W boson

Topics: CENTRAL TRACKING DETECTOR, ZEUS BARREL CALORIMETER, LEFT-RIGHT SYMMETRY, LUND MONTE-CARLO, PARTON DISTRIBUTIONS, QCD ANALYSIS, PROTON COLLISIONS, JET FRAGMENTATION, EVENT GENERATOR, EP INTERACTIONS
Year: 2010
DOI identifier: 10.1140/epjc/s10052-010-1498-9
OAI identifier:
Provided by: NARCIS
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