Measurement of azimuthal hadron asymmetries in semi-inclusive deep inelastic scattering off unpolarised nucleons

2014/01/24 by C. Adolph, R. Akhunzyanov, M. G. Alekseev +218 · 1 citation
Physics and Astronomy · #hep-ex

paper · pdf · doi:10.1016/j.nuclphysb.2014.07.019

33 pages, 15 figures and 10 pages

arxiv created 2014/01/24 · arxiv updated 2015/06/18

Abstract

Spin-averaged asymmetries in the azimuthal distributions of positive and negative hadrons produced in deep inelastic scattering were measured using the CERN SPS muon beam at 160 GeV/c and a ⁶LiD target. The amplitudes of the three azimuthal modulations cosϕ_h, cos2ϕ_h and sinϕ_h were obtained binning the data separately in each of the relevant kinematic variables x, z or p_T ^h and binning in a three-dimensional grid of these three variables. The amplitudes of the cos ϕ_h and cos 2ϕ_h modulations show strong kinematic dependencies both for positive and negative hadrons.

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