Transverse spin effects in hadron-pair production from semi-inclusive deep inelastic scattering

By T. C. C. A. Alekseev, et al. 2009

500 citations recorded by the source corpus.

Abstract First measurements of azimuthal asymmetries in hadron-pair production in deep-inelastic scattering of muons on transversely polarised LiD 6 (deuteron) and NH3 (proton) targets are presented. The data were taken in the years 2002–2004 and 2007 with the COMPASS spectrometer using a muon beam of 160 GeV/c at the CERN SPS. The asymmetries provide access to the transversity distribution functions, without involving the Collins effect as in single hadron production. The sizeable asymmetries measured on the NH3 target indicate non-vanishing u-quark transversity and two-hadron interference fragmentation functions. The small asymmetries measured on the LiD 6 target can be interpreted as indication for a cancellation of u- and d-quark transversities.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/85b44e5df3229bf46ebfb449ae31e8af33f26f88

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In Nuclear and High Energy Physics

Citations in the corpus

The role of the quark and gluon GPDs in hard vector-meson electroproduction (2007, unknown): “Data taken from COMPASS [48] and HERMES [49].”
Extraction of quark transversity distribution and Collins fragmentation functions with QCD evolution (2015, methodology): “Measurements have been made by the HERMES Collaboration [6, 7], the COMPASS Colaboration [8], and JLab HALL A [9] experiments.”
Extraction of spin-dependent parton densities and their uncertainties (2009, unknown): “We note that the COMPASS experiment has recently presented a LO extraction of the polarized strange distribution from their kaon SIDIS data [79], which are not yet included in this work.”
Light-front holographic QCD and emerging confinement (2014, background): “Finally, we would like to mention the recent precision measurement at COMPASS [210] which found a new resonance named the a1(1420) with a mass 1.”
Hybrid Mesons (2015, unknown): “(Figure reproduced with permission from reference [158].”