Final COMPASS results on the deuteron spin-dependent structure function g(1) (d) and the Bjorken sum rule

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dc.contributor.authorŠulc Miroslavcs
dc.date.accessioned2018-09-25T12:18:20Z
dc.date.available2018-09-25T12:18:20Z
dc.date.issued2017cs
dc.description.abstractFinal results are presented from the inclusive measurement of deep-inelastic polarised-muon scattering on longitudinally polarised deuterons using a 6LiD target. The data were taken at 160 GeV beam energy and the results are shown for the kinematic range in photon virtuality, in the Bjorken scaling variable and in the mass of the hadronic final state. The deuteron double-spin asymmetry and the deuteron longitudinal-spin structure function are presented in bins of x and . Towards lowest accessible values of x, decreases and becomes consistent with zero within uncertainties. The presented final values together with the recently published final values of COMPASS are used to again evaluate the Bjorken sum rule and perform the QCD fit to the world data at next-to-leading order of the strong coupling constant. In both cases, changes in central values of the resulting numbers are well within statistical uncertainties. The flavour-singlet axial charge , which is identified in the renormalisation scheme with the total contribution of quark helicities to the nucleon spin, is extracted at next-to-leading order accuracy from only the COMPASS deuteron data: . Together with the recent results on the proton spin structure function , the results on constitute the COMPASS legacy on the measurements of through inclusive spin-dependent deep inelastic scattering.
dc.format.extent8cs
dc.identifier.doi10.1016/j.physletb.2017.03.018
dc.identifier.issn0370-2693cs
dc.identifier.urihttps://dspace.tul.cz/handle/15240/31798
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S037026931730196X?via%3Dihub
dc.language.isoengcs
dc.publisherElsevier BVcs
dc.relation.ispartofPhysics Letters B
dc.relation.ispartofseries0cs
dc.relation.urihttps://api.elsevier.com/content/article/eid/1-s2.0-S037026931730196Xcs
dc.subjectCOMPASScs
dc.subjectDeep inelastic scatteringcs
dc.subjectParton helicity distributionscs
dc.subjectSpincs
dc.subjectStructure functioncs
dc.titleFinal COMPASS results on the deuteron spin-dependent structure function g(1) (d) and the Bjorken sum ruleen
dc.titleFinal COMPASS results on the deuteron spin-dependent structure function g(1) (d) and the Bjorken sum rulecs
local.citation.epage34-41cs
local.citation.spage34-41cs
local.identifier.publikace5267
local.identifier.wok402342500006en
local.relation.issue6cs
local.relation.volume769
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