Consistency check of charged hadron multiplicities and fragmentation functions in SIDIS

Yang, Dong Jing; Jiang, Fu-Jiun; Chang, W. C.; Kao, Cheng−Yan; Nam, Seung Il

doi:10.1016/j.physletb.2016.02.046

Cited by 6 publications

(2 citation statements)

References 17 publications

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“…1. The unexpected behaviour of HERMES data was also discussed in the recent literature, see [5,6,7,8]. However, it is interesting to notice that in the case of π multiplicity ratio COMPASS and HERMES data agree within uncertainties, as presented in the right panel of Fig.…”

Section: Resultssupporting

confidence: 76%

Final COMPASS results on hadrons, pions and kaons multiplicities in SIDIS

Stolarski¹

2017

Proceedings of XXV International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS2017)

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COMPASS final results on multiplicities of charged hadrons and of identified pions and kaons produced in the deep inelastic muon scattering off an isoscalar target are presented. Measurements are done in bins of x,y and z in a wide kinematic range. The hadron and pion data show a good agreement with (N)LO QCD expectations. The most interesting is the kaon multiplicity that allows to extract kaon fragmentation functions, a crucial ingredient in solving the strange quark polarisation puzzle. The COMPASS results are quite different from the expectations of the old NLO DSS fit; and they cannot be described by LO QCD either. In this context the importance of K + /K − multiplicity ratio at high z is discussed.

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Section: Resultssupporting

confidence: 76%

Final COMPASS results on hadrons, pions and kaons multiplicities in SIDIS

Stolarski¹

2017

Proceedings of XXV International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS2017)

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“…The strange quark PDF has been extracted phenomenologically in global QCD fits by several groups [3][4][5][6], largely relying on data on dimuon production in neutrino-nucleus scattering [7,8], as well as from data on weak boson production in proton-proton collisions by the ATLAS and CMS experiments at the LHC [9][10][11][12]. It has also been extracted experimentally from semi-inclusive deeply inelastic scattering (SIDIS) data in kaon production by the HERMES collaboration [13,14], and, with decreased sensitivity, from pion production data [15]. All of these show large differences in the size and shape of the obtained s-quark momentum distribution.…”

Section: Introductionmentioning

confidence: 99%

Gauge invariance and kaon production in deep inelastic scattering at low scales

Guerrero

Accardi

2018

Phys. Rev. D

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This paper focuses on hadron mass effects in calculations of semi-inclusive kaon production in leptonDeuteron deeply inelastic scattering at HERMES and COMPASS kinematics. In the collinear factorization framework, the corresponding cross section is shown to factorize, at leading order and leading twist, into products of parton distributions and fragmentation functions evaluated in terms of kaon-and nucleon-mass-dependent scaling variables, and to respect gauge invariance. It is found that hadron mass corrections for integrated kaon multiplicities sizeably reduce the apparent large discrepancy between measurements of K þ þ K − multiplicities performed by the two collaborations, and fully reconcile their K þ =K − ratios.

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