Measurement of ΔS at COMPASS

Capozza, L. (2012) Measurement of ΔS at COMPASS. Il nuovo cimento C, 35 (4). pp. 21-26. ISSN 1826-9885

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The extraction of the strange quark contribution to the axial nucleon coupling ΔS from COMPASS data is reviewed. Both inclusive and semi-inclusive measurements are used. With inclusive data using SU(3) flavour symmetry one finds ΔS = −0.08 ± 0.01(stat.) ± 0.02(syst.), whereas from semi-inclusive data one has ΔS = −0.02 ± 0.02(stat.) ± 0.02(syst.). This disagreement was previously ascribed to the lack of data in the low Bjorken x domain. The COMPASS results do not validate this explanation completely.

Item Type: Article
Uncontrolled Keywords: Proton and neutron
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 21 Apr 2020 17:43
Last Modified: 21 Apr 2020 17:43

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