Longitudinal double-spin asymmetry A1p and spin-dependent structure function g1p of the proton at small values of x and Q2; Physics Letters B; Vol. 781

Detaylı Bibliyografya
Parent link:	Physics Letters B Vol. 781.— 2018.— P. 464-472
Diğer Yazarlar:	Aghasyan M. Mher, Amoroso A., Burtsev V. E. Vitaly Evgenjevich, Chumakov A. G. Aleksandr Grigorjevich, Dusaev R. R. Renat Ramilyevich, Levchenko E. A. Evgeny Anatolievich, Lyubovitskiy (Lyubovitskij) V. E. Valery Efimovich, Mamon S. A. Sergey Aleksandrovich, Vasilishin B. I. Bogdan Ivanovich
Özet:	Title screen We present a precise measurement of the proton longitudinal double-spin asymmetry A1p and the proton spin-dependent structure function g1p at photonvirtualities 0.006(GeV/c)2<Q2<1(GeV/c)2 in the Bjorken x range of 4×10−5<x<4×10−2. The results are based on data collected by the COMPASS Collaboration at CERN using muon beam energies of 160GeV and 200GeV. The statistical precision is more than tenfold better than that of the previous measurement in this region. In the whole range of x, the measured values of A1p and g1p are found to be positive. It is for the first time that spin effects are found at such low values of x.
Dil:	İngilizce
Baskı/Yayın Bilgisi:	2018
Konular:	электронный ресурс труды учёных ТПУ Inelastic muon scattering Spin structure function мюонные атомы рассеяние
Online Erişim:	http://earchive.tpu.ru/handle/11683/57548 https://doi.org/10.1016/j.physletb.2018.03.044
Materyal Türü:	Elektronik Kitap Bölümü
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=660113

Diğer Bilgiler
Özet:	Title screen We present a precise measurement of the proton longitudinal double-spin asymmetry A1p and the proton spin-dependent structure function g1p at photonvirtualities 0.006(GeV/c)2<Q2<1(GeV/c)2 in the Bjorken x range of 4×10−5<x<4×10−2. The results are based on data collected by the COMPASS Collaboration at CERN using muon beam energies of 160GeV and 200GeV. The statistical precision is more than tenfold better than that of the previous measurement in this region. In the whole range of x, the measured values of A1p and g1p are found to be positive. It is for the first time that spin effects are found at such low values of x.
DOI:	10.1016/j.physletb.2018.03.044

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