Please use this identifier to cite or link to this item: http://earchive.tpu.ru/handle/11683/57548
Title: Longitudinal double-spin asymmetry A1p and spin-dependent structure function g1p of the proton at small values of x and Q2
Authors: Aghasyan, Mher
Amoroso, A.
Burtsev, Vitaly Evgenjevich
Chumakov, Aleksandr Grigorjevich
Dusaev, Renat Ramilyevich
Levchenko, Evgeny Anatolievich
Lyubovitskiy (Lyubovitskij), Valery Efimovich
Mamon, Sergey Aleksandrovich
Vasilishin, Bogdan Ivanovich
Keywords: Inelastic muon scattering; Spin structure function; мюонные атомы; рассеяние
Issue Date: 2018
Publisher: Томский политехнический университет
Citation: Longitudinal double-spin asymmetry A1p and spin-dependent structure function g1p of the proton at small values of x and Q2 / M. Aghasyan [et al.] // Physics Letters B. — 2018. — Vol. 781. — [P. 464-472].
Abstract: 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.
URI: http://earchive.tpu.ru/handle/11683/57548
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