Nucleon tensor charge from Collins azimuthal asymmetry measurements

被引：42

作者：

Kang, Zhong-Bo ^{[1
]}

Prokudin, Alexei ^{[2
]}

Sun, Peng ^{[3
]}

Yuan, Feng ^{[3
]}

机构：

[1] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

[2] Jefferson Lab, Newport News, VA 23606 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW D | 2015年 / 91卷 / 07期

关键词：

TRANSVERSE-MOMENTUM DISTRIBUTIONS; DEPENDENT PARTON DISTRIBUTIONS; SPIN ASYMMETRIES; FRAGMENTATION; EVOLUTION; ANNIHILATION; QUARKS; SIDIS;

D O I：

10.1103/PhysRevD.91.071501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the nucleon tensor charge from current experiments by a combined analysis of the Collins asymmetries in two hadron production in e(+)e(-) annihilations and semi-inclusive hadron production in deep inelastic scattering processes. The transverse momentum dependent evolution is taken into account, for the first time, in the global fit of the Collins fragmentation functions and the quark transversity distributions at the approximate next-to-leading logarithmic order. We obtain the nucleon tensor charge contribution from up and down quarks as delta u = +0.30(-0.08)(+0.12) and delta d = -0.20(-0.11)(+0.28) at 90% confidence level for momentum fraction 0.0065 <= x(B) <= 0.35 and Q(2) = 10 GeV2.

引用

页数：6

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