Role of Collins effect in the single spin asymmetry AN in p↑p → h X processes

被引：49

作者：

Anselmino, M. ^{[1
,2
]}

Boglione, M. ^{[1
,2
]}

D'Alesio, U. ^{[3
,4
]}

Leader, E. ^{[5
]}

Melis, S. ^{[6
]}

Murgia, F. ^{[4
]}

Prokudin, A. ^{[7
]}

机构：

[1] Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy

[2] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

[3] Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, CA, Italy

[4] Ist Nazl Fis Nucl, Sez Cagliari, I-09042 Monserrato, CA, Italy

[5] Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England

[6] European Ctr Theoret Studies Nucl Phys & Related, I-38123 Villazzano, Trento, Italy

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

来源：

PHYSICAL REVIEW D | 2012年 / 86卷 / 07期

关键词：

HARD-SCATTERING; PION-PRODUCTION; CROSS-SECTIONS; FRAGMENTATION; AZIMUTHAL;

D O I：

10.1103/PhysRevD.86.074032

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The much debated issue of the transverse single spin asymmetry A(N) observed in the inclusive large P-T production of a single hadron in pp interactions, p up arrow p -> pi X, is considered in a transverse momentum dependent factorization scheme. A previous result [M. Anselmino et al., Phys. Rev. D 71, 014002 (2005), M. Anselmino et al., Phys. Rev. D 73, 014020 (2006)] stating that the maximum contribution of the Collins effect is strongly suppressed, is revisited, correcting a numerical error. New estimates are given, adopting the Collins functions recently extracted from semi-inclusive deep inelastic scattering and e(+)e(-) data, and phenomenological consequences are discussed.

引用

页数：9

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