Single spin asymmetries in lp → hX processes: A test of factorization

被引：24

作者：

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

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

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

Melis, S. ^{[2
,5
]}

Murgia, F. ^{[4
]}

Prokudin, A. ^{[1
,2
]}

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 Piemonte Orientale, Dipartimento Sci & Tecnol Avanzate, I-15121 Alessandria, Italy

来源：

PHYSICAL REVIEW D | 2010年 / 81卷 / 03期

关键词：

P-UP-ARROW; DRELL-YAN; HARD-SCATTERING; PION-PRODUCTION; SIVERS ASYMMETRIES; STATE INTERACTIONS; HADRON STRUCTURE; CROSS-SECTIONS; COLLINS; AZIMUTHAL;

D O I：

10.1103/PhysRevD.81.034007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Predictions for the transverse single spin asymmetry (SSA), A(N), are given for the inclusive processes lp(up arrow) -> hX and lp(up arrow) -> jet + X, which could be measured in operating or future experiments. These estimates are based on the Sivers distributions and the Collins fragmentation functions which fit the azimuthal asymmetries measured in semi-inclusive deep inelastic scattering (SIDIS) processes (lp up arrow -> l'hX). The factorization in terms of transverse momentum dependent distribution and fragmentation functions (TMD factorization)-which supplies the theoretical framework in which SIDIS azimuthal asymmetries are analyzed-is assumed to hold also for the lp -> hX inclusive process at large P-T. A measurement of A(N) would then provide a direct test of the validity of the TMD factorization in this case and would have important consequences for the study and understanding of SSAs in pp(up arrow) -> hX processes.

引用

页数：13

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