Leading-twist single-transverse-spin asymmetries: Drell-Yan and deep-inelastic scattering

被引：790

作者：

Collins, JC ^{[1
]}

机构：

[1] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

来源：

PHYSICS LETTERS B | 2002年 / 536卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(02)01819-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recently, Brodsky, Hwang and Schmidt have proposed a new mechanism that gives a transverse spin symmetry at leading twist in semi-inclusive deep-inelastic scattering. I show that the new mechanism is compatible with factorization and is due to a transverse-spin asymmetry in the k(T) distribution of quarks in a hadron (the "Sivers asymmetry"). An earlier proof that the Sivers asymmetry vanishes because of time-reversal invariance is invalidated by the path-ordered exponential of the gluon field in the operator definition of parton densities. Instead, the time-reversal argument shows that the Sivers asymmetry is reversed in sign in hadron-induced hard processes (e.g., Drell-Yan), thereby violating naive universality of parton densities. Previous phenomenology with time-reversal-odd parton densities is therefore validated. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：43 / 48

页数：6

共 35 条

[1] Evidence for a single-spin azimuthal asymmetry in semi-inclusive pion electroproduction [J].

Airapetian, A ;

Akopov, N ;

Amarian, M ;

Aschenauer, EC ;

Avakian, H ;

Avakian, R ;

Avetissian, A ;

Avetissian, E ;

Bains, B ;

Baumgarten, C ;

Beckmann, M ;

Belostotski, S ;

Belz, JE ;

Benisch, T ;

Bernreuther, S ;

Bianchi, N ;

Blouw, J ;

Böttcher, H ;

Borissov, A ;

Bouwhuis, M ;

Brack, J ;

Brauksiepe, S ;

Braun, B ;

Bray, B ;

Brons, S ;

Brückner, W ;

Brüll, A ;

Bruins, EEW ;

Bulten, HJ ;

Capitani, GP ;

Carter, P ;

Chumney, P ;

Cisbani, E ;

Court, GR ;

Dalpiaz, PF ;

De Sanctis, E ;

De Schepper, D ;

Devitsin, E ;

Huberts, PKAD ;

Di Nezza, P ;

Düren, M ;

Dvoredsky, A ;

Elbakian, G ;

Ely, J ;

Fantoni, A ;

Fechtchenko, A ;

Ferstl, M ;

Fiedler, K ;

Filippone, BW ;

Fischer, H .

PHYSICAL REVIEW LETTERS, 2000, 84 (18) :4047-4051

[2] Non-standard time reversal for particle multiplets and the spin-flavor structure of hadrons [J].

Anselmino, M ;

Barone, V ;

Drago, A ;

Murgia, F .

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 2002, 105 :132-133

[3] Single spin asymmetries in p↑p and (p)over-bar↑p inclusive processes [J].

Anselmino, M ;

Murgia, F .

PHYSICS LETTERS B, 1998, 442 (1-4) :470-478

[4] Transverse polarisation of quarks in hadrons [J].

Barone, V ;

Drago, A ;

Ratcliffe, PG .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2002, 359 (1-2) :1-168

[5] FACTORIZATION OF THE DRELL-YAN CROSS-SECTION IN PERTURBATION-THEORY [J].

BODWIN, GT .

PHYSICAL REVIEW D, 1985, 31 (10) :2616-2642

[6] CORRECTION [J].

TUCCI, R .

PHYSICAL REVIEW D, 1986, 34 (12) :3933-3933

[7] Investigating the origins of transverse spin asymmetries at BNL RHIC [J].

Boer, D .

PHYSICAL REVIEW D, 1999, 60 (01)

[8] Time-reversal odd distribution functions in leptoproduction [J].

Boer, D ;

Mulders, PJ .

PHYSICAL REVIEW D, 1998, 57 (09) :5780-5786

[9] SPIN EFFECTS AND FACTORIZATION IN THE DRELL-YAN PROCESS [J].

BRANDENBURG, A ;

NACHTMANN, O ;

MIRKES, E .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1993, 60 (04) :697-709

[10] Final-state interactions and single-spin asymmetries in semi-inclusive deep inelastic scattering [J].

Brodsky, SJ ;

Hwang, DS ;

Schmidt, I .

PHYSICS LETTERS B, 2002, 530 (1-4) :99-107

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