Leading-twist Single-transverse-spin asymmetries: Drell-Yan and Deep-Inelastic Scattering
| dc.creator | Collins, John C. | |
| dc.date | 2002-03-30 | |
| dc.date | 2002-05-02 | |
| dc.date.accessioned | 2026-07-07T10:33:01Z | |
| dc.date.available | 2026-07-07T10:33:01Z | |
| dc.description | 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 an 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. | |
| dc.description | 12 pages latex. V.2: references corrected. V.3: references added, misprints corrected | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0204004 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0204004 | |
| dc.identifier | Phys.Lett.B536:43-48,2002 | |
| dc.identifier | doi:10.1016/S0370-2693(02)01819-1 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/178963 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Leading-twist Single-transverse-spin asymmetries: Drell-Yan and Deep-Inelastic Scattering | |
| dc.type | text |