arXiv:1303.3227·v1·High Energy Physics — Phenomenology
On the potential role of the Collins effect in A_N in pp --> pion X
M. Anselmino (1)🇮🇹 · M. Boglione (1)🇮🇹 · U. D'Alesio (2,3)🇮🇹 · E. Leader (4)🇬🇧 · S. Melis (5)🇮🇹 · F. Murgia (3)🇮🇹 · A. Prokudin (6) ((1) University of Torino and INFN, Torino, Italy, (2) University of Cagliari, Italy, (3) INFN, Cagliari, Italy, (4) Imperial College, London, UK, (5) ECT, Trento, Italy, (6) JLab, Newport News, USA)🇺🇸
Abstract
Transverse single spin asymmetries in pp --> pion X processes, while on a quite firm ground experimentally, are still a much debated phenomenological issue. We consider them in a transverse momentum dependent factorization scheme. After revisiting a previous result, we give new estimates of the Collins contribution by adopting the latest information on the Collins and transversity functions, as extracted from SIDIS and e+e- data.
Comments: 4 pages, 4 figures, uses cimento.cls. Talk delivered by U. D'Alesio at the "3rd Workshop on the QCD Structure of the Nucleon" (QCD-N'12), Oct. 22-26, 2012, Bilbao, Spain. Submitted to "Il Nuovo Cimento C"