arXiv:hep-ph/0512124·v1·High Energy Physics — Phenomenology
Helicity Formalism and Spin Asymmetries in Hadronic Processes
M. Anselmino (1)🇮🇹 · M. Boglione (1)🇮🇹 · U. D'Alesio (2)🇮🇹 · E. Leader (3)🇬🇧 · S. Melis (2)🇮🇹 · F. Murgia (2) ((1) University and INFN, Torino, Italy, (2) University and INFN, Cagliari, Italy, (3) Imperial College, London, U.K.)🇮🇹
Abstract
We present a generalized QCD factorization scheme for the high energy inclusive polarized process, (A, S_A) + (B, S_B) -> C + X, including all intrinsic partonic motions. This introduces many non-trivial azimuthal phases and several new spin and k_T dependent soft functions. The formal expressions for single and double spin asymmetries are discussed. Numerical results for A_N[p(transv. polarized) p -> pi + X] are presented.
Comments: 8 pages, 4 ps figures, uses ws-procs9x6.cls and rotating_pr.sty (included). Talk delivered by F. Murgia at the "International Workshop on Transverse Polarisation Phenomena in Hard Processes" (TRANSVERSITY 2005), September 7-10 2005, Como, Italy