Single spin asymmetries in hadronic processes

✍ Scribed by Dae Sung Hwang

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 240 KB
• Volume: 214
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/j.nuclphysbps.2011.03.080

✦ Synopsis

Single-spin asymmetry (SSA) phenomena in hadron physics are studied. The SSAs in semi-inclusive Deep Inelastic Scattering (DIS) is understood by the final-state interactions from gluon exchange between the outgoing quark and the target spectator system. The existence of such SSAs for transversely polarized nucleon targets requires a phase difference between two amplitudes coupling the proton target with J z p = ± 1 2 to the same final-state. The asymmetry of the angular distribution in Drell-Yan processes is investigated by the SSA of the quark spin which is induced by the initial-state interactions.