Next-to-leading order weighted Sivers asymmetry in semi-inclusive deep inelastic scattering: three-gluon correlator

Conference · Tue Sep 01 00:00:00 EDT 2015 · Proceedings of Science

OSTI ID:1224702

Dai, Lingyun ^[1]; Prokudin, Alexei ^[2]; Kang, Zhong-Bo ^[3]; Vitev, Ivan ^[4]

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1. Indiana University , Bloomington, IN
2. Jefferson Lab, Newport News, VA
3. Los Alamos National Laboratory, Los Alamos, NM 87545
4. Los Alamos National Laboratory, Los Alamos

We study the three-gluon correlation function contribution to the Sivers asymmetry in semi-inclusive deep inelastic scattering. We first establish the matching between the usual twist-3 collinear factorization approach and transverse momentum dependent factorization formalism for the moderate transverse momentum region. We then derive the so-called coefficient functions used in the usual TMD evolution formalism. Finally, we perform the next-to-leading order calculation for the transverse-momentum-weighted spin-dependent differential cross section, from which we identify the QCD collinear evolution of the twist-3 Qiu-Sterman function: the off-diagonal contribution from the three-gluon correlation functions.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177; AC52-06NA25396
• OSTI ID: 1224702
• Report Number(s): JLAB-THY-15-2137; DOE/OR/23177-3597
• Journal Information: Proceedings of Science, Vol. DIS2015; Conference: DIS 2015, April 27 - May 1, 2015, Southern Methodist University, Dallas, Texas
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS