Transverse-momentum-dependent parton distributions in a spectator diquark model
Within the framework of a spectator diquark model of the nucleon, involving both scalar and axial-vector diquarks, we calculate all the leading-twist transverse-momentum-dependent parton distribution functions (TMDs). Naive Time-odd densities are generated through a one-gluon-loop rescattering mechanism, simulating the final state interactions required for these functions to exist. Analytic results are obtained for all the TMDs, and a connection with the light-cone wave functions formalism is also established. The model parameters are fixed by reproducing the phenomenological parametrizations of unpolarized and helicity parton distributions at the lowest available scale. Predictions for the other parton densities are given and, whenever possible, compared with available parametrizations.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 978693
- Report Number(s):
- JLAB-THY-09-1058; DOE/OR/23177-0998; TRN: US1003028
- Journal Information:
- J.Phys.Conf.Ser., Vol. 168; Conference: Cortona 2008, 8-10 Oct 2008, Cortona, Italy
- Country of Publication:
- United States
- Language:
- English
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