Transversity quark distributions in a covariant quark-diquark model.
Abstract: Transversity quark light-cone momentum distributions are calculated for the nucleon. We utilize a modified Nambu--Jona-Lasinio model in which confinement is simulated by eliminating unphysical thresholds for nucleon decay into quarks. The nucleon bound state is obtained by solving the relativistic Faddeev equation in the quark-diquark approximation, where both scalar and axial-vector diquark channels are included. Particular attention is paid to comparing our results with the recent experimental extraction of the transversity distributions by Anselmino et al. We also compare our transversity results with earlier spin-independent and helicity quark distributions calculated in the same approach.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 925364
- Report Number(s):
- ANL/PHY/JA-59962; PYLBAJ; TRN: US0802431
- Journal Information:
- Phys. Lett. B, Vol. 659, Issue 1-2 ; Jan. 17, 2008; ISSN 0370-2693
- Country of Publication:
- United States
- Language:
- ENGLISH
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