Valence quark distributions in the pion
Aug, 20008 pages
Published in:
- Phys.Rev.C 63 (2001) 025213
e-Print:
- nucl-th/0008049 [nucl-th]
Report number:
- ANL-PHY-9646-TH-2000
Citations per year
Abstract:
We calculate the pion's valence-quark momentum-fraction probability distribution using a Dyson-Schwinger equation model. Valence-quarks with an active mass of 0.30 GeV carry 71% of the pion's momentum at a resolving scale q_0=0.54 GeV = 1/(0.37 fm). The shape of the calculated distribution is characteristic of a strongly bound system and, evolved from q_0 to q=2 GeV, it yields first, second and third moments in agreement with lattice and phenomenological estimates, and valence-quarks carrying 49% of the pion's momentum. However, pointwise there is a discrepancy between our calculated distribution and that hitherto inferred from parametrisations of extant pion-nucleon Drell-Yan data.- lepton hadron: deep inelastic scattering
- pi: distribution function
- quark: valence
- quark: mass
- Dyson-Schwinger equation
- quark: propagator
- quark: momentum
- numerical calculations: interpretation of experiments
References(0)
Figures(0)
Loading ...