Pion distribution amplitude and the pion-photon transition form factor in a nonlocal chiral quark model

被引：14

作者：

Gomez Dumm, D. ^{[1
,2
]}

Noguera, S. ^{[3
]}

Scoccola, N. N. ^{[2
,4
,5
]}

Scopetta, S. ^{[6
,7
]}

机构：

[1] Univ Nacl La Plata, CONICET, IFLP, Dept Fis, RA-1900 La Plata, Argentina

[2] Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina

[3] Univ Valencia, CSIC, Inst Fis Corpuscular, Dept Fis Teor, E-46100 Valencia, Spain

[4] Comis Nacl Energia Atom, Dept Phys, RA-1429 Buenos Aires, DF, Argentina

[5] Univ Favaloro, RA-1078 Buenos Aires, DF, Argentina

[6] Univ Perugia, Dipartimento Fis & Geol, I-06100 Perugia, Italy

[7] INFN, Sez Perugia, I-06100 Perugia, Italy

来源：

PHYSICAL REVIEW D | 2014年 / 89卷 / 05期

关键词：

MOMENTUM DISTRIBUTION; ASYMPTOTIC-BEHAVIOR; EXCLUSIVE PROCESSES; SOLITONS;

D O I：

10.1103/PhysRevD.89.054031

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the pion distribution amplitude (pi DA) in the context of a nonlocal chiral quark model. The corresponding Lagrangian reproduces the phenomenological values of the pion mass and decay constant, as well as the momentum dependence of the quark propagator obtained in lattice calculations. It is found that the obtained pi DA has two symmetric maxima, which arise from the new contributions generated by the nonlocal character of the interactions. This pi DA is applied to leading order and next-to-leading order calculations of the pion-photon transition form factor. Implications of the results are discussed.

引用

页数：14

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