Form factors of radiative pion decays in nonlocal chiral quark models

被引：10
|
作者：
Gomez Dumm, D. [1 ,2 ]
Noguera, S. [3 ,4 ]
Scoccola, N. N. [2 ,5 ,6 ]
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, Dept Fis Teor, E-46100 Burjassot, Valencia, Spain
[4] Univ Valencia, CSIC, Inst Fis Corpuscular, E-46100 Burjassot, Valencia, Spain
[5] Comis Nacl Energia Atom, Dept Phys, RA-1429 Buenos Aires, DF, Argentina
[6] Univ Favaloro, RA-1078 Buenos Aires, DF, Argentina
来源：
PHYSICAL REVIEW D | 2012年 / 86卷 / 07期
关键词：
JONA-LASINIO MODEL; PERTURBATION-THEORY; SYMMETRY; SOLITONS;
D O I：
10.1103/PhysRevD.86.074020
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the radiative pion decay pi(+) -> e(+) nu(e)gamma within nonlocal chiral quark models that include wave function renormalization. In this framework we analyze the momentum dependence of the vector form factor F-V(q(2)) and the slope of the axial-vector form factor F-A(q(2)) at threshold. Our results are compared with available experimental information and with the predictions given by the Nambu-Jona-Lasinio model. In addition we calculate the low energy constants l(5) and l(6), comparing our results with the values obtained in chiral perturbation theory.
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收藏
页数：10
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