Pion-to-vacuum vector and axial vector amplitudes and weak decays of pions in a magnetic field

被引：10

作者：

Coppola, M. ^{[1
,2
]}

Gomez Dumm, D. ^{[3
]}

Noguera, S. ^{[4
,5
]}

Scoccola, N. N. ^{[1
,2
,6
]}

机构：

[1] Consejo Nacl Invest Cient & Tecn, Rivadavia 1917, RA-1033 Buenos Aires, DF, Argentina

[2] Comis Nacl Energia Atom, Phys Dept, Ave Libertador 8250, RA-1429 Buenos Aires, DF, Argentina

[3] Univ Nacl La Plata, Fac Ciencias Exactas, CONICET, Dept Fis,IFLP, CC 67, RA-1900 La Plata, Buenos Aires, Argentina

[4] Ctr Mixto Univ Valencia, CSIC, Dept Fis Teor, E-46100 Burjassot, Valencia, Spain

[5] Ctr Mixto Univ Valencia, CSIC, IFIC, E-46100 Burjassot, Valencia, Spain

[6] Univ Favaloro, Solis 453, RA-1078 Buenos Aires, DF, Argentina

来源：

PHYSICAL REVIEW D | 2019年 / 99卷 / 05期

关键词：

PLANE ELECTROMAGNETIC-WAVE; NEUTRON BETA-DECAY; QUANTUM PROCESSES;

D O I：

10.1103/PhysRevD.99.054031

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We propose a model-independent parametrization for the one-pion-to-vacuum matrix elements of the vector and axial vector hadronic currents in the presence of an external uniform magnetic field. It is shown that, in general, these hadronic matrix elements can be written in terms of several gauge covariant Lorentz structures and form factors. Within this framework we obtain a general expression for the weak decay pi(- )-> l(nu)over bar(l) and discuss the corresponding limits of strong and weak external magnetic fields.

引用

页数：18

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