Bali, G. S. and Brandt, B. B. and Endrodi, G. and Glaessle, B. (2018) Weak Decay of Magnetized Pions. PHYSICAL REVIEW LETTERS, 121 (7): 072001. ISSN 0031-9007, 1079-7114
Full text not available from this repository.Abstract
The leptonic decay of charged pions is investigated in the presence of background magnetic fields. In this situation, Lorentz symmetry is broken, and new fundamental decay constants need to be introduced, associated with the decay via the vector part of the electroweak current. We calculate the magnetic field dependence of both the usual and a new decay constant nonperturbatively on the lattice. We employ both Wilson and staggered quarks and extrapolate the results to the continuum limit. With this nonperturbative input, we calculate the tree level electroweak amplitude for the full decay rate in strong magnetic fields. We find that the muonic decay of the charged pion is enhanced drastically by the magnetic field. We comment on possible astrophysical implications.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HIGH-ENERGY NEUTRINOS; NEUTRON BETA-DECAY; NONPERTURBATIVE RENORMALIZATION; FIELD; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Gunnar Bali |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 10 Jan 2020 10:23 |
| Last Modified: | 10 Jan 2020 10:24 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14049 |
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