| Autor: |
Maximo Coppola, Daniel Gomez Dumm, Santiago Noguera, Norberto N. Scoccola |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Journal of High Energy Physics, Vol 2020, Iss 9, Pp 1-19 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
1029-8479 |
| DOI: |
10.1007/JHEP09(2020)058 |
| Popis: |
Abstract We study the effect of a uniform magnetic field B → $$ \overrightarrow{B} $$ on the decays π − → l − ν ¯ l $$ {\pi}^{-}\to {l}^{-}{\overline{\nu}}_l $$ , where l − = e −, μ −, carrying out a general analysis that includes four π − decay constants. Taking the values of these constants from a chiral effective Nambu-Jona-Lasinio (NJL) model, it is seen that the total decay rate gets strongly increased with respect to the B = 0 case, with an enhancement factor ranging from ∼ 10 for eB = 0.1 GeV2 up to ∼ 103 for eB = 1 GeV2. The ratio between electronic and muonic decays gets also enhanced, reaching a value of about 1 : 2 for eB = 1 GeV2. In addition, we find that for large B the angular distribution of outgoing antineutrinos shows a significant suppression in the direction of the magnetic field. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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