@Article{Coppola_etal2020,
author="Coppola, M.
and Gomez Dumm, D.
and Noguera, S.
and Scoccola, N. N.",
title="Magnetic field driven enhancement of the weak decay width of charged pions",
journal="Journal of High Energy Physics",
year="2020",
publisher="Springer",
volume="09",
number="9",
pages="058--19pp",
optkeywords="QCD Phenomenology",
abstract="We study the effect of a uniform magnetic field B on the decays pi- > l- nu{\_}l bar, where l(-)=e(-), $\mu$(-), carrying out a general analysis that includes four pi (-) 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 similar to 10 for eB = 0.1 GeV2 up to similar to 10(3) 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.",
optnote="WOS:000570908100001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4534), last updated on Fri, 02 Oct 2020 07:33:51 +0000",
issn="1029-8479",
doi="10.1007/JHEP09(2020)058",
opturl="https://arxiv.org/abs/1908.10765",
opturl="https://doi.org/10.1007/JHEP09(2020)058",
language="English"
}