at a rate of one out of [Formula omitted] tau decays?
We present in a full analytic form the partial widths for the lepton flavour violating decays [Formula omitted] and [Formula omitted], with [Formula omitted], mediated by neutrino oscillations in the one-loop diagrams. Compared to the first result by Petcov (Sov J Nucl Phys 25:340, 1977), obtained i...
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creator | Blackstone, Patrick Fael, Matteo Passemar, Emilie |
description | We present in a full analytic form the partial widths for the lepton flavour violating decays [Formula omitted] and [Formula omitted], with [Formula omitted], mediated by neutrino oscillations in the one-loop diagrams. Compared to the first result by Petcov (Sov J Nucl Phys 25:340, 1977), obtained in the zero momentum limit [Formula omitted], we retain full dependence on [Formula omitted], the momenta and masses of external particles, and we determine the branching ratios in the physical limit [Formula omitted]. We show that the claim presented in Pham (Eur Phys J C8:513, 1999) that the [Formula omitted] branching ratios could be as large as [Formula omitted], as a consequence of keeping the [Formula omitted] dependence, is flawed. We find rates of order [Formula omitted], even smaller than those obtained in the zero momentum limit, as the latter prediction contains an unphysical logarithmic enhancement. |
doi_str_mv | 10.1140/epjc/s10052-020-8059-7 |
format | Article |
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C, Particles and fields</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Blackstone, Patrick</au><au>Fael, Matteo</au><au>Passemar, Emilie</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>at a rate of one out of [Formula omitted] tau decays?</atitle><jtitle>The European physical journal. C, Particles and fields</jtitle><date>2020-06-05</date><risdate>2020</risdate><volume>80</volume><issue>6</issue><issn>1434-6044</issn><eissn>1434-6052</eissn><abstract>We present in a full analytic form the partial widths for the lepton flavour violating decays [Formula omitted] and [Formula omitted], with [Formula omitted], mediated by neutrino oscillations in the one-loop diagrams. Compared to the first result by Petcov (Sov J Nucl Phys 25:340, 1977), obtained in the zero momentum limit [Formula omitted], we retain full dependence on [Formula omitted], the momenta and masses of external particles, and we determine the branching ratios in the physical limit [Formula omitted]. We show that the claim presented in Pham (Eur Phys J C8:513, 1999) that the [Formula omitted] branching ratios could be as large as [Formula omitted], as a consequence of keeping the [Formula omitted] dependence, is flawed. We find rates of order [Formula omitted], even smaller than those obtained in the zero momentum limit, as the latter prediction contains an unphysical logarithmic enhancement.</abstract><pub>Springer</pub><doi>10.1140/epjc/s10052-020-8059-7</doi></addata></record> |
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title | at a rate of one out of [Formula omitted] tau decays? |
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