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Renormalisation-group improved analysis of [mu] [rarr] e processes in a systematic effective-field-theory approach

Crivellin, A ; Davidson, S ; Pruna, G M ; Signer, A

The journal of high energy physics, 2017-05, Vol.2017 (5), p.1 [Periódico revisado por pares]

Heidelberg: Springer Nature B.V

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  • Título:
    Renormalisation-group improved analysis of [mu] [rarr] e processes in a systematic effective-field-theory approach
  • Autor: Crivellin, A ; Davidson, S ; Pruna, G M ; Signer, A
  • Assuntos: Broken symmetry ; Coefficients ; Conversion ; Correlation analysis ; Evolution ; High energy physics ; Operators ; Phenomenology
  • É parte de: The journal of high energy physics, 2017-05, Vol.2017 (5), p.1
  • Descrição: Abstract In this article, a complete analysis of the three muonic lepton-flavour violating processes [mu] [rarr] eγ, [mu] [rarr] 3e and coherent nuclear [mu] [rarr] e conversion is performed in the framework of an effective theory with dimension six operators defined below the electroweak symmetry breaking scale m W . The renormalisation-group evolution of the Wilson coefficients between m W and the experimental scale is fully taken into account at the leading order in QCD and QED, and explicit analytic and numerical evolution matrices are given. As a result, muonic decay and conversion rates are interpreted as functions of the Wilson coefficients at any scale up to m W . Taking the experimental limits on these processes as input, the phenomenology of the mixing effects is investigated. It is found that a considerable set of Wilson coefficients unbounded in the simplistic tree-level approach are instead severely constrained. In addition, correlations among operators are studied both in the light of current data and future experimental prospects.
  • Editor: Heidelberg: Springer Nature B.V
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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