Título:
Angular and polarization observables for Majorana-mediated B decays with effective interactions
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Autor:
Duarte, Lucía
Zapata, Gabriel
Sampayo, Oscar A.
Zapata, Gabriel
Sampayo, Oscar A.
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Artículo
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Año de publicación:
2020
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Resumen:
We probe the effective field theory extending the Standard Model with a sterile neutrino in B meson decays at B factories and lepton colliders, using angular and polarization observables. We put bounds on different effective operators characterized by their distinct Dirac–Lorentz structure, and probe the N-mediated B decays sensitivity to these interactions. We define a forward–backward asymmetry AℓγFB between the muon and photon directions for the B→μνγ decay, which allows us to separate the SM contribution from the effective lepton number conserving and violating processes, mediated by a near on-shell N. Using the most stringent constraints on the effective parameter space from Belle and BaBar we find that a measurement of the final polarization Pτ in the rare B−→ℓ−1ℓ−2π+ decays can help us infer the scalar or vector interaction content in the N production or decay vertices. We find that the B meson decays are more sensitive to scalar operators.
Descripción:
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Editorial:
Società Italiana di Fisica
EN:
European Physical Journal C, 2020, 80:896
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Citación:
Duarte, L, Zapata, G y Sampayo, O. "Angular and polarization observables for Majorana-mediated B decays with effective interactions". European Physical Journal C. [en línea] 2020, 80: 896. 16 h. DOI: 10.1140/epjc/s10052-020-08471-0
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ISSN:
1434-6052
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Licencia Creative Commons Atribución (CC - By 4.0)
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| Ficheros | Descripción | Tamaño | Formato | ||
|---|---|---|---|---|---|
| 10.1140epjcs10052-020-08471-0.pdf | — | 1.35 MB | Adobe PDF |