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• W3089096075 abstract "Abstract 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 $$A_mathrm{FB}^{ell gamma }$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msubsup> <mml:mi>A</mml:mi> <mml:mrow> <mml:mi>FB</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>ℓ</mml:mi> <mml:mi>γ</mml:mi> </mml:mrow> </mml:msubsup> </mml:math> between the muon and photon directions for the $$B rightarrow mu nu gamma $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mrow> <mml:mi>B</mml:mi> <mml:mo>→</mml:mo> <mml:mi>μ</mml:mi> <mml:mi>ν</mml:mi> <mml:mi>γ</mml:mi> </mml:mrow> </mml:math> 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 $$P_{tau }$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msub> <mml:mi>P</mml:mi> <mml:mi>τ</mml:mi> </mml:msub> </mml:math> in the rare $$B^-rightarrow ell ^-_{1}ell ^-_{2} pi ^+$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mrow> <mml:msup> <mml:mi>B</mml:mi> <mml:mo>-</mml:mo> </mml:msup> <mml:mo>→</mml:mo> <mml:msubsup> <mml:mi>ℓ</mml:mi> <mml:mn>1</mml:mn> <mml:mo>-</mml:mo> </mml:msubsup> <mml:msubsup> <mml:mi>ℓ</mml:mi> <mml:mn>2</mml:mn> <mml:mo>-</mml:mo> </mml:msubsup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:mrow> </mml:math> 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." @default.
• W3089096075 created "2020-10-01" @default.
• W3089096075 creator A5009768863 @default.
• W3089096075 creator A5073122790 @default.
• W3089096075 creator A5084375454 @default.
• W3089096075 date "2020-09-01" @default.
• W3089096075 modified "2023-10-18" @default.
• W3089096075 title "Angular and polarization observables for Majorana-mediated B decays with effective interactions" @default.
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• W3089096075 doi "https://doi.org/10.1140/epjc/s10052-020-08471-0" @default.
• W3089096075 hasPublicationYear "2020" @default.
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