Search for the lepton-flavour violating decays B<SUP>0</SUP> → K*0 τ<SUP>±</SUP>μ∓



Aaij, R, Abdelmotteleb, ASW, Beteta, C Abellan, Abudinen, F, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Agapopoulou, C, Aidala, CA
et al (show 1057 more authors) (2023) Search for the lepton-flavour violating decays B<SUP>0</SUP> → K*0 τ<SUP>±</SUP>μ∓. JOURNAL OF HIGH ENERGY PHYSICS, 2023 (6).

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>A first search for the lepton-flavour violating decays <jats:italic>B</jats:italic><jats:sup>0</jats:sup> → <jats:italic>K</jats:italic><jats:sup>*0</jats:sup><jats:italic>τ</jats:italic><jats:sup><jats:italic>±</jats:italic></jats:sup><jats:italic>μ</jats:italic><jats:sup>∓</jats:sup> is presented. The analysis is performed using a sample of proton-proton collision data, collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV between 2011 and 2018, corresponding to an integrated luminosity of 9 fb<jats:sup><jats:italic>−</jats:italic>1</jats:sup>. No significant signal is observed, and upper limits on the branching fractions are determined to be <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \mathcal{B}\left({B}^0\to {K}^{\ast 0}{\tau}^{+}{\mu}^{-}\right)&lt;1.0(1.2)\times {10}^{-5} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>B</mml:mi> <mml:mfenced> <mml:mrow> <mml:msup> <mml:mi>B</mml:mi> <mml:mn>0</mml:mn> </mml:msup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>K</mml:mi> <mml:mrow> <mml:mo>∗</mml:mo> <mml:mn>0</mml:mn> </mml:mrow> </mml:msup> <mml:msup> <mml:mi>τ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:msup> <mml:mi>μ</mml:mi> <mml:mo>−</mml:mo> </mml:msup> </mml:mrow> </mml:mfenced> <mml:mo>&lt;</mml:mo> <mml:mn>1.0</mml:mn> <mml:mfenced> <mml:mn>1.2</mml:mn> </mml:mfenced> <mml:mo>×</mml:mo> <mml:msup> <mml:mn>10</mml:mn> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>5</mml:mn> </mml:mrow> </mml:msup> </mml:math></jats:alternatives></jats:inline-formula> and <jats:inline-formula><jats:alternatives><jats:tex-math>$$ \mathcal{B}\left({B}^0\to {K}^{\ast 0}{\tau}^{-}{\mu}^{+}\right)&lt;8.2(9.8)\times {10}^{-6} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>B</mml:mi> <mml:mfenced> <mml:mrow> <mml:msup> <mml:mi>B</mml:mi> <mml:mn>0</mml:mn> </mml:msup> <mml:mo>→</mml:mo> <mml:msup> <mml:mi>K</mml:mi> <mml:mrow> <mml:mo>∗</mml:mo> <mml:mn>0</mml:mn> </mml:mrow> </mml:msup> <mml:msup> <mml:mi>τ</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:msup> <mml:mi>μ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:mrow> </mml:mfenced> <mml:mo>&lt;</mml:mo> <mml:mn>8.2</mml:mn> <mml:mfenced> <mml:mn>9.8</mml:mn> </mml:mfenced> <mml:mo>×</mml:mo> <mml:msup> <mml:mn>10</mml:mn> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>6</mml:mn> </mml:mrow> </mml:msup> </mml:math></jats:alternatives></jats:inline-formula> at the 90% (95%) confidence level.</jats:p>

Item Type: Article
Uncontrolled Keywords: B Physics, Beyond Standard Model, Hadron-Hadron Scattering, Rare Decay
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 24 Jul 2023 14:30
Last Modified: 16 Oct 2023 16:19
DOI: 10.1007/JHEP06(2023)143
Open Access URL: https://link.springer.com/content/pdf/10.1007/JHEP...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3171848