Search for the lepton-flavour violating decays B0 -> K*0µ(±)e(∓) and B(s)0-> ϕµ(±)e(∓)

Lesya Shchutska, Olivier Schneider, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Tatsuya Nakada, Michel De Cian, Elena Graverini, Renato Quagliani, Veronica Sølund Kirsebom, Elisabeth Maria Niel, Ettore Zaffaroni, Matthieu Philippe Luther Marinangeli, Donal Patrick Hill, Vladimir Macko, Sebastian Schulte, Lino Ferreira Lopes, Surapat Ek-In, Carina Trippl, Sara Celani, Serhii Cholak, Ana Bárbara Rodrigues Cavalcante
2023

Résumé

A search for the lepton-flavour violating decays B0 -> K*0µ(±)e(∓) and B(s)0-> ϕµ(±)e(∓) is presented, using proton-proton collision data collected by the LHCb detector at the LHC, corresponding to an integrated luminosity of 9 fb(-1). No significant signals are observed and upper limits of [see Image] are set at 90% (95%) confidence level. These results constitute the world's most stringent limits to date, with the limit on the decay B(s)0 -> ϕµ(±)e(∓) the first being set. In addition, limits are reported for scalar and left-handed lepton-flavour violating New Physics scenarios.

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