Search for the $$ {B}_s^0 $$ → μ+μ−γ decay

• Autor: Adefisoye, A. A. ; Amalric, R. ; Amhis, Y. ; Andreotti, M. ; Arguedas Cuendis, S. ; Artamonov, A. ; Aslanides, E. ; Bartz, J. ; Bassi, G. ; Belov, I. ; Belyaev, I. ; Bertella, C. ; Birch, M. ; Blake, T. ; Brundu, D. ; Buonaura, A. ; Buonincontri, L. ; Cambon Bouzas, J. I. ; Chubykin, A. ; Clemencic, M. ; Cottee Meldrum, J. J. ; Craik, D. C. ; Dadabaev, S. ; Davies, J. E. ; Deschamps, O. ; Eckstein, E. ; Eisenhardt, S. ; Feo, M. ; Fischer, K. M. ; Garau, M. ; Golobardes, E. ; Guarise, M. ; Haimberger, J. ; Hammerich, J. ; Harrison, T. ; Henderson, R. D. L. ; Hou, R. ; Hushchyn, M. ; Jaimes Elles, S. J. ; Jost, B. ; Kandybei, S. ; Kharisova, A. ; Kholodenko, S. ; Kleijne, N. ; Kupsc, A. ; Lacarrere, D. ; Lancierini, D. ; Lane, R. ; Leverington, B. ; Lisovskyi, V. ; Liu, Q. ; Lobo Salvia, A. ; Lomba Castro, J. ; Lopes, J. H. ; Maccolini, S. ; Manuzzi, D. ; Marconi, U. ; Martinelli, M. ; Martinez Vidal, F. ; Mathad, A. ; Maurice, E. ; Mayencourt, P. ; Minucci, E. ; Monteil, S. ; Mu, Z. M. ; Nanut, T. ; Obraztsov, V. ; Oliva, F. ; Paolucci, L. ; Pappalardo, L. L. ; Perret, P. ; Pfaller, J. P. ; Prouve, C. ; Qin, N. ; Ren, Z. ; Ruiz Diaz, M. ; Schmelling, M. ; Sergi, A. ; Serra, N. ; Seuthe, A. ; Sharma, R. S. ; Shears, T. ; Shmanin, E. ; Shorkin, R. ; Skwarnicki, T. ; Souza De Almeida, F. L. ; Spiridenkov, E. ; Sriskaran, V. ; Tilquin, H. ; Toscano, L. ; Unverzagt, D. J. ; Wagner, J. ; Wang, J. ; Wang, N. W. ; Wang, X. W. ; Witek, M. ; Xiang, Z. ; Xu, M. ; Yeroshenko, V. ; Zhang, L.
• É parte de: The journal of high energy physics, 2024-07, Vol.2024 (7), Article 101
• Descrição: A bstract A search for the fully reconstructed {B}_s^0 B s 0 → μ + μ − γ decay is performed at the LHCb experiment using proton-proton collisions at \sqrt{s} s = 13 TeV corresponding to an integrated luminosity of 5 . 4 fb − 1 . No significant signal is found and upper limits on the branching fraction in intervals of the dimuon mass are set {\displaystyle \begin{array}{cc}\mathcal{B}\left({B}_s^0\to {\mu}^{+}{\mu}^{-}\gamma \right)<4.2\times {10}^{-8},& m\left({\mu}^{+}{\mu}^{-}\right)\in \left[2{m}_{\mu },1.70\right]\textrm{GeV}/{c}^2,\\ {}\mathcal{B}\left({B}_s^0\to {\mu}^{+}{\mu}^{-}\gamma \right)<7.7\times {10}^{-8},&\ m\left({\mu}^{+}{\mu}^{-}\right)\in \left[\textrm{1.70,2.88}\right]\textrm{GeV}/{c}^2,\\ {}\mathcal{B}\left({B}_s^0\to {\mu}^{+}{\mu}^{-}\gamma \right)<4.2\times {10}^{-8},& m\left({\mu}^{+}{\mu}^{-}\right)\in \left[3.92,{m}_{B_s^0}\right]\textrm{GeV}/{c}^2,\end{array}} B B s 0 → μ + μ − γ < 4.2 × 10 − 8 , m μ + μ − ∈ 2 m μ 1.70 GeV / c 2 , B B s 0 → μ + μ − γ < 7.7 × 10 − 8 , m μ + μ − ∈ 1.70, 2.88 GeV / c 2 , B B s 0 → μ + μ − γ < 4.2 × 10 − 8 , m μ + μ − ∈ 3.92 m B s 0 GeV / c 2 , at 95% confidence level. Additionally, upper limits are set on the branching fraction in the [2 m μ , 1 . 70] GeV /c 2 dimuon mass region excluding the contribution from the intermediate ϕ (1020) meson, and in the region combining all dimuon-mass intervals.
  
• Idioma: Inglês