Measurement of the \(B^0_s\to\mu^+\mu^-\) decay properties and search for the \(B^0\to\mu^+\mu^-\) and \(B^0_s\to\mu^+\mu^-\gamma\) decays

• Published in: arXiv.org 2022-02
• Main Authors: collaboration, LHCb, Alexander, M, P Baladron Rodriguez, Baldini, W, Beiter, A, Bertella, C, Bhasin, S, Bitadze, A, Blago, M P, Borsato, M, Buonaura, A, Carbone, A, Cardinale, R, Cardini, A, Casse, G, Celani, S, Clarke, P E L, Coelho, J A B, Congedo, L, Decamp, D, L Del Buono, Douglas, L, Esen, S, Evans, T, Ferrari, F, S Ferreres Sole, Fini, R A, Funk, W, Garau, M, P Garcia Moreno, B Garcia Plana, Gerstel, D, Gong, G, Haefeli, G, Harrison, T, Hollitt, S E, Jacobsson, R, Jiang, F, Johnson, D, Kang, Y, Konoplyannikov, A, Kudryavtsev, V, Lampis, A, Langenbruch, C, S Li, Liu, S, R Ma, Mackowiak, P, Malde, S, Mariani, S, Martinelli, M, Matev, R, Mathad, A, McCann, M, Minotti, A, Morello, G, Morris, A B, Morris, A G, Nikitin, N, Palano, A, Pan, Y, Pappalardo, L L, Parker, W, Patel, M, Pawley, C J, Perazzini, S, Petric, M, Pica, L, Poliakova, M, Qian, W, Rinnert, K, Robbe, P, Robertson, G, C Sanchez Gras, Santimaria, M, Savrina, D, Scantlebury Smead, L G, Schiller, M, Shangase, D M, Shchutska, L, Skidmore, N, Smetkina, A, Stefko, P, Steinkamp, O, Ukleja, A, Ursov, E, Uwer, U, Valassi, A, Velthuis, J J, Vesterinen, M, Walsh, J, Westhenry, B D C, White, D J, Williams, M, Wormser, G, Wotton, S A, Yin, H, Zeng, M, Zhang, Y, Zunica, G
• Format: Article
• Language: English
• Subjects: Confidence intervals; Decay; Large Hadron Collider; Particle collisions; Protons; Statistical analysis
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2108.09283

An improved measurement of the decay \(B^0_s\to\mu^+\mu^-\) and searches for the decays \(B^0\to\mu^+\mu^-\) and \(B^0_s\to\mu^+\mu^-\gamma\) are performed at the LHCb experiment using data collected in proton-proton collisions at \(\sqrt{s} = 7,~8\) and \(13\) TeV, corresponding to integrated luminosities of 1, 2 and 6 fb\(^{-1}\), respectively. The \(B^0_s\to\mu^+\mu^-\) branching fraction and effective lifetime are measured to be \({\mathcal{B}}(B^0_s\to\mu^+\mu^-)=\left(3.09^{+0.46+0.15}_{-0.43-0.11}\right)\times 10^{-9}\) and \(\tau(B^0_s\to\mu^+\mu^-)=(2.07\pm 0.29\pm 0.03)\) ps, respectively, where the uncertainties include both statistical and systematic contributions. No significant signal for \(B^0\to\mu^+\mu^-\) and \(B^0_s\to\mu^+\mu^-\gamma\) decays is found and the upper limits \(\mathcal{B}(B^0\to\mu^+\mu^-)