Evidence for the decay $B^0 \to μ^+ μ^-$ and improved measurements of the decay $B^0_s \to μ^+ μ^-$

LHCb collaboration; R. Aaij; M. Abdelfatah; A. S. W. Abdelmotteleb; C. Abellan Beteta; F. Abudinén; T. Ackernley; A. A. Adefisoye; B. Adeva; M. Adinolfi; P. Adlarson; C. Agapopoulou; L. Ahrens; C. A. Aidala; S. Akar; K. Akiba; H. Al Saleh; P. Albicocco; J. Albrecht; R. Aleksiejunas; F. Alessio; P. Alvarez Cartelle; A. A. Alves; S. Amato; Y. Amhis; Z. Amos; L. An; L. Anderlini; P. Andreola; M. Andreotti; S. Andres Estrada; A. Anelli; C. Arata; F. Archilli; Z. Areg; M. Argenton; S. Arguedas Cuendis; L. Arnone; M. Artuso; E. Aslanides; R. Ataíde Da Silva; M. Atzeni; B. Audurier; J. A. Authier; D. Bacher; I. Bachiller Perea; S. Bachmann; J. J. Back; M. Bai; Z. B. Bai; V. Balagura; A. Balboni; W. Baldini; L. Balzani; H. Bao; J. Baptista de Souza Leite; C. Barbero Pretel; I. R. Barbosa; W. Barker; R. J. Barlow; M. Barnyakov; S. Baron; S. Barsuk; W. Barter; J. Bartz; S. Bashir; B. Batsukh; P. B. Battista; A. Bavarchee; A. Bay; A. Beck; M. Becker; F. Bedeschi; I. B. Bediaga; N. A. Behling; S. Belin; A. Bellavista; I. Belyaev; G. Bencivenni; E. Ben-Haim; J. L. M. Berkey; R. Bernet; A. Bertolin; L. Bertsch; F. Betti; J. Bex; O. Bezshyyko; S. Bhattacharya; M. S. Bieker; N. V. Biesuz; A. Biolchini; M. Birch; F. C. R. Bishop; A. Bitadze; A. Bizzeti; F. Blanc; J. E. Blank; S. Blusk; J. A. Boelhauve; O. Boente Garcia

AI summary · arXiv: 2611.00230v1 · hep-ex

Evidence for the decay $B^0 \to μ^+ μ^-$ and improved measurements of the decay $B^0_s \to μ^+ μ^-$

LHCb collaboration, R. Aaij, M. Abdelfatah, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. Adefisoye,

and 121 more authors

B. Adeva, M. Adinolfi, P. Adlarson, C. Agapopoulou, L. Ahrens, C. A. Aidala, S. Akar, K. Akiba, H. Al Saleh, P. Albicocco, J. Albrecht, R. Aleksiejunas, F. Alessio, P. Alvarez Cartelle, A. A. Alves, S. Amato, Y. Amhis, Z. Amos, L. An, L. Anderlini, P. Andreola, M. Andreotti, S. Andres Estrada, A. Anelli, C. Arata, F. Archilli, Z. Areg, M. Argenton, S. Arguedas Cuendis, L. Arnone, M. Artuso, E. Aslanides, R. Ataíde Da Silva, M. Atzeni, B. Audurier, J. A. Authier, D. Bacher, I. Bachiller Perea, S. Bachmann, J. J. Back, M. Bai, Z. B. Bai, V. Balagura, A. Balboni, W. Baldini, L. Balzani, H. Bao, J. Baptista de Souza Leite, C. Barbero Pretel, I. R. Barbosa, W. Barker, R. J. Barlow, M. Barnyakov, S. Baron, S. Barsuk, W. Barter, J. Bartz, S. Bashir, B. Batsukh, P. B. Battista, A. Bavarchee, A. Bay, A. Beck, M. Becker, F. Bedeschi, I. B. Bediaga, N. A. Behling, S. Belin, A. Bellavista, I. Belyaev, G. Bencivenni, E. Ben-Haim, J. L. M. Berkey, R. Bernet, A. Bertolin, L. Bertsch, F. Betti, J. Bex, O. Bezshyyko, S. Bhattacharya, M. S. Bieker, N. V. Biesuz, A. Biolchini, M. Birch, F. C. R. Bishop, A. Bitadze, A. Bizzeti, F. Blanc, J. E. Blank, S. Blusk, J. A. Boelhauve, O. Boente Garcia, T. Boettcher, A. Bohare, C. Bolognani, R. B. Bonacci, A. Bordelius, F. Borgato, S. Borghi, M. Borsato, E. Bottalico, M. Bovill, T. J. V. Bowcock, A. Boyer, C. Bozzi, J. D. Brandenburg, A. Brea Rodriguez, N. Breer, C. Breitfeld, J. Brodzicka, J. Brown, E. Buchanan, M. Burgos Marcos, C. Burr, E. Butera, C. Buti, J. S. Butter, W. Byczynski, S. Cadeddu, H. Cai, Y. Cai

Original paper Submitted to arXiv on 30 Oct. 2026 All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://lhcb-glance.cern.ch/alcm/public/analysis/full-details/6370/ (LHCb public pages) License: CC BY 4.0

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Weekly letter Presented in "Particles, nuclei and gravitation this week" of 9 November 2026. Particles, nuclei and gravitation this week: rare decays and the shape of the unseen

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