Search for rare B(s)0→μ+μ -μ+μ- decays

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, Y. Amhis, L. Anderlini, J. Anderson, R. AndreassenR. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, S. Bachmann, J. J. Back, C. Baesso, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, Th Bauer, A. Bay, J. Beddow, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, M. Benayoun, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, M. O. Bettler, M. Van Beuzekom, A. Bien, S. Bifani, T. Bird, A. Bizzeti, P. M. Bjørnstad, T. Blake, F. Blanc, J. Blouw, S. Blusk, A. Bobrov, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, S. Borghi, A. Borgia, T. J.V. Bowcock, E. Bowen, C. Bozzi, T. Brambach, J. Van Den Brand, J. Bressieux, D. Brett, M. Britsch, T. Britton, N. H. Brook, H. Brown, I. Burducea, A. Bursche, J. Buytaert, S. Cadeddu, O. Callot, M. Calvi, M. Calvo Gomez, A. Camboni, P. Campana, A. Carbone, G. Carboni, R. Cardinale, A. Cardini, H. Carranza-Mejia, L. Carson, K. Carvalho Akiba, G. Casse, M. Cattaneo, Ch Cauet

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Resumen

A search for the decays Bs 0→μ +μ -μ +μ - and B 0→μ +μ -μ +μ - is performed using data, corresponding to an integrated luminosity of 1.0 fb -1, collected with the LHCb detector in 2011. The number of candidates observed is consistent with the expected background and, assuming phase-space models of the decays, limits on the branching fractions are set: B(Bs 0→μ +μ -μ +μ -)<1.6(1.2) ×10 -8 and B(B 0→μ +μ -μ +μ -)<6.6(5.3)×10 -9 at 95% (90%) confidence level. In addition, limits are set in the context of a supersymmetric model which allows for the B(s) 0 meson to decay into a scalar (S) and pseudoscalar particle (P), where S and P have masses of 2.5 GeV/c and 214.3 MeV/c, respectively, both resonances decay into μ +μ -. The branching fraction limits for these decays are B(Bs 0→SP)<1.6(1.2)×10 -8 and B(B 0→SP)<6.3(5.1)×10 -9 at 95% (90%) confidence level.

Idioma originalEnglish
Número de artículo211801
PublicaciónPhysical Review Letters
Volumen110
N.º21
DOI
EstadoPublished - 21 may 2013
Publicado de forma externa

All Science Journal Classification (ASJC) codes

  • Física y Astronomía General

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