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Measurement of the B0s--u+u- Branching Fraction and Search for B0--u+u- with the CMS Experiment

Abstract: Results are presented from a search for the rare decays Bs0??+?- and B0??+? - in pp collisions at ?s=7 and 8 TeV, with data samples corresponding to integrated luminosities of 5 and 20 fb-1, respectively, collected by the CMS experiment at the LHC. An unbinned maximum-likelihood fit to the dimuon invariant mass distribution gives a branching fraction B(Bs0??+?-)=(3.0-0.9+1.0) ×10-9, where the uncertainty includes both statistical and systematic contributions. An excess of Bs0??+?- events with respect to background is observed with a significance of 4.3 standard deviations. For the decay B0??+?- an upper limit of B(B0??+?-)<1.1×10 -9 at the 95% confidence level is determined. Both results are in agreement with the expectations from the standard model.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: Chatrchyan S., Khachatryan V., Sirunyan A.M., Tumasyan A., Adam W., Bergauer T., Dragicevic M., Erö J., Fabjan C., Friedl M., Frühwirth R., Ghete V.M., Hörmann N., Hrubec J., Jeitler M., Kiesenhofer W., Knünz V., Krammer M., Krätschmer I., Liko D., Mikulec I., Rabady D., Rahbaran B., Rohringer C., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Treberer-Treberspurg W., Waltenberger W., Wulz C.E., Mossolov V., Shumeiko N., Suare

 Fuente: Physical Review Letters, 2013, 111(10),101804

Editorial: American Physical Society

 Fecha de publicación: 01/09/2013

Nº de páginas: 17

Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevLett.111.101804

ISSN: 0031-9007,1079-7114

Url de la publicación: https://doi.org/10.1103/PhysRevLett.111.101804