Observation of B_{c}^{+}→D^{0}K^{+} Decays.



Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M ORCID: 0000-0002-8148-2392, Ali, S, Alkhazov, G
et al (show 760 more authors) (2017) Observation of B_{c}^{+}→D^{0}K^{+} Decays. Physical review letters, 118 (11). 111803 - ?.

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Abstract

Using proton-proton collision data corresponding to an integrated luminosity of 3.0  fb^{-1}, recorded by the LHCb detector at center-of-mass energies of 7 and 8 TeV, the B_{c}^{+}→D^{0}K^{+} decay is observed with a statistical significance of 5.1 standard deviations. By normalizing to B^{+}→D[over ¯]^{0}π^{+} decays, a measurement of the branching fraction multiplied by the production rates for B_{c}^{+} relative to B^{+} mesons in the LHCb acceptance is obtained, R_{D^{0}K}=(f_{c}/f_{u})×B(B_{c}^{+}→D^{0}K^{+})=(9.3_{-2.5}^{+2.8}±0.6)×10^{-7}, where the first uncertainty is statistical and the second is systematic. This decay is expected to proceed predominantly through weak annihilation and penguin amplitudes, and is the first B_{c}^{+} decay of this nature to be observed.

Item Type: Article
Uncontrolled Keywords: LHCb Collaboration
Depositing User: Symplectic Admin
Date Deposited: 07 Apr 2017 13:06
Last Modified: 18 Oct 2021 07:15
DOI: 10.1103/physrevlett.118.111803
URI: https://livrepository.liverpool.ac.uk/id/eprint/3006874