Observation of B[superscript +][subscript c] → D[superscript 0]K[superscript +] Decays
Name
PhysRevLett.118.111803.pdf
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Ali, S.
Alkhazov, G.
Alternative Title
Observation of B+c → D0K+ Decays
Date Issued
March 2017
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R. et al. “Observation of B[superscript +][subscript c] → D[superscript 0]K [superscript +] Decays.” Physical Review Letters 118.11 (2017): n. pag. © 2017 CERN for the LHCb Collaboration
Version
Final published version
Abstract
Using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb[superscript -1], recorded by the LHCb detector at center-of-mass energies of 7 and 8 TeV, the B[superscript +][subscript c] → D[superscript 0]K[superscript +] decay is observed with a statistical significance of 5.1 standard deviations. By normalizing to B[superscript +] →[bar over D][superscript 0]π[superscript +] decays, a measurement of the branching fraction multiplied by the production rates for B[superscript +][subscript c] relative to B[superscript +] mesons in the LHCb acceptance is obtained, R[subscript D[superscript 0]K] =(f[subscript c]/f[subscript u])×B(B[superscript +][subscript c] →D[superscript 0]K[superscript +]) =(9.3[superscript +2.8][subscript -2.5] ± 0.6) × 10[superscript -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[superscript +][subscript c] decay of this nature to be observed.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.118.111803
