First Observation and Measurement of the Branching Fraction for the Decay B[subscript s][superscript 0] → D[subscript s][superscript ∗] ∓ K[superscript ±]
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JHEP06(2015)130.pdf
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Author(s)
Ilten, Philip J
Williams, Michael
Date Issued
June 2015
Journal
Journal of High Energy Physics
Publisher
Springer Nature
Citation
The LHCb collaboration, et al. “First Observation and Measurement of the Branching Fraction for the Decay B[subscript s][superscript 0] → D[subscript s][superscript ∗] ∓ K[superscript ±].” Journal of High Energy Physics, vol. 2015, no. 6, June 2015. © 2015 The Authors
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Final published version
Abstract
The first observation of the B[subscript s][superscript 0] → D[subscript s][superscript ∗] ∓ K[superscript ±] decay is reported using 3.0 fb[superscript −1] of proton-proton collision data collected by the LHCb experiment. The D [subscript s][superscript ∗ ∓] mesons are reconstructed through the decay chain D[subscript s][superscript ∗ ∓] → γD[subscript s][superscript ∓] (K[superscript ∓] K[superscript ±] π[superscript ∓]). The branching fraction relative to that for B[subscript s][superscript 0] → D[subscript s][superscript ∗ −] π[superscript +] decays is measured to be
B(B[superscript 0][subscript s] →D[subscript s][superscript ∗][superscript ∓]K[superscript ±])/B(B[superscript
0][superscript s]→D[superscript ∗-][subscript s]π[superscript +])=0.068±0.005+0.003−0.002,
where the first uncertainty is statistical and the second is systematic. Using a recent measurement of B(B[superscript 0][subscript s]→D[subscript s][superscript ∗−]π[superscript +]) , the absolute branching fraction of B[subscript s][superscript 0] → D[subscript s][superscript ∗ ∓] K[superscript ±] is measured as
B(B[superscript 0][subscript s]→D[subscript s][superscript ∗∓]K[superscript ±])=(16.3±1.2(stat)+0.7−0.5(syst)±4.8(norm))×10[superscript −5],
where the third uncertainty is due to the uncertainty on the branching fraction of the normalisation channel. Keywords: Branching fraction, B physics, Flavor physics, Hadron-Hadron Scattering
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1007/JHEP06(2015)130
