First evidence for the two-body charmless baryonic decay B[superscript 0] → p[line over p]
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Author(s)
Williams, Michael
Alternative Title
First evidence for the two-body charmless baryonic decay B0→ pp
Date Issued
October 2013
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag/SISSA
Citation
The LHCb collaboration et al. “First Evidence for the Two-Body Charmless Baryonic Decay B[superscript 0] → to P[line over P].” Journal of High Energy Physics 2013.10 (2013): n. pag. © 2013 CERN for the benefit of the LHCb collaboration
Version
Final published version
Abstract
The results of a search for the rare two-body charmless baryonic decays B[superscript 0]→p[line over p] and B[superscript 0][subscript s] →p[line over p] are reported. The analysis uses a data sample, corresponding to an integrated luminosity of 0.9 fb[superscript −1], of pp collision data collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. An excess of B[superscript 0]→p[line over p] candidates with respect to background expectations is seen with a statistical significance of 3.3 standard deviations. This is the first evidence for a two-body charmless baryonic B[superscript 0] decay. No significant B[superscript 0][subscript s] → p[line over p] signal is observed, leading to an improvement of three orders of magnitude over previous bounds. If the excess events are interpreted as signal, the 68.3% confidence level intervals on the branching fractions are
B(B[superscript 0] →p[line over p])=1.47[superscript
+0.62+0.35][subscript −0.51−0.14] × 10[superscript −8],
B(B[superscript 0]→p[line over p])=1.47[subscript −0.51−0.14][superscript +0.62+0.35] × 10[superscript −8], where the first uncertainty is statistical and the second is systematic.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
http://dx.doi.org/10.1007/jhep10(2013)005
