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Evidence for the two-body charmless baryonic decay B[superscript +] →p[bar over Λ]

Author(s)
Boettcher, Thomas Julian; Ilten, Philip J
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Abstract
A search for the rare two-body charmless baryonic decay B[superscript +] → p[bar over Λ] is performed with pp collision data, corresponding to an integrated luminosity of 3 fb [superscript −1], collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. An excess of B[superscript +] →p[bar overΛ] candidates with respect to background expectations is seen with a statistical significance of 4.1 standard deviations, and constitutes the first evidence for this decay. The branching fraction, measured using the B[superscript +] →K[subscript S[superscript 0]]π[superscript +] decay for normalisation, B(B[superscript +] → p[bar over Λ]) = (2.4[superscript +1.0][subscript −0.8] ± 0.3) × 10[superscript −7], where the first uncertainty is statistical and the second systematic. Keywords: B physics, Branching fraction, Flavor physics, Hadron-Hadron scattering (experiments)
Date issued
2017-04
URI
http://hdl.handle.net/1721.1/115248
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
The LHCb collaboration, et al. “Evidence for the Two-Body Charmless Baryonic Decay B[superscript +] → p[bar over Λ].” Journal of High Energy Physics, vol. 2017, no. 4, Apr. 2017. © 2017 The Authors
Version: Final published version
ISSN
1029-8479

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