Evidence for the two-body charmless baryonic decay B<SUP>+</SUP> → p(Λ)over-bar

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V and Zucchelli, S (2017) Evidence for the two-body charmless baryonic decay B<SUP>+</SUP> → p(Λ)over-bar. JOURNAL OF HIGH ENERGY PHYSICS, 04 (4). 162-.

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Abstract

A search for the rare two-body charmless baryonic decay $B^+ \to p \bar\Lambda$ is performed with $pp$ collision data, corresponding to an integrated luminosity of $3\,\mbox{fb}^{-1}$, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. An excess of $B^+ \to p \bar\Lambda$ 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 $B^+ \to K^0_{\mathrm S} \pi^+$ decay for normalisation, is \begin{eqnarray} \mathcal{B}(B^+ \to p \bar\Lambda) & = & ( 2.4 \,^{+1.0}_{-0.8} \pm 0.3 ) \times 10^{-7} \,, \nonumber \end{eqnarray} where the first uncertainty is statistical and the second systematic.

Item Type:	Article
Additional Information:	All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-048.html
Uncontrolled Keywords:	B physics, Branching fraction, Flavor physics, Hadron-Hadron scattering (experiments)
Depositing User:	Symplectic Admin
Date Deposited:	30 May 2017 07:42
Last Modified:	12 Oct 2023 17:53
DOI:	10.1007/JHEP04(2017)162
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3007623