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Evidence for the two-body charmless baryonic decay $B^+ \to p\overline{\Lambda}$


LHCb Collaboration; Bernet, R; Müller, K; Serra, N; Steinkamp, O; Straumann, U; Vollhardt, A; et al (2017). Evidence for the two-body charmless baryonic decay $B^+ \to p\overline{\Lambda}$. Journal of High Energy Physics, 04:162.

Abstract

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

Abstract

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

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2017
Deposited On:29 Jan 2018 13:56
Last Modified:19 Feb 2018 10:43
Publisher:Springer
ISSN:1029-8479
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1007/JHEP04(2017)162

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