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

A search for the rare two-body charmless baryonic decay B+→pΛ¯¯¯¯B+→pΛ¯ {B}^{+}\to p\overline{\varLambda} 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+→pΛ¯¯¯¯B+→pΛ¯...

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Main Authors: Aaij, Roel (Author) , D'Argent, Philippe (Author) , Bachmann, Sebastian (Author) , Braun, Svende (Author) , Britsch, Markward (Author) , Comerma-Montells, Albert (Author) , De Cian, Michel (Author) , Esen, Sevda (Author) , Gerick, David (Author) , Gersabeck, Evelina (Author) , Han, Xiaoxue (Author) , Hansmann-Menzemer, Stephanie (Author) , Kecke, Matthieu (Author) , Khanji, Basem (Author) , Kolpin, Michael (Author) , Kreplin, Katharina (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Meißner, Marco (Author) , Mitzel, Dominik (Author) , Neubert, Sebastian (Author) , Neuner, Max (Author) , Nikodem, Thomas (Author) , Piucci, Alessio (Author) , Schiller, Manuel (Author) , Seyfert, Paul (Author) , Stahl, Marian (Author) , Tilburg, Jeroen van (Author) , Uwer, Ulrich (Author) , Vesterinen, Mika (Author) , Waldi, Roland (Author) , Zhelezov, Alexey (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: April 28, 2017
In: Journal of high energy physics
Year: 2017, Issue: 4
ISSN:1029-8479
DOI:10.1007/JHEP04(2017)162
Online Access:Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1007/JHEP04(2017)162
Verlag, kostenfrei, Volltext: https://doi.org/10.1007/JHEP04(2017)162
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Author Notes:the LHCb Collaboration
Description
Summary:A search for the rare two-body charmless baryonic decay B+→pΛ¯¯¯¯B+→pΛ¯ {B}^{+}\to p\overline{\varLambda} 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+→pΛ¯¯¯¯B+→pΛ¯ {B}^{+}\to p\overline{\varLambda} 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 + → K S 0 π + decay for normalisation, is B(B+→pΛ¯¯¯¯)=(2.4+1.0−0.8±0.3)×10−7,B(B+→pΛ¯)=(2.4−0.8+1.0±0.3)×10−7, \mathrm{\mathcal{B}}\left({B}^{+}\to p\overline{\varLambda}\right)=\left(2.{4}_{-0.8}^{+1.0}\pm 0.3\right)\times 1{0}^{-7}, where the first uncertainty is statistical and the second systematic. Open image in new window
Item Description:Im Titel hat "lambda" einen Überstrich und ist als griechischer Buchstabe dargestellt
The LHCb Collaboration: R. Aaij, P. d’Argent, S. Bachmann, S. Braun, M. Britsch, A. Comerma-Montells, M. De Cian, S. Esen, D.Gerick, E. Gersabeck, O. Grünberg, X.Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, M. Kolpin, K. Kreplin, B. Leverington, J. Marks, M. Meissner, D.S. Mitzel, S. Neubert, M. Neuner, T. Nikodem, A. Piucci, P. Seyfert, M. Schiller, M. Stahl, J. v. Tilburg, U. Uwer, M. Vesterinen, R. Waldi, A. Zhelezov [und weitere]
Im Titel ist das Zeichen "plus" hochgestellt
Im Titel wird "Lambda" als griechischer Buchstabe dargestellt
Gesehen am 15.11.2018
Physical Description:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP04(2017)162

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