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Search for long-lived scalar particles in B+→K+[chi]([mu]+[mu]−) decays

A search for a long-lived scalar particle χ is performed, looking for the decay B+→K+χ with χ→μ+μ− in pp collision data corresponding to an integrated luminosity of 3 fb−1, collected by the LHCb experiment at center-of-mass energies of √s=7 and 8 TeV. This new scalar particle, predicted by hidden se...

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Main Authors: Aaij, Roel (Author) , D'Argent, Philippe (Author) , Bachmann, Sebastian (Author) , Braun, Svende (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) , Kreplin, Katharina (Author) , Leverington, Blake (Author) , Marks, Jörg (Author) , Mitzel, Dominik (Author) , Neubert, Sebastian (Author) , Neuner, Max (Author) , Nikodem, Thomas (Author) , Piucci, Alessio (Author) , Stahl, Marian (Author) , Stemmle, Simon (Author) , Uwer, Ulrich (Author) , Zhelezov, Alexey (Author) , Vesterinen, Mika (Author)
Corporate Author: LHCb Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 14 April 2017
In: Physical review
Year: 2017, Volume: 95, Issue: 7
ISSN:2470-0029
DOI:10.1103/PhysRevD.95.071101
Online Access:Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevD.95.071101
Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.95.071101
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Author Notes:R. Aaij et al.* (LHCb Collaboration)
Description
Summary:A search for a long-lived scalar particle χ is performed, looking for the decay B+→K+χ with χ→μ+μ− in pp collision data corresponding to an integrated luminosity of 3 fb−1, collected by the LHCb experiment at center-of-mass energies of √s=7 and 8 TeV. This new scalar particle, predicted by hidden sector models, is assumed to have a narrow width. The signal would manifest itself as an excess in the dimuon invariant mass distribution over the Standard Model background. No significant excess is observed in the accessible ranges of mass 250<m(χ)<4700 MeV/c2 and lifetime 0.1<τ(χ)<1000 ps. Upper limits on the branching fraction B(B+→K+χ(μ+μ−)) at 95% confidence level are set as a function of m(χ) and τ(χ), varying between 2×10−10 and 10−7. These are the most stringent limits to date. The limits are interpreted in the context of a model with a light inflaton particle.
Item Description:Im Titel sind "+" und "-" hochgestellt
Im Titel werden "chi" und "mu" als griechische Buchstaben dargestellt
R. Aaij, P. d'Argent, S. Bachmann, S. Braun, A. Comerma-Montells, M. De Cian, S. Esen, D. Gerick, E. Gersabeck, X. Han, S. Hansmann-Menzemer, M. Kecke, B. Khanji, K. Kreplin, B. Leverington, J. Marks, D.S. Mitzel, S. Neubert, M. Neuner, T. Nikodem, A. Piucci, M. Stahl, S. Stemmle, U. Uwer, M. Vesterinen, A. Zhelezov [und weitere]
Gesehen am 22.10.2020
Physical Description:Online Resource
ISSN:2470-0029
DOI:10.1103/PhysRevD.95.071101

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