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Article
Report number arXiv:1612.07818 ; CERN-EP-2016-302 ; LHCB-PAPER-2016-052
Title Search for long-lived scalar particles in B+K+χ(μ+μ) decays
Author(s) LHCb Collaboration  Visualizza tutti i 768 autori
Publication 2017-04-14
Imprint 2016-12-22
Number of pages 9
Note 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-2016-052.html
In: Phys. Rev. D 95 (2017) 071101
DOI 10.1103/PhysRevD.95.071101
Subject category hep-ex ; Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Abstract A search for a long-lived scalar particle χ is performed, looking for the decay B+K+χ with χμ+μ in pp collision data corresponding to an integrated luminosity of 3fb1, collected by the LHCb experiment at centre-of-mass energies of s=7 and 8TeV. 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)<4700MeV/c2 and lifetime 0.1<τ(χ)<1000ps. 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 2×1010 and 107. These are the most stringent limits to date. The limits are interpreted in the context of a model with a light inflaton particle.
Copyright/License preprint: © 2016-2024 CERN (License: CC-BY-4.0)
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publication: © 2017-2024 The Author(s) (License: CC-BY-4.0)



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 Record creato 2016-12-27, modificato l'ultima volta il 2024-08-17


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