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http://hdl.handle.net/2445/186426
Title: | Search for long-lived scalar particles in B+→K+χ (μ+μ-) decays |
Author: | Calvo Gomez, M. Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José Alfonso Albero, Alejandro Gironella Gironell, P. Vazquez Gomez, R. LHCb Collaboration |
Keywords: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
Issue Date: | Apr-2017 |
Publisher: | American Physical Society |
Abstract: | A search for a long-lived scalar particle χ is performed, looking for the decay B+→K+χ with χ →μ+μ- in p p 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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.95.071101 |
It is part of: | Physical Review D, 2017, vol. 95, num. 071101, p. 1-15 |
URI: | http://hdl.handle.net/2445/186426 |
Related resource: | https://doi.org/10.1103/PhysRevD.95.071101 |
ISSN: | 2470-0010 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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677991.pdf | 1.01 MB | Adobe PDF | View/Open |
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