Search for Hidden-Sector Bosons in B0→K0μ+μ− Decays

A search is presented for hidden-sector bosons, χ , produced in the decay B 0 → K ∗ ( 892 ) 0 χ , with K ∗ ( 892 ) 0 → K + π − and χ → μ + μ − . The search is performed using p p -collision data corresponding to 3.0     fb − 1 collected with the LHCb detector. No significant signal is observed in th...

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Bibliographic Details
Published in:Physical review letters 2015-10, Vol.115 (16)
Main Authors: Badalov, Alexey, Calvo Gómez, Míriam, Garrido Beltrán, Lluís, Gascón Fora, David, Graciani Díaz, Ricardo, Graugés Pous, Eugeni, Marin Benito, Carla, Picatoste Olloqui, Eduardo, Rives Molina, Vicente José, Vilasis-Cardona, Xavier, LHCb Collaboration
Format: Article
Language:English
Subjects:
Experiments
Física de partícules
Particle physics
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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Summary:A search is presented for hidden-sector bosons, χ , produced in the decay B 0 → K ∗ ( 892 ) 0 χ , with K ∗ ( 892 ) 0 → K + π − and χ → μ + μ − . The search is performed using p p -collision data corresponding to 3.0     fb − 1 collected with the LHCb detector. No significant signal is observed in the accessible mass range 214 ≤ m ( χ ) ≤ 4350     MeV , and upper limits are placed on the branching fraction product B ( B 0 → K ∗ ( 892 ) 0 χ ) × B ( χ → μ + μ − ) as a function of the mass and lifetime of the χ boson. These limits are of the order of 1 0 − 9 for χ lifetimes less than 100 ps over most of the m ( χ ) range, and place the most stringent constraints to date on many theories that predict the existence of additional low-mass bosons.
ISSN:0031-9007
1079-7114