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Title: Search for Hidden-Sector Bosons in B0→K*0μ+μ− Decays
Author: 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
Keywords: Física de partícules
Particle physics
Issue Date: 16-Oct-2015
Publisher: American Physical Society
Abstract: 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.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2015, vol. 115, num. 16, p. 161802
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Electrònica)
Articles publicats en revistes (Física Quàntica i Astrofísica)

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