Search for Hidden-Sector Bosons in B-0 -> K*(0)mu(+)mu(-) Decays

A search is presented for hidden-sector bosons, chi, produced in the decay B-0 -> K*(892)(0)chi, with K*(892)(0) -> K+pi(-) and chi -> mu(+)mu(-). The search is performed using pp-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(chi) <= 4350 MeV, and upper limits are placed on the branching fraction product B(B-0 -> K*(892)(0)chi) X B(chi -> mu(+)mu(-)) as a function of the mass and lifetime of the chi boson. These limits are of the order of 10(-9) for chi lifetimes less than 100 ps over most of the m(chi) range, and place the most stringent constraints to date on many theories that predict the existence of additional low-mass bosons.


Published in:
Physical Review Letters, 115, 16, 161802
Year:
2015
Publisher:
College Pk, American Physical Society
ISSN:
0031-9007
Laboratories:




 Record created 2015-12-02, last modified 2018-01-28


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