Journal article
Search for long-lived scalar particles in B+→K+χ(μ+μ−) decays
- Abstract:
- A search for a long-lived scalar particle χ is performed, looking for the decay B+→K+χ with χ→μ+μ- in pp 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 532.6KB, Terms of use)
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- Publisher copy:
- 10.1103/PhysRevD.95.071101
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review D More from this journal
- Volume:
- 95
- Issue:
- 7
- Pages:
- 071101
- Publication date:
- 2017-04-01
- Acceptance date:
- 2017-03-13
- DOI:
- EISSN:
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2470-0029
- ISSN:
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2470-0010
- Keywords:
- Pubs id:
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pubs:667644
- UUID:
-
uuid:8e2f0296-9a12-4c97-8ba3-22c33b1efef1
- Local pid:
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pubs:667644
- Source identifiers:
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667644
- Deposit date:
-
2017-11-03
Terms of use
- Copyright holder:
- CERN, for the LHCb Collaboration
- Copyright date:
- 2017
- Notes:
- © 2017 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
- Licence:
- CC Attribution (CC BY)
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