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Search for dark photons produced in 13 TeV pp collisions
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LHCb Collaboration (Including: Back, J. J., Blake, Thomas, Costa Sobral, Cayo, Crocombe, Andrew, Gershon, T. J., Kreps, Michal, Latham , T. E. , Loh, David, Mathad, Abhijit , Millard, E., O'Hanlon, Daniel P., Poluektov, Anton, Qian, W., Wallace, Charlotte and Wicht, Jean). (2018) Search for dark photons produced in 13 TeV pp collisions. Physical Review Letters, 120 (6). 061801. doi:10.1103/PhysRevLett.120.061801 ISSN 0031-9007.
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Official URL: http://doi.org/10.1103/PhysRevLett.120.061801
Abstract
Searches are performed for both promptlike and long-lived dark photons, A^{'}, produced in proton-proton collisions at a center-of-mass energy of 13 TeV, using A^{'}→μ^{+}μ^{-} decays and a data sample corresponding to an integrated luminosity of 1.6 fb^{-1} collected with the LHCb detector. The promptlike A^{'} search covers the mass range from near the dimuon threshold up to 70 GeV, while the long-lived A^{'} search is restricted to the low-mass region 214<m(A^{'})<350 MeV. No evidence for a signal is found, and 90% confidence level exclusion limits are placed on the γ-A^{'} kinetic-mixing strength. The constraints placed on promptlike dark photons are the most stringent to date for the mass range 10.6<m(A^{'})<70 GeV, and are comparable to the best existing limits for m(A^{'})<0.5 GeV. The search for long-lived dark photons is the first to achieve sensitivity using a displaced-vertex signature.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
SWORD Depositor: | Library Publications Router | ||||||
Journal or Publication Title: | Physical Review Letters | ||||||
Publisher: | American Physical Society | ||||||
ISSN: | 0031-9007 | ||||||
Official Date: | 9 February 2018 | ||||||
Dates: |
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Volume: | 120 | ||||||
Number: | 6 | ||||||
Article Number: | 061801 | ||||||
DOI: | 10.1103/PhysRevLett.120.061801 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) |
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