期刊
PHYSICAL REVIEW LETTERS
卷 120, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.061801
关键词
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资金
- CERN
- CAPES (Brazil)
- CNPq (Brazil)
- FAPERJ (Brazil)
- FINEP (Brazil)
- MOST (China)
- NSFC (China)
- CNRS/IN2P3 (France)
- BMBF (Germany)
- DFG (Germany)
- MPG (Germany)
- INFN (Italy)
- NWO (The Netherlands)
- MNiSW (Poland)
- NCN (Poland)
- MEN/IFA (Romania)
- MinES (Russia)
- FASO (Russia)
- MinECo (Spain)
- SNSF (Switzerland)
- SER (Switzerland)
- NASU (Ukraine)
- STFC (United Kingdom)
- NSF (USA)
- AvH Foundation (Germany)
- EPLANET (European Union)
- Marie Sklodowska-Curie Actions (European Union)
- ERC (European Union)
- ANR
- Labex P2IO
- ENIGMASS
- OCEVU
- Region Auvergne-Rhone-Alpes (France)
- RFBR (Russia)
- Yandex LLC (Russia)
- GVA
- XuntaGal (Spain)
- GENCAT (Spain)
- Herchel Smith Fund
- Royal Society
- English-Speaking Union
- Leverhulme Trust (United Kingdom)
- STFC [1707993, ST/J004332/1, LHCb Upgrades, ST/N000331/1, ST/N000242/1, LHCb, ST/K003410/1, ST/G005974/1, 1641747, ST/N000463/1, ST/H006737/1, 1796908] Funding Source: UKRI
- Science and Technology Facilities Council [GRIDPP, 1397914, ST/N000331/1, LHCb Upgrades, 1416165, ST/N000463/1, ST/N000250/1, ST/K003410/1, LHCb, ST/J004332/1, ST/H006737/1, 1641747, ST/N000242/1, 1565116] Funding Source: researchfish
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' -> mu(+)mu(-) 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 < mo(A') < 350 MeV. No evidence for a signal is found, and 90% confidence level exclusion limits are placed on the gamma-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.
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