Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/132476
Title: | Search for Dark Photons Produced in 13 TeV pp Collisions |
Author: | Alfonso Albero, Alejandro Calvo Gómez, Míriam Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni LHCb Collaboration Marin Benito, Carla |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 8-Feb-2018 |
Publisher: | American Physical Society |
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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.120.061801 |
It is part of: | Physical Review Letters, 2018, vol. 120, num. 6, p. 061801 |
URI: | http://hdl.handle.net/2445/132476 |
Related resource: | https://doi.org/10.1103/PhysRevLett.120.061801 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Enginyeria Electrònica i Biomèdica) |
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