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. These searches look for A→μ+μ-decays using a data sample corresponding to an integrated luminosity of 5.5 fb-1 collected with the LHCb detector. Neither search finds evidence for a signal, and 90% confidence-level exclusion limits are placed on the γ-A kinetic mixing strength. The promptlike A search explores the mass region from near the dimuon threshold up to 70 GeV and places the most stringent constraints to date on dark photons with 214<m(A)â‰740 MeV and 10.6<m(A)â‰30 GeV. The search for long-lived A→μ+μ-decays places world-leading constraints on low-mass dark photons with lifetimes O(1) ps.

Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Search for A →μ+μ-Decays. PHYSICAL REVIEW LETTERS, 124(4) [10.1103/PhysRevLett.124.041801].

Search for A →μ+μ-Decays

Borsato M.;Calvi M.;Carniti P.;Fazzini D.;Gotti C.;Martinazzoli L.;Martinelli M.;Meloni S.;Petruzzo M.;
2020

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. These searches look for A→μ+μ-decays using a data sample corresponding to an integrated luminosity of 5.5 fb-1 collected with the LHCb detector. Neither search finds evidence for a signal, and 90% confidence-level exclusion limits are placed on the γ-A kinetic mixing strength. The promptlike A search explores the mass region from near the dimuon threshold up to 70 GeV and places the most stringent constraints to date on dark photons with 214
Articolo in rivista - Articolo scientifico
lhcb
English
29-gen-2020
2020
124
4
041801
none
Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2020). Search for A →μ+μ-Decays. PHYSICAL REVIEW LETTERS, 124(4) [10.1103/PhysRevLett.124.041801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/289341
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