Search for A ' -> mu(+)mu(-) decays
File(s)
Published version
Author(s)
Type
Journal Article
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
<
m
(
A
′
)
≲
740
MeV
and
10.6
<
m
(
A
′
)
≲
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
.
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
′
)
≲
740
MeV
and
10.6
<
m
(
A
′
)
≲
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
.
Date Issued
2020-01-29
Date Acceptance
2020-01-06
Citation
Physical Review Letters, 2020, 124 (4), pp.041801-1-041801-12
ISSN
0031-9007
Publisher
American Physical Society
Start Page
041801-1
End Page
041801-12
Journal / Book Title
Physical Review Letters
Volume
124
Issue
4
Copyright Statement
© 2020 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000510176700003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
VECTOR GAUGE BOSON
PHI-MESON DECAYS
DARK PHOTON
EXCLUSION LIMITS
HEAVY NEUTRINOS
MASS RANGE
U-GAMMA
PARTICLES
E(+)E(-)
FORCES
Publication Status
Published
Article Number
ARTN 041801
Date Publish Online
2020-01-29