Search for invisible decays of a dark photon using e+e- annihilation data at BESIII
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Date
2023
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Access Rights
info:eu-repo/semantics/openAccess
Abstract
We report a search for a dark photon using 14.9 fb(-1) of e(+)e(-) annihilation data taken at center-of-mass energies from 4.13 to 4.60 GeV with the BESIII detector operated at the BEPCII storage ring. The dark photon is assumed to be produced in the radiative annihilation process of e(+)e(-) and to predominantly decay into light dark matter particles, which escape from the detector undetected. The mass range from 1.5 to 2.9 GeV is scanned for the dark photon candidate, and no significant signal is observed. The mass dependent upper limits at the 90% confidence level on the coupling strength parameter epsilon for a dark photon coupling with an ordinary photon vary between 1.6 x 10(-3) and 5.7 x 10(-3). (c) 2023 The Author(s). Published by Elsevier B.V.
Description
Keywords
Dark Sector, Dark Photon, Invisible Decays
Journal or Series
Physics Letters B
WoS Q Value
N/A
Scopus Q Value
Q1
Volume
839
