TY - JOUR

T1 - Search for diphoton decays of an axionlike particle in radiative J/ψ decays

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Николаев, Иван Борисович

AU - Мучной, Николай Юрьевич

PY - 2024/8/6

Y1 - 2024/8/6

N2 - We search for the diphoton decay of a light pseudoscalar axionlike particle, a, in radiative J/ψ decays, using 1010 J/ψ events collected with the BESIII detector. We find no evidence of a signal and set upper limits at the 95% confidence level on the product branching fraction B(J/ψ→γa)×B(a→γγ) and the axionlike particle photon coupling constant gaγγ in the ranges of (3.7-48.5)×10-8 and (2.2-101.8)×10-4 GeV-1, respectively, for 0.18≤ma≤2.85 GeV/c2. These are the most stringent limits to date in this mass region.

AB - We search for the diphoton decay of a light pseudoscalar axionlike particle, a, in radiative J/ψ decays, using 1010 J/ψ events collected with the BESIII detector. We find no evidence of a signal and set upper limits at the 95% confidence level on the product branching fraction B(J/ψ→γa)×B(a→γγ) and the axionlike particle photon coupling constant gaγγ in the ranges of (3.7-48.5)×10-8 and (2.2-101.8)×10-4 GeV-1, respectively, for 0.18≤ma≤2.85 GeV/c2. These are the most stringent limits to date in this mass region.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85200860122&origin=inward&txGid=846c5b618d7cc303c2ec30b59cd4cc05

U2 - 10.1103/PhysRevD.110.L031101

DO - 10.1103/PhysRevD.110.L031101

M3 - Article

VL - 110

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 3

M1 - L031101

ER -