Search for a $CP$-odd light Higgs boson in $J/\psi \to \gamma A^0$

Ablikim, M.; Achasov, M.N.; Adlarson, P.; Ahmed, S.; Albrecht, M.; Aliberti, R.; Amoroso, A.; An, M.R.; An, Q.; Bai, X.H.

doi:10.1103/PhysRevD.105.012008

Search for a $CP$ -odd light Higgs boson in $J/\psi \to \gamma A^0$

BESIII

Collaboration

Sep 26, 2021

9 pages

Published in:

Phys.Rev.D 105 (2022) 1, 012008

Published: Jan 1, 2022

e-Print:

2109.12625 [hep-ex]

DOI:

10.1103/PhysRevD.105.012008 (publication)

PDG:

{{\mathit J / \psi}{(1S)}}

\rightarrow

{{\mathit \gamma}}{{\mathit A}^{0}}

\rightarrow

{{\mathit \gamma}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}

Report number:

BAM-0481

Experiments:

BEPC-BES-III

View in:

pdf

reference search17 citations

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Abstract: (APS)

Using

J / ψ

radiative decays from 9.0 billion

J / ψ

events collected by the BESIII detector, we search for di-muon decays of a

C P

-odd light Higgs boson (

A^{0}

), predicted by many new physics models beyond the Standard Model, including the next-to-minimal supersymmetric Standard Model. No evidence for the

C P

-odd light Higgs production is found, and we set 90% confidence level upper limits on the product branching fraction

B (J / ψ \to γ A^{0}) \times B (A^{0} \to μ^{+} μ^{-})

in the range of

(1.2 - 778.0) \times 10^{- 9}

for

0.212 \leq m_{A^{0}} \leq 3.0 GeV / c^{2}

. The new measurement is a 6–7 times improvement over our previous measurement, and is also slightly better than the BABAR measurement in the low-mass region for

\tan β = 1

.

Note:

9 pages, 5 figures, accepted by Phys. Rev. D

electron positron: annihilation
electron positron: colliding beams
new physics: search for
Higgs particle: doublet
Higgs particle: leptonic decay
muon: pair production
mass spectrum: (muon+ muon-)
supersymmetry: parameter space
J/psi(3100): branching ratio
Higgs particle: branching ratio

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