Search for a light exotic particle inJ/ψradiative decays
Citations Over TimeTop 10% of 2012 papers
Abstract
Using a data sample containing $1.06\ifmmode\times\else\texttimes\fi{}{10}^{8}$ ${\ensuremath{\psi}}^{\ensuremath{'}}$ events collected with the BESIII detector at the BEPCII electron-positron collider, we search for a light exotic particle $X$ in the process ${\ensuremath{\psi}}^{\ensuremath{'}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}J/\ensuremath{\psi}$, $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}X$, $X\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$. This light particle $X$ could be a Higgs-like boson ${A}^{0}$, a spin-1 $U$ boson, or a pseudoscalar sgoldstino particle. In this analysis, we find no evidence for any ${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ mass peak between the mass threshold and $3.0\text{ }\text{ }\mathrm{GeV}/{c}^{2}$. We set 90%-confidence-level upper limits on the product-branching fractions for $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}{A}^{0}$, ${A}^{0}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ which range from $4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}7}$ to $2.1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$, depending on the mass of ${A}^{0}$, for $M({A}^{0})<3.0\text{ }\text{ }\mathrm{GeV}/{c}^{2}$. Only one event is seen in the mass region below $255\text{ }\text{ }\mathrm{MeV}/{c}^{2}$, and this has a ${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ mass of $213.3\text{ }\text{ }\mathrm{MeV}/{c}^{2}$ and the product-branching-fraction upper limit $5\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}7}$.
Related Papers
- → Multipleb-jets reveal top superpartners and the 125 GeV Higgs(2013)7 cited
- → A 96 GeV Higgs Boson in the 2HDM plus Singlet(2021)4 cited
- → Higgs, di-Higgs and tri-Higgs production via SUSY processes at the LHC\n with 14 TeV(2015)1 cited
- → Finding CP-violating Higgses(1999)
- → Higgs, di-Higgs and tri-Higgs production via SUSY processes at the LHC with 14 TeV(2015)