Search for the radiative transition ${\chi }_{c1}(3872)\to \gamma {\psi }_2(3823)$

Abstract

Using 9.0 $\mathrm{f}{\mathrm{b}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at center-of-mass energies from 4.178 to 4.278 GeV with the BESIII detector at the BEPCII collider, we perform the first search for the radiative transition ${\chi }_{c1}(3872)\to \gamma {\psi }_2(3823)$. No ${\chi }_{c1}(3872)\to \gamma {\psi }_2(3823)$ signal is observed. The upper limit on the ratio of branching fractions $\mathcal{B}({\chi }_{c1}(3872)\to \gamma {\psi }_2(3823),{\psi }_2(3823)\to \gamma {\chi }_{c1})/\mathcal{B}({\chi }_{c1}(3872)\to {\pi }^{+}{\pi }^{-}J/\psi )$ is set as 0.075 at the 90\% confidence level. Our result contradicts theoretical predictions under the assumption that the ${\chi }_{c1}(3872)$ is the pure charmonium state ${\chi }_{c1}(2P)$.

arXiv comment8 pages, 2 figures

References in corpus (27)

• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Higher Charmonia
• Limits and Confidence Intervals in the Presence of Nuisance Parameters
• The New Heavy Mesons: A Status Report
• Determination of the X(3872) meson quantum numbers
• Higher Charmonia and X,Y,Z states with Screened Potential
• The X(3872) boson: Molecule or charmonium
• Observation of $e^{+}{e}^{-}\to \gamma X(3872)$ at BESIII
• Evidence for the decay X(3872) --> J/psi omega
• Diagnostic Decays of the X(3872)
• Evidence for X(3872) --> psi(2S) gamma in B+/- --> X(3872) K+/- decays, and a study of B --> ccbar gamma K
• Bounds on the width, mass difference and other properties of X(3872) --> pi+pi-J/psi decays
• Study of Resonances in Exclusive B Decays to Dbar(*)D(*)K
• Observation of $X(3872)\to J/\psi \gamma$ and search for $X(3872)\to {\psi }^{\prime }\gamma$ in B decays
• Study of the lineshape of the ${\chi }_{c1}(3872)$ state
• Study of the $B\to X(3872)(\to D^{\ast 0}{\bar{D}}^0)K$ decay
• Study of $e^{+}{e}^{-}\to \gamma \omega J/\psi$ and Observation of $X(3872)\to \omega J/\psi$
• Measurement of integrated luminosities at BESIII for data samples at center-of-mass energies between 4.0 and 4.6 GeV
• Study of open-charm decays and radiative transitions of the X(3872)
• Observation of the decay $X(3872)\to {\pi }^0{\chi }_{c1}(1P)$
• Determination of the absolute branching fractions of X(3872) decays
• Measurements of the Absolute Branching Fractions of $B^{\pm }\to K^{\pm }{X}_{c\bar{c}}$
• Search for new decay modes of the ${\psi }_2(3823)$ and the process $e^{+}{e}^{-}\to {\pi }^0{\pi }^0{\psi }_2(3823)$