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Using 9.0 fb(-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) -> chi psi(3823). No signal is observed and the upper limit on the ratio of branching fractions B(chi(c1) (3872) -> chi psi(2) (3823), psi(2) (3823) -> gamma chi(c1)/B chi(c1)(3872) -> pi(+)pi(-) J/psi) is set at 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).
Olivier Schneider, Aurelio Bay, Guido Haefeli, Tatsuya Nakada, Frédéric Blanc, Lesya Shchutska, Elena Graverini, Marie Theres Christin Bachmayer, Sebastian Schulte, Aravindhan Venkateswaran, Yunxuan Song, Luis Miguel Garcia Martin, Vitalii Lisovskyi, Sonia Amina Bouchiba, Federico Ronchetti, Anni Matilda Kauniskangas, Raphaël van Laak, Ettore Zaffaroni, Pierre Paul Louis Mayencourt, Gianluca Zunica, Abdul-Kerim Guseinov, Radoslav Marchevski, Roberto Ribatti, Andrea Merli, Dimitrios Kaminaris, Spencer Edward Collaviti
Jan Steggemann, Konstantin Androsov, Anna Mascellani, Joanna Malgorzata Wanczyk
Jan Steggemann, Konstantin Androsov, Anna Mascellani