2023/05/19 by BESIII Collaboration, Ablikim, M., Achasov, M. N. +609
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)
paper · doi:10.48550/arxiv.2305.11682
Using a data sample corresponding to an integrated luminosity of 2.93 fb-1 collected at a center-of-mass energy of 3.773~GeV with the BESIII detector at the BEPCII collider, we search for a scalar partner of the X(3872), denoted as X(3700), via ψ(3770)→ γηη' and γπ+π-J/ψ processes. No significant signals are observed and the upper limits of the product branching fractions \cal B(ψ(3770)→γX(3700))⋅ \cal B(X(3700)→ ηη') and \cal B(ψ(3770)→γX(3700))⋅ \cal B(X(3700)→π+π-J/ψ) are determined at the 90% confidence level, for the narrow X(3700) with a mass ranging from 3710 to 3740 MeV/c2, which are from 0.8 to 1.8 (× 10-5) and 0.9 to 3.4 (× 10-5), respectively.