2025/12/17 by BESIII Collaboration, Ablikim, M., Achasov, M. N. +685
Physics and Astronomy · #Quantum Chromodynamics and Particle Interactions #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies
paper · doi:10.48550/arxiv.2512.15091
Using a 10.9 fb-1 data sample collected by the BESIII detector at center-of-mass energies from 4.16 to 4.34 GeV, we search for the charmless decays X(3872) → KS0K±π∓ and K^*(892)K, where the X(3872) is produced via the radiative process e+e- → γX(3872). No significant signal is observed. We set upper limits on the relative branching fractions B[X(3872)→ KS K± π∓]/B[X(3872)→π+π- J/ψ] <0.07 and B[X(3872)→ K^* (892)K]/B[X(3872)→ π+π- J/ψ] <0.10 at the 90% confidence level. Additionally, upper limits on the product of the cross section σ[e+e-→γX(3872)] and the branching fractions B[X(3872)→ KS0K±π∓] and B[X(3872)→ K^*(892)K] are reported at each energy point. In all cases, K^*(892)K refers to the sum of the modes K^*(892)+K-+c.c. and K^*(892)0K0+c.c., where c.c. denotes the corresponding charge-conjugate modes.