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Production of the X(3872) state via the B0→K*0X(3872) decay

Luciano M. Abreu*

  • *Contact author: luciano.abreu@ufba.br

Phys. Rev. D 112, 096002 – Published 3 November, 2025

DOI: https://doi.org/10.1103/76ll-n7yw

Abstract

In this work the production of the state X(3872) is estimated via the reaction B0→K*0X(3872) through triangle mechanisms described by the sequence B0→Ds(*)+(→K*0D(*)+)D(*)−→K*0(D(*)+D(*)−)→K*0X(3872). The molecular configuration (DD¯*−c.c.) of the X(3872) is considered. By means of the effective Lagrangian approach, the branching ratio B(B0→K*0X(3872)) is calculated as a function of the strength of the coupling of the charged components (D+D¯*−−c.c.) to the X(3872) and compared with experimental data. Besides, employing the decay B0→K*0ψ(2S) as a normalization channel, the ratio of branching fractions R=B(B0→K*0X(3872))B(B0→K*0ψ(2S))×B(X(3872)→J/ψπ+π−)B(ψ(2S)→J/ψπ+π−) is also estimated. The findings provide another concrete example for the vital role of charged components in achieving a quantitatively correct description of the X(3872).

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