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We present here a preliminary Monte Carlo (MC) simulation study of \(X(3872)\rightarrow J/\psi \gamma \) and \(X(3872)\rightarrow \psi (2S)\gamma \) in the decay of \(B\rightarrow (c\bar{c}\gamma )K\) where B stands for \(B^{\pm }\) , \(B^0\) and K stands for \(K^\pm \) , \(K^0_S\) . The previous Belle measurement did not find any significant signal for \(X(3872)\rightarrow \psi (2S)\gamma \) . We plan to measure the ratio of BF \(R_{\psi \gamma }=\{\mathcal {B}(X(3872)\rightarrow \psi (2S)\gamma )/\mathcal {B}(X(3872)\rightarrow J/\psi \gamma )\}\) to probe the nature of the state combining the B-meson data collected by the Belle (and the Belle II) detectors which is expected to increase the sensitivity and significance. \(B\rightarrow \chi _{c1,c2}K\) where \(\chi _{c1,c2}\rightarrow J/\psi \gamma \) will be used as calibration mode.

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Study of Radiative Decays of X(3872) Using the Belle and the Belle II Detectors

  • 会议论文

  • 发表日期：

    2025年

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  • Sourabh Chutia,
  • Vishal Bhardwaj

摘要

We present here a preliminary Monte Carlo (MC) simulation study of \(X(3872)\rightarrow J/\psi \gamma \) and \(X(3872)\rightarrow \psi (2S)\gamma \) in the decay of \(B\rightarrow (c\bar{c}\gamma )K\) where B stands for \(B^{\pm }\) , \(B^0\) and K stands for \(K^\pm \) , \(K^0_S\) . The previous Belle measurement did not find any significant signal for \(X(3872)\rightarrow \psi (2S)\gamma \) . We plan to measure the ratio of BF \(R_{\psi \gamma }=\{\mathcal {B}(X(3872)\rightarrow \psi (2S)\gamma )/\mathcal {B}(X(3872)\rightarrow J/\psi \gamma )\}\) to probe the nature of the state combining the B-meson data collected by the Belle (and the Belle II) detectors which is expected to increase the sensitivity and significance. \(B\rightarrow \chi _{c1,c2}K\) where \(\chi _{c1,c2}\rightarrow J/\psi \gamma \) will be used as calibration mode.