Observation of X(3872)→J/ψγ and search for X(3872)→ψ'γ in B decays.

@article{Bhardwaj2011ObservationOX,
  title={Observation of X(3872)→J/ψγ and search for X(3872)→ψ'γ in B decays.},
  author={Vipin Bhardwaj and Kaled Trabelsi and Jai Bhagwan Singh and S K Choi and Stephen Lars Olsen and Ichiro Adachi and Kristin Adamczyk and David M. Asner and Vladimir Aulchenko and T. A.-Kh. Aushev and Tariq Aziz and A. M. Bakich and Elisabetta Barberio and K. S. Belous and Bikram Pratim Bhuyan and M. Bischofberger and A. T. Bondar and M. Bracko and J. Brodzicka and Thomas E. Browder and Augustine E. Chen and Peng Chen and B. G. Cheon and Kyung Chul Cho and Yoon Kyung Choi and J. Dalseno and Zdenek Dolezal and Simon Eidelman and D. A. Epifanov and Vivek Gaur and N. N. Gabyshev and Bo{\vs}tjan Golob and John Haba and Kazuhiro Hayasaka and Hisaki Hayashii and Yuji Horii and Yusuke Hoshi and W. S. Hou and Y. B. Hsiung and H. J. Hyun and Toru Iijima and Katsuaki Inami and Akimasa Ishikawa and M. Iwabuchi and Yoshihito Iwasaki and Taiki Iwashita and Nikhil J. Joshi and Tim Julius and J. H. Kang and Takeo Kawasaki and Christian Kiesling and Hyunwoo Kim and J. B. Kim and Joon Hyun Kim and Kwanghee Kim and M. J. Kim and Se Kwon Kim and Youngmin Kim and Kenichi Kinoshita and Bumsuk Ko and Nobuhiko Kobayashi and Samo Korpar and Peter Kri{\vz}an and Rajender Kumar and Tetsuro Kumita and Andrey I. Kuzmin and Y -J Kwon and J. S. Lange and Matthew J. Lee and S. E. Lee and Yanxi Li and J. F. Libby and C-L Lim and D. Liventsev and remi. louvot and Daria A. Matvienko and Sarah L McOnie and Kenkichi Miyabayashi and Hiroyuki Miyata and Yoshiyuki Miyazaki and Roman Mizuk and Gagan B. Mohanty and Roberto Mussa and E. Nakano and Mikihiko Nakao and Hideo Nakazawa and Zbigniew Natkaniec and C. Ng and Shohei Nishida and Osamu Nitoh and Takayuki Nozaki and Takayoshi Ohshima and Sin-ichiro Okuno and Yoshichika Ōnuki and Galina Pakhlova and C. W. Park and H. K. Park and Rok Pestotnik and Marko Petric and Leo Piilonen and M. Roehrken and Himansu Bhusan Sahoo and Keiichi Sakai and Yasuhiro Sakai and Tomoyuki Sanuki and O. Rienhoff U. Piccolo B. Schneider and C. Schwanda and O. Seon and M. M. Shapkin and V. E. Shebalin and T A Shibata and J. G. Shiu and B. A. Shwartz and P. Smerkol and Y -S Sohn and Alexei Sokolov and Elena Solovieva and Svjetlana Stanic and M. Stari{\vc} and Takayuki Sumiyoshi and Gocha Tatishvili and Yoshiki Teramoto and M. M. M. Uchida and Shozo Uehara and T. Uglov and Yasushi Unno and S. Uno and Yu. A. Usov and Gary Varner and A. Vossen and Xuelei Wang and Masaru Watanabe and Yoshio Watanabe and Kathryn M. Williams and Bruce Yabsley and Yasushi Yamashita and Cheng Yuan and Chaobo Zhang and Zi-wei Zhang and V. N. Zhilich and P. L. Zhou and Vladimir Zhulanov and A. Zupanc},
  journal={Physical review letters},
  year={2011},
  volume={107 9},
  pages={091803}
}
We report a study of B→(J/ψγ)K and B→(ψ'γ)K decay modes using 772×10⁶ B ̅B events collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We observe X(3872)→J/ψγ and report the first evidence for χ(c2)→J/ψγ in B→(X_{c ̅cγ)K decays, while in a search for X(3872)→ψ'γ no significant signal is found. We measure the branching fractions, B(B(±)→X(3872)K(±))B(X(3872)→J/ψγ)=(1.78(-0.44)(+0.48)±0.12)×10(-6), B(B(±)→χ(c2)K(±))=(1.11(-0.34)(+0.36)±0.09)×10… CONTINUE READING