摘要
We investigate the decays of B^(0)→K^(0)X(3872)and B^(+)→K^(+)X(3872)based on the picture where the X(3872)resonance is strongly coupled to the DD*+c.c.channel.In addition to the decay mechanism where the X(3872)resonance is formed from the DD*pair hadronization with the short-distance interaction,we have also considered the DD*rescattering diagrams in the long-distance scale,where D andD*are formed from c andDD*separately.Because of the difference of the mass thresholds of charged and neutralDD*channels,and the rather narrow width of the X(3872)resonance,at the X(3872)mass,the loop functions ofD^(0)D*^(0)andD^(+)D*^(-)are much different.Taking this difference into account,the ratio of B[B^(0)→K^(0)X(3872)]/B[B+→K+X(3872)]■0.5 can be naturally obtained.Based on this result,we also evaluate the decay widths of B_s^(0)→η(η′)X(3872).It is expected that future experimental measurements of these decays can be used to elucidate the nature of the X(3872)resonance.
作者
王镐楠
耿立升
王倩
谢聚军
Hao-Nan Wang;Li-Sheng Geng;Qian Wang;Ju-Jun Xie(Guangdong Provincial Key Laboratory of Nuclear Science,Institute of Quantum Matter,South China Normal University,Guangzhou 510006,China;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Peng Huanwu Collaborative Center for Research and Education,Beihang University,Beijing 100191,China;School of Physics,Beihang University,Beijing 102206,China;Beijing Key Laboratory of Advanced Nuclear Materials and Physics,Beihang University,Beijing 102206,China;Guangdong-Hong Kong Joint Laboratory of Quantum Matter,Southern Nuclear Science Computing Center,South China Normal University,Guangzhou 510006,China;Theoretical Physics Center for Science Facilities,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;School of Nuclear Sciences and Technology,University of Chinese Academy of Sciences,Beijing 101408,China)
基金
the National Natural Science Foundation of China(Grant Nos.12075288,11735003,11961141012,12035007,11975041,and 11961141004)
the Youth Innovation Promotion Association CAS,Guangdong Provincial Fund(Grant No.2019QN01×172)
the Science and Technology Program of Guangzhou(Grant No.2019050001)
supported by the the National Natural Science Foundation of China
the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation)through the funds provided to the Sino-German Collaborative Research Center TRR110“Symmetries and the Emergence of Structure in QCD”(Grant Nos.12070131001 and ID 196253076-TRR 110)。
