Study of B0S Meson Decays to J/ψΚ+Κ-π+ π- Final State
https://doi.org/10.56304/S2079562920060433
Abstract
The decays of B0S → J/ψΚ+Κ−π+π− are studied using a data set corresponding to an integrated luminosity of 9 fb−1 collected by the LHCb experiment in proton−proton collisions between 2011 and 2018. The decays B0S → J/ψΚ*0Κ*0 and B0S → xc l(3872)Κ+Κ− where the Κ+Κ− pair does not originate from the ϕ meson are observed for the first time. Precise measurements of the branching fraction ratios between B0S → J/ψΚ*0Κ*0, 0S → xc l(3872)ф and B0S → xc l(3872)Κ+Κ− channels are reported. A structure denoted X(4740) is observed in the J/ψϕ mass spectrum with a significance in excess of 5.3 standard deviation. In addition, the most precise measurement of the B0S meson mass in made.
About the Authors
Т. A. Ovsiannikova
National Research Centre “Kurchatov Institute”
Russian Federation
Russian Federation
123182; Moscow
I. M. Belyaev
National Research Centre “Kurchatov Institute”
Russian Federation
Russian Federation
123182; Moscow
D. Yu. Golubkov
National Research Centre “Kurchatov Institute”
Russian Federation
Russian Federation
123182; Moscow
References
1. Choi S.K. et al. // Phys. Rev. Lett. 2003. V. 91. P. 262001.
2. Aaij R. et al. // Phys. Rev. Lett. 2015. V. 115. P. 072001.
3. Aaij R. et al. // Phys. Rev. Lett. 2019. V. 122. P. 222001.
4. Chilikin K. et al. // Phys. Rev. D. 2013. V. 88. P. 074026.
5. Aaij R. et al. // Eur. Phys. J. C. 2018. V. 78. P. 1019.
6. Aaij R. et al. // Phys. Rev. Lett. 2017. V. 118. P. 022003.
7. Aaij R. et al. // J. High Energy Phys. 2020. V. 2020 (8). P. 123.
8. Pereima D. // Search for New Decays of Beauty Particles at the LHCb Experiment. PhD Thesis. 2020. Moscow: NRC Kurch. Inst. CERN-THESIS-2020-204.
9. Aaij R. et al. // Phys. Lett. B. 2012. V. 708. P. 241.
10. Sirunyan A.M. et al. // Phys. Rev. Lett. 2020. V. 125. P. 152001.
11. Aaij R. et al. // Phys. Rev. Lett. 2019. V. 122. P. 191804.
Review
For citations:
Ovsiannikova Т.A., Belyaev I.M., Golubkov D.Yu. Study of B0S Meson Decays to J/ψΚ+Κ-π+ π- Final State. Nuclear Physics and Engineering. 2021;12(3):170-174. (In Russ.) https://doi.org/10.56304/S2079562920060433
Views:
43
Email this article 