Measurement of the Bs0→J/ψKS0 Effective Lifetime from Proton-Proton Collisions at √s = 13 TeV

Journal of High Energy Physics 2024
Kārlis Dreimanis, Antra Gaile, Conrado Munoz Diaz, Dace Osīte, Guntis Pikurs, Andris Potrebko, Markus Seidel, Dimitrios Sidiropoulos Kontos, CMS Collaboration

The effective lifetime of the Bs0 meson in the decay Bs0→J/ψKS0 is measured using data collected during 2016–2018 with the CMS detector in s = 13 TeV proton-proton collisions at the LHC, corresponding to an integrated luminosity of 140 fb−1. The effective lifetime is determined by performing a two-dimensional unbinned maximum likelihood fit to the Bs0 meson invariant mass and proper decay time distributions. The resulting value of 1.59 ± 0.07(stat) ± 0.03(syst) ps is the most precise measurement to date and is in good agreement with the expected value.

Keywords
B Physics | Hadron-Hadron Scattering | Lifetime
DOI
10.1007/JHEP10(2024)247
Hyperlink
https://link.springer.com/article/10.1007/JHEP10(2024)247

The CMS Collaboration, Hayrapetyan, A., Dreimanis, K., Gaile, A., Munoz Diaz, C., Osīte, D., Pikurs, G., Potrebko, A., Seidel, M., Sidiropoulos Kontos, D., ... [et al.] Measurement of the Bs0→J/ψKS0 Effective Lifetime from Proton-Proton Collisions at √s = 13 TeV. Journal of High Energy Physics, 2024, Vol. 2024, No. 10, Article number 247. ISSN 1029-8479. Pieejams: doi:10.1007/JHEP10(2024)247

Publication language
English (en)