Novel approaches to determine $B^{\pm }$ and $B^0$ meson production fractions

Journal Article · 08 July 2024 · Physical Review. D.

DOI: https://doi.org/10.1103/PhysRevD.110.014007 · OSTI ID:2396362

Bernlochner, Florian; Jung, Martin ; Khan, Munira ; Landsberg, Greg ; Ligeti, Zoltan

We propose novel methods to determine the $\mathrm{\Upsilon }\left(4S\right)\to B^{+}{B}^{-}$ and $\mathrm{\Upsilon }\left(4S\right)\to B^0{\overline{B}}^0$ decay rates. The precision to which they and their ratio are known yields at present a limiting uncertainty around 2% in measurements of absolute $B$ decay rates, and thus in a variety of applications, such as precision determinations of elements of the Cabibbo-Kobayashi-Maskawa matrix and flavor-symmetry relations. The new methods we propose are based in one case on exploiting the $\mathrm{\Upsilon }\left(5S\right)$ datasets, in the other case on the different average number of charged tracks in $B^{\pm }$ and $B^0$ decays. We estimate future sensitivities using these methods and discuss possible measurements of $f_d/f_u$ at the (HL-)LHC. Published by the American Physical Society 2024

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: Federal Ministry of Education and Research (BMBF); German Research Foundation (DFG); Italian Ministry of Research (MIUR); USDOE; USDOE Office of Science (SC), High Energy Physics (HEP)
• Grant/Contract Number: AC02-05CH11231; SC0010010
• OSTI ID: 2396362
• Journal Information: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 1 Vol. 110; ISSN PRVDAQ; ISSN 2470-0010
• Publisher: American Physical SocietyCopyright Statement
• Country of Publication: United States
• Language: English