Measurement of the dependence of the hadron production fraction ratio $$f_\mathrm{s} / f_\mathrm{u}$$ and $$f_\mathrm{d} / f_ \mathrm{u}$$ on B meson kinematic variables in proton-proton collisions at $$\sqrt{s}$$ = 13 TeV
Journal Article
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· Physical Review Letters
The dependence of the ratio between the B$$_\mathrm{s}^0$$ and B$^+$ hadron production fractions, $$f_\mathrm{s} / f_\mathrm{u}$$, on the transverse momentum ($$p_\mathrm{T}$$) and rapidity of the B mesons is studied using the decay channels B$$_\mathrm{s}^0$$$$\to$$ J$$/\psi\,\phi$$ and B$^+$$$$\to$$ J$$/\psi$$ K$^+$. The analysis uses a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CMS experiment in 2018 and corresponding to an integrated luminosity of 61.6 fb$$^{-1}$$. The $$f_\mathrm{s} / f_\mathrm{u}$$ ratio is observed to depend on the B $$p_\mathrm{T}$$ and to be consistent with becoming asymptotically constant at large $$p_\mathrm{T}$$. No rapidity dependence is observed. The ratio of the B$^0$ to B$^+$ hadron production fractions, $$f_\mathrm{d} / f_\mathrm{u}$$, measured using the B$^0$$$$\to$$ J$$/\psi$$ K$$^{*0}$$ decay channel, is found to be consistent with unity and independent of $$p_\mathrm{T}$$ and rapidity, as expected from isospin invariance.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- CMS Collaboration
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 2203107
- Report Number(s):
- FERMILAB-PUB--22-707-CMS; CMS-BPH-21-001; CERN-EP-2022-248; arXiv:2212.02309; oai:inspirehep.net:2610522
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 131; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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