Observation of the Decays and
The first observation of the decays Λ$$^0_b$$ → $$χ$$c1$pK$- and Λ$$^0_b$$ → $$χ$$c2$pK$- is reported using a data sample corresponding to an integrated luminosity of 3.0 fb-1, collected by the LHCb experiment in $pp$ collisions at center-of-mass energies of 7 and 8 TeV. The following ratios of branching fractions are measured: $$$$\frac{\mathscr{B}(Λ^0_b→Χ_{c1}pK^-)}{\mathscr{B}(Λ^0_b→J/ψpK^-)}=0.242 ± 0.014 ± 0.013 ± 0.009$$$$ $$$$\frac{\mathscr{B}(Λ^0_b→Χ_{c2}pK^-)}{\mathscr{B}(Λ^0_b→J/ψpK^-)}= 0.248 ± 0.020 ± 0.014 ± 0.009$$$$ $$$$\frac{\mathscr{B}(Λ^0_b→Χ_{c2}pK^-)}{\mathscr{B}(Λ^0_b→Χ_{c1}pK^-)}= 1.02 ± 0.10 ± 0.02 ± 0.05$$$$ where the first uncertainty is statistical, the second systematic, and the third due to the uncertainty on the branching fractions of the $$Χ_{c1}$$ → $Jψγ$ and $$Χ_{c2}$$ → $Jψγ$ decays. Using both decay modes, the mass of the Λ$$^0_b$$ baryon is also measured to be $$m$$Λ$$^0_b$$ = 5619.44 ± 0.28 ± 0.26 MeV/$$c$$2, where the first and second uncertainties are statistical and systematic, respectively.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Contributing Organization:
- LHCb Collaboration
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1525233
- Journal Information:
- Physical Review Letters, Vol. 119, Issue 6; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Observation of the Λb0→χc1$$ {\Lambda}_{\mathrm{b}}^0\to {\upchi}_{\mathrm{c}1} $$ (3872) pK− decay
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journal | September 2019 |
Weak decays of heavy baryons in the light-front approach
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journal | August 2018 |
Weak decays of doubly heavy charm $$\Omega _{cc}^{+}$$ Ω cc + baryon
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Search for pair production of Higgsinos in final states with at least three b -tagged jets in s =13 TeV pp collisions using the ATLAS detector
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text | January 2018 |
Weak Decays of Heavy Baryons in Light-Front Approach | text | January 2018 |
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