Observation of {Lambda}{sup 0 ovr sub b} {r_arrow}J/{Psi} {Lambda} at the Fermilab proton-antiproton collider.
The decay {Lambda}{sup 0}{sub b} {yields}J/{Psi} {Lambda} is observed in 110 pb{sup -1} of p{bar p} collisions taken at {radical} s=1.8 TeV. These data are used to measure a {Lambda}{sub b}{sup 0} mass of 5621{+-}4(stat){+-}3(syst) MeV/c2, and a mass difference between the {Lambda}{sub b}{sup 0} and the B{sup 0} of 340{+-}5(stat){+-}1(syst) MeV/c2. The production cross-section times branching fraction for the decay {Lambda}{sup 0}{sub b} {yields}J/{Psi} {Lambda} relative to that for the decay B{sup 0}{yields}J/{psi} K{sub S}{sup 0} has been measured to be 0.27{+-}0.12(stat){+-}0.05(syst).
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- ER
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 938074
- Report Number(s):
- ANL/HEP/JA-26645
- Journal Information:
- Phys. Rev. D, Journal Name: Phys. Rev. D Journal Issue: 1 ; Feb. 1, 1997 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- ENGLISH
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