Measurement of the Production Fraction Times Branching Fraction f(b -> \Lambda_b) x B(\Lambda_b -> J/\psi \Lambda)
A new measurement of the b {yields} {Lambda}{sub b} production fraction multiplied by the {Lambda}{sub b} {yields} J/{psi}{Lambda} branching fraction was performed by the D0 experiment using 6.1 fb{sup -1} of p{bar p} collisions at {radical}s = 1.96 TeV. The result of this measurement, f(b {yields} {Lambda}{sub b}) {center_dot} {Beta}({Lambda}{sub b} {yields} J/{psi}{Lambda}) = [6.01 {+-} 0.60 (stat.) {+-} 0.58 (syst.) {+-} 0.28 (PDG)] x 10{sup -5}, represents an improvement in precision by about a factor of three with respect to the current world average. We give an estimate of {Beta}({Lambda}{sub b} {yields} J/{psi}{Lambda}), which takes into account correlations among the different b-hadron production fractions and other weakly decaying baryons.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1029358
- Report Number(s):
- FERMILAB-CONF-11-497-E; arXiv eprint number arXiv:1109.6083; TRN: US1105757
- Resource Relation:
- Conference: Presented at DPF 2011, Providence, Rhode Island, USA, 9-13 Aug 2011
- Country of Publication:
- United States
- Language:
- English
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