Observation of {Lambda}{sub b}{sup 0}{r_arrow}J/{psi}{Lambda} at the Fermilab proton-antiproton collider
Journal Article
·
· Physical Review, D
OSTI ID:488773
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- Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Istituto Nazionale di Fisica Nucleare, University of Bologna, I-40126 Bologna (Italy)
- Brandeis University, Waltham, Massachusetts 02254 (United States)
- University of California at Los Angeles, Los Angeles, California 90024 (United States)
- University of Chicago, Chicago, Illinois 60637 (United States)
- Duke University, Durham, North Carolina 27708 (United States)
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
- Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati (Italy)
- University of Geneva, CH-1211 Geneva 4 (Switzerland)
The decay {Lambda}{sub b}{sup 0}{r_arrow}J/{psi}{Lambda} is observed in 110 pb{sup {minus}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{plus_minus}4(stat){plus_minus}3(syst) MeV/c{sup 2}, and a mass difference between the {Lambda}{sub b}{sup 0} and the B{sup 0} of 340{plus_minus}5(stat){plus_minus}1(syst) MeV/c{sup 2}. The production cross-section times branching fraction for the decay {Lambda}{sub b}{sup 0}{r_arrow}J/{psi}{Lambda} relative to that for the decay B{sup 0}{r_arrow}J/{psi}K{sub S}{sup 0} has been measured to be 0.27{plus_minus}0.12(stat){plus_minus}0.05(syst). {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 488773
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 3 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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