Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Direct Observation of the Strange b Baryon Xi(b)-.
AU - Borissov, Guennadi
AU - Bertram, I. A.
AU - Fox, H.
AU - Ratoff, Peter N.
N1 - Borissov developed and implemented a special version of his offline tracking algorithm in the search for Xi_b which considerably increased the efficiency of the signal selection and was crucial for its observation. This is the first observation of a baryon containing quarks from all three families. RAE_import_type : Journal article RAE_uoa_type : Physics
PY - 2007/8/3
Y1 - 2007/8/3
N2 - We report the first direct observation of the strange b baryon (). We reconstruct the decay J/-, with J/µ+µ-, and --p-- in p collisions at =1.96 TeV. Using 1.3 fb-1 of data collected by the D0 detector, we observe 15.2±4.4(stat)(syst) candidates at a mass of 5.774±0.011(stat)±0.015(syst) GeV. The significance of the observed signal is 5.5, equivalent to a probability of 3.3×10-8 of it arising from a background fluctuation. Normalizing to the decay bJ/, we measure the relative rate =0.28±0.09(stat)(syst).
AB - We report the first direct observation of the strange b baryon (). We reconstruct the decay J/-, with J/µ+µ-, and --p-- in p collisions at =1.96 TeV. Using 1.3 fb-1 of data collected by the D0 detector, we observe 15.2±4.4(stat)(syst) candidates at a mass of 5.774±0.011(stat)±0.015(syst) GeV. The significance of the observed signal is 5.5, equivalent to a probability of 3.3×10-8 of it arising from a background fluctuation. Normalizing to the decay bJ/, we measure the relative rate =0.28±0.09(stat)(syst).
U2 - 10.1103/PhysRevLett.99.052001
DO - 10.1103/PhysRevLett.99.052001
M3 - Journal article
VL - 99
SP - 05200
JO - Physical review letters
JF - Physical review letters
SN - 1079-7114
IS - 5
ER -