- Abstract:
-
We report the first direct observation of the strange b baryon Xi(b)- (Xi(b)+). We reconstruct the decay Xi(b)- -->J/psiXi-, with J/psi-->mu+mu-, and Xi--->Lambdapi--->ppi-pi- in pp collisions at square root of s =1.96 TeV. Using 1.3 fb(-1) of data collected by the D0 detector, we observe 15.2 +/- 4.4(stat)(-0.4)(+1.9)(syst) Xi(b)- candidates at a mass of 5.774 +/- 0.011(stat) +/- 0.015(syst) GeV. The significance of the observed signal is 5.5 sigma, equivalent to a probability of...
Expand abstract - Publication status:
- Published
- Publisher copy:
- 10.1103/physrevlett.99.052001
-
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- Journal:
- Physical review letters
- Volume:
- 99
- Issue:
- 5
- Pages:
- 052001
- Publication date:
- 2007-08-05
- DOI:
- EISSN:
-
1079-7114
- ISSN:
-
0031-9007
- URN:
-
uuid:47101f8a-bc2f-4ebc-8905-eabd3fe3f42e
- Source identifiers:
-
28679
- Local pid:
- pubs:28679
- Language:
- English
- Keywords:
- Copyright date:
- 2007
Journal article
Direct observation of the strange b baryon Xib-.
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