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Observation and mass measurement of the baryon Xi(-)(b)

Aaltonen, T; Abulencia, A; Adelman, J; Affolder, T; Akimoto, T; Albrow, MG; Amerio, S; ... Zucchelli, S; + view all (2007) Observation and mass measurement of the baryon Xi(-)(b). PHYS REV LETT , 99 (5) , Article 052002. 10.1103/PhysRevLett.99.052002. Green open access

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Abstract

We report the observation and measurement of the mass of the bottom, strange baryon Xi(-)(b) through the decay chain Xi(-)(b)-->J/psi Xi(-), where J/psi-->mu(+)mu(-), Xi(-)-->Lambda pi(-), and Lambda-->p pi(-). A signal is observed whose probability of arising from a background fluctuation is 6.6 x 10(-15), or 7.7 Gaussian standard deviations. The Xi(-)(b) mass is measured to be 5792.9 +/- 2.5(stat) +/- 1.7(syst) MeV/c(2).

Type: Article
Title: Observation and mass measurement of the baryon Xi(-)(b)
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.99.052002
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.99.052002
Language: English
Additional information: © 2007 The American Physical Society
Keywords: HADRONIC COLLISIONS, QUARK PRODUCTION, CROSS-SECTION, HEAVY
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/143022
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