We report the observation and measurement of the mass of the bottom, strange baryon Ξb- through the decay chain Ξb-→J/ψΞ-, where J/ψ→μ+μ-, Ξ-→Λπ-, and Λ→pπ-. A signal is observed whose probability of arising from a background fluctuation is 6.6×10-15, or 7.7 Gaussian standard deviations. The Ξb- mass is measured to be 5792.9±2.5(stat) ±1.7(syst)MeV/c2. © 2007 The American Physical Society.

Observation and mass measurement of the baryon Ξb- / Aaltonen T., Abulencia A., Adelman J., Affolder T., Akimoto T., Albrow M.G., Amerio S., Amidei D., Anastassov A., Anikeev K., Annovi A., Antos J., Aoki M., Apollinari G., Arisawa T., Artikov A., Ashmanskas W., Attal A., Aurisano A., Azfar F., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - ELETTRONICO. - 99:(2007), pp. 0-0. [10.1103/PhysRevLett.99.052002]

Observation and mass measurement of the baryon Ξb-

Latino G.;
2007

Abstract

We report the observation and measurement of the mass of the bottom, strange baryon Ξb- through the decay chain Ξb-→J/ψΞ-, where J/ψ→μ+μ-, Ξ-→Λπ-, and Λ→pπ-. A signal is observed whose probability of arising from a background fluctuation is 6.6×10-15, or 7.7 Gaussian standard deviations. The Ξb- mass is measured to be 5792.9±2.5(stat) ±1.7(syst)MeV/c2. © 2007 The American Physical Society.
2007
99
0
0
Aaltonen T.; Abulencia A.; Adelman J.; Affolder T.; Akimoto T.; Albrow M.G.; Amerio S.; Amidei D.; Anastassov A.; Anikeev K.; Annovi A.; Antos J.; Aok...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1196116
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