We report an observation of new bottom baryons produced in pp̄ collisions at the Tevatron. Using 1.1fb-1 of data collected by the CDF II detector, we observe four Λb0π± resonances in the fully reconstructed decay mode Λb0→Λc+π-, where Λc+→pK-π+. We interpret these states as the Σb(*) ± baryons and measure the following masses: mΣb+=5807.8-2.2+2. 0(stat.)±1.7(syst.)MeV/c2, mΣb-=5815.2±1.0(stat.)±1. 7(syst.)MeV/c2, and m(Σb*)-m(Σb)=21.2-1.9+2.0(stat.)-0.3+0. 4(syst.)MeV/c2. © 2007 The American Physical Society.

Observation of the heavy baryons Σb and Σb* / 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.99.202001]

Observation of the heavy baryons Σb and Σb*

Latino G.;
2007

Abstract

We report an observation of new bottom baryons produced in pp̄ collisions at the Tevatron. Using 1.1fb-1 of data collected by the CDF II detector, we observe four Λb0π± resonances in the fully reconstructed decay mode Λb0→Λc+π-, where Λc+→pK-π+. We interpret these states as the Σb(*) ± baryons and measure the following masses: mΣb+=5807.8-2.2+2. 0(stat.)±1.7(syst.)MeV/c2, mΣb-=5815.2±1.0(stat.)±1. 7(syst.)MeV/c2, and m(Σb*)-m(Σb)=21.2-1.9+2.0(stat.)-0.3+0. 4(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/2158/1196107
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