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

CDF Collaboration, T. Aaltonen, A. Abulencia, J. Adelman, T. Affolder, T. Akimoto, et al. (2007). First Observation of Heavy Baryons Sigma_b and Sigma*_b. PHYSICAL REVIEW LETTERS, 99(20), 1-7 [10.1103/PhysRevLett.99.202001].

First Observation of Heavy Baryons Sigma_b and Sigma*_b

BRIGLIADORI, LUCA;CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO
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
CDF Collaboration, T. Aaltonen, A. Abulencia, J. Adelman, T. Affolder, T. Akimoto, et al. (2007). First Observation of Heavy Baryons Sigma_b and Sigma*_b. PHYSICAL REVIEW LETTERS, 99(20), 1-7 [10.1103/PhysRevLett.99.202001].
CDF Collaboration; T. Aaltonen; A. Abulencia; J. Adelman; T. Affolder; T. Akimoto; M. G. Albrow; S. Amerio; D. Amidei; A. Anastassov; K. Anikeev; A. A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/53682
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