We report an observation of new bottom baryons produced in p (p) over bar collisions at the Tevatron. Using 1.1 fb(-1) of data collected by the CDF II detector, we observe four Lambda(0)(b)pi(+/-) resonances in the fully reconstructed decay mode Lambda(0)(b)->Lambda(+)(c)pi(-), where Lambda(+)(c)-> pK(-)pi(+). We interpret these states as the Sigma((*)+/-)(b) baryons and measure the following masses: m(Sigma b)(+)=(5807.8(-2.2)(+2.0)(stat.)+/- 1.7(syst.)) MeV/c(2), m(Sigma b)(-)=(5815.2 +/- 1.0(stat.)+/- 1.7(syst.)) MeV/c(2), and m(Sigma(*)(b))-m(Sigma(b))=(21.2(-1.9)(+2.0)(stat.)(-0.3)(+0.4)(syst.)) MeV/c(2).

T., A., A., A., J., A., T., A., T., A., M. G., A., et al. (2007). Observation of the heavy baryons Sigma(b) and Sigma(b)*. PHYSICAL REVIEW LETTERS, 99(20), 202001-1-202001-7 [10.1103/PhysRevLett.99.202001].

Observation of the heavy baryons Sigma(b) and Sigma(b)*

CIOCCI, MARIA AGNESE;
2007-01-01

Abstract

We report an observation of new bottom baryons produced in p (p) over bar collisions at the Tevatron. Using 1.1 fb(-1) of data collected by the CDF II detector, we observe four Lambda(0)(b)pi(+/-) resonances in the fully reconstructed decay mode Lambda(0)(b)->Lambda(+)(c)pi(-), where Lambda(+)(c)-> pK(-)pi(+). We interpret these states as the Sigma((*)+/-)(b) baryons and measure the following masses: m(Sigma b)(+)=(5807.8(-2.2)(+2.0)(stat.)+/- 1.7(syst.)) MeV/c(2), m(Sigma b)(-)=(5815.2 +/- 1.0(stat.)+/- 1.7(syst.)) MeV/c(2), and m(Sigma(*)(b))-m(Sigma(b))=(21.2(-1.9)(+2.0)(stat.)(-0.3)(+0.4)(syst.)) MeV/c(2).
2007
T., A., A., A., J., A., T., A., T., A., M. G., A., et al. (2007). Observation of the heavy baryons Sigma(b) and Sigma(b)*. PHYSICAL REVIEW LETTERS, 99(20), 202001-1-202001-7 [10.1103/PhysRevLett.99.202001].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/36974
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