Using data from proton-antiproton collisions at root s = 1.96 TeV recorded by the CDF II detector at the Fermilab Tevatron, evidence for the excited resonance state Lambda(b)*(0) pi(-) pi(+) is presented in its Lambda(0)(b) pi(-) pi(+) decay followed by the Lambda(0)(b) -> Lambda(+)(c) pi(-) and Lambda(+)(c) -> pK(-) pi(-) decays. The analysis is based on a data sample corresponding to an integrated luminosity of 9.6 fb(-1) collected by an online event selection based on charged-particle tracks displaced from the proton-antiproton interaction point. The significance of the observed signal is 3.5 sigma. The mass of the observed state is found to be 5919.22 +/- 0.76 MeV/c(2) in agreement with similar findings in proton-proton collision experiments.

T. Aaltonen, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, et al. (2013). Evidence for a bottom baryon resonance Λ_{b}^{*0} in CDF data. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 88, 071101-1-071101-8 [10.1103/PhysRevD.88.071101].

Evidence for a bottom baryon resonance Λ_{b}^{*0} in CDF data

BRIGLIADORI, LUCA;CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MAZZANTI, PAOLO;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2013

Abstract

Using data from proton-antiproton collisions at root s = 1.96 TeV recorded by the CDF II detector at the Fermilab Tevatron, evidence for the excited resonance state Lambda(b)*(0) pi(-) pi(+) is presented in its Lambda(0)(b) pi(-) pi(+) decay followed by the Lambda(0)(b) -> Lambda(+)(c) pi(-) and Lambda(+)(c) -> pK(-) pi(-) decays. The analysis is based on a data sample corresponding to an integrated luminosity of 9.6 fb(-1) collected by an online event selection based on charged-particle tracks displaced from the proton-antiproton interaction point. The significance of the observed signal is 3.5 sigma. The mass of the observed state is found to be 5919.22 +/- 0.76 MeV/c(2) in agreement with similar findings in proton-proton collision experiments.
2013
T. Aaltonen, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, et al. (2013). Evidence for a bottom baryon resonance Λ_{b}^{*0} in CDF data. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 88, 071101-1-071101-8 [10.1103/PhysRevD.88.071101].
T. Aaltonen;S. Amerio;D. Amidei;A. Anastassov;A. Annovi;J. Antos;G. Apollinari;J. A. Appel;T. Arisawa;A. Artikov;J. Asaadi;W. Ashmanskas;B. Auerbach;A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/229732
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