Evidence for the bottom baryon resonance state Lambda_b* with the CDF II detector

Lambda_c+ (-->proton K- pi+) pi-. The analysis is based on a data sample corresponding to an integrated luminosity of 9.6/fb collected by an online event selection based on tracks displaced from the proton-antiproton interaction point. The local significance of the observed signal is 4.6 Gaussian sigmas. while the significance of the signal for the search region is 3.5 Gaussian sigmas. The mass of the observed state is found to be 5919.5+-0.35+-1.72 MeV .
Comment: 7 pages, 2 figures, 2 tables; talk made on behalf of the CDF Collaboration at ICHEP 2012, July 4-11, 2012, Melbourne, Australia -->
Druh dokumentu: Working Paper
Přístupová URL adresa: http://arxiv.org/abs/1301.0949
Přírůstkové číslo: edsarx.1301.0949
Autor: Gorelov, Igor V.
Rok vydání: 2013
Předmět:
Zdroj: Proceedings of Science, PoS(ICHEP2012)349
Druh dokumentu: Working Paper
Popis: Using data from proton-antiproton collisions at Ecms=1.96 TeV recorded by the CDF II detector at the Fermilab Tevatron, we present evidence for the excited resonance state Lambda_b* in its fully reconstructed decay mode to Lambda_b0 pi+ pi- where Lambda_b0 -->Lambda_c+ (-->proton K- pi+) pi-. The analysis is based on a data sample corresponding to an integrated luminosity of 9.6/fb collected by an online event selection based on tracks displaced from the proton-antiproton interaction point. The local significance of the observed signal is 4.6 Gaussian sigmas. while the significance of the signal for the search region is 3.5 Gaussian sigmas. The mass of the observed state is found to be 5919.5+-0.35+-1.72 MeV .
Comment: 7 pages, 2 figures, 2 tables; talk made on behalf of the CDF Collaboration at ICHEP 2012, July 4-11, 2012, Melbourne, Australia
Databáze: arXiv
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