Nuclear, Particle, Astroparticle and Cosmology (NUPAC) Seminars
Bottom Baryon Resonances with CDF Detector
Presented by Igor Gorelov (UNM)
In October 2006 CDF Collaboration has announced the discovery of bottom baryon resonances interpreted as Sigma_b states. The latest developments in the field of bottom baryon spectroscopy are discussed in this talk. The talk is based on two data analyses recently published by CDF Collaboration as two Phys. Rev. D papers. Using data of 6.0/fb integrated luminosity from proton-antiproton collisions at Ecms=1.96 TeV recorded by the CDF II detector at the Fermilab Tevatron, we present improved measurements of the masses and first measurements of natural widths of the four bottom baryon resonance states Sigma_b+, Sigma_b*+ and Sigma_b-, Sigma_b*-. Based on a final CDF data of 9.6/fb we report the observation of the excited bottom baryon resonance Lambda_b*. The data samples for both analyses are collected by an online event selection based on charged-particle tracks displaced from the proton-antiproton interaction point. The introduction on bottom baryon phenomenology, the experimental status of bottom baryons are discussed. The experimental procedure and the experimental results are presented and discussed w.r.t. to theoretical predictions.
2:00 pm, Tuesday, October 1, 2013
PAIS-2540, PAIS
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