A Study of Excited Charm-Strange Baryons WithEvidence for New Baryons Xi_c(3055)+ and Xi_c(3123)
Author | : |
Publisher | : |
Total Pages | : |
Release | : 2007 |
ISBN-10 | : OCLC:1061396816 |
ISBN-13 | : |
Rating | : 4/5 ( Downloads) |
Download or read book A Study of Excited Charm-Strange Baryons WithEvidence for New Baryons Xi_c(3055)+ and Xi_c(3123) written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a study of excited charm-strange baryon states produced in ee− annihilations at or near a center-of-mass energy of 10.58 GeV, in a data sample with an integrated luminosity of 384 fb−1 recorded with the BABAR detector at the PEP-II e+e storage rings at the Stanford Linear Accelerator Center. We study strong decays of charm-strange baryons to?{sub c}+K{sub S}°,?{sub c}+K−,?{sub c}+K−?+,?{sub c}+K{sub S}°?−,?{sub c}+K{sub S}°?−?+,?{sub c}+K−?−?+. This study confirms the existence of the states?{sub c}(2980)+,?{sub c}(3077)+, and?{sub c}(3077)−, with a more accurate determination of the?{sub c}(2980)+ mass and width. We also present evidence for two new states,?{sub c}(3055)+ and?{sub c}(3123)+, decaying through the intermediate resonant modes?{sub c}(2455){sup ++}K− and?{sub c}(2520){sup ++}K−, respectively. For each of these baryons, we measure the yield in each final state, determine the statistical significance, and calculate the product of the production cross-section and branching fractions. We also measure the masses and widths of these excited charm-strange baryons.