Measurement of the masses and widths of the ?c (2455)+ and ?c (2520)+ baryons
Journal
Physical Review D
Journal Volume
104
Journal Issue
5
Date Issued
2021
Author(s)
Abstract
Using 980 fb-1 of data collected with the Belle detector operating at the KEKB asymmetric-energy e+e- collider, we report the measurements of the masses, and the first measurements of the instrinsic widths, of the ?c(2455)+ and ?c(2520)+ charmed baryons. We find M(?c(2455)+)-M(Λc+)=166.17±0.05-0.07+0.16 MeV/c2, Γ(?c(2455)+)=2.3±0.3±0.3 MeV/c2, M(?c(2520)+)-M(Λc+)=230.9±0.5-0.1+0.5 MeV/c2, and Γ(?c(2520)+)=17.2-2.1-0.7+2.3+3.1 MeV/c2, where the uncertainties are statistical and systematic, respectively. These measurements can be used to test models of the underlying quark structure of the ?c states. ? 2021 authors. Published by the American Physical Society.
Type
journal article