Measurements of the properties ofΛc(2595),Λc(2625),

Abstract

We report measurements of the resonance properties of Λc(2595) + and Λc(2625) + baryons in their decays to Λ + c π + π − as well as Σc(2455) ++,0 and Σc(2520) ++,0 baryons in their decays to Λ + c π ± final states. These measurements are performed using data corresponding to 5.2 fb −1 of integrated luminosity from pp collisions at √ s = 1.96 TeV, collected with the CDF II detector at the Fermilab Tevatron. Exploiting the largest available charmed baryon sample, we measure masses and decay widths with uncertainties comparable to the world averages for Σc states, and significantly smaller uncertainties than the world averages for excited Λ + c states.

Analysis of Λc(2595) , Λc(2625)Kawakami1, Harada2 2018Phys. Rev. D272300View full textAdd to dashboardCite

“…The properties of these states have been studied experimentally and theoretically (see, e.g., Refs. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] and references therein). In the present analysis, we compare our predictions of the decay widths with other available predictions by quark models [12,13] and chiral effective models [14,15].…”

Low-lying charmed and charmed-strange baryon states

“…(A.12) in Appendix A], the value of γ is fixed as 1.296. 2 As shown in Tables 8 and 9 [9][10][11][12] in which the light quark cluster scenario was also employed. In addition, the mass spectra obtained by different types of the quark potential models in the three-body picture also support these assignments [7,8,[56][57][58].…”

Production cross sections of hyperons and charmed baryons from e+e− annihilation near sNiiyama1, Sumihama2, Nakano3 et al. 2018Phys. Rev. DSelf Cite270140View full textAdd to dashboardCite

“…Þ is obtained to be 0.346 AE 0.012ðsystÞ using Cho's function [18] with the parameter obtained by CDF [19]. In this calculation, we integrate the mass spectrum of Λ c ð2595Þ þ in the range of 0.28 GeV=c 2 < ΔMðππÞ < 0.33 GeV=c 2 and estimate the uncertainty by changing the mass range with AE5 MeV, which is conservatively larger than the mass resolution.…”

“…is obtained to be 0.346 AE 0.012ðsystÞ using Cho's function [18] with the parameter obtained by CDF [19]. More details are described in Appendix B.…”

“…The mass of Λ c ð2595Þ þ is very close to the mass threshold of Λ þ c π þ π − , and so the line shape is asymmetric. We use the theoretical model of Cho [18] to describe the line shape of Λ c ð2595Þ þ , with parameters obtained by CDF [19]. This model describes the width of the Λ c ð2595Þ þ as a function of the mass and produces a long tail in the high-mass region.…”