D and D _s in mass loaded flux tube

Abstract

Heavy-light hadrons are studied in a mass loaded flux tube model. The study indicates that the dynamics of mesons and baryons containing a c quark is well described by the mass loaded flux tube. The hypothesis of good diquark-antiquark degeneracy is found reasonable in heavy-light quark systems. The spectrum of charmed (D) and charmed strange (Ds) mesons is systematically computed. D and Ds in 1D multiplets are predicted to have lower masses in comparison with other theoretical predictions. The predicted masses of the 1 − (1 3 D1) and the 3 − (1 3 D3) Ds agree well with those of recently observed Ds1(2700) ± and DsJ (2860), respectively.

J P assignments of Λ + c baryons

“…However, as pointed out in Ref. [7], the spin-orbit interaction may contribute largely to the spectra of D and D s mesons. Therefore, the spin-orbit interactions ought to be taken into account.…”

“…To understand the Λ + c baryons, it is important to pin down the J P quantum numbers of theses baryons. In this paper, the spectra of Λ + c baryons are studied and the J P of these Λ + c are given within a mass loaded flux tube model [5][6][7] .…”

Dynamical mixing between 23S1 and 13Yu1, Zhao2, Zhang3 2020Phys. Rev. D4020View full textAdd to dashboardCite

“…The experimental results about their masses, decay widths and some branching fraction ratios are presented in Table I. In theory, the spectroscopy of heavy-light mesons has been systematically studied in the relativized quark model [12][13][14], heavy quark symmetry theory [15,16], relativistic quark model [17,18], chiral quark model [19,20], lattice QCD [21,22], coupled channels models [23,24] and some other models [25][26][27][28][29][30][31][32]. More references can be found in reviews [33][34][35][36] and therein.…”

Study of excited D s mesons

“…A D s meson is a heavy-light system, both the heavy quark symmetry and the light quark chiral symmetry exhibit their features in this system. So far, D s mesons have been systematically studied in the relativized quark model [1][2][3], the heavy quark symmetry theory [4], the relativistic quark model [5], the lattice QCD theory [6], the chiral quark model [7], the constituent quark model (with heavy quark symmetry and chiral symmetry) [8][9][10], the relativistic chiral quark model [11,12], the mass loaded flux tube model [13][14][15], the coupled channels model [16][17][18][19], and some other models [20,21]. However, the predicted masses of the higher orbitally excited states seem to be overestimated in most models.…”

“…In the fitting process in Ref. [14], four P -wave D mesons and two P -wave D s mesons (D s1 (2536) ± and D s2 (2573) ± ) were used inputs. However, some P -wave mesons of them are mixed states, the approximation used there has to be improved.…”