Possible2Sand1Dcharmed and charmed-strange mesons

Abstract

Possible 2S and 1D excited D and D s states are studied, the charmed states Dð2550Þ 0 , D Ã ð2600Þ, Dð2750Þ 0 , and D Ã ð2760Þ newly observed by the BABAR Collaboration are analyzed. The masses of these states are explored within the Regge trajectory phenomenology, and the strong decay widths are computed within the heavy-quark effective theory. Both the mass and the decay width indicate that Dð2550Þ 0 is a good candidate for 2 1 S 0 . The strong decay property of D Ã ð2600Þ and D Ã s1 ð2700Þ AE is described well by pure 2 3 S 1 states. If a mixing between 2 3 S 1 and 1 3 D 1 does exist, the mixing angle is not large and 2 3 S 1 is predominant. D Ã ð2760Þ and D Ã sJ ð2860Þ AE are possibly the 1 3 D 3 D, and D s , respectively. Dð2750Þ 0 and D Ã ð2760Þ seem two different states, and Dð2750Þ 0 is very possibly the 1Dð2 À ; 5 2 Þ though the possibility of 1Dð2 À ; 3 2 Þ has not been excluded. There may exist an unobserved meson D sJ ð2850Þ AE corresponding to D Ã sJ ð2860Þ AE .

Higher radial and orbital excitations in the charmed meson family

“…[51], it was suggested that D * (2760) is a mixture of the 2 3 S 1 and 1 3 D 1 states, which is also supported by the study presented in Ref. [49]. However, calculation by the constituent quark model shows that the D (1 3 D 3 ) assignment of D * (2760) cannot be excluded [52], which is also supported by the works in Refs.…”

“…In addition, the theoretical studies presented in Refs. [49,50] also show that D(2550) can be D(2 1 S 0 ), the first radial excitation of D mesons. However, the authors in Ref.…”

Understanding the charmed states recently observed by the LHCb andBaBarCollaborations in the quark model

“…According to the PDG [4], the low-mass charmed mesons D(1 1 for these observed charmed states have been studied in the context of various models such as the chiral quark model [5][6][7], the heavy meson effective theory [8][9][10], and the 3 P 0 model with the simple harmonic oscillator wave functions [11][12][13][14][15] or the nonrelativistic quark model wave functions [16], and other approaches [17][18][19]. It is also natural and necessary to exhaust the possible qq descriptions before restoring to more exotic assignments.…”

Hadronic production of D(2550) , D*(2600)Zhao1, Tian2, Zhang3 2016Phys. Rev. DSelf Cite5020View full textAdd to dashboardCite

“…As suggested in Ref. [20], a natural parity D sJ (2850) close to D * sJ (2860) may exist. However, no charmed strange resonance located around 2860 MeV with natural parity has been observed.…”

“…D (2750) is possibly a 1 1 D 2 or a 1 3 D 2 state, it is also possibly an admixture of them [15,16,[18][19][20]. In any assignment, D(2750) can be observed in D(2750)π channel from hadronic decays of the four excited 2D states.…”