Study of 1D stranged-charm meson family using HQET

Abstract

Recently LHCb predicted spin 1 and spin 3 states D* s1(2860) and D* s3(2860) which are studied through their strong decays, and are assigned to fit the 13D1and 13D3 states in the charm spectroscopy. In this paper,using the heavy quark effective theory, we state that assigning D*s1(2860) as the mixing of 13D1 - 23S1 states, is rather a better justification to its observed experimental values than a pure state. We study its decay modes variation with hadronic coupling constant gxh and the mixing angle . We appoint spin 3 state D* s3(2860) as the missing 1D 3- JP state, and also study its decay channel behavior with coupling constant gyh. To appreciate the above results, we check the variation of decay modes for their spin partners states i.e. 1D2 and 1D'2 with their masses and strong coupling constant i.e. gxh and gyh. Our calculation using HQET approach give mixing angle between the 13D1 - 23S1 state for D* s1(2860) to lie in the range (-1.6 radians < theta < -1.2 radians). Our calculation for coupling constant values gives gxh to lie between value 0:17 < gxh < 0:20 and gyh to be 0.40. We expect from experiments to observe this mixing angle to verify our results.

11 pages, 9 figure and 5 Tables, EPJC 2015 communicated

References in corpus (12)

• Big-Bang Nucleosynthesis
• $D_{sJ}(2860)$ and $D_{sJ}(2715)$
• Strong decays of heavy-light mesons in a chiral quark model
• The newly observed open-charm states in quark model
• Canonical Interpretation of the D_{sJ}(2860) and D_{sJ}(2690)
• $D_{sJ}(2860)$ resonance and the $s_{\ell }^P={\frac{5}{2}}^{-}$ $c\bar{s}$ ($c\bar{q}$) doublet
• Understanding masses of $c\bar{s}$ states in Regge phenomenology
• Combined study of $2S$ and $1D$ open-charm mesons with natural spin-parity
• $D_{s3}^{\ast }(2860)$ and $D_{s1}^{\ast }(2860)$ as the 1D $c\bar{s}$ states
• A multiquark description of the $D_{sJ}(2860)$ and $D_{sJ}(2700)$
• Strong Decay widths and Coupling Constant of Recent Charm Meson States
• $D_{s1}^{\star }(2700{)}^{\pm }$ and $D_{sJ}^{\star }(2860{)}^{\pm }$ revisited within the ${}^3{P}_0$ model