Is $D^{+}_{sJ}(2632)$ the first radial excitation of $D_{s}^{*}(2112)$?

Details Is $D^{+}_{sJ}(2632)$ the first radial excitation of $D_{s}^{*}(2112)$? Is $D^{+}_{sJ}(2632)$ the first radial excitation of $D_{s}^{*}(2112)$?

2005-05-24

arxiv.org/abs/hep-ph/0505205v2

Phys.Lett.B623:218-226,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 8 figures

Scientific paper

10.1016/j.physletb.2005.07.059

We present a quantitative analysis of the $D^{+}_{sJ}(2632)$ observed by SELEX mainly focusing on the assumption that $D^{+}_{sJ}(2632)$ is the first radial excitation of the $1^{-}$ ground state $D^{*}_{s}(2112)$. By solving the instantaneous Bethe-Salpeter equation, we obtain the mass $2658\pm 15$ MeV for the first excited state, which is about 26 MeV heavier than the experimental value $2632\pm 1.7$ MeV. By means of PCAC and low-energy theorem we calculate the transition matrix elements and obtain the decay widths: $\Gamma(D^{+}_{sJ}\to D^{+}_s\eta)=4.07\pm 0.34$ MeV, $\Gamma(D^{+}_{sJ}\to D^{0}K^{+}) \simeq \Gamma(\Gamma(D^{+}_{sJ}\to D^{+}K^{0})=8.9\pm 1.2$ MeV, and the ratio $\Gamma(D^{+}_{sJ}\to D^{0}K^{+})/\Gamma(D^{+}_{sJ}\to D^{+}_{s}\eta)=2.2\pm 0.2$ as well. This ratio is quite different from the SELEX data $0.14\pm 0.06$. The summed decay width of those three channels is approximately 21.7 MeV, already larger than the observed bound for the full width ($\leq 17$ MeV). Furthermore, assuming $D_{sJ}^+(2632)$ is $1^{-}$ state, we also explore the possibility of $S-D$ wave mixing to explain the SELEX observation. Based on our analysis, we suspect that it is too early to conclude that $D^{+}_{sJ}(2632)$ is the first radial excitation of the $1^{-}$ ground state $D^{*}_{s}(2112)$. More precise measurements of the relative ratios and the total decay width are urgently required especially for $S-D$ wave mixing.

Affiliated with

Also associated with

No associations

Rating

Is $D^{+}_{sJ}(2632)$ the first radial excitation of $D_{s}^{*}(2112)$? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Is $D^{+}_{sJ}(2632)$ the first radial excitation of $D_{s}^{*}(2112)$?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Is $D^{+}_{sJ}(2632)$ the first radial excitation of $D_{s}^{*}(2112)$? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-72703