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51.
The magnetic moments ofb-quark baryons within the framework of five quark models are derived. Also the transition magnetic moments of variousb-quark baryons are calculated. 相似文献
52.
In this study, by combining the equal spacing rule with recent observations of \begin{document}$ \Omega_c(X) $\end{document} ![]()
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and \begin{document}$ \Xi_c(X) $\end{document} ![]()
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baryons, we predict the spectrum of the low-lying \begin{document}$ \lambda $\end{document} ![]()
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-mode \begin{document}$ 1P $\end{document} ![]()
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-wave excited \begin{document}$ \Sigma_c $\end{document} ![]()
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states. Furthermore, their strong decay properties are predicted using the chiral quark model and the nature of \begin{document}$ \Sigma_c(2800) $\end{document} ![]()
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is investigated by analyzing the \begin{document}$ \Lambda_c\pi $\end{document} ![]()
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invariant mass spectrum. The \begin{document}$ \Sigma_c(2800) $\end{document} ![]()
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structure observed in the \begin{document}$ \Lambda_c \pi $\end{document} ![]()
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mass spectrum was found to potentially arise from two overlapping \begin{document}$ P $\end{document} ![]()
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-wave \begin{document}$ \Sigma_c $\end{document} ![]()
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resonances, \begin{document}$ \Sigma_c(2813)3/2^- $\end{document} ![]()
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and \begin{document}$ \Sigma_c(2840)5/2^- $\end{document} ![]()
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. These resonances have similar decay widths of \begin{document}$ \Gamma\sim 40 $\end{document} ![]()
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MeV and predominantly decay into the \begin{document}$ \Lambda_c \pi $\end{document} ![]()
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channel. The \begin{document}$ \Sigma_c(2755)1/2^- $\end{document} ![]()
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state is likely to be a very narrow state with a width of \begin{document}$ \Gamma\sim 15 $\end{document} ![]()
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MeV, with its decays almost saturated by the \begin{document}$ \Lambda_c \pi $\end{document} ![]()
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channel. Additionally, evidence of the \begin{document}$\Sigma_c(2755) {1}/{2}^-$\end{document} ![]()
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resonance as a very narrow peak may be seen in the \begin{document}$ \Lambda_c\pi $\end{document} ![]()
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invariant mass spectrum. The other two \begin{document}$ P $\end{document} ![]()
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-wave states, \begin{document}$\Sigma_c(2746) {1}/{2}^-$\end{document} ![]()
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and \begin{document}$\Sigma_c(2796) {3}/{2}^-$\end{document} ![]()
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, are relatively narrow states with similar widths of \begin{document}$ \Gamma\sim 30 $\end{document} ![]()
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MeV and predominantly decay into \begin{document}$ \Sigma_c\pi $\end{document} ![]()
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and \begin{document}$ \Sigma^{*}_c\pi $\end{document} ![]()
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, respectively. This study can provide useful references for discovering these low-lying \begin{document}$ P $\end{document} ![]()
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-wave states in forthcoming experiments. 相似文献
53.
54.
55.
M. Ablikim M. N. Achasov X. C. Ai O. Albayrak M. Albecht D. J. Ambrose A. Amoroso 《中国物理C(英文版)》2016,40(11):113001-113001
By analyzing 2.93 fb-1 data collected at the center-of-mass energy √s=3.773 GeV with the BESIII detector, we measure the absolute branching fraction of the semileptonic decay D+→K0e+ve to be B(D+→K0e+ve)=(8.59±0.14±0.21)% using K0→KS0→π0π0, where the first uncertainty is statistical and the second systematic. Our result is consistent with previous measurements within uncertainties.. 相似文献
56.
Ya. Azimov V. Kuznetsov M. V. Polyakov I. Strakovsky 《The European Physical Journal A - Hadrons and Nuclei》2005,25(3):325-327
Using the results of the GRAAL Collaboration on the η photoproduction from the neutron target, we attempt to extract the partial
radiative width of the possible new nucleon resonance N
*(1675). The obtained estimates support this resonance to be a very attractive candidate for the non-strange member of the
exotic antidecuplet of baryons --a partner of the Θ+ pentaquark. Our phenomenological value for the transition magnetic moment μ(n
*
n), appears to be in good agreement with the predictions of the Chiral Quark Soliton Model. 相似文献
57.
The D*D1(2420) and DD'*(2600) interactions are studied in a one-boson-exchange model. Isovector bound state solutions with spin parity JP=1+ are found from the D*D1(2420) interaction, which may be related to the observed charged charmonium-like state Z(4430). There is no bound state solution found from the DD'*(2600) interaction. 相似文献
58.
A.?V.?Anisovich I.?Jaegle E.?Klempt B.?Krusche V.?A.?Nikonov A.?V.?Sarantsev U.?Thoma 《The European Physical Journal A - Hadrons and Nuclei》2009,41(1):13-24
A formalism is developed for the partial-wave analysis of data on meson photoproduction off deuterons and applied to photoproduction
of and mesons. Different interpretations of a dip-bump structure of the photoproduction cross-section in the 1670MeV region are presented and discussed. Helicity amplitudes for two low-mass S11 states are determined. 相似文献
59.
L. Tolos C. Garcia-Recio V. K. Magas T. Mizutani J. Nieves A. Ramos L. L. Salcedo 《中国物理 C》2009,33(12):1323-1326
We study charmed baryon resonances that are generated dynamically from a coupled-channel unitary approach that implements heavy-quark symmetry. Some states can already be identified with experimental observations, such as Ac(2595), Ac(2660), Ec(2902) or Ac(2941), while others need a compilation of more experimental data as well as an extension of the model to include higher order contributions. We also compare our model to previous SU(4) schemes. 相似文献
60.
The Babar Collaboration announced two new excited charmed baryons■_c(3055)~ and■_c(3123)~ . We study their strong decays assuming they are D-wave states.Some assignments are excluded by comparing our numerical results with the experimental values of the total widths of ■_c(3055)~ and■_c(3123)~ .We also suggest some possible decay modes,which will be helpful to determine the properties of■_c(3055)~ and■_c(3123)~ . 相似文献