arXiv subjects

Dan-Dan Ye

Publications and source records attributed to Dan-Dan Ye.

6 recordsLinked to original sources

arXiv2017

Study of $P$-wave excitations of observed charmed strange baryons

Many excited charmed strange baryons such as $Ξ_c(2790)$, $Ξ_c(2815)$, $Ξ_c(2930)$, $Ξ_c(2980)$, $Ξ_c(3055)$, $Ξ_c(3080)$ and $Ξ_c(3123)$ have been observed. In order to understand their internal structure and to determine their spin-parities, the strong decay properties of these baryons as possible $P$-wave excited $Ξ_c$ candidates have been systematically studied in a $^3P_0$ model. The configurations and $J^P$ assignments of $Ξ_c(2790)$, $Ξ_c(2815)$, $Ξ_c(2930)$, $Ξ_c(2980)$, $Ξ_c(3055)$, $Ξ_c(3080)$ and $Ξ_c(3123)$ have been explored based on recent experimental data. In our analyses, $Ξ_c(3055)$, $Ξ_c(3080)$ and $Ξ_c(3123)$ seem impossible to be the $P$-wave excited $Ξ_c$. $Ξ_c(2790)$, $Ξ_c(2815)$, $Ξ_c(2930)$ and $Ξ_c(2980)$ may be the $P$-wave excited $Ξ_c$. In particular, $Ξ_c(2790)$ and $Ξ_c(2815)$ are very possibly the $P$-wave excited $Ξ_{c1}(1/2^-)$ and $Ξ_{c1}(3/2^-)$, respectively. $Ξ_c(2980)$ may be the $P$-wave excited $Ξ_{c1}^{'}(\frac{1}{2}^-)$. $Ξ_c(2930)$ may be the $P$-wave $Ξ_{c0}^{'}(\frac{1}{2}^-)$, $\tildeΞ_{c0}(\frac{1}{2}^-)$, $Ξ_{c2}^{'}(\frac{3}{2}^-)$, $Ξ_{c2}^{'}(\frac{5}{2}^-)$, $\tildeΞ_{c2}(\frac{3}{2}^-)$ or $\tildeΞ_{c2}(\frac{5}{2}^-)$. Furthermore, some branching fraction ratios related to the internal structure and quark configuration of $P$-wave $Ξ_c$ have also been computed. Measurements of these ratios in the future will be helpful to understand these excited $Ξ_c$.

hep-ph↗

arXiv2017

Study of $2S$- and $1D$- excitations of observed charmed strange baryons

Strong decays of $Ξ_c$ baryons with radial or orbital excitations with positive parity have been studied in a $^3P_0$ model. As candidates of these $Xi_c$, possible configurations and $J^P$ of $Ξ_c(2930)$, $Ξ_c(2980)$, $Ξ_c(3055)$, $Ξ_c(3080)$ and $Ξ_c(3123)$ have been assigned. There are $40$ kinds of configurations to describe these excited $Ξ_c$. In these assignments, $Ξ_c(2930)$ may be a $2S$-wave excited $\tildeΞ_{c1}(\frac{1}{2}^+)$ or $\tildeΞ_{c1}(\frac{3}{2}^+)$, or a $D$-wave excited $\hatΞ_{c1}^{' }(\frac{1}{2}^+)$, $\checkΞ_{c1}^{\ 0}(\frac{1}{2}^+)$, $\checkΞ_{c1}^{\ 2}(\frac{1}{2}^+)$, $\hatΞ_{c1}^{' }(\frac{3}{2}^+)$, $\checkΞ_{c1}^{\ 0}(\frac{3}{2}^+)$ or $\checkΞ_{c1}^{\ 2}(\frac{3}{2}^+)$. $Ξ_c(2980)^+$ may be a $2S$-wave excited $\tildeΞ_{c1}(\frac{1}{2}^+)$ or $\tildeΞ_{c0}^{'}(\frac{1}{2}^+)$ with $J^P={1\over 2}^+$, or a $D$-wave excited $\checkΞ_{c0}^{'0}(\frac{1}{2}^+)$ or $\checkΞ_{c1}^{\ 0}(\frac{1}{2}^+)$ with $J^P={1\over 2}^+$. $Ξ_c(3055)^+$ may be a $2S$-wave excited $\acuteΞ_{c1}^{'}(\frac{3}{2}^+)$ or $\acuteΞ_{c0}(\frac{1}{2}^+)$. It may be a $D$-wave excited $Ξ_{c1}^{' }(\frac{3}{2}^+)$, $Ξ_{c2}^{' }(\frac{5}{2}^+)$, $Ξ_{c2}^{ }(\frac{3}{2}^+)$ or $Ξ_{c2}^{ }(\frac{5}{2}^+)$. $Ξ_c(3080)^+$ is very possibly a $2S$-wave excited $\acuteΞ_{c0}(\frac{1}{2}^+)$, and seems not a $D$-wave excitation of $Ξ_c$. For the poor experimental information of $Ξ_c(3123)$, it is impossible to identify this state at present. It is found that the channel $ΛD$ vanishes in the strong decay of $P$-wave, $D$-wave and $2S$-wave excited $Ξ_c$ without $ρ$- mode excitation between the two light quarks ($n_ρ=L_ρ=0$). Some branching fraction ratios have been computed and can be employed to distinguish different configurations in forthcoming experiments.

hep-ph↗

arXiv2017

Hadronic decay properties of newly observed $Ω_c$ baryons

Hadronic decay widths of the newly observed charmed strange baryons, $Ω_c(3000)^0$, $Ω_c(3050)^0$, $Ω_c(3066)^0$, $Ω_c(3090)^0$ and $Ω_c(3119)^0$ have been calculated in a $^3P_0$ model. Our results indicate that $Ω_c(3066)^0$ and $Ω_c(3090)^0$ can be interpreted as the $1P-$wave $Ω_{c2}(\frac{3}{2}^-)$ or $Ω_{c2}(\frac{5}{2}^-)$. Though the measured masses of $Ω_c(3000)^0$, $Ω_c(3050)^0$ and $Ω_c(3119)^0$ are lower than existed theoretical predictions of $1D-$wave $Ω_c$, the hadronic decay features of these $Ω_c$ favor assignments of the $1D-$wave states. $Ω_c(3000)^0$ is possibly $Ω_{c1}(\frac{1}{2}^+)$ or $Ω_{c1}(\frac{3}{2}^+)$, $Ω_c(3050)^0$ is possibly $\hatΩ_{c3}(\frac{5}{2}^+)$ or $\hatΩ_{c3}(\frac{7}{2}^+)$, and $Ω_c(3119)^0$ is possibly $\hatΩ_{c3}(\frac{5}{2}^+)$, $\hatΩ_{c3}(\frac{7}{2}^+)$, $Ω_{c3}(\frac{5}{2}^+)$ or $Ω_{c3}(\frac{7}{2}^+)$. The predicted total decay widths in these assignments are consistent with experiment.

hep-ph↗

arXiv2016

Nature of charmed strange baryons $Ξ_c(3055)$ and $Ξ_c(3080)$

The hadronic decay widths and some ratios of branching fractions of the newly observed charmed strange baryons, $Ξ_c(3055)^0$, $Ξ_c(3055)^+$ and $Ξ_c(3080)^+$ are calculated in a $^3P_0$ model. In the calculation, they are considered as $34$ kinds of $D-wave$ charmed strange baryons. Among these assignments, $Ξ_c(3055)^+$ is very possibly a $J^P={5\over 2}^+$ $\hatΞ_{c3}^\prime(\frac{5}{2}^+)$ or $\checkΞ_{c3}^2(\frac{5}{2}^+)$, where $Ξ_c(3055)^+$ has the total decay width $Γ=10.1$ MeV and $Γ=7.6$ MeV. The predicted ratios $Γ(Ξ_c(3055)^+ \to ΛD^+ )/ Γ(Ξ_c(3055)^+ \to Σ_c^{++}K^-)=3.39$. $Ξ_c(3055)^+$ is also very possibly a $J^P={7\over 2}^+$ $\hatΞ_{c3}^\prime(\frac{7}{2}^+)$ or $\checkΞ_{c3}^2(\frac{7}{2}^+)$. In these two assignments, $Ξ_c(3055)^+$ has the total decay width $Γ=9.7$ MeV and $Γ=6.3$ MeV. The predicted ratios $Γ(Ξ_c(3055)^+ \to ΛD^+ )/ Γ(Ξ_c(3055)^+ \to Σ_c^{++}K^-)=5.91~\rm{or}~6.04$. As a isospin partner of $Ξ_c(3055)^+$, $Ξ_c(3055)^0$ is also very possibly a $J^P={5\over 2}^+$ $\hatΞ_{c3}^\prime(\frac{5}{2}^+)$ or $\checkΞ_{c3}^2(\frac{5}{2}^+)$, where $Ξ_c(3055)^0$ has the total decay width $Γ=10.9$ MeV and $Γ=7.0$ MeV. The predicted ratios $Γ(Ξ_c(3055)^0 \to ΛD^0 )/ Γ(Ξ_c(3055)^0 \to Σ_c^{+}K^-)=4.24~\rm{or}~4.20$. $Ξ_c(3055)^0$ is also very possibly a $J^P={7\over 2}^+$ $\hatΞ_{c3}^\prime(\frac{7}{2}^+)$ or $\checkΞ_{c3}^2(\frac{7}{2}^+)$. In these assignments, $Ξ_c(3055)^0$ has the total decay width $Γ=10.3$ MeV and $Γ=7.1$ MeV. The predicted ratios $Γ(Ξ_c(3055)^0 \to ΛD^0 )/ Γ(Ξ_c(3055)^0 \to Σ_c^{+}K^-)=7.47~\rm{or}~7.56$. The results agree well with recent experimental data from Belle. $Ξ_c(3080)^+$ seems impossible to be identified with a D-wave charmed strange baryon.

hep-ph↗

arXiv2015

Hadronic decays of the highly excited $2D$ $D_s$ resonances

Hadronic decays of the highly excited $2D$ $D_s$ resonances have been studied in the $^3P_0$ model. Widths of all possible hadronic decay channels of the $2D$ $D_s$ have been computed. $D^*_{s1}(2700)$, $D^*_{s1}(2860)$, $D^*_{s3}(2860)$, $D(2600)$ and $D(2750)$ can be produced from hadronic decays of the $2D$ $D_s$, and relevant hadronic decay widths have been particularly paid attention to. The hadronic decay widths of $2D$ $D_s$ to $D(2600)$ or $D(2750)$ may be large, and the numerical results are different in different assignments of $D(2600)$ and $D(2750)$. The hadronic decay widths of $2D$ $D_s$ to $D^*_{s1}(2860)$, $D^*_{s3}(2860)$ or $D^*_{s1}(2700)$ are very small, and different in different assignments of $D^*_{s1}(2700)$.

hep-ph↗

arXiv2014

Is $Y(4008)$ possibly a $1^{--}$ $ψ(3^3S_1)$ state?

The strong decays of the radially excited $ψ(3^3S_1)$ state are studied within the $^3P_0$ model. As a believed $ψ(3^3S_1)$, some strong decay widths and relevant ratios of $ψ(4040)$ are calculated in the model. The theoretical results are consistent with experiments. In a similar way, as a possible $ψ(3^3S_1)$, the same strong decay widths and relevant ratios of $Y(4008)$ are presented. Our study indicates that $Y(4008)$ is hard to be identified with a $ψ(3^3S_1)$ charmonium once it is confirmed under the $D^*\bar{D}^*$ threshold, but it is very possibly a $ψ(3^3S_1)$ charmonium once it is confirmed above the $D^*\bar{D}^*$ threshold by experiment.

hep-ph↗