In this work we study the strong decays of $ϕ(2170)$ to final states involving the kaonic resonances $K(1460)$, $K_1(1270)$ and $K_1(1400)$, on which experimental data have recently been extracted by the BESIII Collaboration. The formalism developed here is based on interpreting $ϕ(2170)$ and $K(1460)$ as states arising from three-hadron dynamics, which is inspired by our earlier works. For $K_1(1270)$ and $K_1(1400)$ we investigate different descriptions, such as a mixture of states belonging to the nonet of axial resonances, or the former one as a state originating from the vector-pseudoscalar dynamics. The ratios among the partial widths of $K^+(1460)K^-$, $K^+_1(1400)K^-$ and $K^+_1(1270)K^-$ obtained are compatible with the experimental results, reinforcing the three-body nature of $ϕ(2170)$. Within our formalism, we can also explain the suppressed decay of $ϕ(2170)$ to $K^*(892) \bar K^*(892)$, as found by the BESIII Collaboration. Furthermore, our results can be useful in clarifying the properties of $K(1460)$, $K_1(1270)$ and $K_1(1400)$ when higher statistics data would be available.
The anti-kaon nucleon scattering lengths resulting from a Hamiltonian effective field theory analysis of experimental data and lattice QCD studies are presented. The same Hamiltonian is then used to compute the scattering length for the $K^- d$ system, taking careful account of the effects of recoil on the energy at which the $\bar{K}N$ T-matrices are evaluated. These results are then used to estimate the shift and width of the $1S$ levels of anti-kaonic hydrogen and deuterium. The $K^- p$ result is in excellent agreement with the SIDDHARTA measurement. In the $K^- d$ case the imaginary part o…
In this talk we show our recent results on the decay widths of $ϕ(2170)$ to final states formed by an anti-Kaon and a Kaonic resonance, in particular, $K(1460)$, $K_1(1270)$ and $K_1(1400)$, considering a molecular description for $ϕ(2170)$. Branching fraction ratios are obtained and compared with the recent results found by the BESIII collaboration, finding compatible results.
We study hyperon resonances by solving coupled channel scattering equations. The coupled systems include pseudoscalar- and vector-baryon channels. The parameters of the model are restricted by making a $χ^2$-fit to the cross section data on processes: $K^- p \to K^- p$, $K^- p \to \bar K^0 n$, $K^- p \to ηΛ$, $K^- p \to π^0 Λ$, $K^- p \to π^0 Σ^0$, $K^- p \to π^\pm Σ^\mp$. Data on the energy level shift and width of the $1s$ state of the kaonic hydrogen, as well as some cross-section ratios near the threshold are also considered in the fit. Two types of fits are found as a result. In both case…
This study appertains to the extraction of estimates for the masses and for the partial decay widths to pion-nucleon final states of the well-established (four-star) $s$ and $p$ baryon resonances below $2$ GeV. These estimates are exclusively obtained from the data contained in the recent compilation by the Particle Data Group. Only the $N$ ($S=0,I=1/2$) and the $Δ$ ($S=0,I=3/2$) states are considered, where $S$ and $I$ denote strangeness and total isospin, respectively.
Comment on "Mass and Width of the Lowest Resonance in QCD"
I. Caprini's，G. Colangelo's和H. Leutwyler（CCL）的文章“QCD中最低共振的质量和宽度”，物理评论Lett。96，132001（2006）[hep-ph/0512364]进行了批判性综述。本文的评论致力于补充最近的实验讨论（D. V. Bugg，J.Phys.G34，151（2007）[hep-ph/0608081]）中的CCL分析中的短周期，通过提出理论论据，指出CCL使用的理论形式主义中的严重缺陷，以及他们在σ介子质量和宽度方面的微小误差条的不相似性。在评论中所作的批评适用于类似的分析卡帕介子质量进行的文章“K 0 *（800）标量共振从罗伊-施泰纳表示的π K散射”发表为S。Descotes-Genon和B. Moussallam，Eur. J. C 48，553（2006）[hep-ph/0607133]。
Theoretical analysis of direct $CP$ violation and differential decay width in $D^\pm\to π^\pm π^+π^-$ in phase space around the resonances $ρ^0(770)$ and $f_0(500)$
In this work, we study the effect of (anti)kaon condensation on the properties of compact stars that develop hypernuclear cores with and without an admixture of $Δ$-resonances. We work within the covariant density functional theory with the parameters adjusted to $K$-atomic and kaon-nucleon scattering data in the kaonic sector. The density-dependent parameters in the hyperonic sector are adjusted to the data on $Λ$ and $Ξ^-$ hypernuclei data. The $Δ$-resonance couplings are tuned to the data obtained from their scattering off nuclei and heavy-ion collision experiments. We find that (anti)kaon …
Determination of hadronic partial widths for scalar-isoscalar resonances f0(980), f0(1300), f0(1500), f_0(1750) and the broad state f0(1530^{+90}_{-250})
在V. V. Anisovich等人的文章中，Yad.菲兹63，1489（2000）中，在450 - 1900 MeV质量区得到了波IJ^{PC}=00^{++}的K矩阵解，其中四个共振态f0（980），f0（1300），f0（1500），f0（1750）和宽态f0（1530^{+90}-250}）。基于这些解，我们确定了衰变到通道pi-pi，K-anti K，eta-eta，eta-eta '，pi-pi-pi-pi中的标量-等密度态的部分宽度以及相应的衰变耦合。
