Conveners
Heavy baryon spectroscopy: Session 1
- Hugo Garcia Tecocoatzi (Istituto Nazionale di Fisica Nucleare)
Heavy baryon spectroscopy: Session 2
- Fabrizio Ferro (Istituto Nazionale di Fisica Nucleare)
Heavy baryon spectroscopy: Session 3
- Hugo Garcia Tecocoatzi (Istituto Nazionale di Fisica Nucleare)
Symmetry structures of the heavy baryon spectrum are discussed in this talk. Two important symmetries are heavy-quark spin symmetry and chiral symmetry. Due to the heavy-quark spin symmetry, the heavy hadron spectra show spin-doubling structures, while chiral symmetry may cause parity doubling structures. I will show recent studies based on chiral effective theory of diquarks and its...
We study the interaction of meson-baryon coupled channels carrying quantum numbers of $\Omega_{cc}$ , $\Omega_{bb}$ and $\Omega_{bc}$ presently under investigation by the LHCb collaboration. The interaction is obtained from an extension of the local hidden gauge approach to the heavy quark sector that has proved to provide accurate results compared to experiment in the case of $\Omega_{c}$ ,...
We study a mechanism for $\Omega_c \to \pi^+ \Omega(2012)$ production through an external emission Cabibbo favored weak decay mode, where the $\Omega(2012)$ is dynamically generated from the interaction of $\bar{K}\Xi^*(1530)$, $\eta\Omega$, with $\bar{K}\Xi$ as the main decay channel. The $\Omega(2012)$ decays latter to $\bar{K}\Xi$ in this picture, with results compatible with Belle data....
We have studied the meson-baryon interaction in the neutral $S=-2$ sector using an extended Unitarized Chiral Perturbation Theory, which takes into account not only the leading Weinberg-Tomozawa term (as all the previous studies in $S=-2$ sector), but also the Born terms and next-to-leading order contribution. Based on the SU(3) symmetry of the chiral Lagrangian we took most of the model...
The spectroscopy of charmonium-like states together with the spectroscopy of charmed and strange baryons is discussed. It is a good testing tool for the theories of strong interactions, including: QCD in both the perturbative and non-perturbative regimes, LQCD, potential models and phenomenological models [1, 2, 3]. An understanding of the baryon spectrum is one of the primary goals of...
The talk will report the most recent results by CMS on conventional heavy baryons
In this work, we study the charm and bottom lowest-lying
${\frac{1}{2}}^-$ and ${\frac{3}{2}}^-$ $\Lambda_{Q}$ resonances
using a model which considers the interplay between the nearest
baryon-meson and bare constituent quark model (CQM) degrees of
freedom. For the former ones, we only consider the scattering of
pions off $\Sigma_Q^{(*)}$ baryons. In addition, we constrain...
We present a quark model analysis of $S$- and $P$-wave baryon states with one, two and three heavy quarks ($Q=c$, $b$) in the framework of the harmonic oscillator quark model. The study of heavy baryons is based on masses, electromagnetic and strong couplings. The results are found to be in good agreement with the available experimental data.
Recently, a novel pentaquark picture ($Qqq\bar{q}q$) in addition to the conventional three-quark one ($Qqq$) for describing the Roper-like singly heavy baryons such as $\Lambda_c(2765)$ and $\Xi_c(2970)$ has been invented, based on a chiral model. In this talk, I review roles of chiral symmetry and the $U(1)_A$ axial anomaly for those two states, and present our prediction of the existence of...
Heavy baryon spectroscopy is essential for us to understand the strong interaction and the inner structure of hadrons. With the increasing luminosity and the development of the techniques, more and more results on heavy baryons are reported by LHCb. In this talk, the speaker will introduce some very recent results on the conventional charm baryons from LHCb
In this presentation, we report on two recent results on peak-like structures observed in $\Lambda_c$ decays at Belle.
One is from $\Lambda_c \to pK^-\pi+$ decay where a peak near the $\Lambda \eta$ threshold is observed in the $pK^-$ mass spectrum. We studied the peak shape using a standard Breit-Wigner and Flatte distributions, and found the latter represents the shape by more than...
BESIII has collected 4.5 fb^-1 of e+e- collision data between 4.6 and 4.7 GeV. This unique data offers ideal opportunities to study Lambda_c+ decays. We will report the partial wave analysis of Lambda_c+ -> Lambda pi+ pi0 and the observations of Cabibbo-suppressed Decays Lambda_c+ decays, including Λ+c → nπ+ etc. In addition, we will report the form factor measurement in Lambda_c+ -> Lambda e+...
We discuss the interaction between an anti-D meson and a nucleon, which has recently been studied in LHCb experiments, by considering the meson-exchange potential model. Applying the framework of the heavy-hadron effective theory respecting both chiral symmetry and heavy-quark spin symmetry, we build the potential model by the light-meson exchanging between an anti-D meson and a nucleon. In...
