Dr
Chengping Shen
(Fudan University)
18/08/2019, 14:00
Session 2: Baryon spectroscopy
Leading parallel
The spectrum of hyperon with S=-2,-3 are still not well known.
The large data sample accumulated by the Belle experiment at KEKB asymmetric energy $e^+ e^-$ collider provide
a unique opportunity to study these hyperons.
In this presentation, we report observation and evidence of $\Xi(1620)$ and $\Xi(1690)$ in the $\Xi_c \to \Xi\pi\pi$ decay,
and observation of new excited Omega- baryon...
Dr
Kiyoshi Tanida
(Japan Atomic Energy Agency)
18/08/2019, 14:25
Session 2: Baryon spectroscopy
Parallel
$\Lambda_c(2765)^+$ (or $\Sigma_c(2765)$) is the lightest charm baryon of which presumable identification by quark models is not known.
Currently, its properties are poorly known: $J^P$ and isospin are not determined and no uncertainty is given in the width measurement.
With 980 $\mathrm{fb}^{-1}$ $e^+e^-$ collision data collected with Belle detector, we perform the determination of quantum...
Prof.
Sixue Qin
(Chongqing University)
18/08/2019, 14:45
Session 2: Baryon spectroscopy
Parallel
Nucleons, fundamental blocks of the world, carry almost all mass of the visible Universe. In Standard Model, nucleons are bound states of quarks and gluons via strong interaction which is described by quantum chromodynamics (QCD). Nucleons are members of a large family of baryons. Non-perturbative features of QCD, confinement and dynamical chiral symmetry broken, are the key to understand...
Kanchan Khemchandani
(U)
18/08/2019, 15:05
Session 2: Baryon spectroscopy
Parallel
In this talk we present our latest study on pseudoscalar-baryon and vector baryon coupled channel interactions. The formalism consists of calculations of s-, t, and u-channel diagrams for all channels and use the sum of such diagrams as kernels to solve Bethe Salpeter equation. The vertices, to calculate the lowest order amplitudes, are taken from chiral and hidden local symmetry Lagrangians....
Prof.
Hyun-Chul Kim
(Inha University)
18/08/2019, 15:25
Session 2: Baryon spectroscopy
Parallel
We present briefly a series of recent works on singly heavy baryons in a pion mean field approach. In the limit of infinitely heavy-quark mass, the singly heavy baryon can be considered as a baryon that consists of Nc - 1 light valence quarks. The presence of the Nc - 1 valence quarks create the pion mean fields that arise from the vacuum
polarization. Using this approach, we are able to...
Laura Tolos
(U)
20/08/2019, 14:00
Session 2: Baryon spectroscopy
Parallel
The LHCb Collaboration has discovered five excited $\Omega_c$ states with masses between 3 and 3.1 GeV [1], four of them recently corroborated by the Belle Collaboration [2]. Moreover, the LHCb Collaboration has recently reported one $\Xi_b(6227)$ state [3], whereas several $\Xi_c$ states are described in the PDG. Indeed, one $\Xi_c$ at 2930 MeV was first reported by the BaBar Collaboration...
Dr
Maojun Yan
(ITP, CAS)
20/08/2019, 14:25
Session 2: Baryon spectroscopy
Parallel
The discovery of $\Xi_{cc}^{++}$ by the LHCb Collaboration triggers
predictions of more doubly charmed baryons. By taking into account both the $P$-wave
excitations between the two charm quarks and the scattering of light pseudoscalar mesons off the ground state doubly charmed baryons, a set of
negative-parity spin-1/2 doubly charmed baryons are predicted already from a unitarized version...
Yin Huang
(B)
20/08/2019, 14:45
Session 2: Baryon spectroscopy
Parallel
We study the $\bar{K} \Xi$ decay mode of the newly observed
$\Omega(2012)$ assuming that the $\Omega(2012)$ is a dynamically
generated state with spin-parity $J^P = 3/2^-$ from the coupled
channel $S$-wave interactions of $\bar{K}\Xi(1530)$ and $\eta \Omega$.
In addition we also calculate its three-body decay width into $K\pi\Xi$.
It is shown that the so-obtained total decay width is...
Yong-Hui Lin
(Institute of Theoretical Physics, CAS)
20/08/2019, 15:05
Session 2: Baryon spectroscopy
Parallel
We investigate the observed pentaquark candidates $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$ from the latest LHCb measurement, as well as four possible spin partners in the $\bar{D}^{(*)}\Sigma_c^*$ system predicted from the heavy quark spin symmetry with the hadronic molecule scenarios. Similar to the previous calculation on $P_c(4380)$ and $P_c(4450)$, the partial widths of all the allowed...
Mr
Ao Xu
(清华大学)
20/08/2019, 16:15
Session 2: Baryon spectroscopy
Parallel
The LHCb experiment has been continually producing interesting results of heavy baryon spectroscopy, owing to the large data sample of heavy flavor hadrons provided by the LHC and the excellent performance of the delicately designed detector. This talk will present the latest results of conventional heavy baryons from the LHCb experiment, including discoveries of new states and measurements of...
Dr
Yonggoo Heo
(Suranaree Univ. of Technology)
20/08/2019, 16:40
Session 2: Baryon spectroscopy
Parallel
We study the light quark-mass dependence of charmed baryon masses as measured by various QCD lattice collaborations. A global fit to such data based on the chiral SU(3) Lagrangian is reported on. All low-energy constants that are relevant at next-to-next-to-next-to-leading order (N$^3$LO) are determined from the lattice data sets where constraints from sum rules as they follow from large-$N_c$...
Er-Liang Cui
(Beihang University)
20/08/2019, 17:00
Session 2: Baryon spectroscopy
Parallel
In this talk, I would like to report our recent study on decay properties of a few heavy favor baryons, including the excited bottom baryons, $\Sigma_{b}(6097)^{\pm}$, $\Xi_{b}(6227)^-$ and the doubly charmed baryons $\Xi_{cc}^{*++}$. We utilize the method of light-cone sum rules, which is widely used to study the hadron decays in recent years. Our estimations suggest that the bottom baryons...
Shuntaro Sakai
(I)
20/08/2019, 17:20
Session 2: Baryon spectroscopy
Parallel
In order to study the properties of the $N^∗(1535)$ and $N^∗(1650)$ we calculate the mass distributions of $MB$ in the $Λ_c\rightarrow \bar{K}^0MB$ decay, with $MB=\pi N(I= 1/2)$, $\eta p$ and $K\Sigma(I= 1/2)$. We do this by calculating the tree-level and loop contributions, mixing pseudoscalar-baryon and vector-baryon channels using the local hidden gauge formalism. The loop contributions...
Dr
Yubing Dong
(Institute of High Energy Physics)
21/08/2019, 08:30
Session 2: Baryon spectroscopy
Leading parallel
In this presentation, we briefly review the study of newly observed dibaryon resonance d*(2380) (IJP=03+), and in particular, the recent studies of this resonance based on a chiral constituent quark model. The model calculations for its mass and wave function exhibit that it may be assigned as a compact hexaquark system with a dominant hidden-color component. The good explanations for the...
Rafael Pavao
(IFIC)
21/08/2019, 08:55
Session 2: Baryon spectroscopy
Parallel
In this work we study the possibility that the newly observed Ω(2012) is a molecular state dynamically generated from the KΞ*, ηΩ and KΞ channels. Using this picture, we find a state that has a large coupling to KΞ*, which can be observed in the Ω(2012) → KπΞ decay. This three body decay is automatically incorporated in our chiral unitary approach by considering the mass distribution of Ξ*...
Dr
Ju-Jun Xie
(IMP, CAS, China)
21/08/2019, 09:15
Session 2: Baryon spectroscopy
Parallel
A $\Sigma^*$ resonance with spin-parity $J^P = 1/2^−$ and mass in the vicinity of the $\bar{K}N$ threshold has been predicted in the five quark ficture and the unitary chiral approach. In this talk, based on the dominant Cabibbo favored weak decay mechanism, we perform a study of $\Lambda^+_c$ decays for studying the possible $\Sigma^*$ state decaying into $\pi \Lambda$ or $\pi \Sigma$. We...
Dr
Bao-Xi Sun
(Beijing University of Technology)
21/08/2019, 09:35
Session 2: Baryon spectroscopy
Parallel
The pion-nucleon interaction is an interesting topic and has attracted more attentions of the nuclear society in the past decades.
There are two very closed excited states of the
nucleon in the $S_{11}$ channel, $N(1535)$ and $N(1650)$, which are
difficult to be described within the framework of the constituent
quark model. However, in the unitary coupled-channel
approximation of the...
Kai Xu
(Suranaree University of Technology)
21/08/2019, 09:55
Session 2: Baryon spectroscopy
Parallel
$N(1685)$ was firstly reported in the photoproduction of $\eta$ meson off the quasi-free neutron. Unlike other low-lying nucleon resonances whose Breit-Wigner (BW) widths are at least $100 {\;\rm MeV}$, the BW width of the $N(1685)$ is less than $30 {\;\rm MeV}$. The interpretation of the $N(1685)$ is still an open question.
The non-strange pentaquark mass of all quark configurations...
Dr
Kiyoshi Tanida
(Japan Atomic Energy Agency)
21/08/2019, 10:45
Session 2: Baryon spectroscopy
Parallel
A time-projection chamber, HypTPC has been developed at J-PARC
for hadron spectroscopy experiments. HypTPC has a large
acceptance thanks to the internal target system and a
high-rate capability up to 1 MHz or even higher.
So far, three experiments are planned with HypTPC,
namely, H-dibaryon search experiment (E42),
baryon spectroscopy experiment with (pi,pipi) reactions (E45),
and a new...
Mr
Georg Scheluchin
(BGO-OD)
21/08/2019, 11:10
Session 2: Baryon spectroscopy
Parallel
Hadron spectroscopy is used to investigate the degrees of freedom of the constituents of the nucleon. Since the conception of the quark model, there have been descriptions of baryons and mesons with more then three and two valence quarks respectively. Such hadrons could manifest as penta- and tetraquarks, or as meson-meson and meson-baryon molecular like states. Candidates for such exotic...
Mr
Yubo Li
(Peking Uniersity)
21/08/2019, 11:30
Session 2: Baryon spectroscopy
Parallel
The branching fractions of ground state charmed baryon are not measured so far except for the $\Lambda_c$.
Only the branching fractions relative to the primary decay modes are measured.
The measurement is important to test our understanding of weak decay of baryons and measurement of absolute production cross sections.
We report first measurement of the absolute branching fraction of...
Dr
De-Liang Yao
(Hunan University)
21/08/2019, 11:51
Session 2: Baryon spectroscopy
Parallel
Neutral current single pion production induced by neutrinos and antineutrinos on nucleon targets has been investigated in manifestly relativistic baryon chiral perturbation theory with explicit $\Delta(1232)$ degrees of freedom up to $\mathcal{O}(p^3)$. At low energies, where chiral perturbation theory is applicable, the total cross sections for the different reaction channels exhibit a...
