Prof.
Koji Miwa
(Tohoku university)
Abstract Submission
In order to investigate ΣN interaction, we proposed a Σp scattering experiment (J-PARC E40) to measure differential cross sections of the Σ+p,Σ−p elastic scatterings and the Σ−p → Λn inelastic scattering in the momentum range of 400 < p (MeV/c) < 700.
In January and February 2018, we have performed a commissioning experiment to check the detector system in a few days of beam times. Presently...
Prof.
Hiroyuki Fujioka
(Tokyo Institute of Technology)
Abstract Submission
Double-$\Lambda$ hypernuclei have been investigated for more than half a century, and several double-$\Lambda$ hypernuclei have been found in nuclear emulsion. While they were produced by $\Xi^-$ capture in light nuclei, Kumagai-Fuse and Akaishi proposed a possibility to produce a double-$\Lambda$ hypernucleus as a decay product of a $\Xi$ hypernucleus [1]. According to their calculation, the...
Dr
Yudai Ichikawa
(apan Atomic Energy Agency)
Abstract Submission
We have measured an inclusive missing-mass spectrum of the $^{12}$C$(K^-, p)$ reaction
at the kaon incident momentum of 1.8 GeV/$c$ at J-PARC K1.8 beam line.
This measurement was carried out as a by-product of a pilot run of the J-PARC E05 experiment, which searched for the $\Xi$-hypernuclei via the $^{12}$C($K^{-}$, $K^+$) reaction.
We have compared the observed missing-mass spectrum...
Daniel Gazda
(Nuclear Physics Institute, Czech Academy of Sciences)
Abstract Submission
Charge symmetry in hadron physics is broken in QCD by the up-down quark mass difference and electromagnetic interactions. In $\Lambda$ hypernuclei, charge symmetry breaking (CSB) manifests itself in a sizable charge dependence of $\Lambda$ separation energies of light mirror hypernuclei. The large value of CSB was recently reaffirmed by precision measurements of A = 4 hypernuclei [1, 2] and...
Prof.
Robert Roth
(TU Darmstadt)
Abstract Submission
The ab initio description of nuclear structure and reactions has seen remarkable progress over the past decade, driven by groundbreaking advances in nuclear many-body theory and the advent of two- and multi-nucleon interactions from chiral effective field theory. As a result, ab initio calculations are now possible for an unprecedented range of nuclei and observables.
I will discuss the...
Mrs
Jaroslava Hrtankova
(Nuclear Physics Institute, 250 68 Rez, Czech Republic; Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Brehova 7, 115 19 Prague 1, Czech Republic)
Abstract Submission
We report on our recent analysis of kaonic atom data [1] and consequent
self-consistent calculations of $K^-$ nuclear quasi-bound states in nuclear
many-body systems [2,3]. The single-nucleon $K^-$ optical potential developed
within several chiral meson-baryon coupled-channel interaction models [4-7]
was supplemented by a phenomenological potential representing $K^-$ multinucleon...
Dr
Lorenzo Contessi
(Racah Institute of Physics, The Hebrew University, Jerusalem, Israel)
Abstract Submission
We present an effective field theory (EFT) at leading order to describe light single-$\Lambda$ hypernuclei [1].
Owing to the weak $\Lambda$ binding and to the $\Lambda$-n short interaction range, meson exchange forces are approximated by contact interactions within a pion-less EFT where the only degrees of freedom are baryons.
At leading order the theory contains both 2-body (singlet and...
Mr
Dimitar Mihaylov
(Technical University of Munich)
Abstract Submission
Femtoscopy is a method relating particle correlations to their emission source and interaction potential.
Applying this technique to a small collision system, such as pp, has the advantage of
probing the inner part of the interaction potential.
In order to allow for an accurate determination of the correlation function for small sources,
we have developed a new C++ analysis tool called...
Dr
Jiangming Yao
(University of North Carolina at Chapel Hill)
Abstract Submission
Beyond relativistic mean-field approaches to deformed hypernuclei
J.M. Yao1,2, H. Mei1,3, K. Hagino3,4, and T. Motoba5,6
1 Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27516-3255, USA
2 Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI 48844, USA
3 Department of Physics, Tohoku University, Sendai 980-8578, Japan
4...
Prof.
Chhanda Samanta
(Virginia Military Institue)
Abstract Submission
Recent experiments have presented more accurate data on the ΛΛ-binding energies of a few ΛΛ- hypernuclei. This is important as the ΛΛ- bond energies (ΔBΛΛ) of double-Λ hypernuclei provide a measure of the in-medium strength of the ΛΛinteraction. A mass formula, optimized with the newly available ΛΛ binding energy data, is used to estimate the binding energy and bond energy over a wide range of...
Prof.
Elena Botta
(Universita' di Torino and INFN Sezione di Torino)
Abstract Submission
\documentclass[12pt]{article}
\newcommand{\LL}{$\Lambda$}
\newcommand{\LLs}{$\Lambda$ }
\newcommand{\BL}{$B_{\Lambda}$}
\newcommand{\BLs}{$B_{\Lambda}$ }
\begin{document}
\thispagestyle{empty}
\begin{center}
{ \bf Charge Symmetry Breaking in $s-$ and $p-$shell \LL-hypernuclei: \\ an updated review}
\vspace{5mm}
E.~Botta$^{a,b}$
$^{a}$Dipartimento di Fisica, Universit\`a...
Prof.
Gastao Krein
(Instituto de Fisica Teorica, UNESP)
Abstract Submission
I will review the present knowledge on charmed hypernuclei, charmed mesic nuclei and
heavy quarkonia binding in nuclear matter. I will summarize the main theoretical
approaches and present recent theoretical predictions and relate them to upcoming
experiments in different laboratories.
Prof.
Patrick Achenbach
(Johannes Gutenberg-Universität Mainz)
Abstract Submission
In recent years the method of decay-pion spectroscopy was pioneered at the Mainz Microtron (MAMI). This method has the potential to achieve ground state mass measurements of light hypernuclei with unprecedented precision. Ongoing activities and future projects for the determination of masses of several light hypernuclei, in particular of the hypertriton, will be presented. We are aiming at...
Mr
Kosuke Itabashi
(Tohoku University)
Abstract Submission
The $\Lambda$-hypernuclear spectroscopy is a basic tool to investigate
the interaction between a $\Lambda$ and nucleon ($N$).
We developed a spectroscopic method of $\Lambda$ hypernuclei
with the $(e,e^{\prime}K^{+})$ reaction at the Thomas Jefferson National Accelerator Facility (JLab)~.
The last $(e,e^{\prime}K^{+})$ experiment
resulted in the best energy resolution and accuracy in the...
Dr
Tongtong Cao
(Hampton University)
Abstract Submission
Building a comprehensive picture of the strong interaction is the goal of modern nuclear physics. While considerable progress has been made in the understanding of the nucleon-nucleon (NN) interaction, we are still far from a complete understanding of the hyperon-nucleon (YN) interaction, which plays a key role in hypernuclear matter and neutron stars. For the YN potential, some parameters can...
Dr
Benjamin Gibson
(Los Alamos National Laboratory)
Abstract Submission
\begin{document}
\Large{Determining the Unknown $\Lambda n$ Interaction} \\
\vspace*{6pt}
\large{Benjamin F. Gibson\\
Theoretical Division\\ Los Alamos National Laboratory\\ Los Alamos, NM 87545}
\normalsize
No published data on $\Lambda n$ scattering exist. A relativistic heavy-ion experiment has suggested that a $\Lambda nn$ bound state has been seen [1]. Were that the case, our...
Bishnu Pandey
(Hampton University)
Abstract Submission
The newly approved Jlab experiment E12-17-003 is to search and measure the Λ binding energy (BΛ) and natural width (ΓΛ) of a possible Λnn three-body resonance, using the 3H(e,e’K+)Λnn reaction with the high quality CEBAF electron beam and the Hall A high resolution spectrometers. This resonance, if exists as indicated by the result of HypHI experiment [1] and predicted by theory [2], should be...
Ms
Shin Hyung Kim
(Korea University)
Abstract Submission
The Hyperon Spectrometer has been newly developed for the main tracking system in hadron physics experiments at the J-PARC hadron hall[1-3]. The spectrometer is mainly composed of a time projection chamber(HypTPC) and a superconducting magnet(SC magnet). The HypTPC has the octagonal prism-shaped drift volume with the height of 55 cm, which is filled with P-10 gas. The target is located inside...
Mr
Yuichi Toyama
(Tohoku University)
Abstract Submission
In 2010s, it is reported that lifetime of hypertriton was about 20\% shorter than $\Lambda$ particle by heavy-ion collision experiment groups.
On the other hand, binding energy of $\Lambda$ particle($B_\Lambda$) of hypertriton measured by emulsion experiment is very small($ = 0.13 \pm 0.05$ MeV).
It is difficult to understand shallow bound state and short lifetime of hypertriton...
Dr
Isaac Vidana
(Istituto Nazionale di Fisica Nucleare)
Abstract Submission
In this talk we review some of the effects of hyperons on the properties of neutron and proto-neutron stars with an emphasis on the so-called "hyperon puzzle'', {\it i.e.,} the problem of the strong softening of the equation of state, and the consequent reduction of the maximum mass, induced by the presence of hyperons, a problem which has become more intringuing and difficult to solve due the...
Dr
Petr Bydzovsky
(Nuclear Physics Institute)
Abstract Submission
The cross sections of electroproduction of p-shell hypernuclei were
calculated in the distorted-wave impulse approximation. Previous
calculations performed in the last two decades were updated utilizing new
elementary-production amplitudes and new nucleus-hypernucleus structure
based on the Shell model calculations. Predictions for the cross sections
and excitation-energy spectra of the...
Prof.
Ida Marena Peruzzi
(INFN- Laboratori Nazionali di Frascati)
Abstract Submission
The Belle II experiment, now operating at the KEK laboratory in Japan, is a substantial upgrade of both the Belle detector and the KEKB $e^+ e^-$accelerator. It aims to collect 50 times more data than existing B-Factory samples. Belle II is uniquely capable to study the so-called "XYZ" particles: heavy exotic hadrons consisting of more than three quarks. First discovered by Belle, these now...
Mr
Marc Illa
(Universitat de Barcelona)
Abstract Submission
The instability of hyperons against the weak interaction hampers the direct extraction of baryon-baryon low-energy observables from experiments. In this energy region, a reliable numerical procedure to obtain information of nuclear physics quantities in the strange sector is the Lüscher’s method. Working in a discretized Euclidean space-time, the approach relates the modifications on the...
Dr
Sho Nagao
(Tohoku University)
Abstract Submission
Decay processes of Lambda hypernuclei up to $p$-shell have been measured with many experiments such as the bubble-chambers, the emulsions, and the missing mass spectroscopies. Theoretical calculations are good agreements with these experimental results especially for the mesonic weak decay (MWD) processes, in which a hypernucleus decays emitting with a pion. Decay processes of $s$-shell...
Prof.
Laura Fabbietti
(Technische Universität München)
Abstract Submission
The study of hadron-hadron interactions can be best accessed via scattering experiments. This technique worked very well with nucleons
and also secondary pion- and kaon-beams but becomes a real challenge for short lived hadrons, in particular for hyperons. Since the
hyperon-nucleon and also hyperon-nucleon-nucleon interaction is scarsely known and plays a fundamental role in the...
Dr
Alexander Botvina
(FIAS University of Frankfurt)
Abstract Submission
The study of hypernuclei in deep-inelastic relativistic collisions of
ion and other particle with nuclei open new opportunities for
nuclear/particle physics and astrophysics. We review the main processes
leading to the production of hypernuclei in these reactions: These are
the disintegration of large excited hyper-residues (target- and
projectile-like remnants with captured...
Prof.
Zohreh Davoudi
(University of Maryland)
Abstract Submission
Numerical evaluation of the quantum-mechanical correlation functions in the hypernuclear sector through the method of lattice QCD enables accessing scattering and transition amplitudes involving few nucleons and hyperons. Such studies constrain the low-energy effective interactions, and hence provide the input to ab initio many-body calculations of larger systems with phenomenological...
Dr
Akinobu Dote
(KEK theory center/IPNS, High Energy Accelerator Research Organization)
Abstract Submission
“$K^-pp$” is the most essential system of kaonic nuclei which are expected to have several exotic nature, such as formation of dense state, due to the strong $\bar{K}N$ attraction [1]. Many researchers have eagerly investigated this system from both theoretical and experimental sides for a long time, expecting that the $K^-pp$ might give some hints to reveal detailed nature of kaonic nuclei....
Dr
Takeshi Yamamoto
(KEK IPNS)
Abstract Submission
The charge symmetry breaking (CSB) effect reported in the A=4 mirror hypernuclei
is one of the hot topics in strangeness nuclear physics.
Precise gamma-ray spectroscopy with an energy resolution of a few keV
is a powerful tool to investigate such an effect.
Recently, a gamma-ray spectroscopy study of $^4_{\Lambda}$He was performed
at the J-PARC K1.8 beam line (J-PARC E13) for this...
Dr
Takeshi Koike
(Tohoku University)
Abstract Submission
In 2015, the first hypernuclear gamma-ray spectroscopy experiment at J-PARC has been completed. In this experiment (J-PARC E13), K- beams of 1.5 GeV/c and 1.8 GeV/c are transported through the K1.8 beam line and delivered to a liquid hydrogen target and liquid CF4 target, respectively, to populate $^4_{\Lambda}$H and $^{19}_{\Lambda}$F. In the first half of this contribution, some of the...
Isaac Upsal
(Ohio State University)
Abstract Submission
Non-central heavy-ion collisions have large ($\sim 10^{5} \hbar$) angular momentum which may be transferred, in part, to the quark-gluon plasma through shear forces that generate a vortical substructure in the hydrodynamic flow field. The vortical nature of the system is expected to polarize emitted hadrons along the direction of system angular momentum. $\Lambda$ and $\overline{\Lambda}$...
Prof.
Zou Bing-Song
(Institute of Theoretical Physics, CAS, China)
Abstract Submission
As the lightest charm and beauty baryon, respectively, the $\Lambda_c$ and $\Lambda_b$
are the major decay products of baryons with open or hidden heavy flavors. Various $\Lambda_c$ and $\Lambda_b$ production processes may provide valuable information on the heavy baryon spectroscopy including penta-quark states with hidden charm and beauty. The baryon spectroscopy with open heavy flavor may...
Mr
Sachio Iwasaki
(Tokyo Inst. of Tech.)
Abstract Submission
We find a novel phenomenon induced by the interplay between a strong magnetic field and finite orbital angular momenta in hadronic systems, which is analogous to the Paschen-Back effect observed in the field of atomic physics (1802.04971). This effect allows the wave functions to drastically deform and leads to anisotropic decay. Such anisotropic decay gives a possibility to measure the...
Mr
Takuya Nanamura
(Kyoto University)
Abstract Submission
Spectroscopic study of $\Xi$-hypernuclei provides insights into the $\Xi$-$N$ interaction and the $\Xi N \to \Lambda \Lambda$ coupling strength.
A missing mass spectroscopy of the $\Xi$-hypernuclei was performed via the $^{12}$C$(K^-,K^+)$ reaction at J-PARC K1.8 beam line in 2015, as a pilot experiment of J-PARC E05.
In this measurement, existing magnetic spectrometers, K1.8 beam line...
Benjamin Doenigus
(Goethe-University Frankfurt)
Abstract Submission
The high collision energies reached at the Large Hadron Collider (LHC) at CERN in proton-proton, proton-lead and, in particular, lead-lead collisions, lead to significant production rates of fragile objects, i.e. objects whose binding energies are small compared to the average kinetic energy of the particles produced in the system.
Such objects are, for instance, light (anti-)nuclei and...
Dr
Takashi Inoue
(Nihon University, Coffege of Bioresource Sciences)
Abstract Submission
We extract hyperon forces from QCD on lattice by means of the HAL QCD method,
and then apply them to hyperons in nuclear matter.
Hyperon forces are interesting in many aspects. First, they are in the company of nuclear force. Therefor, it is necessary to know them in order to completely understand baryon-baryon interactions including nuclear force, e.g. why nuclear force has a strong...
Dr
Carlos Granados
(The George Washington University)
Abstract Submission
Using dispersion theory, we calculate the electromagnetic form factors for the transition of a Sigma to a Lambda hyperon at low energy. In this approach, the imaginary part of the form factors is written as a direct product
of the two-pion-Sigma-Lambda amplitudes and the complex conjugate of the pion form factor. The two-pion-Sigma-Lambda amplitudes is also computed through a
procedure...
Dr
Hidekatsu Nemura
(Research Center for Nuclear Physics, Osaka University)
Abstract Submission
We present our recent results of baryon interactions with strangeness $S=-1$ based on Nambu-Bethe-Salpeter (NBS) correlation functions calculated from lattice QCD with almost physical quark masses corresponding to $(m_\pi,m_K)\approx(146,525)$ MeV and large volume $(La)^4=(96a)^4\approx$ (8.1 fm)$^4$. In order to perform a comprehensive study of baryon interactions[1], a large number of NBS...
Prof.
Josef Pochodzalla
(University Mainz and HIM)
Abstract Submission
Recently, the existence of two neutral bound baryonic systems has been suggested: signals for a bound or weakly unbound tetra-neutron were found at RIKEN, the HypHI experiment at GSI Darmstadt provided a hint for a bound strange nn-lambda system. In this introduction to the topical session bound neutral systems I will briefly recall the experimental results and the theoretical challenges which...
Dr
Vladimir Suslov
(North Carolina Central University)
Abstract Submission
The nuclear three-body systems $AAB$ having two identical particles are studied based on the configuration space Faddeev equations. The three-nucleon systems and the kaonic $NN{\bar K}$ clusters are considered. For these systems, we propose two models related to isospin formalism. The first one is based on traditional isospin model and the second one is based on isospin given charge formalism....
Dr
Kristian Piscicchia
(Centro Fermi, LNF (INFN))
Abstract Submission
The AMADEUS collaboration is performing experimental investigations in the low energy strangeness QCD sector.
The K$^-$ nuclear absorbtion processes on light nuclear targets are studied, taking advantage of the monochromatic low-momentum negatively charged kaons produced by the DAΦNE collider and exploiting the KLOE detector as an active target.
The K− single and multi-nuclear absorptions...
Dr
Cheng-jun Xia
(Ningbo Institute of Technology, Zhejiang University)
Abstract Submission
See attached file.
Dr
Philipp Gubler
(JAEA)
Abstract Submission
In this presentation, I will review recent progress in theoretical studies about mesons
containing strange and charm quarks in nuclear matter, especially focusing on the relation
between the modification of meson spectra and QCD condensates. The question of what
observables of meson spectra can be related to the partial restoration of chiral symmetry
in nuclear matter, will also be...
Prof.
Toshio Motoba
(Osaka Electro-communication University and Yukawa Institute for Theoretical Physics)
Abstract Submission
See attached abstract.
Prof.
Humberto GARCILAZO
(Escuela Superior de Fisica Y Matematicas, Instituto Politecnico Nacional, Mexico)
Abstract Submission
The possible existence of neutral stable bound states composed
of nucleons and strange particles will be discussed. In particular,
putting special emphasis in the three- and four-body systems
neutron-neutron-Lambda and neutron-neutron-Lambda-Lambda.
Prof.
Tomofumi Nagae
(Kyoto University)
Abstract Submission
We have measured an excitation energy spectrum of the $^{12}$C($K^-,K^+$)X reaction at 1.8 GeV/c with an energy resolution of 5.4 MeV (FWHM), which is the best energy resolution ever achieved in studying this reaction. The measurement was performed at the K1.8 beam line of the J-PARC hadron experimental hall by using the SKS spectrometer, as a pilot run of J-PARC E05 experiment. The K- beam...
Prof.
Avraham Gal
(Racah Institute of Physics, The Hebrew University, Jerusalem 91904, ISRAEL)
Abstract Submission
In this opening talk at HYP2018 I will recall some old persistent problems in hypernuclear
physics and related strange-particle physics that I encountered as a student, and how
they have developed throughout the last 50 years in shaping one's contemporary perspective
of Strangeness Nuclear Physics.
Mr
Schafer Martin
(Nuclear Physics Institute Rez, Academy of Sciences of Czech Republic, 25069 Rez; Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Brehova 7, 11519 Prague 1, Czech Republic)
Abstract Submission
The possible existence and stability of $\Lambda^{\star}$ (1405) matter was discussed
recently by Akaishi and Yamazaki [1] who conjectured that it is stable against
decay by both strong and weak interactions, thereby providing the absolute
ground state of hadronic matter.
In our own work, in preparation, we used a $\Lambda^{\star}\Lambda^{\star}$ interaction
with short range...
Dr
Dalibor Skoupil
(Faculty of Science, Kyushu University)
Abstract Submission
New isobar models for photo- and electroproduction of kaons on the proton were constructed~[1,2] utilizing new experimental data from LEPS, GRAAL, and particularly CLAS collaborations. Higher-spin nucleon (spin-3/2 and spin-5/2) and hyperon (spin-3/2) resonances were included using the consistent formalism and were found to play an important role in the description of data.
The set of...
Dr
Reinhard Schumacher
(Carnegie Mellon University)
Abstract Submission
The mechanism of baryon-antibaryon photoproduction has not been extensively studied.
Little is known about the dominant exchanges in the $t$-channel or the nature of baryon-like
exchanges in the $u$- channel. At GlueX, we are studying the reactions $\gamma p \to \mathcal{\overline{B}B}$$p$,
where $\mathcal{\overline{B}B}$ includes $\overline{\Lambda}\Lambda$ and ...
Florian Hauenstein
(Old Dominion University)
Abstract Submission
The associated strangeness production in pp interactions has been studied with the COSY-TOF detector in the reaction $\vec{p}p \to
pK^{+}\Lambda$ close to threshold at the COSY accelerator at the research center Juelich in Germany. The underlying reaction mechanisms are not fully understood since perturbative QCD calculations can not be applied at this energy regime. What has been determined...
Dr
Kiyoshi Tanida
(Japan Atomic Energy Agency)
Abstract Submission
Evidence for a narrow $\Lambda^*$ resonance at a mass of
about 1665 MeV (just above the combined mass of the $\Lambda$ ground
state plus the $\eta$ meson) has been seen in the $M(pK^-)$ mass of
the Dalitz plot for $\Lambda_c \to pK^-\pi^+$
decay at the Belle experiment [1].
Additional evidence for this resonance is found in the
partial-wave analysis (PWA) of data on $K^- p$...
Dr
Jean-Christophe David
(CEA)
Abstract Submission
Motivated by a renewed interest of hypernucleus studies, strangeness degree of freedom was implemented in the intranuclear cascade model INCL.
INCL takes care of the first stage of reactions between a nucleon (or a light cluster) and a nucleus at energies from a few tens of MeV up to a few GeV. After emission of fast particles, a hot remnant nucleus is produced and then another model,...
Dr
Natalie Walford
(University of Basel)
Abstract Submission
In a physics world focused on dark matter, gravitational waves, and heavy photons, hadron processes and nuclear systems focusing on strangeness does not garner as much attention. However, the search for undiscovered states of the nucleon continues to yield interesting results. A large effort was done using the now defunct CEBAF Large Acceptance Spectrometer (CLAS) detector at the Thomas...
Prof.
Patrick Achenbach
(Johannes Gutenberg-Universität Mainz)
Abstract Submission
The main objective of this contribution is to provide a framework for a panel discussion in the topical session on charge symmetry breaking in light hypernuclei.
Prof.
Jung Keun Ahn
(Korea University)
Abstract Submission
Recent Lattice QCD predictions for the mass of H-dibaryon pointing to the mass region near $\Lambda\Lambda$ and $\Xi^-p$ thresholds encourage experimental searches. A dedicated experiment (J-PARC E42) is designed to measure $\Lambda p\pi^-$, $\Lambda\Lambda$ and $\Xi^-p$ decays from the H-dibaryon in the 12C(K-,K+) reaction at the K1.8 beam line of J-PARC. A new superconducting Hyperon...
Mr
Hiroyuki Ekawa
(Kyoto University)
Abstract Submission
Understanding of baryon-baryon interaction is one of the main topics in hadron physics.
In comparison with $S=0$ and $-1$, experimental data of $S=-2$ system is very limited.
Hyperon - hyperon interaction is especially difficult to study because of their short life-times.
Therefore, double hypernuclei, which include two $\Lambda$ hyperons in a nucleus, play an important role
to investigate...
Dr
Neha Shah
(S.V. National Institute of Technology, India and Shanghai Institute of Applied Physics, China)
Abstract Submission
Content
The N$\Omega$ state with JP = $2^{+}$ and I = 1/2 are interesting candidates among the exotic hardons [1]. Unlike the deuteron, the N$\Omega$ state can be a compact six-quark state. Several attempts have been made to estimate the binding energy of the N$\Omega$ state in different quantum chromodynamics motivated models and they predict a bound state for the N$\Omega$. The two-particle...
Prof.
John Millener
(BNL)
Abstract Submission
I will try to put the new data from the J-PARC E13 Collaboration
on gamma rays in Lambda-19F in context with the existing data on
p-shell hypernuclei.
Prof.
John Millener
(BNL)
Abstract Submission
In contrast to the situation for the A=4 hypernuclei, there is
little definitive evidence for charge-symmetry breaking in p-shell
hypernuclei. Nevertheless, I will explore what Lambda-Sigma coupling
and the introduction of differences between the Lambda-p and Lambda-n
interactions can provide.
Dr
Isaac Vidana
(Istituto Nazionale di Fisica Nucleare)
Abstract Submission
In this talk we present a calculation of the spectral function of the $\Lambda$ hyperon in finite nuclei which is obtained from the corresponding $\Lambda$ self-energy constructed within a perturbative many-body approach using some of the hyperon-nucleon interactions of the Juelich and Nijmegen groups. Binding energies, wave functions and disoccupation numbers
of different single-particle...
Dr
Hans-josef Schulze
(INFN Catania)
Abstract Submission
A Lambda-nucleon Skyrme force suitable for reproducing the observed binding
energies of the whole range of known light and heavy single-lambda
hypernuclei is presented. Notable exceptions are identified and examined in
comparison with a cluster model for the hypernuclear structure. The ...
Dr
Hidemitsu Asano
(RIKEN)
Abstract Submission
The structure of the $\Lambda$(1405) is an important and long-standing issue
to understand the $\bar{K}$-nucleus interaction.
The J-PARC E31 experiment has been performed to investigate the $\Lambda$(1405)
spectrum shape.
Because it is hard to form the $\Lambda$(1405) directly by a $\bar{K} N$
scattering in free space, E31 uses the d(K$^-$,n) reaction
with an incident kaon momentum of 1...
Dr
Toshiyuki Gogami
(Tohoku University)
Abstract Submission
We performed spectroscopy of $^{7}_{\Lambda}$He and $^{10}_{\Lambda}$Be with the $(e,e^{\prime}K^{+})$ reaction at JLab Hall C. The ground state binding energies of these hypernuclei provides insights into the p-shell CSB by comparing isotopic mirror partners. In the latest hypernuclear experiment, JLab E05-115, we could successfully update the binding energies with a smaller error than that...
Prof.
Satoshi N. Nakamura
(Tohoku University)
Abstract Submission
Spectroscopic study of electro-produced Lambda hypernuclei has started at Jefferson Lab in the last year of the 20th century.
Though it is known that spectroscopy of electro-produced hypernuclei has unique feature over other meson-produced hypernuclear spectroscopy, there exist many experimental difficulties such as small production cross section, huge electron background and so on.
We,...
Mr
Shuhei Hayakawa
(Osaka University)
Abstract Submission
The nucleon-nucleon interaction, the nuclear force, has been studied for more than half a century.
The study of hyperon-nucleon and hyperon-hyperon interactions is necessary for understanding of general baryon-baryon interaction.
However, it is difficult to produce an intense hyperon beam due to the very short life time of hyperons.
Further, it is almost impossible to use hyperons as the...
Dr
Junya Yoshida
(Advanced Science Research Center, JAEA)
Abstract Submission
J-PARC E07 is a unique experiment at J-PARC to investigate double strangeness nuclei with hybrid emulsion method. It was designed to obtain ten times more double strangeness nuclei than that obtained by previous experiments. Moreover, it aims the first measurement of X-ray from Xi-atom by Germanium detector.
Beam exposure of E07 and photographic development of emulsion sheets are...
Mr
Michael Bölting
(Helmholtz Institute Mainz)
Abstract Submission
The spectroscopy of $S=-2$ nuclei is a unique project of the \panda Collaboration at FAIR. Both planned measurements will complement ongoing activities at J-PARC.
The first measurement will for the first time explore the excitation spectrum of $\Lambda\Lambda$ hypernuclei, while the second will measure X-ray cascades from heavy $\Xi^-$-atoms.
The main components of the setup are
- a...
Dr
Diego Lonardoni
(Facility for Rare Isotope Beams (FRIB) and Los Alamos National Laboratory (LANL))
Abstract Submission
The appearance of strange baryons in the inner regions of a neutron star (NS), where the density can exceed several times the nuclear saturation density, is likely to happen due to energetic considerations. The onset of strange degrees of freedom is considered as an effective mechanism to soften the equation of state (EoS). This softening affects the entire structure of the star, reducing the...
Dr
Thomas Jude
(The University of Bonn)
Abstract Submission
The BGO-OD experiment at the ELSA accelerator facility uses an energy tagged bremstrahlung photon beam to investigate the internal structure of the nucleon. The setup consists of a highly segmented BGO calorimeter surrounding the target, with a particle tracking magnetic spectrometer at forward angles.
BGO-OD is ideal for investigating low momentum transfer processes due to the acceptance...
Prof.
Hiyama Emiko
(Kyushu University)
Abstract Submission
Recently, the Kiso event was observed as a bound state. From the data, we found that ΞN interaction should be attractive. Furthermore, it is planned to measure Ξ binding energy using 12C target by (K^-,K^+) reaction. Now it is requested to extract information on ΞN interaction from the data. In the conference, within the framework of \alpha+\alpha+t+Ξ four-body model, I discuss on this issue.
Prof.
Hiyama Emiko
(Kyushu University)
Abstract Submission
Since the observation of Ξ hypernucleus, Kiso event, it is requested what kinds of Ξ hypernuclei should be observed as bound states in the future at J-PARC. As light Ξ hypernuclei, I propose to perform a search experiment of nnΞ and nnnΞ systems using 3He and 4He targets. In this conference, from the observation what kinds of ΞN part we can get to extract information.
Dr
Masahiro Yoshimoto
(Gifu University)
Abstract Submission
Nuclear emulsion is a tracking detector with sub-micron spatial resolution.
The nuclear emulsion has a potential to measure binding energies of mirror hypernuclei such as $_{\Lambda}^{4}$H and $_{\Lambda}^{4}$He directly.
The binding energies provide valuable information for charge symmetry braking (CSB) in $\Lambda$-N interaction.
In the nuclear emulsion experiment in the 1960s and...
Dr
Alessandro Feliciello
(INFN - Sezione di Torino)
Abstract Submission
In the last decade several targetted, well focussed experiments provided a remarkable amount of high quality information about $s$-, $p$- and, very recently, $sd$-shell $\Lambda$-hypernuclei.
Their results contribute to significantly improve our knowledge of the field.
However, some ''surprising'' outcomes came from non-dedicated large apparatus like STAR and ALICE, originally intended for...
Dr
Franco Garibaldi
(INFN)
Abstract Submission
The recent observation of 2-solar-mass neutron-stars rules out most of the current models for the hyperonic matter equation of state which favour the appearance of hyperons in the neutron star interior but predict maximum masses (Mmax) incompatible with present data.
This problem, known as the hyperon-puzzle, is presently a subject of very active research. A solution to it necessarily...
Prof.
Susumu Shimoura
(Center for Nuclear Study, the University of Tokyo)
Abstract Submission
See attached pdf file.
Dr
Albert Feijoo Aliau
(Nuclear Physics Institute, 25068 Rez, Czech Republic)
, Prof.
Volodymyr Magas
(University of Barcelona)
, Prof.
Àngels Ramos
(University of Barcelona)
Abstract Submission
The plausible explanation of the $\Lambda(1405)$ resonance as a molecular state arising from coupled channel meson-baryon re-scattering in the strangeness $S=-1$ sector employing the lowest order chiral Lagrangian is one of the most important successes of Unitaritzed Chiral Perturbation Theory (UChPT). Despite this theoretical breakthrough, the aim for more precise calculations led the...
Dr
Stefano Gandolfi
(Los Alamos National Laboratory)
Abstract Submission
Recent advances in experiments of the symmetry energy of nuclear matter and in neutron star observations yield important new insights on the equation of state of neutron matter at nuclear densities. In this regime the equation of state of neutron matter plays a critical role in determining the mass-radius relationship for neutron stars. We show how microscopic calculations of neutron matter,...
Prof.
Luis Augusto Trevisan
(Universidade Estadual de Ponta Grossa)
Abstract Submission
In the Present work, the effects of the nonextensivity are considered in a model to obtain the polarized structure function for the proton and the neutron, including the strange contribution for each one. Any type of symmetry is considered as a consequence of the experimental data involved. Therefore, we may show that the total amount of strange quarks is proton is different from the neutron,...
Dr
madhumita dhar
(Balurghat College)
Abstract Submission
A revised version of SU(3) based meson exchange interaction model has been developed in this work to investigate vacuum hyperon-baryon interaction for the SU(3) octet. The main focus on revising the other existing OBE model was in reducing the number of free parameter of the model since the number of data available are very less and to have a qualitative knowledge on the extent of SU(3)...
manami fujita
(tohoku Univ)
Abstract Submission
Studying hyperon-nucleon interaction is necessary for more general understanding of nuclear force. We can extend the NN interaction with the isospin SU(2) symmetry to the baryon-baryon interactions with the flavor SU(3) symmetry. For the S=-2 sector, however, experimental data are very limited. Especially there are almost no data for the ΞN interaction. To investigate the S=-2 systems, we...
