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Prof. Tomofumi Nagae (Kyoto University)25/09/2017, 16:45Hadrons in matter including hypernucleiTalk
At J-PARC, we are conducting spectroscopic studies of strangeness -2 systems, such as ฮ- and double-ฮ hypernuclei. The experimental information on these systems is so far
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limited with several emulsion events; the โNagaraโ event for ฮฮ6He and the โKisoโ event
for a strong candidate of a ฮ hypernucleus. In this talk, I will introduce a preliminary result
on ฮ12Be obtained in the pilot run of E05... -
Prof. Emiko Hiyama (RIKEN)25/09/2017, 17:10Hadrons in matter including hypernucleiTalk
It is important to study \Xi N interaction in hypernuclear physics. However, due to no \Xi N scattering data, it is essentail to study \Xi hypernuclei. Recently, we observed a \Xi hypernuclues,called as Kiso event, to have a bound state for the first time. From this data, we found that \Xi N interaction should be attractive. In this conference, we discuss that what kind of \Xi N interaction...
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Stefania Bufalino (Politecnico di Torino (IT))25/09/2017, 17:30Hadrons in matter including hypernucleiTalk
In the last decade, heavy-ion collision experiments have brought new insight to the study of (anti-)hypernuclei. Experiments using heavy ion collisions for hypernuclear research focus on two distinct aspects: the production mechanism and the lifetime estimation, in particular for the hypetriton. The ALICE experimental observations which allow to test models of the production mechanism...
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Martin Cleven (Departament de Fisica Quantica i Astrofisica and Institut de Ciencies del Cosmos, Universitat de Barcelona)25/09/2017, 17:50Hadrons in matter including hypernucleiTalk
With various experiments studying heavy-ion collisions a demand exists in the hadron physics community for theoretical predictions of hadronic properties at temperatures and densities far from standard nuclear physics scenarios. In this work we will study the implications of light-quark mesonic matter at finite temperatures on the open and hidden charm mesons. We will apply a chiral unitary...
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Daiki Suenaga (Nagoya University)25/09/2017, 18:10Hadrons in matter including hypernucleiTalk
We investigate the in-medium masses of a $\bar{D}$ $(0^-)$ meson and a $\bar{D}_0^*$ $(0^+)$ meson, and spectral functions for $\bar{D}$
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and $\bar{D}_0^*$
meson channels in nuclear matter.
These mesons are introduced as chiral partner in the chiral symmetry broken vacuum,
hence they are useful to explore the partial restoration of the broken chiral symmetry in nuclear matter.
We consider... -
Gal Avraham (Racah Institute of Physics, The Hebrew University, Jerusalem 91904, ISRAEL )26/09/2017, 16:45Hadrons in matter including hypernucleiTalk
Mesic nuclei in which a meson is bound by the strong interactions to atomic nuclei have been predicted for antikaons, eta and eta', omega and phi mesons, and for other mesons of mass above 1 GeV. While experimental searches are ongoing in several accelerator facilities for antikaons, eta and eta' mesons, no unambiguous identification of mesic nuclei has ever been achieved, partly owing to...
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Johann Zmeskal (Austrian Academy of Sciences (AT))26/09/2017, 17:10Hadrons in matter including hypernucleiTalk
The understanding of the strong interaction between hadrons in the strangeness sector are an
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important testing ground for chiral SU(3) symmetry due to the large mass of the strange quark.
The antikaon-nucleon interaction at low energy is studied using non-perturbative coupled-
channel techniques based on chiral SU(3) effctive Lagrangians.
With SIDDHARTA kaonic hydrogen and helium atoms were... -
laura fabbietti (Technische Universitรคt Mรผnchen)26/09/2017, 17:30Hadrons in matter including hypernucleiTalk
Several experiments have been devoted to the study of the antikaon properties within nuclear matter to understand the interaction between antikaons and nucleons at different density conditions. Experimental evidence delivered by kaonic atoms, kaon scattering data and the existence of the L(1405) resonance proves the antikaon-nucleon interaction to be attractive in the vacuum but the behavior...
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Prof. Masahiko Iwasaki26/09/2017, 17:55Hadrons in matter including hypernucleiTalk
By embedding mesons into nuclei and studying the property change of those particles in nuclear media, one can access the physics at densities beyond standard nuclear density, e.g., in neutron star matter, as well as the origin of matter (hadron) mass, in which the standard scenario is that the hadron masses are generated by the spontaneous chiral symmetry breaking of the vacuum. In this...
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Takayasu Sekihara (Japan Atomic Energy Agency)26/09/2017, 18:15Hadrons in matter including hypernucleiTalk
Recently, a peak structure was observed near the $K^- p p$ threshold in the in-flight ${}^3 {\rm He} (K^- , \Lambda p) n$ reaction of the E15 experiment at J-PARC. This peak could be a signal of the lightest kaonic nuclei, that is, the $\bar{K} N N (I=1/2)$ state, which has been intensively studied both experimentally and theoretically in the last decade. In this contribution we theoretically...
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Dr Kenta Itahashi (RIKEN)28/09/2017, 16:45Hadrons in matter including hypernucleiTalk
Spectroscopy of meson-nucleus bound systems provide precious opportunities to study low-energy QCD in view of partial restoration of the chiral symmetry in nuclear medium. Non-perturbative nature of the QCD in the low energy region exhibits many interesting features, which include chiral symmetry breaking, non-trivial structure of vacuum, and so on. We will discuss recent progress and future...
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Pawel Moskal (Jagiellonian University (PL))28/09/2017, 17:10Hadrons in matter including hypernucleiTalk
We will report on the status of the search for the eta-mesic nuclei and the studies of the interaction of the eta and eta-prime meson with nucleons. The existence of the eta-mesic nucleus was postulated over twenty nine years ago, however, till now it was not confirmed experimentally. Such system in the form of the eta mesic-helium may be created for example in the deuteron-deuteron or...
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Dr Mariana Nanova (II. Phys. Inst., University of Giessen , Germany)28/09/2017, 17:30Hadrons in matter including hypernucleiTalk
The real part of the $\eta^\prime$-nucleus potential has been determined at low momenta by analyzing the $\eta^\prime$ kinetic energy distribution and the excitation function in photoproduction of of $\eta^\prime$ mesons off C in coincidence with forward going protons. The forward going protons take over most of the momentum of the incoming photon beam and thus their detection allows the study...
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Jiri Mares (N)28/09/2017, 17:50Hadrons in matter including hypernucleiTalk
Recent theoretical studies of eta nuclear quasi-bound states in few- and many-body
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systems are reviewed [1,2,3,4].
Underlying energy-dependent eta-N interactions are derived from coupled-channel models
that incorporate the N*(1535) resonance. The role of self-consistent treatment of the
strong energy dependence of the subthreshold eta-N amplitudes is discussed.
Binding energies and... -
Angel Gomez Nicola (Universidad Complutense Madrid)28/09/2017, 18:10Hadrons in matter including hypernucleiTalk
The nature of chiral symmetry restoration and the identification of its correct pattern in terms of $O(4)$ and $U(1)_A$ restoration are central problems for our present understanding of the QCD phase diagram, which are not fully settled in lattice simulations. We will present a theoretical analysis based on Ward Identities which sheds light on this issue and where partner degeneration is...
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Josef Pochodzalla (Institut fur Physik)29/09/2017, 11:15Hadrons in matter including hypernucleiTalk
In a recent experiment performed at the electron accelerator MAMI a systematic study on the ground state binding energy of hyperhydrogen 4LH was performed. The energy was deduced from the spectroscopy of mono-energetic pions from the two-body decays of hyperfragments, which were produced and stopped in a 9Be target. While the ground state binding energy difference of DBL(0+g.s.)...
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Mr Satoshi Nakamura (Tohoku University)29/09/2017, 11:40Hadrons in matter including hypernucleiTalk
Spectroscopic study of Lambda hypernuclei has started at Jefferson Lab in 2000, the last year of the 20th century.
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There were many experimental difficulties such as small production cross section, huge electron background and so on.
We, finally, established the Lambda hypernuclear spectroscopy with electron beam by introducing novel experimental techniques and efforts of more than a... -
Prof. Patrick Achenbach (Mainz University)29/09/2017, 12:00Hadrons in matter including hypernucleiTalk
Recent high-precision measurements in light hypernuclei using magnetic spectrometers have changed our knowledge of the $\Lambda N$ interaction. Accessible observables are $\Lambda$ binding energies, excitation spectra (if particle-bound excited states exist), spins, lifetime and decay branching ratios. Substantial differences between emulsion studies and recent magnetic spectrometer...
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Hiroaki Ohnishi (Research Center for Electron Photon Science, Tohoku University)29/09/2017, 12:20Hadrons in matter including hypernucleiTalk
In Universe there are many varieties of matter created by the strong interaction, such as hadrons,
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nuclei and the very high density quark matter which might be formed inside a neutron star. Because
those particles and matter are generated by the strong interaction, the theory of strong interaction,
i.e. the Quantum Chromo dynamics(QCD), will give answers how those states are forming... -
Dr Javier Cobos-Martinez29/09/2017, 12:40Hadrons in matter including hypernucleiTalk
The mass and decay width of the $\phi$ meson in cold
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nuclear matter are computed in an effective Lagrangian approach. The medium dependence of these properties are obtained by evaluating kaon-antikaon loop contributions to the $\phi$ self-energy, employing the medium-modified kaon masses, calculated using the quark-meson coupling model. The loop integral is regularized with a dipole form...
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