Conveners
Hadrons in Hot and Cold Medium: 1
- Laura Fabbietti (TUM)
Hadrons in Hot and Cold Medium: 2
- Tullio Bressani (INFN-Sezione di Torino)
Hadrons in Hot and Cold Medium: 3
- Wolfram Weise (Technische Universität München)
Hadrons in Hot and Cold Medium: 4
- Tomofumi Nagae (Kyoto University)
Description
Heavy ions, mesons in nuclei, and hypernuclei
Dr
Stefania Bufalino
(INFN-TORINO)
6/13/11, 2:30 PM
Hadrons in Hot and Cold Medium
talk
The information coming from the study of the Lambda-hypernuclei weak decay channels complements the knowledge of strange nuclear systems obtained by both missing mass and gamma-ray spectroscopy measurements. Lambda-hypernuclei decay through both the mesonic weak
decay (MWD) and the non-mesonic weak decay (NMWD) processes.
In particular, recently, the two-nucleon induced (2N) NMWD has been...
Prof.
Elena Botta
(INFN-Sezione di Torino and Universita’ di Torino)
6/13/11, 2:55 PM
Hadrons in Hot and Cold Medium
talk
The replacement of a nucleon with a Λ hyperon leads to the production of Λ-hypernuclei. These strange systems are more stable than ordinary nuclei due to the compression of the nuclear core and to the addition of an extra binding energy from the Λ hyperon, which plays the so called “glue-like” role, being free from the Pauli blocking effect. In this respect, Λ-hypernuclei are better candidates...
Dr
Tomoichi Ishiwatari
(Stefan-Meyer-Institut fuer subatomare Physik)
6/13/11, 3:15 PM
Hadrons in Hot and Cold Medium
talk
An energy shift of the 2p level of kaonic 3He and 4He atoms is recently
studied in theory and experiment. A theory predicting deeply bound
kaonic nuclear states estimates a significant energy shift in kaonic
3He or 4He. The SIDDHARTA experiment measured the kaonic 3He and 4He
3d-2p X-ray transitions at the DAFNE e+e- collider. The strong interaction
shifts of the kaonic 3He and 4He 2p...
Dr
Shinji Okada
(LNF-INFN)
6/13/11, 3:35 PM
Hadrons in Hot and Cold Medium
talk
The SIDDHARTA collaboration have measured the K-series x-rays of kaonic hydrogen atoms with significant improvements over the previous experiments, and precisely determined the strong-interaction energy-level shift and width of the 1s atomic state. The measurement offers a unique possibility to determine the KN s-wave scattering lengths, which is one of the most important observable to...
Dr
Mariana Nanova
(II. Physikalisches Institut, Universität Giessen)
6/14/11, 4:30 PM
Hadrons in Hot and Cold Medium
talk
Mariana Nanova
University of Giessen, Germany
for the CBELSA/TAPS Collaboration
Studies of in-medium properties of the η' meson will be presented. The photoproduction of η' mesons off 12C, 40Ca, 93Nb and 208Pb nuclei has been measured. The experiment was performed at the ELSA accelerator in Bonn with the combined setup of the Crystal Barrel and TAPS detectors. Recent results on the...
Mrs
Raquel Molina
(IFIC)
6/14/11, 4:50 PM
Hadrons in Hot and Cold Medium
talk
The properties of the K*- meson in dense matter are studied using a unitary approach in coupled channels within the framework of the local hidden gauge formalism. We obtain the K*- spectral function in the nuclear medium and we found that the K*- develops an in-medium width up to five times bigger than in free space. We also estimate the transparency ratio of the \gamma A -> K+ K*- A'...
Mr
Andrey Polyanskiy
(IKP, FZ Jülich)
6/14/11, 5:10 PM
Hadrons in Hot and Cold Medium
talk
The production of $\phi$-mesons in collisions of 2.83 GeV protons
with C, Cu, Ag and Au targets has been measured with the ANKE
magnetic spectrometer at the Cooler Synchrotron COSY. The $\phi$
was detected at small angles via its $K^+K^-$ decay branch. The
measured target mass dependence of the production cross section can
be related to the in-medium $\phi$ width. Comparisons...
Dr
Paul Buehler
(Stefan Meyer Institute, VIenna)
6/14/11, 5:30 PM
Hadrons in Hot and Cold Medium
talk
With the PANDA detector at the HESR at FAIR it will be possible to study the production of charmed hadrons on nuclear targets. One reactions of particular interest is the formation of J/Psi mesons when a nuclear target is bombarded with antiprotons. If the momentum of the incident antiprotons is properly selected, then they can annihilate with protons in the nucleus of a target atom and form a...
Mr
Satoshi Itoh
(University of Tokyo)
6/14/11, 5:50 PM
Hadrons in Hot and Cold Medium
talk
Precision spectroscopy of pionic atoms provide unique information on the isovector πN interaction which connected to reduction of the chiral symmetry breaking at the normal nuclear density. Recent experiments at GSI on Sn isotopes yielded the first quantitative estimation of its reduction to be about 33% compared to that in the vacuum [1].
We are working on a new experimental project, namely...
Dr
Daisuke Jido
(Kyoto University)
6/16/11, 4:30 PM
Hadrons in Hot and Cold Medium
talk
I would like to discuss pseudoscalar mesons, especially pion, in a context of partial restoration of chiral symmetry in nuclear medium. First of all, I show a general relation between the in-medium quark condensate and hadronic quantities in nuclear medium. With this relation, we can confirm that partial restoration of chiral symmetry takes place in nuclei based on experimental observations of...
Prof.
Satoru Hirenzaki
(Nara Women's University)
6/16/11, 4:50 PM
Hadrons in Hot and Cold Medium
talk
The study of the spontaneous breaking of chiral symmetry and its partial restoration at finite density based on the studies of the Mesic Atoms and Mesic Nuclei is one of the important branch of modern Hadron Nuclear Physics [1,2]. We try to proceed this research field to investigate the U_A(1) anomaly effects in the nuclear medium by
studying the eta'(958) Mesic nuclei. The present...
Dr
Alessandro Feliciello
(INFN - Sezione di Torino)
6/16/11, 5:10 PM
Hadrons in Hot and Cold Medium
talk
The SuperB factory, whose construction was recently approved by the Italian government, is an asymmetric heavy flavour factory where e+, e- beams will collide with a peak luminosity in excess of 10^36 cm-2 s-1 at the Y(4S) resonance c.m. energy. The Y(4S) then decays in BBbar meson pair with a B.R. > 96%, thus allowing, among other topics, a systematic study of B-meson decays.
While for...
Dr
Michaela Thiel
(II. Physikalisches Institut, JLU Giessen)
6/16/11, 5:30 PM
Hadrons in Hot and Cold Medium
talk
Using the CrystalBall/TAPS photon spectrometer at MAMI Mainz the omega photoproduction off nuclei (C, Nb) and off the proton (LH2) were studied via the hadronic decay channel
gamma + A -> omega + X -> pi0 gamma + X. The aim of this work is to investigate whether the properties of the omega meson are modified within normal nuclear matter. Two different experimental approaches have been used:...
Dr
Takayasu Sekihara
(Tokyo Institute of Technology)
6/16/11, 5:50 PM
Hadrons in Hot and Cold Medium
talk
The internal structure of the resonant Lambda(1405) state is
investigated based on meson-baryon coupled-channels chiral dynamics,
by evaluating density distributions obtained from form factors of
the Lambda(1405) state. The form factors and the density distributions
are defined as an extension of the ordinary stable particles and
are directly evaluated from the meson-baryon scattering...
Germano Bonomi
(University of Brescia and INFN Pavia)
6/17/11, 9:00 AM
Hadrons in Hot and Cold Medium
talk
The creation of a hypernucleus requires the injection of strangeness into the nucleus. This is possible in different ways, mainly using a π+ or a K− beam on fixed targets. A complete review of hypernuclei production by K- at rest will be presented. When a K- stops inside a nucleus it can undergo the so called "strangeness-exchange reaction", in which a neutron is replaced by a Lambda with the...
Dr
Hiroyuki Fujioka
(Kyoto University)
6/17/11, 9:25 AM
Hadrons in Hot and Cold Medium
talk
A pseudoscalar meson may be bound in a nucleus, if the interaction between the meson and the nucleon is attractive enough. In particular, the possible existence of kaonic nuclei attracts both experimentalists and theorists in these days. Two experimental groups, FINUDA and DISTO, claim the observation of K-pp bound states in different reactions, although hot debate with regard to the existence...
Michael Weber
(University of Houston, Texas, USA)
6/17/11, 9:50 AM
Hadrons in Hot and Cold Medium
talk
Recently the HADES collaboration has extended its physics program from heavy ion collisions to proton induced reactions in order to investigate cold nuclear matter effects. Therefore we did two experiments, p+p and p+Nb, focusing on the modification of the spectral function in the rho/omega meson invariant mass region.
Compared to previous measurements the high acceptance of the HADES...
Mr
Kirill Lapidus
(Excellence Cluster "Universe")
6/17/11, 10:10 AM
Hadrons in Hot and Cold Medium
talk
Kaon interaction with baryonic matter is characterized by a repulsive potential according to common belief.
However, the values of the measured potential are not yet consistent with each other.
We analyze the kaon in-medium behavior employing $K^{0}_{S}$'s identified with the HADES detector in p+p and p+Nb collisions at 3.5 GeV kinetic beam energy. The comparison of the $K^{0}_{S}$...
