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Ashikaga, Sakiko; Naruki, Megumi*; Hasegawa, Shoichi
no journal, ,
The spontaneous chiral symmetry breaking in QCD vacuum is thought to be an origin of hadron mass. The chiral symmetry is considered to be restored in hot/dense matter. The J-PARC E16 experiment aim to study the mechanism by measuring the mass spectrum of 
meson in nuclear medium. In our experiment, mesons are produced on nuclear target with the high momentum proton beam at the high-p beam line, which is under construction at the J-PARC Hadron Facility. We will measure electron pairs from the meson decay by using the E16 spectrometer. Lead glass calorimeter is a key device for identification of the electron pairs. We did a test experiment with hadron beam in spring 2017. In this presentation, the result of the test experiment and the performance evaluation of lead glass calorimeter will be explained.
Sako, Hiroyuki; Ekawa, Hiroyuki
no journal, ,
no abstracts in English
Hayakawa, Shuhei; Sato, Susumu
no journal, ,
no abstracts in English
Kitamura, Ryo*; Otani, Masashi*; Kondo, Yasuhiro; Bae, S.*; Fukao, Yoshinori*; Hasegawa, Kazuo; Iinuma, Hiromi*; Ishida, Katsuhiko*; Kawamura, Naritoshi*; Kim, B.*; et al.
no journal, ,
Muon acceleration is an important technique in exploring the new frontier of physics. A new measurement of the muon dipole moments is planned in J-PARC using the muon linear accelerator. The low-energy (LE) muon source using the thin metal foil target and beam diagnostic system were developed for the world's first muon acceleration. Negative muonium ions from the thin metal foil target as the LE muon source was successfully observed. Also the beam profile of the LE positive muon was measured by the LE-dedicated beam profile monitor. The muon acceleration test using a Radio-Frequency Quadrupole linac (RFQ) is being prepared as the first step of the muon accelerator development. In this paper, the latest status of the muon source for this muon acceleration test is described.
Otani, Masashi*; Bae, S.*; Fukao, Yoshinori*; Hasegawa, Kazuo; Iinuma, Hiromi*; Ishida, Katsuhiko*; Kawamura, Naritoshi*; Kim, B.*; Kitamura, Ryo*; Kondo, Yasuhiro; et al.
no journal, ,
Muon acceleration is an important technique in exploring the new frontier of physics. A new measurement of the muon dipole moments is planned in J-PARC using the muon linear accelerator. The low-energy (LE) muon source using the thin metal foil target and beam diagnostic system were developed for the world's first muon acceleration. Negative muonium ions from the thin metal foil target as the LE muon source was successfully observed. Also the beam profile of the LE positive muon was measured by the LE-dedicated beam profile monitor. The muon acceleration test using a Radio-Frequency Quadrupole linac (RFQ) is being prepared as the first step of the muon accelerator development. In this paper, the latest status of the first muon acceleration test is described.
dibaryon system bound in a meson exchange model?Sekihara, Takayasu; Kamiya, Yuki*; Hyodo, Tetsuo*
no journal, ,
Recently, the HAL QCD simulation pointed out that the interaction is strongly attractive enough to generate a bound state with spin/parity 
. In this talk, we investigate the origin of the attraction of the interaction by constructing a meson exchange model. Between 
and 
, 
and scalar-isoscalar ("
") mesons can be exchanged. The couplings between the meson and baryons are fixed by the effective Lagrangian based on flavor symmetry. For the "" exchange, on the other hand, we employ the correlated two meson exchange developed in the study of the nuclear force. We discuss whether the interaction is attractive or not and whether the attraction is strong enough to generate the bound state or not.
Yoshida, Junya; Ohashi, Masaki*; Goto, Ryosuke*; Nagase, Yuichi*; Murai, Rina*; May, S.*; Aye, M. M. T.*; Kimbara, Shinji*; Yoshimoto, Masahiro*; Nakazawa, Kazuma*
no journal, ,
J-PARC E07 collaboration has been performed K- beam exposure to all the emulsion sheet detector. The analysis for double strangeness nuclei is ongoing. We'll discuss the current status, performance, speed, and future prospects.