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Sugimura, Hitoshi; Sako, Hiroyuki
no journal, ,
We aim to search for the H-dibaryon, which is composed of "uuddss" quarks with I=0, J=0, by using the (
) reaction at J-PARC. The main detector for this experiment is a time projection chamber "HypTPC" as a central tracking device in a superconducting dipole magnet. The HypTPC provides a great tracking capability for decay particles from the H-dibaryon. In order to achive the good momentum resolution with large acceptance, the octagonal prism layout and the triple GEM amplification were chosen. We have tested the performance of HypTPC using positron beam at ELPH, Tohoku University. The position resolution is measured at 0.4 mm in horizontal direction and 0.6 mm in vertical direction, respectively.
Sekihara, Takayasu
no journal, ,
From the scattering amplitude we can extract automatically normalized two-body wave functions for general bound states. Thanks to this fact, we can discuss the internal structure of hadronic molecule candidates in terms of their two-body wave functions from scattering amplitudes.
Hotchi, Hideaki
no journal, ,
J-PARC is a MW-class high-power proton accelerator facility, comprising a chain of three accelerators; linac, RCS and MR. Recently, the linac upgrades were completed. Since then, a full-scale high-intensity beam test has intensively been developed between operational duties for users. The most important issues in realizing a high-power beam operation is minimizing and controlling beam loss to maintain machine activations within a permissible level. This talk presents recent progress of J-PARC accelerator especially focusing our approaches to beam loss issues, including the future beam power ramp-up plan.
Otani, Masashi*; Kawamura, Naritoshi*; Naito, Fujio*; Mibe, Tsutomu*; Yoshida, Mitsuhiro*; Hasegawa, Kazuo; Ito, Takashi; Kondo, Yasuhiro; Hayashizaki, Noriyosu*; Iwashita, Yoshihisa*; et al.
no journal, ,
We are developing a linac dedicated to the muon acceleration. It enables us to measure the muon anomalous magnetic moment with an accuracy of 0.1 ppm and search for electric dipole moment with a sensitivity of 10
cm to explore beyond Standard Model of elementary particle physics. As a first step for demonstration of the muon acceleration, we are developing the source of slow muon with which RFQ acceleration is conducted. This paper describes status of these developments.