JPS Conf. Proc. 33, 011103 (2021) [9 pages]
Proceedings of the 3rd J-PARC Symposium (J-PARC2019)
Time Projection Chamber “HypTPC” for the Hadron Spectroscopy at J-PARC
1ASRC, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
2Department of Physics, Korea University, Seoul 136-713, Republic of Korea
3Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
4Department of Physics, Kyoto University, Kyoto 606-8502, Japan
5Ohio University, Athens, Ohio 45701, U.S.A.
6RIKEN, Wako, Saitama 351-0198, Japan
7High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
8Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
9Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan
Received November 29, 2019

A Time Projection Chamber, called as “HypTPC”, is the central tracker of Hyperon Spectrometer (HS). The HypTPC measures the trajectory of charged particles in three dimension with high precision of about 300 µm. We can achieve a good momentum resolution of \(\Delta p/p \sim 2.4\)% for proton and 1.4% for \(\pi ^{ \pm }\) in \(\sigma \). The HypTPC has a large acceptance because an experimental target will be installed inside the TPC volume. By using this powerful detector, we propose three experiments at J-PARC to search for the new hadronic states. The E42 experiment aims to search for H-dibaryon, which is composed of uuddss quarks with (isospin) I = (spin) J = 0. The E45 is baryon spectroscopy experiment and we can confirm the N* and \(\Delta ^{*}\) baryons. The E72 experiment searches for a narrow \(\Lambda \) resonance using \(p(K^{ - },\eta )\) reaction. The HypTPC will open up the new possibility of hadron physics.

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