Abstract
H-dibaryon has been predicted as a stable 6-quark color-singlet state. It has been searched for by many experiments but has never been discovered. Recent lattice QCD calculations predict H-dibaryon as a weakly bound or a resonant state close to the LL threshold. E224 and E522 experiments at KEK observed peaks in LL invariant mass spectra near the threshold in (K -, K +) reactions, which were statistically not significant. Therefore, we proposed a new experiment E42 at J-PARC. It will measure decay products of ΛΛ and Λπ -p in a (K -, K +) reaction. We design a large acceptance spectrometer based on a Time Projection Chamber (TPC) immersed in a dipole magnetic field. The TPC surrounds a target to cover nearly 4π acceptance, and accepts K - beams up to 10 6 counts per second. To suppress drift field distortion at high beam rates, we adopt Gas Electron Multipliers (GEMs) for electron amplification and a gating grid. We show an overview of the experiment, the design of the spectrometer, and the R&D status of the TPC prototype.
| Original language | English |
|---|---|
| Title of host publication | EPJ Web of Conferences |
| Volume | 66 |
| DOIs | |
| Publication status | Published - 2014 |
| Externally published | Yes |
| Event | 2013 International Nuclear Physics Conference, INPC 2013 - Firenze, Italy Duration: 2013 Jun 2 → 2013 Jun 7 |
Other
| Other | 2013 International Nuclear Physics Conference, INPC 2013 |
|---|---|
| Country | Italy |
| City | Firenze |
| Period | 13/6/2 → 13/6/7 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Search for H-dibaryon at J-PARC with a Large Acceptance TPC. / Sako, H.; Ahn, Jung Keun; Baek, K. Y.; Bassalleck, B.; Fujioka, H.; Guo, L.; Hasegawa, S.; Hicks, K.; Honda, R.; Hwang, S. H.; Ichikawa, Y.; Ieiri, M.; Imai, K.; Kim, S. H.; Kiuchi, R.; Lee, H. S.; Nakazawa, K.; Naruki, M.; Ni, A.; Niiyama, M.; Ozawa, K.; Park, J. Y.; Park, S. H.; Ryu, S. Y.; Sato, S.; Shirotori, K.; Sugimura, H.; Sumihara, M.; Tanida, K.; Takahashi, H.; Takahashi, T.
EPJ Web of Conferences. Vol. 66 2014. 09015.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Search for H-dibaryon at J-PARC with a Large Acceptance TPC
AU - Sako, H.
AU - Ahn, Jung Keun
AU - Baek, K. Y.
AU - Bassalleck, B.
AU - Fujioka, H.
AU - Guo, L.
AU - Hasegawa, S.
AU - Hicks, K.
AU - Honda, R.
AU - Hwang, S. H.
AU - Ichikawa, Y.
AU - Ieiri, M.
AU - Imai, K.
AU - Kim, S. H.
AU - Kiuchi, R.
AU - Lee, H. S.
AU - Nakazawa, K.
AU - Naruki, M.
AU - Ni, A.
AU - Niiyama, M.
AU - Ozawa, K.
AU - Park, J. Y.
AU - Park, S. H.
AU - Ryu, S. Y.
AU - Sato, S.
AU - Shirotori, K.
AU - Sugimura, H.
AU - Sumihara, M.
AU - Tanida, K.
AU - Takahashi, H.
AU - Takahashi, T.
PY - 2014
Y1 - 2014
N2 - H-dibaryon has been predicted as a stable 6-quark color-singlet state. It has been searched for by many experiments but has never been discovered. Recent lattice QCD calculations predict H-dibaryon as a weakly bound or a resonant state close to the LL threshold. E224 and E522 experiments at KEK observed peaks in LL invariant mass spectra near the threshold in (K -, K +) reactions, which were statistically not significant. Therefore, we proposed a new experiment E42 at J-PARC. It will measure decay products of ΛΛ and Λπ -p in a (K -, K +) reaction. We design a large acceptance spectrometer based on a Time Projection Chamber (TPC) immersed in a dipole magnetic field. The TPC surrounds a target to cover nearly 4π acceptance, and accepts K - beams up to 10 6 counts per second. To suppress drift field distortion at high beam rates, we adopt Gas Electron Multipliers (GEMs) for electron amplification and a gating grid. We show an overview of the experiment, the design of the spectrometer, and the R&D status of the TPC prototype.
AB - H-dibaryon has been predicted as a stable 6-quark color-singlet state. It has been searched for by many experiments but has never been discovered. Recent lattice QCD calculations predict H-dibaryon as a weakly bound or a resonant state close to the LL threshold. E224 and E522 experiments at KEK observed peaks in LL invariant mass spectra near the threshold in (K -, K +) reactions, which were statistically not significant. Therefore, we proposed a new experiment E42 at J-PARC. It will measure decay products of ΛΛ and Λπ -p in a (K -, K +) reaction. We design a large acceptance spectrometer based on a Time Projection Chamber (TPC) immersed in a dipole magnetic field. The TPC surrounds a target to cover nearly 4π acceptance, and accepts K - beams up to 10 6 counts per second. To suppress drift field distortion at high beam rates, we adopt Gas Electron Multipliers (GEMs) for electron amplification and a gating grid. We show an overview of the experiment, the design of the spectrometer, and the R&D status of the TPC prototype.
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U2 - 10.1051/epjconf/20146609015
DO - 10.1051/epjconf/20146609015
M3 - Conference contribution
AN - SCOPUS:84898768568
VL - 66
BT - EPJ Web of Conferences
ER -