Search for H-dibaryon at J-PARC with a Large Acceptance TPC

H. Sako; J. K. Ahn; K. Y. Baek; B. Bassalleck; H. Fujioka; L. Guo; S. Hasegawa; K. Hicks; R. Honda; S. H. Hwang; Y. Ichikawa; M. Ieiri; K. Imai; S. H. Kim; R. Kiuchi; H. S. Lee; K. Nakazawa; M. Naruki; A. Ni; M. Niiyama; K. Ozawa; J. Y. Park; S. H. Park; S. Y. Ryu; S. Sato; K. Shirotori; H. Sugimura; M. Sumihara; K. Tanida; H. Takahashi; T. Takahashi

doi:10.1051/epjconf/20146609015

Search for H-dibaryon at J-PARC with a Large Acceptance TPC

H. Sako, J. K. Ahn, K. Y. Baek, B. Bassalleck, H. Fujioka, L. Guo, S. Hasegawa, K. Hicks, R. Honda, S. H. Hwang, Y. Ichikawa, M. Ieiri, K. Imai, S. H. Kim, R. Kiuchi, H. S. Lee, K. Nakazawa, M. Naruki, A. Ni, M. NiiyamaK. Ozawa, J. Y. Park, S. H. Park, S. Y. Ryu, S. Sato, K. Shirotori, H. Sugimura, M. Sumihara, K. Tanida, H. Takahashi, T. Takahashi

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

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 10⁶ 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
Article number	09015
Journal	EPJ Web of Conferences
Volume	66
DOIs	https://doi.org/10.1051/epjconf/20146609015
Publication status	Published - 2014
Externally published	Yes
Event	2013 International Nuclear Physics Conference, INPC 2013 - Firenze, Italy Duration: 2013 Jun 2 → 2013 Jun 7

ASJC Scopus subject areas

Physics and Astronomy(all)

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Sako, H., Ahn, J. K., 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., ... Takahashi, T. (2014). Search for H-dibaryon at J-PARC with a Large Acceptance TPC. EPJ Web of Conferences, 66, [09015]. https://doi.org/10.1051/epjconf/20146609015

Sako, H, Ahn, JK, Baek, KY, Bassalleck, B, Fujioka, H, Guo, L, Hasegawa, S, Hicks, K, Honda, R, Hwang, SH, Ichikawa, Y, Ieiri, M, Imai, K, Kim, SH, Kiuchi, R, Lee, HS, Nakazawa, K, Naruki, M, Ni, A, Niiyama, M, Ozawa, K, Park, JY, Park, SH, Ryu, SY, Sato, S, Shirotori, K, Sugimura, H, Sumihara, M, Tanida, K, Takahashi, H & Takahashi, T 2014, 'Search for H-dibaryon at J-PARC with a Large Acceptance TPC', EPJ Web of Conferences, vol. 66, 09015. https://doi.org/10.1051/epjconf/20146609015

@article{ade50b6075da4ad4bc0463e241984cde,

title = "Search for H-dibaryon at J-PARC with a Large Acceptance TPC",

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 106 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.",

author = "H. Sako and Ahn, {J. K.} and Baek, {K. Y.} and B. Bassalleck and H. Fujioka and L. Guo and S. Hasegawa and K. Hicks and R. Honda and Hwang, {S. H.} and Y. Ichikawa and M. Ieiri and K. Imai and Kim, {S. H.} and R. Kiuchi and Lee, {H. S.} and K. Nakazawa and M. Naruki and A. Ni and M. Niiyama and K. Ozawa and Park, {J. Y.} and Park, {S. H.} and Ryu, {S. Y.} and S. Sato and K. Shirotori and H. Sugimura and M. Sumihara and K. Tanida and H. Takahashi and T. Takahashi",

year = "2014",

doi = "10.1051/epjconf/20146609015",

language = "English",

volume = "66",

journal = "EPJ Web of Conferences",

issn = "2101-6275",

publisher = "EDP Sciences",

note = "2013 International Nuclear Physics Conference, INPC 2013 ; Conference date: 02-06-2013 Through 07-06-2013",

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T1 - Search for H-dibaryon at J-PARC with a Large Acceptance TPC

AU - Sako, H.

AU - Ahn, J. K.

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 106 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 106 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.

UR - http://www.scopus.com/inward/record.url?scp=84898768568&partnerID=8YFLogxK

U2 - 10.1051/epjconf/20146609015

DO - 10.1051/epjconf/20146609015

M3 - Conference article

AN - SCOPUS:84898768568

VL - 66

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

SN - 2101-6275

M1 - 09015

T2 - 2013 International Nuclear Physics Conference, INPC 2013

Y2 - 2 June 2013 through 7 June 2013

ER -

Search for H-dibaryon at J-PARC with a Large Acceptance TPC

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