ELPH研究会C035「実験、反応・構造計算、格子QCD で解き明かすハドロン分光」

Production of S=-2 systems near the threshold in the 12C(K−,K+)X reaction at 1.8 GeV/c

Nov 9, 2023, 2:20 PM

30m

　三神峯ホール (東北大学電子光理学研究センター)

ハイパー核

Speaker

Jung Wooseung (Korea University)

Description

While studying the double $\mathrm{\Lambda }$ hypernuclei and ${\mathrm{\Xi }}^{-}$ hypernuclei is essential in further understanding baryon-baryon interaction with S=-2 systems, experimental data still need to be provided. Several earlier experiments, such as KEK-PS E373 and J-PARC E07, reported possible attractive $\mathrm{\Xi }$–nucleus interaction from bound ${\mathrm{\Xi }}^{-}$ hypernuclear states.
Recently, the E42 experiment which has a primary goal to search for an H-dibaryon collected 300K ${}^{12}C(K^{-},K^{+})X$ reaction events in the ranges of ${\theta }_{K+}<{25}^{\circ }$ and $p_{K^{+}}>$ 0.5 GeV/$\mathit{c}$ via 1.8 GeV/$\mathit{c}$ $K^{-}$ beam at the J-PARC. A large time-projection chamber (HypTPC) highlights the E42 detector, facilitating a charged particle reconstruction for subsequent decays of the double-strangeness system produced near the threshold region in the ${}^{12}C(K^{-},K^{+})X$ reaction. Therefore, the E42 data would first measure all decay channels involving charged particle emission from ${}^{12}C(K^{-},K^{+})X$ reaction with high statistics.
This talk will present the preliminary results of the J-PARC E42 experiment.

Presentation materials

202311_E42_WooseungJung_ELPHC035.pdf