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Yamaga, Takumi*; Hashimoto, Tadashi; Tanida, Kiyoshi; 66 of others*
Physical Review C, 102(4), p.044002_1 - 044002_14, 2020/10
Times Cited Count:21 Percentile:87.95(Physics, Nuclear)Yamaga, Takumi*; Hashimoto, Tadashi; Tanida, Kiyoshi; 66 of others*
JPS Conference Proceedings (Internet), 26, p.023008_1 - 023008_6, 2019/11
Yamaga, Takumi*; Tanida, Kiyoshi; 74 of others*
AIP Conference Proceedings 1735, p.040007_1 - 040007_6, 2016/05
Times Cited Count:0 Percentile:0.00(Physics, Nuclear)Yamaga, Takumi*; Tanida, Kiyoshi; J-PARC E31 Collaboration*; 70 of others*
JPS Conference Proceedings (Internet), 8, p.021016_1 - 021016_5, 2015/09
Nanamura, Takuya; Hashimoto, Tadashi; Sakuma, Fuminori*; Yamaga, Takumi*; Iwasaki, Masahiko*
no journal, ,
Bound states caused by attractive interaction, such as
and kaonic nuclei, are interesting systems with strangeness. Many experimental attempts have tried to establish an existence of the lightest kaonic nuclei, "
". However, no clear conclusion was reached. Recently, J-PARC E15 collaboration searched for "
", using the in-flight
He reaction with an exclusive analysis of the
final state. By reconstructing not only the
invariant-mass but also momentum transfer to the
system, they definitely showed event concentration interpreted as "
" bound state. Moreover, small spatial size of "
" is implied. In order to expand this successful experimental method to heavier kaonic nuclei, such as
, and detailed study for fundamental properties of the
state, we are developing a new magnetic spectrometer. Because an exclusive analysis requires detections of decay particles from the kaonic nuclei as many as possible, the new spectrometer will have larger solid angle of 93%. To realize it, superconducting solenoid magnet and some detectors, a cylindrical drift chamber and charged particle/neutron counters, are 3-4 meters long. Detection efficiencies for neutron would be improved at least 1.7 times better than current spectrometer. In this presentation, I will talk about designs and development status of the new large acceptance spectrometer.