Pole position of measured in reactions

Aikawa, Shu*; Hashimoto, Tadashi ; Tanida, Kiyoshi ; 73 of others*

We measured a set of , , and invariant mass spectra below and above the mass threshold in -induced reactions on deuteron. We deduced the -wave and scattering amplitudes in the isospin 0 channel in the framework of a and coupled channel. We find that a resonance pole corresponding to is located at 1417.7 $^{+6.0}_{-7.4}$ (fitting errors) $^{+1.1}_{-1.0}$ (systematic errors) + $[-26.1^{+6.0}_{-7.9}$ (fitting errors) $^{+1.7}_{-2.0}$ (systematic errors)] MeV/, closer to the mass threshold than the value determined by the Particle Data Group.

Language	:	English
Journal	:	Physics Letters B
Volume	:	837
Number	:
Pages	:	p.137637_1 - 137637_8
Publication Year/Month	:	2023/02
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Paper URL	:	https://doi.org/10.1016/j.physletb.2022.137637
DOI for research data	:
Keywords	:	Lambda-1405 Baryons; Kaon-nucleon Interactions; J-PARC
Research Facility	:	J-PARC原子核素粒子実験施設
Press Release	:	K中間子と陽子が織りなす風変わりなバリオンを測定; Λ(1405)ハイペロンの複素質量の直接測定に成功
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Registration No. : AA20220844
JAEA Abstracts No. : 51000325
Paper Submission No. : 26290

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