Year: 2003
Type: preprint
Abstract: We measured the neutron time-of-flight spectrum in the ^4He(stopped K^-, n) reaction by stopping negative kaons in a superfluid helium target. A clear enhancement was observed in the neutron spectrum, which indicates the formation of a strange tribaryon of charge +1 with a mass and width of M = 3141 +/- 3 (stat.) +4/-1 (sys.) MeV/c^2 and G < 23 MeV/c^2. This state, denoted as S^+(3140), is about 25 MeV/c^2 higher than the previously observed S^0(3115) T=1.
Source: arXiv (Cornell University)
Authors: Iwasaki, M., Suzuki, T., Bhang, H., Franklin, G., Gomikawa, K., Hayano, R. S., Hayashi, T., Ishikawa, K., Ishimoto, S., Itahashi, K., Katayama, T., Kondo, Y., Matsuda, Y., Nakamura, T., Okada, S., Outa, H., Quinn, B., Sato, M., Shindo, M., So, H., Sugimoto, T., Strasser, P., Suzuki, K., Suzuki, S., Tomono, D., Vinodkumar, A. M., Widmann, E., Yamazaki, T., Yoneyama, T.
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1752887010