학술논문
Spectroscopic study of a possible Λnn resonance and a pair of ΣNN states using the (e,e′K+) reaction with a tritium target
Document Type
article
Author
Pandey, B; Tang, L; Gogami, T; Suzuki, KN; Itabashi, K; Nagao, S; Okuyama, K; Nakamura, SN; Abrams, D; Afnan, IR; Akiyama, T; Androic, D; Aniol, K; Averett, T; Gayoso, C Ayerbe; Bane, J; Barcus, S; Barrow, J; Bellini, V; Bhatt, H; Bhetuwal, D; Biswas, D; Camsonne, A; Castellanos, J; Chen, J-P; Chen, J; Covrig, S; Chrisman, D; Cruz-Torres, R; Das, R; Fuchey, E; Gal, C; Gibson, BF; Gnanvo, K; Garibaldi, F; Gautam, T; Gomez, J; Gueye, P; Hague, TJ; Hansen, O; Henry, W; Hauenstein, F; Higinbotham, DW; Hyde, C; Kaneta, M; Keppel, C; Kutz, T; Lashley-Colthirst, N; Li, S; Liu, H; Mammei, J; Markowitz, P; McClellan, RE; Meddi, F; Meekins, D; Michaels, R; Mihovilovič, M; Moyer, A; Nguyen, D; Nycz, M; Owen, V; Palatchi, C; Park, S; Petkovic, T; Premathilake, S; Reimer, PE; Reinhold, J; Riordan, S; Rodriguez, V; Samanta, C; Santiesteban, SN; Sawatzky, B; Širca, S; Slifer, K; Su, T; Tian, Y; Toyama, Y; Uehara, K; Urciuoli, GM; Votaw, D; Williamson, J; Wojtsekhowski, B; Wood, S; Yale, B; Ye, Z; Zhang, J; Zheng, X
Source
Physical Review C. 105(5)
Subject
Language
Abstract
A mass spectroscopy experiment with a pair of nearly identical high-resolution spectrometers and a tritium target was performed in Hall A at Jefferson Lab. Utilizing the (e,e′K+) reaction, enhancements, which may correspond to a possible Λnn resonance and a pair of ςNN states, were observed with an energy resolution of about 1.21 MeV (σ), although greater statistics are needed to make definitive identifications. An experimentally measured Λnn state may provide a unique constraint in determining the Λn interaction, for which no scattering data exist. In addition, although bound A=3 and 4 ς hypernuclei have been predicted, only an A=4 ς hypernucleus (Heς4) was found, utilizing the (K-,π-) reaction on a He4 target. The possible bound ςNN state is likely a ς0nn state, although this has to be confirmed by future experiments.