Journal
PHYSICAL REVIEW C
Volume 94, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.94.021302
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Funding
- JSPS KAKENHI [12002001, 15684005, 16GS0201, 24.4123]
- JSPS Core-to-Core Program [21002]
- JSPS Strategic Young Researcher Overseas Visits Program for Accelerating Brain Circulation [R2201]
- U.S. Department of Energy [DE-AC05-84ER40150, DE-AC05-06OR23177, DE-FG02-99ER41065, DE-FG02-97ER41047, DE-AC02-06CH11357, DE-FG02-00ER41110, DE-AC02-98CH10886]
- U.S.-NSF [013815, 0758095]
- Grants-in-Aid for Scientific Research [24105003, 12002001] Funding Source: KAKEN
- U.S. Department of Energy (DOE) [DE-FG02-99ER41065, DE-FG02-97ER41047] Funding Source: U.S. Department of Energy (DOE)
- Direct For Mathematical & Physical Scien
- Division Of Physics [1506172, 1206043, 1306418, 0758095, 1306227] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [1506303] Funding Source: National Science Foundation
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The missing mass spectroscopy of the He-7(Lambda) hypernucleus was performed using the Li-7(e, e' K+)(Lambda)He-7 reaction at the Thomas Jefferson National Accelerator Facility Hall C. The Lambda-binding energy of the ground-state (1/2(+)) was determined with a smaller error than that of the previous measurement, being B-Lambda = 5.55 +/- 0.10(stat.) +/- 0.11(sys.) MeV. The experiment also provided new insight into charge symmetry breaking in p-shell hypernuclear systems. Finally, a peak at B Lambda = 3.65 +/- 0.20(stat.) +/- 0.11(sys.) MeV was observed and assigned as a mixture of 3/2(+) and 5/2(+) states, confirming the gluelike behavior of Lambda, which makes an unstable state in He-6 stable against neutron emission.
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