Observation of the $^7_\Lambda$He Hypernucleus by the ($e, e′K^+$) Reaction - INSPIRE

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Observation of the $^7_\Lambda$ He Hypernucleus by the ( $e, e′K^+$ ) Reaction

HKS (JLab E01-011)

Collaboration

•

S.N. Nakamura
(
- Tohoku U.
)

Jul, 2012

5 pages

Published in:

Phys.Rev.Lett. 110 (2013) 1, 012502

Published: Jan 2, 2013

e-Print:

1207.0571 [nucl-ex]

DOI:

10.1103/PhysRevLett.110.012502

Report number:

JLAB-PHY-12-1598

View in:

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Abstract: (APS)

An experiment with a newly developed high-resolution kaon spectrometer and a scattered electron spectrometer with a novel configuration was performed in Hall C at Jefferson Lab. The ground state of a neutron-rich hypernucleus, HeΛ7, was observed for the first time with the (e, e′K+) reaction with an energy resolution of ∼0.6 MeV. This resolution is the best reported to date for hypernuclear reaction spectroscopy. The HeΛ7 binding energy supplies the last missing information of the A=7, T=1 hypernuclear isotriplet, providing a new input for the charge symmetry breaking effect of the ΛN potential.

Note:

5 pages, 4 figures, submitted to PRL

21.80.+a
25.30.Rw
21.60.Gx
13.75.Ev
Lambda: hypernucleus
Lambda: binding energy
charge: symmetry breaking
K
magnetic spectrometer
Jefferson Lab

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