Cross-section measurement of virtual photoproduction of iso-triplet three-body hypernucleus, $\Lambda$nn - INSPIRE

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Cross-section measurement of virtual photoproduction of iso-triplet three-body hypernucleus, $\Lambda$ nn

T. Gogami
(
- Kyoto U.
)
,
K.N. Suzuki
(
- Kyoto U.
)
,
B. Pandey
(
- Hampton U. and
- Jefferson Lab
)
,
K. Itabashi
(
- Tohoku U.
)
,
S. Nagao
(
- Tohoku U.
)

2022

6 pages

Published in:

EPJ Web Conf. 271 (2022) 02002

Contribution to:

- HYP 2022

Published: 2022

DOI:

10.1051/epjconf/202227102002

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Abstract: (EDP Sciences)

Missing-mass spectroscopy with the 3H(e, e′K+) reaction was carried out at Jefferson Lab’s (JLab) Hall A in Oct–Nov, 2018. The differential cross section for the 3H(γ∗, K+)Λnn was deduced at ω = Ee − Ee′ = 2.102 GeV and at the forward K+-scattering angle (0° ≤ θγ∗K ≤ 5°) in the laboratory frame. Given typical predicted energies and decay widths, which are (BΛ, Γ) = (−0.25, 0.8) and (−0.55, 4.7) MeV, the cross sections were found to be 11.2 ± 4.8(stat.)+4.1−2.1(sys.) and 18.1 ± 6.8(stat.)+4.2−2.9(sys.) nb/sr, respectively. The obtained result would impose a constraint for interaction models particularly between Λ and neutron by comparing to theoretical calculations.

interaction: model
tritium: target
mass: calibration
Jefferson Lab
nucleon hyperon: interaction
photoproduction
mass spectrum: missing-mass
differential cross section
Lambda: hypernucleus

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