14th International Conference on Hypernuclear and Strange Particle Physics - HYP2022

Analysis Result of E12-17-003 Experiment

29 Jun 2022, 17:30

15m

online

online talk 3; Wed-IVb

Speaker

Bishnu Pandey (Hampton University)

Description

The E12-17-003 Experiment was carried out successfully at Jefferson lab in 2018 using a pressurized tritium target. By utilizing the Hall A high-resolution spectrometers and the ${}^{3}H(e,e^{\prime }{K}^{+})\Lambda nn$ reaction, enhancements which may correspond to the possible $\Lambda nn$ resonance and a pair of $\Sigma NN$ sate were observed with an energy resolution of 1.21 MeV (σ), although the greater statistics are required to make the definite identifications. The experimentally measured $\Lambda nn$ state can provide unique constraints in determining the $\Lambda n$ interaction for which no scattering data exist. In addition, although bound A = 3 and 4 $\Sigma$ hypernuclei have been predicted, only an A = 4 $\Sigma$ hypernucleus (${}_{\mathrm{\Sigma }}^{4}He$) was experimentally observed using the $(K^{-},{\pi }^{-})$ reaction on a ${}^4$He target. The bound $\Sigma NN$ state is possibly a ${\Sigma }^{0}nn$ state, although this has to be confirmed by future experiments. This presentation will give a description of this experiment, its analysis, and its results.

Bishnu Pandey on behalf of Jefferson Lab hypernuclear collaboration.

Presentation materials

Bishnu_HYP2022.pdf