Production of a He4Λ hypernucleus in the 4He(π ,K ) reactions reexamined
Abstract
We investigate theoretically production cross sections of the Jπ=0+ ground state of a He4Λ hypernucleus in the 4He(π , K ) reaction with a distorted-wave impulse approximation using the optimal Fermi-averaged π N →K Λ t matrix. We demonstrate the sensitivity of the production cross sections to the Λ wave functions obtained from 3 N -Λ potentials and to meson distorted waves in eikonal distortions. It is shown that the calculated laboratory cross sections of the 0+ ground state in He4Λ amount to (dσ /d Ω ) lab≃11 μ b /sr at pπ=1.05 GeV /c in the K forward direction because of an advantage of the use of an s -shell target nucleus such as 4He. The importance of the recoil effects and the energy dependence of the π N →K Λ cross sections is also discussed.
- Publication:
-
Physical Review C
- Pub Date:
- August 2019
- DOI:
- 10.1103/PhysRevC.100.024605
- arXiv:
- arXiv:1905.01809
- Bibcode:
- 2019PhRvC.100b4605H
- Keywords:
-
- Nuclear Theory
- E-Print:
- 26 page, 8 figures, 4 Tables