open access

https://hdl.handle.net/2115/86573

Extended optimal Fermi averaging for near-recoilless production in the (K−, π−) reaction on nuclei

英語

2022

American Physical Society (APS)

Physical Review C

105(6)

64606

We propose to extend the optimal Fermi averaging procedure theoretically in order to calculate an in-medium K-n→π-Λ amplitude for the exothermic (K−, π−) reaction on nuclei in the framework of a distorted-wave impulse approximation, taking into account the local momentum transfer generated by semiclassical distorted waves for K− and π− mesons. Angular distributions for the 12C(K-, π−)λ12 C reaction in which a momentum transfer is q < 80 MeV/c at pK = 800 MeV/c in the π− forward direction are estimated by applying the extended procedure. The result shows that the calculated angular distributions are in good agreement with those of the data, and this extension is a successful prescription making it possible to describe the reaction cross sections in near-recoilless reactions such as (K-, π−) in our framework.

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©2022 American Physical Society

2469-9985