Near-threshold K*(892)+ meson production in the interaction of π-mesons with nuclei

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2020,（11）
• 所属期刊栏目: NUCLEAR PHYSICS
• 页码范围: 168-178
• 页数: 11页
• 语种: 英文
• DOI: 10.1088/1674-1137/abae55

摘要

We study the inclusive production of strange vector K*(892)+mesons in π-A reactions at near-threshold laboratory incident pion momenta of 1.4-2.0 GeV/c via a nuclear spectral function approach.The approach accounts for incoherent primary π-meson-proton π-p → K*(892)+Σ-production processes as well as the influence of the scalar K*(892)+-nucleus potential(or the K*(892)+in-medium mass shift)on these processes.We calculate the ab-solute differential and total cross sections for the production of K*(892)+mesons from carbon and tungsten nuclei at laboratory angles of 0°-45° and at the aforementioned momenta in five scenarios for the aforenoted shift.We show that the K*(892)+momentum distributions and their excitation functions(absolute and relative)possess a high sensit-ivity to changes in the in-medium K*(892)+mass shift in the low-momentum region of 0.1-0.6 GeV/c.Therefore,the measurement of such observables in a dedicated experiment at the GSI pion beam facility in the near-threshold mo-mentum domain will allow us to get valuable information on the K*(892)+in-medium properties.