Slope parameters determined from CREX and PREX2 (published in Results in Physics)

2022/10/07 by Shingo Tagami, Tagami, Shingo, T. Wakasa +3 · 4 citations
Medicine · Physics and Astronomy · #Medical Imaging Techniques and Applications #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2210.03313

Abstract

[Background] Very lately, the CREX group presents a skin value ΔR_{\rm skin}⁴⁸(\rm CREX) =0.121 ± 0.026 \rm (exp) ± 0.024 \rm (model)=0.071∼ 0.171~fm. Meanwhile, the PREX group reported a skin value ΔR_{\rm skin}²⁰⁸(\rm PREX2) = 0.283± 0.071=0.212 ∼ 0.354~fm. In our previous paper, we determined both the L--ΔR_{\rm skin}⁴⁸ relation and the L--ΔR_{\rm skin}²⁰⁸ one, using 206 EoSs, where L is a slope parameter. [Purpose] We determine L from ΔR_{\rm skin}⁴⁸(\rm CREX) and ΔR_{\rm skin}²⁰⁸(\rm PREX2) , using 207 EoSs. [Results] The ΔR_{\rm skin}⁴⁸(\rm CREX) yields L(\rm CREX)=0 ∼ 51~MeV and the ΔR_{\rm skin}²⁰⁸(\rm PREX2) does L(\rm PREX2)=76 ∼ 165~MeV. [Conclusion] There is no overlap between L(\rm CREX) and L(\rm PREX2). This is a big problem to be solved.

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