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arXiv 2106.04474nucl-thastro-ph.HEhep-ph
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PREX -2数据对致密物质中电子中微子不透明度的影响

Implications of PREX--2 data on the electron--neutrino opacity in dense matter

Parada T. P. Hutauruk

摘要:

受最近由PREX-2数据测量出的${}^{208}$ Pb的中子分布半径的启发,本文利用扩展的相对论平均场(E-RMF)模型,研究了PREX-2数据约束下的新的G3(M)参数对稠密物质中电子-中微子散射的影响。我采用G3(M)参数集来描述核物质。所得到的G3(M)参数组的状态方程与实验数据和用N $^3$ LO 3 N力的手征有效场论计算结果符合得很好。本文分析了电子-中微子微分截面和电子-中微子平均自由程对G3(M)参数集的敏感性。发现在不同重子密度下的电子-中微子微分截面比在TM_(1 e)和FSU石榴石参数组下的电子-中微子微分截面高。较高的截面减小了电子-中微子平均自由程。

英文摘要:

Motivated by the recent measurement of the neutron distribution radius of ${}^{208}$Pb from the PREX--2 data, I study the effects of the new G3(M) parameter set constrained by PREX--2 data on the electron--neutrino scattering in dense matter using the extended relativistic mean field (E--RMF) model. I employ the G3(M) parameter set to describe the nuclear matter. The obtained equation of state for the G3(M) parameter set has an excellent agreement with experimental data and the chiral effective field theory calculation with N$^3$LO 3N forces. I analyze both differential cross section of electron--neutrino and electron--neutrino mean free path to observe their sensitivity to the G3(M) parameter set. One finds that the differential cross sections of electron--neutrino for different baryon densities have higher values compared with that obtained for the TM1e and FSU Garnet parameter sets. The higher cross section decreases the electron--neutrino mean free path.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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