Boson mixing and flavor vacuum in the expanding Universe: A possible candidate for the dark energy

被引：13

作者：

Capolupo, Antonio

Quaranta, Aniello ^{[1
]}

机构：

[1] Univ Salerno, Dipartimento Fis ER Caianiello, Fisciano, SA, Italy

来源：

PHYSICS LETTERS B | 2023年 / 840卷

关键词：

NEUTRINO OSCILLATIONS; COSMOLOGICAL CONSTANT; POWER SPECTRUM; CONSTRAINTS; GALAXIES; GRAVITY;

D O I：

10.1016/j.physletb.2023.137889

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze the boson mixing in curved spacetime and compute the expectation value of the energy-momentum tensor of bosons on the flavor vacuum in spatially flat Friedmann-Lemaitre-Robertson-Walker metrics. We show that the energy-momentum tensor of the flavor vacuum behaves as the effective energy-momentum tensor of a perfect fluid. Assuming a fixed de Sitter background, we show that the equation of state can assume values in the interval [-1,1], and, in the flat space-time limit has a value -1, which is the one of the dark energy. The results here presented show that vacuum of mixed bosons like neutrino super-partners, can represent a possible component of the dark energy of the Universe. (c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.

引用

页数：16

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