Breakdown of Chiral Perturbation Theory for the Axion Hot Dark Matter Bound

被引：28

作者：

Di Luzio, Luca ^{[1
,2
,3
]}

Martinelli, Guido ^{[4
,5
]}

Piazza, Gioacchino ^{[6
,7
]}

机构：

[1] DESY, Notkestr 85, D-22607 Hamburg, Germany

[2] Univ Padua, Dipartimento Fis & Astron G Galilei, Padua, Italy

[3] Ist Nazl Fis Nucl, Sez Padova, Via Francesco Marzolo 8, I-35131 Padua, Italy

[4] Phys Dept, Piazzale Aldo Moro 5, I-00185 Rome, Italy

[5] Ist Nazl Fis Nucl, Sez Roma La Sapienza, Piazzale Aldo Moro 5, I-00185 Rome, Italy

[6] CNRS, IJCLab, IN2P3, Pole Theorie Batiment 210, F-91405 Orsay, France

[7] Univ Paris Saclay, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 126卷 / 24期

关键词：

CP CONSERVATION; SCATTERING; TEMPERATURE; CONSTRAINTS; RESONANCE; STATES;

D O I：

10.1103/PhysRevLett.126.241801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that the commonly adopted hot dark matter bound on the axion mass m(a) less than or similar to 1 eV is not reliable, since it is obtained by extrapolating the chiral expansion in a region where the effective field theory breaks down. This is explicitly shown via the calculation of the axion-pion thermalization rate at the next-to-leading order in chiral perturbation theory. We finally advocate a strategy for a sound extraction of the axion hot dark matter bound via lattice QCD techniques.

引用

页数：6

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