Bounds on neutrino-scalar nonstandard interactions from big bang nucleosynthesis

被引：29
作者：
Venzor, Jorge [1 ]
Perez-Lorenzana, Abdel [1 ]
De-Santiago, Josue [2 ]
机构：
[1] IPN, Dept Fis, Ctr Invest & Estudios Avanzados, Apartado Postal 14-740, Ciudad De Mexico 07000, Mexico
[2] Consejo Nacl Ciencia & Technol, Ave Insurgentes Sur 1582, Ciudad De Mexico 03940, Mexico
来源：
PHYSICAL REVIEW D | 2021年 / 103卷 / 04期
关键词：
OSCILLATIONS; NUMBER;
D O I：
10.1103/PhysRevD.103.043534
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Coherent forward scattering processes by neutrino-scalar nonstandard interactions (SNSI) induce an effective neutrino mass. In the early Universe, a large neutrino effective mass restricts the production of neutrinos. The SNSI effect is modulated by two effective couplings; these account for the coupling between neutrinos and electrons or positrons, G(eff), and the neutrino self-interaction G(S). These parameters are directly related to the effective number of relativistic species, and nonzero values imply a smaller than expected N-eff. We employ big bang nucleosynthesis to constraint the SNSI effect. We find that G(eff) < 1.2 MeV-2 and G(S) <2.0 x 10(7) MeV-2 at 68% C.L. For a scalar mass in the range 10(-15 )eV less than or similar to m(phi) less than or similar to 10(-5) eV, our neutrino-scalar coupling constraint is more restrictive than any previous result.
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