Work

Gravitational waves induced by spinor fields

Year: 2015

Type: article

Abstract: In realistic model building, spinor fields with various masses are present. During inflation, a spinor field may induce gravitational waves as a second order effect. In this paper, we calculate the contribution of a single massive spinor field to the power spectrum of primordial gravitational wave by using a retarded Green propagator. We find that the correction is scale invariant and of order ${H}^{4}/{M}_{P}^{4}$ for arbitrary spinor mass ${m}_{\ensuremath{\psi}}$. Additionally, we also observe that when ${m}_{\ensuremath{\psi}}\ensuremath{\gtrsim}H$, the dependence of correction on ${m}_{\ensuremath{\psi}}/H$ is nontrivial.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.92.023535

Authors: Kaixi Feng, Yun-Song Piao

Institutions: Chinese Academy of Sciences, University of Chinese Academy of Sciences, Institute of Theoretical Physics

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China

Awards: G3820771949, G8414864042