TY  - JOUR
AU  - Figueroa, D. G.
AU  - Florio, A.
AU  - Loayza, N.
AU  - Pieroni, M.
PY  - 2022
DA  - 2022//
TI  - Spectroscopy of particle couplings with gravitational waves
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 063522
EP  - 8pp
VL  - 106
IS  - 6
PB  - Amer Physical Soc
AB  - We discuss the possibility to measure particle couplings with stochastic gravitational wave backgrounds (SGWBs). Under certain circumstances a sequence of peaks of different amplitude and frequency-a stairway-emerges in a SGWB spectrum, with each peak probing a different coupling. The detection of such signature opens the possibility to reconstruct couplings (spectroscopy) of particle species involved in high energy phenomena generating SGWBs. Stairwaylike signatures may arise in causally produced backgrounds in the early Universe, e.g., from preheating or first order phase transitions. As a proof of principle we study a preheating scenario with an inflaton 0 coupled to multiple daughter fields f chi jg with different coupling strengths. As a clear stairway signature is imprinted in the SGWB spectrum, we reconstruct the relevant couplings with various detectors.
SN  - 2470-0010
UR  - https://arxiv.org/abs/2202.05805
UR  - https://doi.org/10.1103/PhysRevD.106.063522
DO  - 10.1103/PhysRevD.106.063522
LA  - English
N1  - WOS:000861731100002
ID  - Figueroa_etal2022
ER  -