We derive consistent equations for gravitational wave oscillations in bigravity. In this framework a second dynamical tensor field is introduced in addition to general relativity and coupled such that one massless and one massive linear combination arise. Only one of the two tensors is the physical metric coupling to matter, and thus the basis in which gravitational waves propagate is different from the basis where the wave is produced and detected. Therefore, one should expect - in analogy to neutrino oscillations - to observe an oscillatory behavior. We show for the first time how this behavior arises explicitly, discuss phenomenological implications, and present new limits on the graviton parameter space in bigravity.

Gravitational Wave Oscillations in Bigravity

Max, Kevin
;
Smirnov, Juri
2017

Abstract

We derive consistent equations for gravitational wave oscillations in bigravity. In this framework a second dynamical tensor field is introduced in addition to general relativity and coupled such that one massless and one massive linear combination arise. Only one of the two tensors is the physical metric coupling to matter, and thus the basis in which gravitational waves propagate is different from the basis where the wave is produced and detected. Therefore, one should expect - in analogy to neutrino oscillations - to observe an oscillatory behavior. We show for the first time how this behavior arises explicitly, discuss phenomenological implications, and present new limits on the graviton parameter space in bigravity.
2017
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
General Relativity and Quantum Cosmology; General Relativity and Quantum Cosmology; High Energy Physics - Experiment; High Energy Physics - Phenomenology; Physics and Astronomy (all)
File in questo prodotto:
File Dimensione Formato  
PhysRevLett.119.111101.pdf

accesso aperto

Tipologia: Published version
Licenza: Solo Lettura
Dimensione 320.83 kB
Formato Adobe PDF
320.83 kB Adobe PDF
11384_79087.pdf

accesso aperto

Tipologia: Submitted version (pre-print)
Licenza: Solo Lettura
Dimensione 1.18 MB
Formato Adobe PDF
1.18 MB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/79087
Citazioni
  • ???jsp.display-item.citation.pmc??? 2
  • Scopus 35
  • ???jsp.display-item.citation.isi??? 34
social impact