Scalar gravitational waves from scalar-tensor gravity: Production and response of interferometers

Capozziello, S.; Corda, C.

doi:10.1142/S0218271806008814

Scalar gravitational waves from scalar-tensor gravity: Production and response of interferometers

S. Capozziello
(
- Naples U. and
- INFN, Naples
)
,
C. Corda
(
- INFN, Pisa and
- Pisa U. and
- EGO, Pisa
)

2006

32 pages

Published in:

Int.J.Mod.Phys.D 15 (2006) 1119-1150

DOI:

10.1142/S0218271806008814

reference search55 citations

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Abstract: (WSP)

Scalar-tensor gravity admits the existence of scalar modes of gravitational waves (SGWs). The mechanism of production and the response of interferometers to these scalar components of gravitational waves can be studied in three different gauges in the massless case: the transverse-traceless (TT) gauge, the so-called "Shibata, Nakao and Nakamura" (SNN) gauge, and the local Lorentz gauge. The response of interferometers to massless SGWs is invariant in these different gauges. Our work generalizes previous results which, in the study of the coupling between interferometers and massless SGWs, started from the assumption that the wavelength of the SGW is much larger than the distance between the test masses. Furthermore, considering situations motivated by string-dilaton gravity, the effect of a small mass term on the response of the interferometer is taken into account. In this case (massive SGW), we have a longitudinal effect, the response of an arm of an interferometer, which is aligned in the wave propagat...

04.50.+h
04.80.Nn
04.30.Nk
Scalar-tensor gravity
gravitational waves
interferometers
gravitation: scalar tensor
gravitational radiation: scalar
gauge
interferometer

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