Delta-gravity and Dark Energy

We present a model of the gravitational field based on two symmetric tensors. The equations of motion of test particles are derived: Massive particles do not follow a geodesic but massless particles trajectories are null geodesics of an effective metric. Outside matter, the predictions of the model coincide exactly with General Relativity, so all classical tests are satisfied. In Cosmology, we get accelerated expansion without a cosmological constant.

Note:

latex, 15 pages, accepted for publication in Physics Letters B

04.50.Kd
95.36.+x
gravitation: model
expansion: acceleration
field theory: tensor
dark energy
space-time: Robertson-Walker
trajectory
redshift
approximation: nonrelativistic

References(40)

Figures(0)

Experimental Tests of General Relativity

Slava G. Turyshev
(
- Caltech, JPL and
- Sternberg Astron. Inst.
)

- Ann.Rev.Nucl.Part.Sci. 58 (2008) 207-248
•
e-Print:
- 0806.1731
•
DOI:
- 10.1146/annurev.nucl.58.020807.111839

Strategies for Determining the Nature of Dark Matter

Dan Hooper
(
- Fermilab
)
,
Edward A. Baltz
(
- KIPAC, Menlo Park
)

- Ann.Rev.Nucl.Part.Sci. 58 (2008) 293-314
•
e-Print:
- 0802.0702
•
DOI:
- 10.1146/annurev.nucl.58.110707.171217

- Ann.Rev.Nucl.Part.Sci. 58 293314

Observational evidence from supernovae for an accelerating universe and a cosmological constant

et al.

- Astron.J. 116 (1998) 1009-1038
•
e-Print:
- astro-ph/9805201
•
DOI:
- 10.1086/300499

Measurements of $\Omega$ and $\Lambda$ from 42 High Redshift Supernovae

Supernova Cosmology Project

Collaboration

•

S. Perlmutter
(
- UC, Berkeley, CfPA
)

et al.

- Astrophys.J. 517 (1999) 565-586
•
e-Print:
- astro-ph/9812133
•
DOI:
- 10.1086/307221

The Physics of Cosmic Acceleration

Robert R. Caldwell
(
- Dartmouth Coll.
)
,
Marc Kamionkowski
(
- Caltech
)

- Ann.Rev.Nucl.Part.Sci. 59 (2009) 397-429
•
e-Print:
- 0903.0866
•
DOI:
- 10.1146/annurev-nucl-010709-151330

Dark Energy and the Accelerating Universe

- Ann.Rev.Astron.Astrophys. 46 (2008) 385-432
•
e-Print:
- 0803.0982
•
DOI:
- 10.1146/annurev.astro.46.060407.145243

A Modification of the Newtonian dynamics as a possible alternative to the hidden mass hypothesis

M. Milgrom
(
- Weizmann Inst.
)

- Astrophys.J. 270 (1983) 365-370
•
DOI:
- 10.1086/161130

Relativistic gravitation theory for the MOND paradigm

Jacob D. Bekenstein
(
- Hebrew U.
)

- Phys.Rev.D 70 (2004) 083509,
- Phys.Rev.D 71 (2005) 069901 (erratum)
•
e-Print:
- astro-ph/0403694
•
DOI:
- 10.1103/PhysRevD.70.083509

Modified gravity models of dark energy

Shinji Tsujikawa
(
- Tokyo U. of Sci.
)

- Lect.Notes Phys. 800 (2010) 99-145
•
e-Print:
- 1101.0191
•
DOI:
- 10.1007/978-3-642-10598-2_3

Cosmological Constant and Elementary Particles

Y.B. Zeldovich

- JETP Lett. 6 (1967) 316,
- Pisma Zh.Eksp.Teor.Fiz. 6 (1967) 883

Vacuum quantum fluctuations in curved space and the theory of gravitation

A.D. Sakharov
(
- Lebedev Inst.
)

- Sov.Phys.Dokl. 12 (1968) 1040-1041,
- Dokl.Akad.Nauk Ser.Fiz. 177 (1967) 70-71,
- Sov.Phys.Usp. 34 (1991) 5, 394,
- Gen.Rel.Grav. 32 (2000) 365-367,
- Usp.Fiz.Nauk 161 (1991) 5, 64-66,
•
DOI:
- 10.1070/PU1991v034n05ABEH002498

- Phys.Scripta 9 69

Einstein Gravity as a Symmetry-Breaking Effect in Quantum Field Theory

Stephen L. Adler
(
- Princeton, Inst. Advanced Study
)

- Rev.Mod.Phys. 54 (1982) 729,
- Rev.Mod.Phys. 55 (1983) 837 (erratum),
•
DOI:
- 10.1103/RevModPhys.54.729

- Phys.Rev.Lett. 92 201

Non-relativistic Branes

Luca Mazzucato
(
- Tel Aviv U. and
- SUNY, Stony Brook
)
,
Yaron Oz
(
- Tel Aviv U.
)
,
Stefan Theisen
(
- Potsdam, Max Planck Inst.
)

- JHEP 04 (2009) 073
•
e-Print:
- 0810.3673
•
DOI:
- 10.1088/1126-6708/2009/04/073

On fixed points of quantum gravity

Daniel F. Litim
(
- Southampton U. and
- CERN
)

- AIP Conf.Proc. 841 (2006) 1, 322-329
•
e-Print:
- hep-th/0606044
•
DOI:
- 10.1063/1.2218188

Investigating the Ultraviolet Properties of Gravity with a Wilsonian Renormalization Group Equation

Alessandro Codello
(
- Mainz U., Inst. Phys.
)
,
Roberto Percacci
(
- Utrecht U. and
- SISSA, Trieste and
- INFN, Trieste
)
,
Christoph Rahmede
(
- SISSA, Trieste and
- INFN, Trieste
)

- Annals Phys. 324 (2009) 414-469
•
e-Print:
- 0805.2909
•
DOI:
- 10.1016/j.aop.2008.08.008

Functional Renormalization Group Equations, Asymptotic Safety, and Quantum Einstein Gravity

Martin Reuter
(
- Mainz U., Inst. Phys.
)
,
Frank Saueressig
(
- Utrecht U.
)

A Nonperturbative Lorentzian path integral for gravity

- Phys.Rev.Lett. 85 (2000) 924-927
•
e-Print:
- hep-th/0002050
•
DOI:
- 10.1103/PhysRevLett.85.924

The emergence of geometry: a two-dimensional toy model

Jorge Alfaro
(
- Rio de Janeiro, Pont. U. Catol.
)
,
Domene Espriu
(
- CERN
)
,
Daniel Puigdomenech
(
- Barcelona U., ECM and
- Barcelona U.
)

- Phys.Rev.D 82 (2010) 045018
•
e-Print:
- 1004.3664
•
DOI:
- 10.1103/PhysRevD.82.045018

Nonlinear realizations of space-time symmetries. Scalar and tensor gravity

- Annals Phys. 62 (1971) 98-119
•
DOI:
- 10.1016/0003-4916(71)90269-7

Theory of Dynamical Affine and Conformal Symmetries as Gravity Theory

A.B. Borisov
(
- Dubna, JINR
)
,
V.I. Ogievetsky
(
- Dubna, JINR
)

- Theor.Math.Phys. 21 (1975) 1179,
- Teor.Mat.Fiz. 21 (1974) 329-342,
•
DOI:
- 10.1007/BF01038096

Gauge Theories as Theories of Spontaneous Breakdown

E.A. Ivanov
(
- Dubna, JINR
)
,
V.I. Ogievetsky
(
- Dubna, JINR
)

- Lett.Math.Phys. 1 (1976) 309-313
•
DOI:
- 10.1007/BF00398486

Symmetry restoration in spontaneously broken induced gravity

Daniele Amati
(
- SISSA, Trieste and
- INFN, Trieste
)
,
Jorge Russo
(
- SISSA, Trieste and
- INFN, Trieste
)

- Phys.Lett.B 248 (1990) 44-50,
- Phys. Lett. B248 (1990) 44-50 and Trieste Int. Sch. Adv. Stud. - 90-086 (90,rec.Sep.) 14 p
•
DOI:
- 10.1016/0370-2693(90)90012-U

1-25 of 40
1
2
25 / page