Diluting the cosmological constant in infinite volume extra dimensions

By G. Dvali, G. Gabadadze, M. Shifman. 2002

178 citations recorded by the source corpus.

We argue that the cosmological constant problem can be solved in a braneworld model with infinite-volume extra dimensions, avoiding no-go arguments applicable to theories that are four-dimensional in the infrared. Gravity on the brane becomes higher-dimensional at super-Hubble distances, which entails that the relation between the acceleration rate and vacuum energy density flips upside down compared to the conventional one. The acceleration rate decreases with increasing the energy density. The experimentally acceptable rate is obtained for the energy density larger than (1 TeV)$^4$. The results are stable under quantum corrections because supersymmetry is broken only on the brane and stays exact in the bulk of infinite volume extra space. Consistency of 4D gravity and cosmology on the brane requires the quantum gravity scale to be around $10^{-3}$ eV. Testable predictions emerging within this approach are: (i) simultaneous modifications of gravity at sub-millimeter and the Hubble scales; (ii) Hagedorn-type saturation in TeV energy collisions due to the Regge spectrum with the spacing equal to $10^{-3}$ eV.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/7994f03fa87b1920cdf19392e2fa8073f5cdeb66

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Citations in the corpus

On couplings to matter in massive (bi-)gravity (2014, background): “If massive gravity was ever to tackle the old cosmological constant problem it would more likely be via the idea of degravitation [40–44] where the vacuum energy or cosmological constant could be large but have a small effect on the geometry.”
Classical and Quantum Consistency of the DGP Model (2004, unknown): “[6]).”
The ESSENCE Supernova Survey: Survey Optimization, Observations, and Supernova Photometry (2007, background): “Another class of ideas appeals to higher dimensional ‘‘braneworld’’ physics inspired by string theory: for example, the cyclic universe (Steinhardt & Turok 2002; Steinhardt & Turok 2005), or modifications to gravity due to the existence of extra dimensions (Dvali et al. 2003).”
Categorizing Different Approaches to the Cosmological Constant Problem (2004, methodology): “In [90, 91, 92, 93, 94, 95], a model based on infinite volume extra dimensions is presented.”
Theoretical Aspects of Massive Gravity (2011, unknown): “This mechanism is known as degravitation [53, 54, 52, 55].”
Cascading gravity and degravitation (2007, background): “A phenomenological modification to Einstein gravity that encapsulates this behavior is [4, 6]”
Galileon as a local modification of gravity (2008, background): “It potentially represents a stepping stone towards the realization of the old idea of diluting the cosmological constant into extra dimensions [8, 9].”
Testing modified gravity at cosmological distances with LISA standard sirens (2019, methodology): “An explicit example of a model of this class is provided by the DvaliGabadadze-Porrati (DGP) model [114] that, when projected onto the four-dimensional brane and linearized around Minkowski space, is equivalent to a nonlocal theory for the fluctuations hμν whose covariantization, at least to linear ”
Supersymmetric unification without low energy supersymmetry and signatures for fine-tuning at the LHC (2004, background): “Perhaps the CC is small because of the UV/IR connection, holography and the mysteries of gravity in deSitter space [9], perhaps the graviton is composite at the millimeter scale [10], or maybe gravity is modified in the IR in a way that prevents the large vacuum energy from giving rise to an unaccep”