Search results for "Planck particle"

showing 2 items of 2 documents

The role of the Planck scale in black hole radiance

2008

Lorentz invariance plays a pivotal role in the derivation of the Hawking effect, which crucially requires an integration in arbitrarily small distances or, equivalently, in unbounded energies. New physics at the Planck scale could, therefore, potentially modify the emission spectrum. We argue, however, that the kinematic invariance can be deformed in such a way that the thermal spectrum remains insensitive to trans-Planckian physics.

PhysicsPlanck energyPlanck particlePlanck massAstronomy and Astrophysicssymbols.namesakeMicro black holePlanck forceSpace and Planetary ScienceQuantum mechanicssymbolsVirtual black holeMathematical PhysicsHawking radiationPlanck length
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New constraints on coupled dark energy from the Planck satellite experiment

2013

We present new constraints on coupled dark energy from the recent measurements of the cosmic microwave background anisotropies from the Planck satellite mission. We found that a coupled dark energy model is fully compatible with the Planck measurements, deriving a weak bound on the dark matter-dark energy coupling parameter xi = -0.49(-0.31)(+0.19) at 68% C.L. Moreover if Planck data are fitted to a coupled dark energy scenario, the constraint on the Hubble constant is relaxed to H-0 = 72.1(-2.3)(+3.2) km/s/Mpc, solving the tension with the Hubble Space Telescope (HST) value. We show that a combined PLANCK + HST analysis provides significant evidence for coupled dark energy finding a nonzer…

PhysicsNuclear and High Energy PhysicsPlanck energyCosmologiaPlanck particlePlanck massHubble ConstantPlanck momentumPlanck temperatureAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysicssymbols.namesakePlanck timePlanck forcesymbolsAstronomiaBaryon acoustic-oscillationsphysicsAstrophysics::Galaxy AstrophysicsPlanck length
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