Variable cosmological constant as a Planck scale effect

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Variable Cosmological Constant as a Planck Scale Effect

We construct a semiclassical FLRW cosmological model assuming a running cosmological constant (CC). It turns out that the CC becomes variable at arbitrarily low energies due to the remnant quantum effects of the heaviest particles, e.g. the Planck scale physics. These effects are universal in the sense that they lead to a low-energy structure common to a large class of high-energy theories. Rem...

متن کامل

Cosmological constant, renormalization group and Planck scale physics

Starting from generic quantum effects at the Planck scale MP , we find that the renormalization group running of the cosmological constant (CC) at low energies is possible if there is a smooth decoupling of all massive particles from MP to the mass of the lightest neutrino, mν . We discuss the theoretical implications of this running for the “old” and “new” cosmological constant problems. Inter...

متن کامل

String Scale Cosmological Constant

The cosmological constant is an unexplained until now phenomena of nature that requires an explanation through string effects. The apparent discrepancy between theory and experiment is enourmous and has already been explained several times by the author including mechanisms. In this work the string theory theory of abolished string modes is documented and given perturbatively to all loop orders...

متن کامل

Parameter extraction by Planck for a CDM model with broken scale invariance and cosmological constant

We consider a class of spatially flat cold dark matter (CDM) models, with a cosmological constant and a broken-scale-invariant (BSI) steplike primordial spectrum of adiabatic perturbations, previously found to be in very good agreement with observations. Performing a Fisher matrix analysis, we show that in case of a large gravitational waves (GW) contribution some free parameters (defining the ...

متن کامل

Cosmological constant in SUGRA models with Planck scale SUSY breaking and degenerate vacua

Article history: Received 10 May 2014 Received in revised form 4 July 2014 Accepted 12 August 2014 Available online 15 August 2014 Editor: M. Cvetič The empirical mass of the Higgs boson suggests small to vanishing values of the quartic Higgs selfcoupling and the corresponding beta function at the Planck scale, leading to degenerate vacua. This leads us to suggest that the measured value of the...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Physics Letters B

سال: 2003

ISSN: 0370-2693

DOI: 10.1016/j.physletb.2003.09.016