scholarly journals Dynamics of a large extra dimension inspired hybrid inflation model

2002 ◽  
Vol 65 (10) ◽  
Author(s):  
Anne M. Green ◽  
Anupam Mazumdar
Keyword(s):  
Extra Dimension ◽  
Large Extra Dimension ◽  
Inflation Model ◽  
Hybrid Inflation

scholarly journals Kinematical test of large extra dimension in beta decay experiments

2013 ◽  
Vol 718 (3) ◽  
pp. 1020-1023 ◽  
Author(s):  
Victor S. Basto-Gonzalez ◽  
Arman Esmaili ◽  
Orlando L.G. Peres
Keyword(s):  
Beta Decay ◽  
Extra Dimension ◽  
Large Extra Dimension

scholarly journals Search for one large extra dimension with the DELPHI detector at LEP

2009 ◽  
Vol 60 (1) ◽  
pp. 17-23 ◽  
Author(s):  
J. Abdallah ◽  
◽  
P. Abreu ◽  
W. Adam ◽  
P. Adzic ◽  
...  
Keyword(s):  
Extra Dimension ◽  
Large Extra Dimension ◽  
Delphi Detector

scholarly journals LARGE NON-GAUSSIANITY FROM MULTI-BRID INFLATION

2011 ◽  
Vol 01 ◽  
pp. 108-113
Author(s):  
ATSUSHI NARUKO ◽  
MISAO SASAKI
Keyword(s):  
Scalar Field ◽  
General Feature ◽  
Present Model ◽  
The Other ◽  
Model Parameters ◽  
Exponential Potential ◽  
Inflation Model ◽  
Hybrid Inflation ◽  
Non Gaussian ◽  
Near Future

A model of multi-component hybrid inflation, dubbed multi-brid inflation, which may yield a large non-Gaussian paramter fNL, was proposed recently. In particular, for a two-brid inflation model with an exponential potential and the condition that the end of inflation is an ellipse in the field space, it was found that, while keeping the other observational quantities within the range consistent with observations, large non-Gaussianity is possible for certain inflationary trajectories. In this talk, in order to see if this result is a general feature of multi-brid inflation, we consider a model with a potential with an exponent quadratic in the scalar field components. We also consider a more general class of ellipses for the end of inflation. Focusing on the case of two-brid inflation, we find that large non-Gaussianity is also possible in the present model. Then by tuning the model parameters, we find that there exist models for which both the non-Gaussianity and the tensor-to-scalar ratio are large enough to be detected in the very near future.

scholarly journals Revisiting the large extra dimension effects onW-pair production at the LHC in next-to-leading order QCD

2012 ◽  
Vol 85 (1) ◽  
Author(s):  
Yu-Ming Bai ◽  
Lei Guo ◽  
Xiao-Zhou Li ◽  
Wen-Gan Ma ◽  
Ren-You Zhang
Keyword(s):  
Pair Production ◽  
Extra Dimension ◽  
Leading Order ◽  
Large Extra Dimension

scholarly journals Natural hybrid inflation model with large non-Gaussianity

2012 ◽  
Vol 706 (4-5) ◽  
pp. 243-250 ◽  
Author(s):  
Ki-Young Choi ◽  
Bumseok Kyae
Keyword(s):  
Natural Hybrid ◽  
Inflation Model ◽  
Hybrid Inflation

scholarly journals A small cosmological constant from a large extra dimension

2000 ◽  
Vol 480 (1-2) ◽  
pp. 193-199 ◽  
Author(s):  
Nima Arkani-Hamed ◽  
Savas Dimopoulos ◽  
Nemanja Kaloper ◽  
Raman Sundrum
Keyword(s):  
Cosmological Constant ◽  
Extra Dimension ◽  
Large Extra Dimension

scholarly journals FLRW UNIVERSES FROM "WAVE-LIKE" COSMOLOGIES IN 5D

2003 ◽  
Vol 12 (06) ◽  
pp. 1053-1065 ◽  
Author(s):  
J. PONCE DE LEON
Keyword(s):  
Extra Dimension ◽  
Rest Mass ◽  
Big Bang ◽  
Large Extra Dimension ◽  
Fully Integrated ◽  
Fifth Dimension ◽  
Higher Dimensional ◽  
Relative Change ◽  
The Big Bang ◽  
The Universe

We consider the evolution of a 4D-universe embedded in a five-dimensional (bulk) world with a large extra dimension and a cosmological constant. The cosmology in 5D possesses "wave-like" character in the sense that the metric coefficients in the bulk are functions of the extra coordinate and time in a way similar to a pulse or traveling wave propagating along the fifth dimension. This assumption is motivated by some recent work presenting the big-bang as a higher dimensional shock wave. We show that this assumption, together with an equation of state for the effective matter quantities in 4D, allows Einstein's equations to be fully integrated. We then recover the familiar FLRW universes, on the four-dimensional hypersurfaces orthogonal to the extra dimension. Regarding the extra dimension we find that it is growing in size if the universe is speeding up its expansion. We also get an estimate for the relative change of the extra dimension over time. This estimate could have important observational implications, notably for the time variation of rest mass, electric charge and the gravitational "constant". Our results extend previous ones in the literature.

Sign in / Sign up

Export Citation Format

Share Document