scholarly journals Non-singular deformations of singular compactifications, the cosmological constant and the hierarchy problem

2000 ◽  
Vol 17 (18) ◽  
pp. 3865-3879 ◽  
Author(s):  
Alan Chodos ◽  
Erich Poppitz ◽  
Dimitrios Tsimpis
Keyword(s):  
Cosmological Constant ◽  
Hierarchy Problem

scholarly journals A simple assessment on the hierarchy problem

2016 ◽  
Vol 13 (06) ◽  
pp. 1650068 ◽  
Author(s):  
Luca Fabbri
Keyword(s):  
Standard Model ◽  
Cosmological Constant ◽  
Scalar Fields ◽  
Hierarchy Problem ◽  
Cosmological Constant Problem ◽  
The Standard Model

We consider the simplest extension of the standard model, where torsion couples to spinor as well as the scalar fields, and in which the cosmological constant problem is solved.

scholarly journals Quantum scale invariance, cosmological constant and hierarchy problem

2009 ◽  
Vol 671 (1) ◽  
pp. 162-166 ◽  
Author(s):  
Mikhail Shaposhnikov ◽  
Daniel Zenhäusern
Keyword(s):  
Cosmological Constant ◽  
Scale Invariance ◽  
Hierarchy Problem

scholarly journals Electroweak scale invariant models with small cosmological constant

2015 ◽  
Vol 30 (21) ◽  
pp. 1550126 ◽  
Author(s):  
Robert Foot ◽  
Archil Kobakhidze
Keyword(s):  
Cosmological Constant ◽  
Goldstone Boson ◽  
Higgs Doublet ◽  
Mass Relation ◽  
Hierarchy Problem ◽  
Electroweak Scale ◽  
Scale Invariant ◽  
The Standard Model ◽  
Pseudo Goldstone Boson ◽  
Generic Scale

We consider scale invariant models where the classical scale invariance is broken perturbatively by radiative corrections at the electroweak scale. These models potentially offer an elegant and simple solution to the hierarchy problem. If we further require the cosmological constant to be small then such models are also highly predictive. Indeed, the minimal such model, comprizing a Higgs doublet and a real singlet, has the same number of parameters as the standard model. Although this minimal model is disfavored by recent LHC data, we show that two specific extensions incorporating neutrino masses and dark matter are fully realistic. That is, consistent with all experiments and observations. These models predict a light pseudo-Goldstone boson, h, with mass around 10 GeV or less. A fermionic-bosonic mass relation is also predicted. The specific models considered, as well as more generic scale invariant models, can be probed at the LHC.

scholarly journals HIERARCHY PROBLEM IN THE SHELL-UNIVERSE MODEL

2002 ◽  
Vol 11 (10) ◽  
pp. 1635-1638 ◽  
Author(s):  
MERAB GOGBERASHVILI
Keyword(s):  
Cosmological Constant ◽  
Thin Shell ◽  
Universe Model ◽  
Particle Theory ◽  
Hierarchy Problem ◽  
The Universe ◽  
Hyper Space

In the model where the Universe is considered as a thin shell expanding in five-dimensional hyper-space there is a possibility to obtain one scale for particle theory corresponding to the five-dimensional cosmological constant and Universe thickness.

scholarly journals THE EFFECT OF 4D EFFECTIVE COSMOLOGICAL CONSTANT ON THE STABILITY OF RANDALL–SUNDRUM SCENARIO

2002 ◽  
Vol 17 (20) ◽  
pp. 1291-1296
Author(s):  
YUN-SONG PIAO ◽  
RONG-GEN CAI ◽  
XINMIN ZHANG
Keyword(s):  
Cosmological Constant ◽  
Hierarchy Problem ◽  
Proper Distance ◽  
Effective Cosmological Constant ◽  
The Stability

We study the Randall–Sundrum model with a small 4D effective cosmological constant on the brane, and drive a corrected radion potential following the Goldberger–Wise mechanism. We then discuss the effect of the 4D effective cosmological constant on the stability of the brane-system, and find that to quintessence determined by updated observation, the proper distance between the two branes required to solve the hierarchy problem can exist. However, during inflation, whether we can get a reasonable hierarchy scale is still uncertain.

scholarly journals Surprises with nonrelativistic naturalness

2016 ◽  
Vol 25 (13) ◽  
pp. 1645007 ◽  
Author(s):  
Petr Hořava
Keyword(s):  
Scalar Field ◽  
Cosmological Constant ◽  
Higgs Mass ◽  
Condensed Matter ◽  
Mass Hierarchy ◽  
Hierarchy Problem ◽  
Cosmological Constant Problem ◽  
Fundamental Physics ◽  
Mass Hierarchy Problem

We explore the landscape of technical naturalness for nonrelativistic systems, finding surprises which challenge and enrich our relativistic intuition already in the simplest case of a single scalar field. While the immediate applications are expected in condensed matter and perhaps in cosmology, the study is motivated by the leading puzzles of fundamental physics involving gravity: the cosmological constant problem and the Higgs mass hierarchy problem.

scholarly journals GRAVITY, COSMOLOGY AND PARTICLE PHYSICS WITHOUT THE COSMOLOGICAL CONSTANT PROBLEM

1998 ◽  
Vol 13 (19) ◽  
pp. 1583-1586 ◽  
Author(s):  
E. I. GUENDELMAN ◽  
A. B. KAGANOVICH
Keyword(s):  
Cosmological Constant ◽  
Particle Physics ◽  
Vacuum Energy ◽  
Vacuum State ◽  
Scalar Fields ◽  
Fine Tuning ◽  
Gauge Fields ◽  
Hierarchy Problem ◽  
Cosmological Constant Problem ◽  
First Order

This letter elucidates recent achievements of the "nongravitating vacuum energy (NGVE) theory" which has the feature that a shift of the Lagrangian density by a constant does not affect dynamics. In the first-order formalism, a constraint appears that enforces the vanishing of the cosmological constant Λ. Standard dynamics of gauge unified theories (including fermions) and their SSB appear if a four-index field strength condensate is present. At the vacuum state, there is exact balance (to zero) of the gauge fields condensate and the original scalar fields potential. As a result it is possible to combine the solution of the Λ problem with inflation and transition to a Λ=0 phase without fine tuning after a reheating period. The model opens new possibilities for a solution of the hierarchy problem.

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