The Higgs mass coincidence problem

A recent work proposed that the recent cosmic passage to a cosmic acceleration era is the result of the existence of small anti-gravity sources in each galaxy and clusters of galaxies. In particular, a Swiss-cheese cosmology model, which relativistically integrates the contribution of all these anti-gravity sources on a galactic scale has been constructed assuming the presence of an infrared fixed point for a scale dependent cosmological constant. The derived cosmological expansion provides an explanation for both the fine tuning and the coincidence problem. The present work relaxes the previous assumption on the running of the cosmological constant and allows for a generic scaling around the infrared fixed point. Our analysis reveals that, in order to produce a cosmic evolution consistent with the best ΛCDM model, the IR-running of the cosmological constant is consistent with the presence of an IR-fixed point.

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Late Time Attractors of Some Varying Chaplygin Gas Cosmological Models

Symmetry ◽

10.3390/sym13050769 ◽

2021 ◽

Vol 13 (5) ◽

pp. 769

Author(s):

Martiros Khurshudyan ◽

Ratbay Myrzakulov

Keyword(s):

Dark Energy ◽

Gravitational Interaction ◽

Chaplygin Gas ◽

Cosmological Models ◽

Late Time ◽

Time Behavior ◽

Coincidence Problem ◽

Energy Models ◽

Non Linear ◽

Bayesian Machine Learning

The goal of this paper is to study new cosmological models where the dark energy is a varying Chaplygin gas. This specific dark energy model with non-linear EoS had been often discussed in modern cosmology. Contrary to previous studies, we consider new forms of non-linear non-gravitational interaction between dark matter and assumed dark energy models. We applied the phase space analysis allowing understanding the late time behavior of the models. It allows demonstrating that considered non-gravitational interactions can solve the cosmological coincidence problem. On the other hand, we applied Bayesian Machine Learning technique to learn the constraints on the free parameters. In this way, we gained a better understanding of the models providing a hint which of them can be ruled out. Moreover, the learning based on the simulated expansion rate data shows that the models cannot solve the H0 tension problem.

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A landscape for the cosmological constant and the Higgs mass

Journal of High Energy Physics ◽

10.1007/jhep01(2020)054 ◽

2020 ◽

Vol 2020 (1) ◽

Cited By ~ 1

Author(s):

Parsa Ghorbani ◽

Alessandro Strumia ◽

Daniele Teresi

Keyword(s):

Cosmological Constant ◽

Higgs Mass

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LIGHT COMPOSITE HIGGS: LCH @ LHC

International Journal of Modern Physics A ◽

10.1142/s0217751x05029162 ◽

2005 ◽

Vol 20 (27) ◽

pp. 6133-6148 ◽

Cited By ~ 18

Author(s):

FRANCESCO SANNINO

Keyword(s):

Gauge Group ◽

Higgs Mass ◽

Cold Dark Matter ◽

Precision Measurements ◽

Chiral Phase ◽

Symmetric Representation ◽

Composite Higgs ◽

Higher Dimensional ◽

The One ◽

Intrinsic Scale

Here I summarize some of the salient features of technicolor theories with technifermions in higher dimensional representations of the technicolor gauge group. The expected phase diagram as function of number of flavors and colors for the two index (anti)symmetric representation of the gauge group is reviewed. After having constructed the simplest walking technicolor theory one can show that it is not at odds with the precision measurements. The simplest theory also requires, for consistency, a fourth family of heavy leptons. The latter may result in an interesting signature at LHC. In the case of a fourth family of leptons with ordinary lepton hypercharge the new heavy neutrino can be a natural candidate of cold dark matter. New theories will also be proposed in which the critical number of flavors needed to enter the conformal window is higher than in the one with fermions in the two-index symmetric representation, but lower than in the walking technicolor theories with fermions only in the fundamental representation of the gauge group. Due to the near conformal/chiral phase transition the composite Higgs is very light compared to the intrinsic scale of the technicolor theory. For the two technicolor theory the composite Higgs mass is predicted not to exceed 150 GeV.

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A CALCULATION OF HIGGS MASS IN THE STANDARD MODEL

Modern Physics Letters A ◽

10.1142/s0217732300002140 ◽

2000 ◽

Vol 15 (26) ◽

pp. 1605-1610 ◽

Cited By ~ 3

Author(s):

J. PASUPATHY

Keyword(s):

Standard Model ◽

Yukawa Coupling ◽

Higgs Mass ◽

Renormalization Scale ◽

The Standard Model ◽

Gauge Couplings ◽

Top Mass

The assumption that the ratio of the Higgs self-coupling to the square of its Yukawa coupling to the top is (almost) independent of the renormalization scale fixes the Higgs mass within narrow limits at m H =160 GeV using only the values of gauge couplings and top mass.

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