The Standard Model; Particle Content and Symmetry

2017 ◽  
pp. 87-112
Keyword(s):  
Standard Model ◽  
Standard Model Particle ◽  
Particle Content ◽  
Model Particle ◽  
The Standard Model

scholarly journals NUCLEAR PHYSICS IN A SUSY UNIVERSE

2010 ◽  
Vol 25 (39) ◽  
pp. 3291-3298
Author(s):  
L. CLAVELLI ◽  
I. PEREVALOVA
Keyword(s):  
Standard Model ◽  
Nuclear Physics ◽  
Vacuum Energy ◽  
Standard Model Particle ◽  
Zeroth Order ◽  
Particle Content ◽  
Model Particle ◽  
Order Analysis ◽  
String Landscape

We refine a previous zeroth-order analysis of the nuclear properties of a supersymmetric (SUSY) universe with standard model particle content plus degenerate SUSY partners. No assumptions are made concerning the Higgs structure except we assume that the degenerate fermion/sfermion masses are nonzero. This alternate universe has been dubbed Susyria and it has been proposed that such a world may exist with zero vacuum energy in the string landscape.

scholarly journals Light neutrino masses from gravitational condensation: the Schwinger–Dyson approach

2021 ◽  
Vol 81 (6) ◽  
Author(s):  
Gabriela Barenboim ◽  
Jessica Turner ◽  
Ye-Ling Zhou
Keyword(s):  
Standard Model ◽  
Symmetry Breaking ◽  
Degrees Of Freedom ◽  
Chiral Symmetry Breaking ◽  
Planck Scale ◽  
Neutrino Masses ◽  
Beyond The Standard Model ◽  
Standard Model Particle ◽  
Particle Content ◽  
The Standard Model

AbstractIn this work we demonstrate that non-zero neutrino masses can be generated from gravitational interactions. We solve the Schwinger–Dyson equations to find a non-trivial vacuum thereby determining the neutrino condensate scale and the number of new particle degrees of freedom required for gravitationally induced dynamical chiral symmetry breaking. We show for minimal beyond the Standard Model particle content, the scale of the condensation occurs close to the Planck scale.

scholarly journals THE LIMITS OF CUSTODIAL SYMMETRY

2010 ◽  
Vol 25 (27n28) ◽  
pp. 5082-5096
Author(s):  
R. SEKHAR CHIVUKULA ◽  
ROSHAN FOADI ◽  
ELIZABETH H. SIMMONS ◽  
STEFANO DI CHIARA
Keyword(s):  
Standard Model ◽  
Top Quark ◽  
Quark Mass ◽  
Electroweak Symmetry ◽  
Top Quark Mass ◽  
Particle Content ◽  
Dirac Mass ◽  
The Standard Model ◽  
Custodial Symmetry ◽  
Weak Doublet

We introduce a toy model implementing the proposal of using a custodial symmetry to protect the [Formula: see text] coupling from large corrections. This "doublet-extended standard model" adds a weak doublet of fermions (including a heavy partner of the top quark) to the particle content of the standard model in order to implement an O(4) × U(1)X ~ SU(2)L × SU(2)R × PLR × U(1)X symmetry in the top-quark mass generating sector. This symmetry is softly broken to the gauged SU(2)L × U(1)Y electroweak symmetry by a Dirac mass M for the new doublet; adjusting the value of M allows us to explore the range of possibilities between the O(4)-symmetric (M → 0) and standard-model-like (M → ∞) limits.

scholarly journals Electroweak Baryogenesis with Anomalous Higgs Couplings

2016 ◽  
Vol 43 ◽  
pp. 1660200
Author(s):  
Archil Kobakhidze ◽  
Lei Wu ◽  
Jason Yue
Keyword(s):  
Phase Transition ◽  
Higgs Boson ◽  
Gauge Symmetry ◽  
Top Quark ◽  
Standard Model Particle ◽  
Particle Content ◽  
First Order ◽  
First Order Phase Transition ◽  
The Standard Model ◽  
First Order Phase

In non-linear realisation of the electroweak gauge symmetry, the LHC Higgs boson can be assumed to be a singlet under [Formula: see text]. In such scenario, the Standard Model particle content can be kept but new sets of couplings are allowed. We identify a range of anomalous Higgs cubic and the [Formula: see text]-violating Higgs-top quark couplings that leads to first order phase transition and successful baryogenesis at the electroweak scale.

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