Quantum electroweak symmetry breaking through loop quadratic contributions

Bai, Dong; Cui, Jianwei; Wu, Yonggang

doi:10.1016/j.physletb.2015.05.037

Cited by 11 publications

(7 citation statements)

References 40 publications

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“…It has been shown recently in Ref. [5] that, quadratic contributions from the SM Higgs sector can induce spontaneous electroweak symmetry breaking at Λ EW 750 GeV, given the SM parameters measured at the low energy as boundary conditions for the renormalization group equations. Such a mechanism is dubbed as quantum electroweak symmetry breaking, as quadratic contributions that play a significant role come from quantum loop effects.…”

Section: Introductionmentioning

confidence: 99%

Quadratic contributions of softly broken supersymmetry in the light of loop regularization

Bai

2017

Eur. Phys. J. C

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Loop regularization (LORE) is a novel regularization scheme in modern quantum field theories. It makes no change to the spacetime structure and respects both gauge symmetries and supersymmetry. As a result, LORE should be useful in calculating loop corrections in supersymmetry phenomenology. To further demonstrate its power, in this article we revisit in the light of LORE the old issue of the absence of quadratic contributions (quadratic divergences) in softly broken supersymmetric field theories. It is shown explicitly by Feynman diagrammatic calculations that up to two loops the Wess-Zumino model with soft supersymmetry breaking terms (WZ' model), one of the simplest models with the explicit supersymmetry breaking, is free of quadratic contributions. All the quadratic contributions cancel with each other perfectly, which is consistent with results dictated by the supergraph techniques.

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Section: Introductionmentioning

confidence: 99%

Quadratic contributions of softly broken supersymmetry in the light of loop regularization

Bai

2017

Eur. Phys. J. C

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“…In particular, it has been applied to calculate the gravitational contributions to gauge Green's functions and show the asymptotic free power-law running of gauge coupling [38]. More recently, it has been initiated to explore the quantum electroweak symmetry breaking mechanism for understanding the hierarchy problem [39].…”

Section: Perturbative Expansion and Renormalizability Of Quantizedmentioning

confidence: 99%

“…Note that it is such a loop quadratic contribution that causes the breaking of the global scaling symmetry. It has recently been shown that the quantum loop quadratic contributions can play an important role for understanding the electroweak symmetry breaking and hierarchy problem within the SM of particle physics [39]. Similarly, for a quantum-induced positive mass parameter µ 2 U ,μ 2 U > 0 with y 2 S ,ȳ 2 S > 0 and µ < M U , it causes an unstable potential and generates the inflation of the early Universe; namely, the Universe begins from an infinitely small conformal sizeφ ∼ 0 and approaches to an infinitely large conformal sizeφ → ∞.…”

Section: E Quantum Inflation Of Early Universementioning

confidence: 99%

Quantum field theory of gravity with spin and scaling gauge invariance and spacetime dynamics with quantum inflation

2016

Phys. Rev. D

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Treating the gravitational force on the same footing as the electroweak and strong forces, we present a quantum field theory of gravity based on spin and scaling gauge symmetries. A biframe spacetime is initiated to describe such a quantum gravity theory. The gravifield sided on both locally flat noncoordinate spacetime and globally flat Minkowski spacetime is an essential ingredient for gauging global spin and scaling symmetries. The locally flat gravifield spacetime spanned by the gravifield is associated with a non-commutative geometry characterized by a gauge-type field strength of the gravifield. A coordinate-independent and gauge-invariant action for the quantum gravity is built in the gravifield basis. In the coordinate basis, we derive equations of motion for all quantum fields including the gravitational effect and obtain basic conservation laws for all symmetries. The equation of motion for gravifield tensor is deduced in connection directly with the total energy-momentum tensor. When the spin and scaling gauge symmetries are broken down to a background structure that possesses the global Lorentz and scaling symmetries, we obtain exact solutions by solving equations of motion for the background fields in a unitary basis. The massless graviton and massive spinon result as physical quantum degrees of freedom. The resulting Lorentzinvariant and conformally flat background gravifield spacetime is characterized by a cosmic vector with a nonzero cosmological mass scale. The evolving Universe is, in general, not isotropic in terms of conformal proper time. The conformal size of the Universe becomes singular at the cosmological horizon and turns out to be inflationary in light of cosmic proper time. A mechanism for quantum scalinon inflation is demonstrated such that it is the quantum effect that causes the breaking of global scaling symmetry and generates the inflation of the early Universe, which is ended when the evolving vacuum expectation value of the scalar potential gets a minimal. Regarding the gravifield as a Goldstone-like field that transmutes the local spin gauge symmetry into the global Lorentz symmetry with a hidden general coordinate invariance, a spacetime gauge field is constructed from the spin gauge field that becomes a hidden gauge field. The bosonic gravitational interactions are described by the Goldstone-like gravimetric field and spacetime gauge field. Two types of gravity equation result; one is as the extension to Einstein's equation of general relativity, and the other is a new one that characterizes spinon dynamics. The Einstein theory of general relativity is considered to be an effective low-energy theory.

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“…[53] it is shown in the elementary Higgs-boson model that the quadratic term from high-order quantum corrections has a physical impact on the SSB and the phase transition to a symmetric phase occurs at the scale of order of TeV.…”

Section: Strong Critical Couplingmentioning

confidence: 99%

An effective strong-coupling theory of composite particles in UV-domain

Xue

2017

J. High Energ. Phys.

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We briefly review the effective field theory of massive composite particles, their gauge couplings and characteristic energy scale in the UV-domain of UV-stable fixed point of strong four-fermion coupling, then mainly focus the discussions on the decay channels of composite particles into the final states of the SM gauge bosons, leptons and quarks. We calculate the rates of composite bosons decaying into two gauge bosons γγ, γZ 0 , W + W − , Z 0 Z 0 and give the ratios of decay rates of different channels depending on gauge couplings only. It is shown that a composite fermion decays into an elementary fermion and a composite boson, the latter being an intermediate state decays into two gauge bosons, leading to a peculiar kinematics of final states of a quark (or a lepton) and two gauge bosons. These provide experimental implications of such an effective theory of composite particles beyond the SM. We also present some speculative discussions on the channels of composite fermions decaying into W W , W Z and ZZ two boson-tagged jets with quark jets, or to four-quark jets. Moreover, at the same energy scale of composite particles produced in high-energy experiments, composite particles are also produced by high-energy sterile neutrino (dark matter) collisions, their decays lead to excesses of cosmic ray particles in space and signals of SM particles in underground laboratories.

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Quantum electroweak symmetry breaking through loop quadratic contributions

Cited by 11 publications

References 40 publications

Quadratic contributions of softly broken supersymmetry in the light of loop regularization

Quadratic contributions of softly broken supersymmetry in the light of loop regularization

Quantum field theory of gravity with spin and scaling gauge invariance and spacetime dynamics with quantum inflation

An effective strong-coupling theory of composite particles in UV-domain

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