scholarly journals Approaching the conformal window: systematic study of the particle spectrum in SU(2) field theory with $N_f=$2,4 and 6.

2016 ◽  
Author(s):  
Sara Tähtinen ◽  
Alessandro Amato ◽  
Teemu Rantalaiho ◽  
Kari Rummukainen ◽  
Kimmo Tuominen
Keyword(s):  
Field Theory ◽  
Systematic Study ◽  
Particle Spectrum ◽  
Conformal Window

scholarly journals On the particle spectrum and the conformal window

2014 ◽  
Vol 2014 (12) ◽  
Author(s):  
M. P. Lombardo ◽  
K. Miura ◽  
T. J. Nunes da Silva ◽  
E. Pallante
Keyword(s):  
Particle Spectrum ◽  
Conformal Window

CONFORMALLY COVARIANT COUPLED NON-LINEAR FIELD THEORY ON THE HYPERCONE: VACUUM SOLUTIONS AND QUANTIZATION OF NORMAL MODES

1988 ◽  
Vol 03 (02) ◽  
pp. 161-165
Author(s):  
T. AÇIKTEPE ◽  
K.G. AKDENIZ ◽  
A.O. BARUT ◽  
J. KALAYCI
Keyword(s):  
Field Theory ◽  
Normal Modes ◽  
Scalar Fields ◽  
Particle Spectrum ◽  
Geometric Meaning ◽  
Model Type ◽  
Quantized Fields ◽  
Non Linear ◽  
Vacuum Solutions ◽  
Linear Field

For the conformally covariant coupled non-linear spinor-scalar fields of the σ -model type we show that the non-trivial vacuum instanton solutions have a geometric meaning as constant spinors on the five-dimensional hypercone. The quantized fields around these solutions correspond to the normal modes of the hypercone. A connection is thus established between field theory, particle spectrum of the fields and quantized excitations of a geometry (the hypercone).

scholarly journals Uncovering the effective spacetime: Lessons from the effective field theory rationale

2015 ◽  
Vol 24 (12) ◽  
pp. 1544019 ◽  
Author(s):  
Carlos Barceló ◽  
Raúl Carballo-Rubio ◽  
Luis J. Garay
Keyword(s):  
Field Theory ◽  
General Relativity ◽  
Cosmological Constant ◽  
Effective Field Theory ◽  
High Energy ◽  
Effective Field ◽  
Effective Theory ◽  
Particle Spectrum ◽  
Low Energies ◽  
Minimal Modification

The cosmological constant problem can be understood as the failure of the decoupling principle behind effective field theory, so that some quantities in the low-energy theory are extremely sensitive to the high-energy properties. While this reflects the genuine character of the cosmological constant, finding an adequate effective field theory framework which avoids this naturalness problem may represent a step forward to understand nature. Following this intuition, we consider a minimal modification of the structure of general relativity which as an effective theory permits to work consistently at low energies, i.e. below the quantum gravity scale. This effective description preserves the classical phenomenology of general relativity and the particle spectrum of the standard model, at the price of changing our conceptual and mathematical picture of spacetime.

scholarly journals Particle spectrum created through bubble nucleation and quantum field theory in the Milne universe

1995 ◽  
Vol 51 (6) ◽  
pp. 2968-2978 ◽  
Author(s):  
Kazuhiro Yamamoto ◽  
Takahiro Tanaka ◽  
Misao Sasaki
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Bubble Nucleation ◽  
Particle Spectrum ◽  
Quantum Field

scholarly journals FINITE ELECTROWEAK THEORY WITHOUT A HIGGS PARTICLE

1991 ◽  
Vol 06 (11) ◽  
pp. 1011-1021 ◽  
Author(s):  
J.W. MOFFAT
Keyword(s):  
Field Theory ◽  
Local Field ◽  
Fine Tuning ◽  
Electroweak Theory ◽  
Particle Spectrum ◽  
Higgs Particle ◽  
Gauge Bosons ◽  
Local Field Theory ◽  
Local Point ◽  
Non Local

A unified electroweak theory is formulated using non-local field theory without including a Higgs particle. The W and Z gauge boson masses are induced from one-loop vacuum polarization graphs and the non-local weak scale is determined by the W boson mass and the Fermi constant to be Λw=424 GeV . The tree graphs for the gauge bosons are identical to those of the standard local electroweak theory, so any violation of locality occurs only at the quantum level for the finite loop graphs. The fermion masses are obtained from a four-Fermi interaction with a spontaneously broken vacuum based on the fermion condensate [Formula: see text]. The problem of severe fine tuning for the quark condensates in the standard local point field theory is avoided in our non-local field theory. The theory contains only the known particle spectrum of leptons, quarks, the anticipated top quark, the W and Z gauge bosons and the photon. The quark condensates could generate a spectrum of heavy vector bound states at an energy scale ~1−2 TeV .

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