scholarly journals Evading the few TeV perturbative limit in 3-3-1 models

2005 ◽  
Vol 71 (1) ◽  
Author(s):  
Alex Gomes Dias
Keyword(s):  
Perturbative Limit

Laser Driven Ion Traps: Beyond the Standard Perturbative Limit

2004 ◽  
Vol 20 (1-2) ◽  
pp. 129-132
Author(s):  
P. Aniello ◽  
V.I. Man'ko ◽  
G. Marmo ◽  
A. Porzio ◽  
F. Zaccaria ◽  
...  
Keyword(s):  
Ion Traps ◽  
Perturbative Limit

Reorganizing Finite Temperature Field Theory: Part I.: Scalar Field Theory

2001 ◽  
Vol 16 (supp01c) ◽  
pp. 1277-1280 ◽  
Author(s):  
Michael Strickland
Keyword(s):  
Field Theory ◽  
Perturbation Theory ◽  
Temperature Field ◽  
Finite Temperature ◽  
Weak Coupling ◽  
Weak Coupling Limit ◽  
Finite Temperature Field Theory ◽  
Expansion Point ◽  
Perturbative Limit ◽  
Standard Perturbation Theory

I present a method for self-consistently including the effects of screening in finite-temperature field theory calculations. The method reproduces the perturbative limit in the weak-coupling limit and for intermediate couplings this method has much better convergence than standard perturbation theory. The method relies on a reorganization of perturbation theory accomplished by shifting the expansion point used to calculate quantum loop corrections. I will present results from a three-loop calculation within this formalism for scalar λϕ4.

Nucleon Compton Scattering in the Perturbative Limit

2005 ◽  
Vol 36 (1-4) ◽  
pp. 237-240
Author(s):  
R. Thomson ◽  
Chueng-Ryong Ji
Keyword(s):  
Compton Scattering ◽  
Perturbative Limit

scholarly journals Perturbative and nonperturbative studies of CFTs with MN global symmetry

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Johan Henriksson ◽  
Andreas Stergiou
Keyword(s):  
Fixed Points ◽  
Numerical Data ◽  
Three Dimensions ◽  
Global Symmetry ◽  
Conformal Field Theories ◽  
Conformal Field ◽  
Conformal Bootstrap ◽  
State Of Affairs ◽  
Perturbative Limit ◽  
Good Agreement

Fixed points in three dimensions described by conformal field theories with \ensuremath{M N}_{m,n} = O(m)^n\rtimes S_nMNm,n=O(m)n⋊Sn global symmetry have extensive applications in critical phenomena. Associated experimental data for m=n=2m=n=2 suggest the existence of two non-trivial fixed points, while the \varepsilonε expansion predicts only one, resulting in a puzzling state of affairs. A recent numerical conformal bootstrap study has found two kinks for small values of the parameters mm and nn, with critical exponents in good agreement with experimental determinations in the m=n=2m=n=2 case. In this paper we investigate the fate of the corresponding fixed points as we vary the parameters mm and nn. We find that one family of kinks approaches a perturbative limit as mm increases, and using large spin perturbation theory we construct a large mm expansion that fits well with the numerical data. This new expansion, akin to the large NN expansion of critical O(N)O(N) models, is compatible with the fixed point found in the \varepsilonε expansion. For the other family of kinks, we find that it persists only for n=2n=2, where for large mm it approaches a non-perturbative limit with \Delta_\phi\approx 0.75Δϕ≈0.75. We investigate the spectrum in the case \ensuremath{M N}_{100,2}MN100,2 and find consistency with expectations from the lightcone bootstrap.

scholarly journals Perturbative limit of the two-pion light-cone distribution amplitude

2000 ◽  
Vol 61 (7) ◽  
Author(s):  
M. Diehl ◽  
Th. Feldmann ◽  
P. Kroll ◽  
C. Vogt
Keyword(s):  
Light Cone ◽  
Distribution Amplitude ◽  
Perturbative Limit

scholarly journals THE EFFECT OF A LIGHT RADION ON THE TRIVIALITY BOUND ON HIGGS MASS

2005 ◽  
Vol 20 (05) ◽  
pp. 1089-1093
Author(s):  
UMA MAHANTA ◽  
PRASANTA KUMAR DAS
Keyword(s):  
Standard Model ◽  
Higgs Mass ◽  
Electroweak Scale ◽  
The Standard Model ◽  
Presence And Absence ◽  
Perturbative Limit

In this paper we study how the triviality bound on Higgs mass in the context of the Standard Model is modified by a light stabilized radion of the Goldberger–Wise variety. Our approach is inherently perturbative. Including the radion contribution to β(λ) and β(gt) to one-loop we evolve the Higgs self coupling λ from the cutoff Λ(=<ϕ>) down to the electroweak scale μ0=v. The triviality bound is obtained by requiring that [Formula: see text] which is the perturbative limit. We also study the effect of small changes in the UVBC on the triviality bound both in the presence and absence of a light radion.

scholarly journals The effect of Yukawa couplings on unification predictions and the non-perturbative limit

1998 ◽  
Vol 528 (1-2) ◽  
pp. 35-58 ◽  
Author(s):  
G Amelino-Camelia ◽  
Dumitru Ghilencea ◽  
Graham G Ross
Keyword(s):  
Yukawa Couplings ◽  
Perturbative Limit
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