scholarly journals Radiative corrections to muon-electron universality in a gauge theory of charged-pion decay

1976 ◽  
Vol 14 (9) ◽  
pp. 2428-2430 ◽  
Author(s):  
Terrence J. Goldman ◽  
Warren J. Wilson
Keyword(s):  
Gauge Theory ◽  
Charged Pion ◽  
Pion Decay ◽  
Radiative Corrections

Radiative Corrections to Non-Abelian Gauge Theory in Homogeneous Self-Dual Backgrounds

1991 ◽  
Vol 503 (5) ◽  
pp. 343-352
Author(s):  
C. Eberlein ◽  
H. J. Kaiser ◽  
E. Wieczorek
Keyword(s):  
Gauge Theory ◽  
Radiative Corrections ◽  
Abelian Gauge ◽  
Abelian Gauge Theory

scholarly journals SYMMETRIES AND AMBIGUITIES IN THE LINEAR SIGMA MODEL WITH LIGHT QUARKS

2006 ◽  
Vol 21 (04) ◽  
pp. 339-347 ◽  
Author(s):  
E. W. DIAS ◽  
B. HILLER ◽  
A. L. MOTA ◽  
M. C. NEMES ◽  
M. SAMPAIO ◽  
...  
Keyword(s):  
Chiral Symmetry ◽  
Sigma Model ◽  
Decay Constant ◽  
Linear Sigma Model ◽  
Pion Decay ◽  
Radiative Corrections ◽  
Pion Decay Constant ◽  
Renormalization Procedure

We investigate the role of undetermined finite contributions generated by radiative corrections in an SU (2)× SU (2) linear sigma model with quarks. Although some of such terms can be absorbed in the renormalization procedure, one such contribution is left in the expression for the pion decay constant. This arbitrariness is eliminated by chiral symmetry.

scholarly journals Study of the five-charged-pion decay of the τ lepton

1994 ◽  
Vol 73 (7) ◽  
pp. 934-938 ◽  
Author(s):  
D. Gibaut ◽  
K. Kinoshita ◽  
B. Barish ◽  
M. Chadha ◽  
S. Chan ◽  
...  
Keyword(s):  
Charged Pion ◽  
Pion Decay

scholarly journals Pion decay in magnetic fields

2018 ◽  
Vol 175 ◽  
pp. 13005 ◽  
Author(s):  
Gunnar S. Bali ◽  
Bastian B. Brandt ◽  
Gergely Endrődi ◽  
Benjamin Gläße
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Decay Rate ◽  
Field Dependence ◽  
Magnetic Field Dependence ◽  
Charged Pion ◽  
Pion Decay ◽  
Total Decay Rate ◽  
Decay Constants ◽  
The Magnetic Field

The leptonic decay of the charged pion in the presence of background magnetic fields is investigated using quenched Wilson fermions. It is demonstrated that the magnetic field opens up a new channel for this decay. The magnetic field-dependence of the decay constants for both the ordinary and the new channel is determined. Using these inputs from QCD, we calculate the total decay rate perturbatively.

scholarly journals GAUGED THIRRING MODEL IN THE HEISENBERG PICTURE

2000 ◽  
Vol 15 (20) ◽  
pp. 3263-3275 ◽  
Author(s):  
J. T. LUNARDI ◽  
B. M. PIMENTEL ◽  
L. A. MANZONI
Keyword(s):  
Gauge Theory ◽  
Gauge Boson ◽  
Vacuum Polarization ◽  
Thirring Model ◽  
Polarization Tensor ◽  
Radiative Corrections ◽  
Heisenberg Picture ◽  
Boson Propagator ◽  
Vacuum Polarization Tensor

We consider the (2+1)-dimensional gauged Thirring model in the Heisenberg picture. In this context we evaluate the vacuum polarization tensor as well as the corrected gauge boson propagator and address the issues of generation of mass and dynamics for the gauge boson (in the limits of QED3 and Thirring model as a gauge theory, respectively) due to the radiative corrections.

A THREE-DIMENSIONAL GAUGE THEORY COUPLED TO FERMIONIC SCALARS AND VECTORS

1994 ◽  
Vol 09 (30) ◽  
pp. 5359-5367 ◽  
Author(s):  
D.G.C. McKEON
Keyword(s):  
Gauge Theory ◽  
Vector Field ◽  
Temperature Dependence ◽  
Gauge Field ◽  
Gauge Transformation ◽  
Lorentz Transformation ◽  
Spinor Field ◽  
Tensor Field ◽  
Three Dimensional ◽  
Radiative Corrections

By involving the group indices of an SU(2) gauge theory in three Euclidean dimensions in the Lorentz transformation, one finds that the gauge field can be decomposed into a scalar, vector and tensor field which mix under a gauge transformation. It is shown how this gauge field can be coupled to an O(3) spinor field whose transformation properties allow one to decompose it into a fermionic scalar and a fermionic vector field. Radiative corrections must be done in a way that respects the dimensionality of the theory; it is demonstrated how operator regularization can be used to this end by computing the temperature dependence of the η function arising from spinors.

FORM-FACTOR OF RADIATIVE PION DECAY IN QCD

1991 ◽  
Vol 06 (25) ◽  
pp. 2327-2334 ◽  
Author(s):  
T. M. ALIEV ◽  
A. A. OVCHINNIKOV
Keyword(s):  
Form Factor ◽  
Radiative Decay ◽  
Sum Rules ◽  
Charged Pion ◽  
Pion Decay ◽  
Qcd Sum Rules ◽  
Axial Form Factor ◽  
Axial Form

Axial form-factor of the radiative decay of charged pion is calculated using QCD sum rules method for non-diagonal correlator. For the ratio γ=FA(0)/FV(0) we find γ=0.6±0.15.

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