scholarly journals Zero mode effect generalization for the electromagnetic current in the light front

2013 ◽  
Vol 88 (2) ◽  
Author(s):  
Alfredo Takashi Suzuki ◽  
Jorge Henrique Sales ◽  
Luis Alberto Soriano
Keyword(s):  
Zero Mode ◽  
Light Front ◽  
Electromagnetic Current ◽  
Mode Effect

scholarly journals Zero Mode Effect Generalization for the Electromagnetic Current in the Light Front: Fermion Case

2014 ◽  
Vol 56 (6-9) ◽  
pp. 599-605
Author(s):  
Alfredo Takashi Suzuki ◽  
Jorge Henrique Sales ◽  
Gislan S. Santos
Keyword(s):  
Zero Mode ◽  
Light Front ◽  
Electromagnetic Current ◽  
Mode Effect

scholarly journals Light-Front Zero-Mode Issue on the Vector Meson Decay Constant

2014 ◽  
Vol 55 (5-7) ◽  
pp. 435-440 ◽  
Author(s):  
Ho-Meoyng Choi ◽  
Chueng-Ryong Ji
Keyword(s):  
Vector Meson ◽  
Decay Constant ◽  
Zero Mode ◽  
Light Front ◽  
Meson Decay

scholarly journals QUANTUM GAUGE BOSON PROPAGATORS IN THE LIGHT FRONT

2004 ◽  
Vol 19 (38) ◽  
pp. 2831-2844 ◽  
Author(s):  
A. T. SUZUKI ◽  
J. H. O. SALES
Keyword(s):  
Gauge Boson ◽  
Degrees Of Freedom ◽  
Zero Mode ◽  
Light Front ◽  
Gauge Fields ◽  
Algebraic Condition ◽  
Constant Vector ◽  
Gauge Bosons ◽  
Zero Modes ◽  
Boson Propagator

Gauge fields in the light front are traditionally addressed via the employment of an algebraic condition n·A=0 in the Lagrangian density, where Aμ is the gauge field (Abelian or non-Abelian) and nμ is the external, light-like, constant vector which defines the gauge proper. However, this condition though necessary is not sufficient to fix the gauge completely; there still remains a residual gauge freedom that must be addressed appropriately. To do this, we need to define the condition (n·A)(∂·A)=0 with n·A=0=∂·A. The implementation of this condition in the theory gives rise to a gauge boson propagator (in momentum space) leading to conspicuous nonlocal singularities of the type (k·n)-α where α=1,2. These singularities must be conveniently treated, and by convenient we mean not only mathemathically well-defined but physically sound and meaningful as well. In calculating such a propagator for one and two noncovariant gauge bosons those singularities demand from the outset the use of a prescription such as the Mandelstam–Leibbrandt (ML) one. We show that the implementation of the ML prescription does not remove certain pathologies associated with zero modes. However we present a causal, singularity-softening prescription and show how to keep causality from being broken without the zero mode nuisance and letting only the propagation of physical degrees of freedom.

scholarly journals Light-front projection of spin-1 electromagnetic current and zero-modes

2012 ◽  
Vol 708 (1-2) ◽  
pp. 87-92 ◽  
Author(s):  
J.P.B.C. de Melo ◽  
T. Frederico
Keyword(s):  
Light Front ◽  
Electromagnetic Current ◽  
Zero Modes
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