Removable singularities in coupled yang-mills-dirac fields

1987 ◽  
Vol 12 (9) ◽  
pp. 1029-1070 ◽  
Author(s):  
Thomas H. Otway
Keyword(s):  
Yang Mills ◽  
Dirac Fields ◽  
Removable Singularities

scholarly journals Yang-Mills and Dirac fields in a bag, constraints and reduction

1996 ◽  
Vol 176 (1) ◽  
pp. 95-115 ◽  
Author(s):  
Jędrzej Śniatycki ◽  
Günter Schwarz ◽  
Larry Bates
Keyword(s):  
Yang Mills ◽  
Dirac Fields

Twistor description of classical Yang-Mills-Dirac fields

1980 ◽  
Vol 95 (3-4) ◽  
pp. 405-408 ◽  
Author(s):  
G.M. Henkin ◽  
Yu.I. Manin
Keyword(s):  
Yang Mills ◽  
Dirac Fields ◽  
Twistor Description

scholarly journals f(R) GRAVITY WITH TORSION: A GEOMETRIC APPROACH WITHIN THE $\mathcal{J}$-BUNDLES FRAMEWORK

2008 ◽  
Vol 05 (05) ◽  
pp. 765-788 ◽  
Author(s):  
S. CAPOZZIELLO ◽  
R. CIANCI ◽  
C. STORNAIOLO ◽  
S. VIGNOLO
Keyword(s):  
Conservation Laws ◽  
Perfect Fluid ◽  
Geometric Approach ◽  
Empty Space ◽  
Field Equations ◽  
Jet Bundles ◽  
Yang Mills ◽  
Dirac Fields ◽  
Theories Of Gravity ◽  
Curvature Tensors

We discuss the f(R)-theories of gravity with torsion in the framework of [Formula: see text]-bundles. Such an approach is particularly useful since the components of the torsion and curvature tensors can be chosen as fiber [Formula: see text]-coordinates on the bundles and then the symmetries and the conservation laws of the theory can be easily achieved. Field equations of f(R)-gravity are studied in empty space and in presence of various forms of matter as Dirac fields, Yang–Mills fields and spin perfect fluid. Such fields enlarge the jet bundles framework and characterize the dynamics. Finally we give some cosmological applications and discuss the relations between f(R)-gravity and scalar-tensor theories.

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