منابع مشابه
CSW rules for a massive scalar
We derive the analog of the Cachazo-Svrček-Witten (CSW) diagrammatic Feynman rules for four dimensional Yang-Mills gauge theory coupled to a massive colored scalar. The mass term is shown to give rise to a new tower of vertices in addition to the CSW vertices for massless scalars in non-supersymmetric theories. The rules are derived directly from an action, once through a canonical transformati...
متن کاملDeriving CSW rules for massive scalar legs and pure Yang-Mills loops
This article provides two complimentary detailed derivations of CachazoSvrček-Witten-style Feynman rules for Yang-Mills gauge theory coupled to a massive coloured scalar as presented in earlier work. These proceed through a direct canonical transformation method on space-time and through a gauge transformation in an action constructed on twistor space. It is shown explicitly that the field tran...
متن کاملThe canonical transformation and massive CSW vertices for MHV-SQCD
Abstract: The similarity of massive CSW scalar vertices and quark vertices can be understood using a kind of light-cone SUSY transformation presented in this paper. We also show that the canonical transformation generating the MHV-SQCD lagrangian, can be fixed by applying this light-cone SUSY transformation to the canonical transformation for MHV-QCD obtained in paper arxiv:0805.0239. Most of t...
متن کاملMassive scalar field near a cosmic string
The ζ function of a massive scalar field near a cosmic string is computed and then employed to find the vacuum fluctuation of the field. The vacuum expectation value of the energy-momentum tensor is also computed using a point-splitting approach. The obtained results could be useful also for the case of self-interacting scalar fields and for the finite-temperature Rindler space theory. PACS num...
متن کاملConfinement from a massive scalar in QCD
A model is introduced with a massive scalar coupling to the Yang–Mills term in four–dimensional gauge theory. It is shown that the resulting potential of colour sources consists of a short range Coulomb interaction and a long range confining part. Far away from the source the scalar vanishes ∼ r while the potential diverges linearly ∼ r. Up to an Nc–dependent factor of order 1 the tension param...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2008
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2008.02.038