Zobrazeno 1 - 10
of 182
pro vyhledávání: '"Ferreira, C. N."'
In this work, we study a $U(1) \times U(1) ^{\prime}-$ model that results from a dimensional reduction of the N=1-D=4 supersymmetric version of the Cremer-Scherk-Kalb-Ramond model with non-minimal coupling to matter. Field truncations are not carried
Externí odkaz:
http://arxiv.org/abs/0906.3019
Publikováno v:
Phys.Rev.D81:024013,2010
We consider a scalar field interaction with a cosmic string configuration in a flat 3-brane. The origin of this field is given by a compactification mechanism in the context of a 5-dimensional Brans-Dicke theory. We use the Cosmic Microwave Backgroun
Externí odkaz:
http://arxiv.org/abs/0904.1890
Publikováno v:
Int.J.Mod.Phys.A24:1537-1540,2009
In this work, we propose a model based on a non-minimal coupling of neutrinos to a Kalb-Ramond field. The latter is taken as a possible source for gravitational radiation. As an immediate illustration of this system, we have studied the case where gr
Externí odkaz:
http://arxiv.org/abs/0812.0078
The main goal of this work is to pursue an investigation of cosmic string configurations focusing on possible consequences of the Lorentz-symmetry breaking by a background vector. We analyze the possibility of cosmic strings as a viable source for fe
Externí odkaz:
http://arxiv.org/abs/0807.4342
Publikováno v:
Phys.Rev.D77:105028,2008
The main goal of this work is to investigate the possibility of finding the supersymmetric version of the U(1)-global string model which behaves as a vortex-superfluid. To describe the superfluid phase, we introduce a Lorentz-symmetry breaking backgr
Externí odkaz:
http://arxiv.org/abs/0704.1935
Publikováno v:
Phys.Rev.D74:033006,2006
We present a model based on the implication of an exceptional E_{6}-GUT symmetry for the anomalous magnetic moment of the muon. We follow a particular chain of breakings with Higgses in the 78 and 351 representations. We analyse the radiative correct
Externí odkaz:
http://arxiv.org/abs/hep-ph/0410373
Publikováno v:
Phys.Rev.D71:044018,2005
In this work, we study the effects of breaking Lorentz symmetry in scalar-tensor theories of gravity taking torsion into account. We show that a space-time with torsion interacting with a Maxwell field by means of a Chern-Simons-like term is able to
Externí odkaz:
http://arxiv.org/abs/hep-th/0405181
Publikováno v:
Phys.Lett. B593 (2004) 203-208
We present the noncommutative extention of the U(N) Cremmer-Scherk-Kalb-Ramond theory, displaying its differential form and gauge structures. The Seiberg-Witten map of the model is also constructed up to $0(\theta^2)$.
Comment: 6 pages
Comment: 6 pages
Externí odkaz:
http://arxiv.org/abs/hep-th/0403088
Publikováno v:
Phys.Rev.D68:124020,2003
In this paper we obtain the space-time generated by a time-like current-carrying superconducting screwed cosmic string(TCSCS). This gravitational field is obtained in a modified scalar-tensor theory in the sense that torsion is taken into account. We
Externí odkaz:
http://arxiv.org/abs/hep-th/0306289
Publikováno v:
Phys.Rev.D67:084011,2003
Measurements of radio emission from distant galaxies and quasars verify that the polarization vectors of these radiations are not randomly oriented as naturally expected. This peculiar phenomenon suggests that the spacetime intervening between the so
Externí odkaz:
http://arxiv.org/abs/hep-th/0210052