Zobrazeno 1 - 10
of 305
pro vyhledávání: '"Soldati, R."'
This is a review of some elementary properties of Dirac, Weyl and Majorana spinors in 4d. We focus in particular on the differences between massless Dirac and Majorana fermions, on one side, and Weyl fermions, on the other. We review in detail the de
Externí odkaz:
http://arxiv.org/abs/2006.04546
Publikováno v:
Phys. Rev. D 95, 076020 (2017)
The transition between a Minkowski space region and a parity breaking medium domain is thoroughly discussed. The requirement of continuity of the field operator content across the separating boundary of the two domains leads to Bogolyubov transformat
Externí odkaz:
http://arxiv.org/abs/1611.03903
Autor:
Soldati, R., Zanelli, C., Cavani, G., Battaglioli, L., Guarini, G., Melandri, C., Piancastelli, A., Dondi, M.
Publikováno v:
In Powder Technology September 2020 374:111-120
The problem of propagation of photons and massive vector mesons in the presence of Lorenz and CPT invariance violating medium is studied when the parity-odd medium is bounded by a hyperplane separating it from the vacuum. The solutions in both half-s
Externí odkaz:
http://arxiv.org/abs/1109.3440
Publikováno v:
Int.J.Mod.Phys.A25:3271-3306,2010
We consider QED in a constant axial vector background (\AE ther). Further Lorentz invariance violations (LIV) might occur owing to radiative corrections. The phenomenology of this model is studied, clarifying issues related to the various regularizat
Externí odkaz:
http://arxiv.org/abs/0904.3557
Publikováno v:
Phys.Lett.B651:306-312,2007
We outline the evaluation of the cosmological constant in the framework of the standard field-theoretical treatment of vacuum energy and discuss the relation between the vacuum energy problem and the gauge-group spontaneous symmetry breaking. We sugg
Externí odkaz:
http://arxiv.org/abs/0704.1436
Publikováno v:
Phys.Lett.B639:586-590,2006
We show for the first time that the induced parity--even Lorentz invariance violation can be unambiguously calculated in the physically justified and minimally broken dimensional regularization scheme, suitably tailored for a spontaneous Lorentz symm
Externí odkaz:
http://arxiv.org/abs/hep-th/0604164
Publikováno v:
JHEP 0507:003,2005
We present a non-compact (4 + 1) dimensional model with a local strong four-fermion interaction supplementing it with gravity. In the strong coupling regime it reveals the spontaneous translational symmetry breaking which eventually leads to the form
Externí odkaz:
http://arxiv.org/abs/hep-th/0503115
Publikováno v:
J. Phys. A: Math. Gen. 36, 12065 (2003)
We investigate the time evolution of the decay (or ionization) probability of a D-dimensional model atom (D=1,2,3) in the presence of a uniform (i.e., static and homogeneous) background field. The model atom consists in a non-relativistic point parti
Externí odkaz:
http://arxiv.org/abs/quant-ph/0307232
Publikováno v:
JHEP 0307 (2003) 063
A possible explanation for the appearance of light fermions and Higgs bosons on the four-dimensional domain wall is proposed. The mechanism of light particle trapping is accounted for by a strong self-interaction of five-dimensional pre-quarks. We ob
Externí odkaz:
http://arxiv.org/abs/hep-ph/0305271