منابع مشابه
Cosmological Constraints on Unparticles
We study the cosmological constraints on unparticle interactions and the temperature of the Universe for an unparticle sector with dimensional transmutation scale ΛU > ∼ 1 TeV. By considering thermal background quark decay to unparticles via a scalar operator of dimension dU , we show that the condition that the Universe is not dominated by unparticles at nucleosynthesis imposes a lower bound o...
متن کاملComments on gauge unparticles
A field model for a quark and an antiquark binding is described. Quarks interact via a gauge unparticle (”ungluons”). The model is formulated in terms of Lagrangian which features the source field S(x) which becomes a local pseudo-Goldstone field of conformal symmetry the pseudodilaton mode and from which the gauge non-primary unparticle field is derived by Bμ(x) ∼ ∂μS(x). Because the conformal...
متن کاملA note on Infraparticles and Unparticles
The observed astrophysical phenomenon of dark matter has generated new interest in the problem of whether the principles underlying QFT are consistent with invisibility/inertness of energy-momentum carrying ”stuff” as e.g. ”unparticles”. We show that the 2-dim. model which has been used to illustrate the meaning of unparticles belong without exception to the class of former infraparticles. In d...
متن کاملOn the RS2 realization of unparticles
To facilitate the study of the unparticle scenario it is very desirable to have a treatable model realizing it in four dimensions. Motivated by the general idea of the AdS/CFT correspondence, we consider a simple construction: the Randall-Sundrum 2 (single brane) setup with the Standard Model fields on the brane and a massive vector field in the warped bulk. We show that in this model the known...
متن کاملUnparticles and Muon Decay
Recently Georgi has discussed the possible existence of ‘Unparticles’ describable by operators having non-integral scaling dimensions. With the interaction of these with the Standard Model (SM) particles being constrained only by gauge and Lorentz symmetries, it affords a new source for lepton flavour violation. Current and future muon decay experiments are shown to be very sensitive to such sc...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2013
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.88.116003