167 citations · 197 across the 3 of their papers we have counts for
11 papers
A Note on Unparticle Decays
A. Delgado, J. R. Espinosa, J. M. No +1
The coupling of an unparticle operator O_U to Standard Model particles opens up the possibility of unparticle decays into standard model fields. We study this issue by analyzing th…
Some Cosmological Implications of Hidden Sectors
J. R. Espinosa, T. Konstandin, J. M. No +1
We discuss some cosmological implications of extensions of the Standard Model with hidden sector scalars coupled to the Higgs boson. We put special emphasis on the conformal case,…
Scalar Loops in Little Higgs Models
J. R. Espinosa, J. M. No
Loops of the scalar particles present in Little Higgs models generate radiatively scalar operators that have been overlooked before in Little Higgs analyses. We compute them using…
A Relief to the Supersymmetric Fine Tuning Problem
J. A. Casas, J. R. Espinosa, I. Hidalgo
As is well known, electroweak breaking in the MSSM requires substantial fine-tuning. We explain why this fine tuning problem is abnormally acute, and this allows to envisage possib…
Effective operators and vacuum instability as heralds of new physics
C. P. Burgess, V. Di Clemente, J. R. Espinosa
For a light enough Higgs boson, the effective potential of the Standard Model develops a dangerous instability at some high energy scale, Lambda, signalling the need for new physic…
Theoretical Constraints on the Vacuum Oscillation Solution to the Solar Neutrino Problem
J. A. Casas, J. R. Espinosa, A. Ibarra +1
The vacuum oscillation (VO) solution to the solar anomaly requires an extremely small neutrino mass splitting, Delta m^2_{sol}\leq 10^{-10} eV^2. We study under which circumstances…