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11 papers · 2 filters
Searching for an Invisibly Decaying Higgs Boson in E^+E^-, E-Gamma, and Gamma-Gamma Collisions
O. J. P. Eboli, M. C. Gonzalez-Garcia, A. Lopez-Fernandez +2
Higgs bosons can have a substantial ``invisible'' branching ratio in many extensions of the Standard Model, such as models where the Higgs bosons decay predominantly into light or…
One-Loop QCD Mass Effects in the Production of Polarized Bottom and Top Quarks
J. G. K"orner, A. Pilaftsis, M. M. Tung
The analytic expressions for the production cross sections of polarized bottom and top quarks in annihilation are explicitly derived at the one-loop order of strong intera…
The KeV Majoron as Dark Matter Particle
V. Berezinsky, J. W. F. Valle
We consider a very weakly interacting KeV majoron as dark matter particle (DMP), which provides both the critical density and the g…
Universality-Breaking Effects in Leptonic Z Decays
J. Bernabeu, J. Korner, A. Pilaftsis +1
We analyze the possibility of universality violation in diagonal leptonic decays of the boson, in the context of interfamily "see-saw" models. In a minimal extension of the Sta…
Dynamical zeros in neutrino-electron elastic scattering at leading order
J. Segura, J. Bernabéu, F. J. Botella +1
We show the existence of dynamical zeros in the helicity amplitudes for neutrino-electron elastic scattering at lowest order in the standard theory. In particular, the non-…
- conversion in nuclei and Z physics
J. Bernabeu, E. Nardi, D. Tommasini
Together with the existence of new neutral gauge bosons, models based on extended gauge groups (rank ) often predict also new charged fermions. A mixing of the known fermions…