## Search

Now showing items 1-10 of 13

#### Constraints on R-parity violating couplings from lepton universality

(American Physical Society, 2000-07-01)

We analyze the one loop corrections to leptonic W and Z decays in an R-parity violating extension to the minimal supersymmetric standard model. We find that lepton universality violation in the Z line-shape variables alone ...

#### Constraints on two-Higgs-doublet models at large tan beta from W and Z decays

(American Physical Society, 2000-09-01)

We study constraints on type-II two-Higgs-doublet models at large tan beta from CERN LEP and SLD Z-pole data and from lepton universality violation in W decay. We perform a global fit and find that, in the context of Z ...

#### Quantum gravity, torsion, parity violation, and all that

(American Physical Society, 2005-11)

We discuss the issue of parity violation in quantum gravity. In particular, we study the coupling of fermionic degrees of freedom in the presence of torsion and the physical meaning of the Immirzi parameter from the viewpoint ...

#### Quark-lepton unification and lepton flavor nonconservation from a TeV-scale seesaw neutrino mass texture

(American Physical Society, 2003-10-01)

In a recent paper we pointed out that the mixing of the light neutrinos with heavy gauge singlet states could reconcile the Z-pole data from e(+)e(-) colliders and the nu(mu) ((nu) over bar (mu)) scattering data from the ...

#### Short distance versus long distance physics: The classical limit of the minimal length uncertainty relation

(American Physical Society, 2002-07-15)

We continue our investigation of the phenomenological implications of the "deformed" commutation relations [(x) over cap (i),(p) over cap (j)]=i (h) over bar[(1+beta(p) over cap (2))delta(ij)+beta'(p) over cap (i)(p) over ...

#### Hydrogen-atom spectrum under a minimal-length hypothesis

(American Physical Society, 2005-07)

The energy spectrum of the Coulomb potential with minimal length commutation relations [X-i, P-j] = ih{delta ij(1 + beta P-2) + beta PiPj} is determined both numerically and perturbatively for arbitrary values of beta'/beta ...

#### Effect of the minimal length uncertainty relation on the density of states and the cosmological constant problem

(American Physical Society, 2002-06-15)

We investigate the effect of the minimal length uncertainty relation, motivated by perturbative string theory, on the density of states in momentum space. The relation is implemented through the modified commutation relation ...

#### Constraints on R-parity violating couplings from CERN LEP and SLAG SLD hadronic observables

(American Physical Society, 2000-07-01)

We analyze the one loop corrections to hadronic Z decays in an R-parity violating extension to the minimal supersymmetric standard model. Performing a global fit to all the hadronic observables at the Z peak, we obtain ...

#### Exact solution of the harmonic oscillator in arbitrary dimensions with minimal length uncertainty relations

(American Physical Society, 2002-06-15)

We determine the energy eigenvalues and eigenfunctions of the harmonic oscillator where the coordinates and momenta are assumed to obey the modified commutation relations [(x) over cap (i),(p) over cap (j)]=i (h) over ...

#### NuTeV anomaly, lepton universality, and nonuniversal neutrino-gauge couplings

(American Physical Society, 2004-12)

In previous studies we found that models with flavor-universal suppression of the neutrino-gauge couplings are compatible with NuTeV and Z-pole data. In this paper we expand our analysis to obtain constraints on flavor-dependent ...