POLARIZED PROTONS AND PARITY VIOLATING ASYMMETRIES

Parity violating asymmetries in the scattering of transversely polarized protons.

Parity Violating Asymmetries at Future Lepton Colliders

The International Linear Collider (ILC) will have tremendous discovery potential. Combining high energy and high luminosity capabilities, it will thoroughly explore e+e− collisions from √ s ≈ 500 GeV to 1.5 TeV. In addition, the possibility exists to run at lower energies, such as the Z pole ∼ 91 GeV, while retaining relatively high luminosity. There, one could carry out very precise measuremen...

Gluon Contributions to Parity-Violating Asymmetries in Polarized Proton-Proton Scattering

We report on a calculation of one-loop weak corrections to polarized quark-gluon scattering and the corresponding crossed channels. Such contributions are suppressed formally by one power of αs relative to W− or Z−mediated quark-quark scattering, but would enable the spin asymmetry of the gluon distribution to contribute to parity-violating asymmetries that will soon be investigated in polarize...

Parity Violating Asymmetries in Top Pair Production at Hadron Colliders

We study loop-induced parity violating asymmetries in the strong production of polarized top quark pairs at pp and pp̄ colliders. The electroweak O(α) corrections to the helicity amplitudes of qq̄ → tt̄ and gg → tt̄ are evaluated in a two Higgs doublet model (2HDM) and the minimal supersymmetric standard model (MSSM). While observables in top quark pair production receive little contribution from s...

0 Contrasting N → ∆ and N → N parity - violating asymmetries in nuclei

Several perspectives that can be opened by studying the electroexcitation of the delta via parity-violating electron scattering from nuclei are examined, working within the context of the relativistic Fermi gas model. A strong enhancement of the left-right asymmetry in the delta sector compared with that in the quasi-elastic regime is found and the potential to find clear signatures for the axi...