ar X iv : h ep - p h / 00 01 12 7 v 1 1 4 Ja n 20 00 Constraints on the Gluon Density from Lepton Pair Production

ar X iv : h ep - p h / 99 01 28 3 v 1 1 2 Ja n 19 99 TPR - 99 - 02 Diffractive charged meson pair production

We investigate the possibility to measure the nonforward gluon distribution function by means of diffractively produced π+π− and K+K− pairs in polarized lepton nucleon scattering. The resulting cross sections are sizable and are dominated by the gluonic contribution. We find large spin asymmetries, both for π+π− and for K+K− pairs. PACS. 12.38.-t, 13.60.-r, 13.60.Le

ar X iv : h ep - p h / 99 06 40 2 v 1 1 7 Ju n 19 99 1 Low mass lepton pair production in hadron collisions

The hadroproduction of lepton pairs with mass Q and transverse momentum QT can be described in pertur-bative QCD by the same partonic subprocesses as prompt photon production. We demonstrate that, like prompt photon production, lepton pair production is dominated by quark-gluon scattering in the region QT > Q/2. This leads to sensitivity to the gluon density in kinematical regimes that are acce...

ar X iv : h ep - p h / 04 03 21 2 v 1 1 9 M ar 2 00 4 Lepton flavor violation in the SUSY seesaw model : an update

We present an update of previous work on charged lepton flavor violation (LFV) in the seesaw model. The most recent neutrino data fits and post WMAP mSUGRA benchmark scenarios are used as input. In this framework we compare the sensitivity of rare radiative decays on the right-handed Ma-jorana mass scale M R with the reach in slepton-pair production at a future linear collider.

ar X iv : h ep - p h / 01 01 12 2 v 2 2 1 Ja n 20 01

In the coming years, experiments underway will increase the sensitivity to charged lepton flavor violation by four orders of magnitude. These experiments will stringently probe weak scale physics. I review the status of global symmetries in the standard model and present several well-motivated models that predict observable lepton flavor violation. Finally, I describe what we might learn from f...

ar X iv : h ep - t h / 03 01 12 7 v 1 1 7 Ja n 20 03 Supersymmetry in Spaces of Constant Curvature