ar X iv : h ep - e x / 99 07 06 5 v 1 3 0 Ju l 1 99 9 SLAC - PUB - 8199 Revised July 1999 Direct Measurement of A c using Inclusive Charm

ar X iv : h ep - e x / 99 06 02 8 v 1 1 6 Ju n 19 99 1 Future Polarised DIS Fixed Target Experiments

New experiments in polarised deep inelastic scattering will mainly concentrate on the measurement of semi-inclusive asymmetries. Especially, the upgraded HERMES experiment at DESY and the newly build COMPASS experiment at CERN will investigate the gluon polarisation via open charm and high pT hadron pair production , study in detail the flavour decomposition of the quark helicity distributions ...

ar X iv : h ep - p h / 99 07 34 7 v 1 1 4 Ju l 1 99 9 SLAC – PUB – 8197 July 1999 Compton Scattering at the NLC and Large Extra Dimensions ∗

We study Compton scattering, γ e → γ e, in the context of the recent proposal for Weak Scale Quantum Gravity (WSQG) with large extra dimensions. It is shown that, with an ultraviolet cutoff M S ∼ 1 TeV for the effective gravity theory, the cross section for this process at the Next Linear Collider (NLC) deviates from the prediction of the Standard Model significantly. Our results suggest that, ...

ar X iv : h ep - p h / 99 04 28 0 v 1 8 A pr 1 99 9 SLAC - PUB - 8095 April 1999 Odderon - Pomeron Interference ∗

We show that the asymmetry in the fractional energy of charm versus an-ticharm jets produced in high energy diffractive photoproduction is sensitive to the interference of the Odderon (C = −) and Pomeron (C = +) exchange amplitudes in QCD. We predict the dynamical shape of the asymmetry in a simple model and estimate its magnitude to be of the order 15% using constraints from proton-proton vs. ...

ar X iv : h ep - p h / 99 04 28 0 v 2 6 J ul 1 99 9 SLAC - PUB - 8095 April 1999

We show that the asymmetry in the fractional energy of charm versus an-ticharm jets produced in high energy diffractive photoproduction is sensitive to the interference of the Odderon (C = −) and Pomeron (C = +) exchange amplitudes in QCD. We predict the dynamical shape of the asymmetry in a simple model and estimate its magnitude to be of the order 15% using an Odd-eron coupling to the proton ...

ar X iv : h ep - p h / 99 07 30 0 v 1 1 2 Ju l 1 99 9 The hypothesis of a real Cabibbo