Non-Diffractive and Diffractive Mechanism in Multi-Particle Production Process

- Production in Diffractive DIS

We calculate the cross section for q ¯ qg-production in diffractive DIS with finite fermion masses and zero momentum transfer. The calculation is done in the leading log(1/x P) approximation and is valid for the region of high diffractive masses (small β). We apply our cross section formula to diffractive charm production at HERA: in a Monte-Carlo-Simulation of diffractive D * ± meson productio...

Particle Production Ratios in the Diffractive Excitation Model

Ratios of the invariant distributions of produced particles, R@+/a), R&n) > R(K-/n) , and R(K’/p), have been calculated in the diffractive excitation model. Two free parameters are used to adjust the relative normalization. The shapes of the ratios as functions of x are essentially independent of any arbitrary parameters. The results agree with the data very well. (Submitted to Physics Letters)...

Diffractive Higgs production

Instrumenting the LHC to measure the outgoing protons in the process pp → p+X + p opens up new possibilities for physics studies in the Standard Model and beyond. In this talk I first present an overview of the underlying QCD calculation and its uncertainties. I then move on to present a variety of new physics scenarios which one would want to explore via this unique channel. There is a short d...

Diffractive Higgs production: theory

We review the calculation for Higgs production via the exclusive reaction pp → p + H + p. In the first part we review in some detail the calculation of the Durham group and emphasise the main areas of uncertainty. Afterwards, we comment upon other calculations.

Diffractive Jet Production in Dis