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Diffraction at the Tevatron and the LHC

C. Royon

Abstract

In these lectures, we present and discuss the most recent results on inclusive diffraction at the Tevatron collider and give the prospects at the LHC. We also describe the search for exclusive events at the Tevatron. Of special interest is the exclusive production of Higgs boson and heavy objects ($W$, top, stop pairs) at the LHC which will require precise measurements and analyses of inclusive and exclusive diffraction to constrain further the gluon density in the pomeron. At the end of these lectures, we describe the projects to install forward detectors at the LHC to fulfil these measurements.

Diffraction at the Tevatron and the LHC

Abstract

In these lectures, we present and discuss the most recent results on inclusive diffraction at the Tevatron collider and give the prospects at the LHC. We also describe the search for exclusive events at the Tevatron. Of special interest is the exclusive production of Higgs boson and heavy objects (, top, stop pairs) at the LHC which will require precise measurements and analyses of inclusive and exclusive diffraction to constrain further the gluon density in the pomeron. At the end of these lectures, we describe the projects to install forward detectors at the LHC to fulfil these measurements.

Paper Structure

This paper contains 27 sections, 3 equations, 24 figures, 1 table.

Table of Contents

  1. Experimental methods to select diffractive events at the Tevatron and the LHC
  2. The rapidity gap method
  3. Proton tagging
  4. Diffractive kinematical variables
  5. Results on inclusive diffraction from the Tevatron
  6. Diffractive events at the Tevatron
  7. From HERA to Tevatron
  8. Factorisation or factorisation breaking at the Tevatron?
  9. Possibility of survival probablity measurements at DØ
  10. Diffractive exclusive event production
  11. Interest of exclusive events
  12. Search for exclusive events in $\chi_c$ production
  13. Search for exclusive events in the diphoton channel
  14. Search for exclusive events using the dijet mass fraction at the Tevatron
  15. Search for exclusive events at the LHC
  16. ...and 12 more sections

Figures (24)

  • Figure 1: "Usual" and diffractive events in the H1 experiment.
  • Figure 2: Scheme of a roman pot detector.
  • Figure 3: Extraction of the parton densities in the pomeron using a DGLAP NLO fit (H1 collaboration).
  • Figure 4: Test of factorisation within CDF data alone.
  • Figure 5: Comparison between the CDF measurement of diffractive structure function (black points) with the expectation of the H1 QCD fits (red full line).
  • ...and 19 more figures