CERN Accelerating science

Contents of the Two Photon chapter for LoI

Date: Tue, 22 Oct 1996

Dear Colleagues,
Let me propose the following content of the two photon chapter for LoI. Any proposals, comments, corrections and objections are wellcome.

    With best regards,  22.10.1996
 
                     Serguei Sadovsky

                        Protvino

Two photon physics (short subsection in the LoI introduction).

Two Photon Chapter

1. Two photon processes.
   1. Effective gg luminosities for Pb-Pb, Ca-Ca and pp collisions.
   2. The main features of two photon processes in heavy ion collisions.
      1. The process classification.
      2. Processes with exitation of colliding nuclei.
      3. Coherent processes.
   3. Competition with LEP-II and other expected gg-facilitis.
      1. Two photon run scenarios with FELIX.
      2. The integrated gg-luminosities for different ion spices and different mass intervals of the gg-system.
      3. The gg-processes and the gg-mass regions of the FELIX priorities.
   4. Two photon trigger.
      1. Event rate of hadronic events.
      2. Event rate of two photon events.
      3. Requirements to the trigger level for two photon processes selection in collisions of the different ion spices.
   5. The main tags and cross sections of the selected processes.
      1. Lepton pairs (mu+mu-, tau+tau-) production as calibration processes and QED test.
      2. Light quark spectroscopy including resonances, dimesons, dibarions (diquarks inside barions) as well as hybrids, multi quark states and other QCD exotics.
      3. Production of heavy flavours (quarkonia, mesons, dimesons and dibarions, diqurks inside heavy quark barions).
      4. Quark jets production in gg-processes, structure functions of photon.
      5. Heavy particle production (W+W-, Higgs, supersymmetric particles: charginos, sleptons).
      6. Exotic objects and anomalous events.
2. Overview of the FELIX detectors as the subdetectors of two photon facility on the base of FELIX (energy and coordinate resolution, energy threshold, momentum resolution, timing characteritics of the detectors, triggerring characteristics).
   1. Tracking. (Forward, Central, Very Forward)
   2. Particle identification.
   3. EM-calorimetrs. (Forward, Central, Very Forward)
   4. Hadron calorimeters. (Forward, Central, Very Forward)
   5. Zero Degree Calorimeters. (EM-calorimeter, Hadron calorimeter)
3. Generators of the two photon processes.
   1. Minimum bias generators.
      1. PHOJET
      2. TPHIC
   2. Generation of specific processes.
   3. General topology of the minimum bias two photon events in comparision with minimum bias hadronic events (photon and charge particle multiplisity distribution, energy and rapidity distribution for secondary particles).
4. FELIX potencial in two photon physics (two photon physics performance).
   1. Two photon trigger efficiency for different ion spices.
   2. General features of the two photon event detection (Pt-resolution, and gg-mass resolution, detection efficiency of multi particle events, differencial efficiencies over the rapidity and gg-mass for selected processes).
   3. Detection efficiency, background level, event number and physics profit for selected two photon processes.
      1. Detection and identification of two charged particle events (mu+mu-, pi+pi-, K+K-, ppbar)
      2. Detection of the neutral final states (pi0-pi0, Eta'Eta',...)
      3. Double barion events in charged mode: Delta-DeltaBar, Omega-OmegaBar, Lambda-LambdaBar, LambdaC-LambdaCBar.
      4. Detection of the heavy qurkonia production: Eta', EtaC, Xi_C0, Xi_C2, EtaB, ...
      5. Neutral Higgs and pair of charged Higgs
      6. W+W- events and pair of charginos
      7. Pair of sleptons
5. Conclusion of the two photon section