Using the hadronic content of the photon to search for new physics

by Stephen GODFREY (Carleton University, Ottawa)

Friday 11 May 2001, 14:00 → 15:00 Europe/Zurich

TH Auditorium (CERN)

Measuring the hadronic content of the photon has been promoted as a clean test of QCD. However, the photon can also be regarded as a broadband quark-gluon beam which may have an important role to play in the search for physics beyond the standard model at future high energy e+e- Colliders. I will begin with a short discussion of photon structure functions and parton luminosities. I will then survey searches for new physics using the hadronic content of the photon, starting with Leptoquark searches and identification as has been exploited by the LEP collaborations. I will then describe how resolved photon contributions can contribute to our knowledge of the Higgs sector in gamma-gamma collisions. This is followed by W' searches in e-gamma collisions. I will finish with some comments on other possibilities for this approach.