Wednesday 22 June 2011

Speaker:   Richard Wigmans (Texas Tech University & INFN Pisa)

Title:   "DREAM - towards high-resolution jet spectroscopy".

Abstract:

In the past quarter century, calorimeters have evolved as the particle detectors of 
choice in experiments at the energy frontier. However, development of the full potential
of these detectors, which are based on total absorption of the particles to be measured,
is hampered by the fact that electrons and photons generated in the absorption process
produce significantly larger signals than equally energetic protons and pions. This
phenomenon, commonly referred to as non-compensation, is responsible for poor energy
resolution, a non-linear response, and a non-Gaussian response function for hadrons and
jets.

Dual-Readout calorimetry offers a solution for these problems. The DREAM Collaboration
is exploring the limits of the possibilities offered by this technique, by systematically
eliminating the limiting factors, one after the other. Powerful tools in this context
are the simultaneous measurement of scintillation light and Cerenkov light generated
in the absorption process, and a detailed measurement of the time structure of the
signals. As a result, calorimetric measurements of hadrons and jets at the 1% precision
level now seem to be within reach.

In this talk, the latest results of this generic detector R&D project will be presented.