LABORATORI NAZIONALI DEL GRAN SASSO

THEORETICAL SEMINAR ANNOUNCEMENT

On December 20, 2006 at 14:30, S. Ostapchenko from Forschungszentrum Karlsruhe, Germany will give a seminar entitled:

“High energy cosmic ray data and hadronic interaction models: how much is yet uncertain?”

Abstract:

The description of high energy hadronic interactions in the QGSJET-II model is discussed in some detail in comparison with alternative approaches and the key issue of model uncertainty of cosmic ray data interpretation is addressed. In particular, a special attention is paid to the predicted energy dependence of hadronic cross sections and of the so-called inelasticity in connection to extensive air shower (EAS) elongation rate. Also general constraints on the EAS muon content are discussed, stressing the role of direct muon measurements at and above the 'knee' energies.

(“B. Pontecorvo” room)