1. Reconstruction Of EHE  /  events with stochastic energy loss A quasi-perturbation approach Shigeru Yoshida Chiba University Mons 2003

2. Event Profile – Highly Fluctuated …. CEL Approximation May NOT Work.

3. Stochastic Nature Stochastic Loss Initiating high energy Cascades!

4. A Possible Approach

5. Build a Likelihood

6. How Can We Test? Full Event Generator is not available, yet, plus too complicated for the conceptual study. dE/dX(X) for a simulated event with a KNOWN geometry Cherenkov “PMT” A simple approximation N(L,  c ) ? Give us your suggestions, please !!