Dear colleagues,

   We are planning to have an (informal) atmospheric neutrino
flux meeting on Feb.20 and 21(morning) at ICRR @Kashiwa.
The purpose of the meeting is to discuss the details of the
flux calculation and to understand the uncertainties of the
flux.

   Enclosed please find the preliminary program of the
meeting. If you are interested in the meeting, please
participate in this meeting. The information of the Kashiwa
campus can be found at: http://www.icrr.u-tokyo.ac.jp/

Best regards, Takaaki Kajita and Paolo Lipari

Dates: Feb.20 and 21(morning)
Place: Large seminar room of ICRR.

Feb.20 (9:30 - )

* Introductory remark                  (T.Kajita)

Session I: Atmospheric neutrino data

* Summary of the Super-Kamiokande atmospheric
  neutrino data                         (Y.Obayashi)

* nu_mu <-> nu_tau versus nu_mu <-> nu_sterile
  and a search for CC nu_tau events     (T.Toshito)

* Discussions

Lunch (Lunch can be after the 1st talk of the next session
       depending on the actual schedule.)

Session II: Cosmic ray flux data

* Cosmic ray p, He and muon fluxes     (T.Sanuki)

* Secondary gamma-ray flux             (S.Torii)

* Comments & Discussions

Coffee
Session III: Hadronic interaction models

* The Bartol code                      (T.K.Gaisser)

* The FLUKA code                       (G.Battistoni)

* Models used in HKKM calculation      (K.Kasahara)

* Comments & Discussions


Feb.21 (9:30 - )

Session IV: Atmospheric neutrino flux based
            on 3-dimensional calculations

* FLUKA flux                           (G.Battistoni)

* Bartol flux                          (T.K.Gaisser)

* HKKM flux                            (M.Honda)

* Sources of uncertainties             (P.Lipari)

* Discussion on the future atmospheric neutrino data

==> Since we must finish the meeting before ~12:30,
we may have to shift one or two talks to the 1st day.

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