Message-Id: <200109081003.TAA32415@neutrino.kek.jp> To: opc.nuint01 Subject: Minutes of OPC meeting (08/Sep/'01) Date: Sat, 08 Sep 2001 19:03:26 +0900 From: Makoto Sakuda <sakuda@neutrino.kek.jp> Dear OPC members, I note the agreement today in **). There are many things that I did not catch. Please correct. **) Second circular in Web will have a scientific program showing the topics without speaker's names to show the outline of the workshop. (I will announce it to OPC before updating the Web.) (We did not have time to discuss the session length. Now, we may have to think how to arrange all talks in 4 days.) Regards, Makoto Sakuda - - - - ----------------------------------------------------------- 1. Welcome address by S.Yamada (KEK) 2. Objectives and Motivations (Conveners: Sakuda*,Suzuki,Lipari) 1) PRECISE MEASUREMENT OF NEUTRINO OSCILLATION PARAMETERS with LONG-BASELINE ACCELERATOR BEAMS ** 1) Overview --- How much is each neutrino oscillation experiment affected by the systematic errors due to cross sections and nuclear effects? The following talks explain the experment briefly and describe the effect of neutrino-nucleus interactions. (20min ) a) nu-mu->nu-mu and nu-mu->nue at K2K and JHF -- b) nu-mu->nu-mu and nu-mu->nue at MINOS -- ** c) nu-mu->nu-mu and nu-mu->nue at CNGS -- d) nu-mu->nu-tau appearance --- Komatsu (Nagoya) ** e) Measurement of CP violation at Superbeams and neutrino-factory Difference between nu_mu and nu_mu_bar beams should be noted. --- Bernstein or... 2) ATMOSPHERIC NEUTRINOS Determination of neutrino oscillation parameters with atmospheric neutrinos. -- E.Kearns or Kajita/Kaneyuki 3) PROTON DECAYS Prospect of the proton decay experiment and background for proton decay -- Shiozawa (ICRR) or (UNO) 4) ASTROPHYSICS Supernova --- K.Langanke* Leptogenesis --- E. Paschos 5) QCD OR STRONG INTERACTIONS --- Mangano 3. Theoretical Issues of Neutrino-Nucleus Interactions and Nuclear Effects (Conveners: Morfin*, Seki, Lipari, Para) *) What is known in electron-nucleus interactions (e,e') and (e,e'p) about nuclear effects in relation to the corresponding neutrino-nucleus interactions at 0.5 to 10 GeV resgion. 1) NUCLEAR EFFECTS IN ELECTRON-NUCLEUS INTERACTIONS THEORY: V. Pandharipande* - multi-body theory of e-Nucleus interactions T. Thomas (Backup; M. Strikman) - nonP/PQCD look at e-Nucleus int. W. Melnitchouk - Resonance region to DIS, q-hadron duality 2)EXPERIMENT: I. Sick (Backup; R. Milner) - low energy nuclear effects C. Keppel/JLAB (Backup: G. Garvey) - elastic to resonance to DIS nucleon & nucleus 3) PION-ABSORPTION STUDIES R. Redwine - LADS pi absorption experiment results 4) NEUTRINO-NUCLEUS INTERACTIONS INCLUDING NUCLEAR EFFECTS E. Paschos* - Neutrino nucleus interactions and Leptognesis O. Benhar - Final State Interactions in Neutrino Nucleus Scattering J. Marteau - although in MC benchmark session, talk to give the details of physics going into MC (Backup; P. Bernardini - nuclear re-interactions, P. Vogel for sub-GeV presentations) **) It is important to understand the origin of the discrepancy between Marteau's calculation and others. 4. Overview of the existing and new data on neutrino-nucleus interactions and their uncertainties (Conveners: Itow*/Suzuki/Sakuda) *) Specify the accuracy of the cross section measurements and of verifying nuclear effects, even if the measurement is direct or indirect. Review: 1) Nu-nucleus Data and their systematic errors Low energy and DIS -- M.Sakuda J.Morfin i) Quasi-elastic interactions Cross section and MA ii) 1pi production Cross section and MA iii) NC interactions (Elastic and pi production) iv) Total Cross section measurements and Structure fuctions 2) New data on iv) ---- Anatoli Vovenko (IHEP) ** 3) New data from NOMAD --- M.Veltri **) Archive of database of existing neutrino-nucleus interactions -- This is a long term project and we keep it mind. New data: K2K 4) CC (mu + X) 5) CC (mu p + X) 6) NC (pi0) 7) CC (mu-pi0) SK 8) Atomospheric data on NC(pi0)/CC(e) *) Study of the proton decay backgrounds by the measurements / Mu-pi0 study really estimates e-pi0 backgrounds? / Kaon production by neutrino interactions (BEBC?/K2K) 5. Comparison of the benchmark MC and theoretical calculations Conveners: Casper*/Seki/Hayato/H.R.Gallagher **) Casper will discuss with Seki, update the benchmark calculations and propose to the following people a concrete scheme to compare the distributions/calculations before the meeting: Hayato, Gallagher, Zucchelli, Mills, Rubbia ?, Seki/Nakamura, Marteau, Paschos, Lipari ,.... Good communication and coordination before the workshop are important. **) E_nu=0.3-0.5 (low energy) and 5 GeV (high energy) will be included in the benchmarck calculations. i) MC Generators: > It is important that all groups use the same >parameters for the neutrino-nucleon cross sections, for >example, vector and axial form factors. Then, specify which >models or papers they use for nuclear effects (Fermi-gas model etc). 1) NEUT (Hayato) 2) NUANCE (Casper) 3) MINOS/Soudan II (Gallagher) 4) OPERA/NOMAD/DONUT (Piero Zucchelli) ** 5) MiniBooNE (Mills?) 6) A brief summary of MC results ii) Theoretical calculations 7) J. Marteau 8) E. Paschos 9) H. Nakamura ** 10) P. Lipari iii) Summary of comparison of benchmark calculations (MC+Theory)(0.5 hours) ---- Coffee break --- 6. Panel Discussion Conveners: Seki*/Hayato/Casper/H.R.Gallagher Chair, Seki; Associate Chair, D. Casper Panel discussions are carried out by: V. R. Pandharipande, Y.Hayato, K. Kaneyuki, P. Vogel, K. Kubodera, K. Langanke, Resonance/DIS **) Ask G.Garvey/R. Milner to attend. The following six issues are discussed. An leader is assigned for each issue, who is responsible to come up with consensus among the panelers and the audiance on the current status of the issue in 30 minutes. For each topic, the leaders are first to describe his view of the issue briefly (say, 5-10 minutes), and discussions are to follow it. The leaders will be responsible to write a summary for the proceedings. Tentative leaders are listed in parentheses. In MC environment for (nu,l) and (nu,l p), separately: 1) How should Fermi gas model be applied and made realistic? (Vogel) 2) How important nuclear correlations are and how should be incorporated, and how the final-state interactions are best treated? (Pandharipande) 3) How should the pion production be treated? (Hayato/Kaneyuki) As an item which is uncertain but likely to have practical consequences: 4) How vector current is made to be conserved in nuclei, off-shell effects should be treated, and how the axial currents and form factors are modified in nuclei? (Kubodera) ** 5) Resonances/DIS (A.Bodek ?) <-- Morfin General discussion: 6) The universal neutrino-nucleus MC code. (Casper) 7. Future experiments and facilities (Conveners: Para*,Itow,Walter) 1) merits/disadvantages of the existing neutrino beams (K2K, CERN, FNAL-Booster, FNAL-NuMI,....) - Andre Rubbia 2) new near detector of K2K, its physics goals and potential 3) experimentation at JLAB: what are the existing fecilities/experiments, potential for modifications and upgrades, potential for new initiatives 4) near detector station at NuMI: overview, potential for dedicated experiments, constraints.. - Rob Plunkett 5) - 'small ICARUS' detector as potential technique for studies of low energy neutrino interactions - Flavio Cavanna 6) Cross section measurements at CERN AD, Fermilab Debuncher **) Morfin will talk with Para. 8. Summary and Goals for the next NuInt02 //
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