********<< International Workshop on Low Energy Solar Neutrinos >>*******

CRC会員の皆さま、

以下の様に``International Workshop on Low Energy Solar Neutrinos''を
２０００年１２月４日 と ５日 に開催致します。

参加を希望される方は、当研究会のホームページ
  http://www-sk.icrr.u-tokyo.ac.jp/neutlowe を通じて参加登録をお願い致します。
また、国内旅費の補助が必要な方は
  lownu [at] suketto.icrr.u-tokyo.ac.jp にご連絡ください。
尚、当研究会に引き続き
「ニュートリノ振動とその起源の解明」第２回研究会 も開催されますので
  http://www-sk.icrr.u-tokyo.ac.jp/noon2000  を併せてご覧下さい。

                研究会世話人
                      鈴木洋一郎、中畑雅行、森山 茂栄 ; 東京大学宇宙線研究所
                      J.N.Bahcall ;  Institute for Advanced Study

       ============================================================
       ||  International Workshop on Low Energy Solar Neutrinos  ||
       ============================================================

On December 4 and 5, 2000, we will have a two-day workshop on the detection of
the solar neutrinos below 1 MeV. 
The workshop will be held at Sanjyo-hall in the University of Tokyo, Tokyo,
Japan. The purpose of this workshop is to discuss all aspects of low energy
solar neutrino experiments, including problems and techniques.
 
The previous and currently running solar neutrino experiments observed deficit
of solar neutrino flux and they strongly suggest neutrino oscillations. Low 
energy solar neutrinos are measured only by radiochemical experiments so far 
and we know only the integral flux of those neutrinos. 
The energy spectrum of solar neutrinos was measured only for 8B neutrinos up to
now and the spectrum measurement below 1MeV should supply important information
. pp and 7Be neutrinos are main source of low energy solar neutrinos and more 
than 97% of total solar neutrino flux is predicted to lie below 1 MeV. The flux
and spectrum of pp neutrinos are predicted precisely by the standard solar 
model. The energy spectrum and time dependence of the survival probabilites of 
those neutrinos should provide crucial information on neutrino oscillations. 
In order to make detectors for the low energy solar neutrinos, new techniques 
must be devised to reduce radioactive backgrounds and identify solar neutrino 
signals. The development of the techniques requires world wide cooperation of 
researchers interested in neutrino physics and in neutrino astrophysics.

Purpose of the Workshop 
=======================
As a pre-conference of Neutrino 2000, the first Low Energy Solar Neutrino 
(LowNu) workshop was held at Sudbury. There were presentations from groups
constructing or planning low energy solar neutrino experiments----BOREXINO, 
KamLAND, HERON, CLEAN, Xenon, HELLAZ, LENS, GSO, and MOON.  Following the 1st 
LowNu workshop, we will discuss more about low energy solar neutrinos in order 
to make low energy real time solar neutrino detectors possible.
The subjects of this workshop include:
 1) physics goals of the precise measurement of the low energy solar neutrinos,
 2) the progress from the constructing and planned experiments,
 3) common technical problems related to the experiments, such as cleaning 
    the detector materials, internal/external background reduction,
 4) neutrino calibration sources,
 5) isotope separation, and
 6) interconnection between the low energy solar neutrino experiments to double
    beta decay and dark matter experiments.

Date of the workshop ; December 4 and 5, 2000
====================

Workshop Site
=============
Workshop site is Sanjyo-hall in Hongo-Campus in Univ. of Tokyo, Tokyo, Japan.
The nearest international airport is Narita airport and the campus is about one
hour by train from Narita. More details about the transportation will be found 
in the following Web site :  http://www-sk.icrr.u-tokyo.ac.jp/neutlowe 

Registration/Accommodation
==========================
Registration for the workshop and reservation of accommodations should be done 
via the workshop home page :  http://www-sk.icrr.u-tokyo.ac.jp/neutlowe
The number of participants is limited to 100. Please register at your earliest 
convenience.

Joint Workshop
==============
Just after the Low Eenergy Solar Neutrino workshop, we will have another 
international workshop entitled ''Neutrino Oscillations and their Origin'' 
from 6th to 8th December at the same workshop site(Sanjyo-hall in Hongo-Campus 
in Univ. of Tokyo). In this workshop, we will discuss latest results on solar 
neutrinos and atmospheric neutrinos, theoretical analysis on neutrino 
oscillations, and related subjects, such as long baseline experiments, search 
for proton decays and mu->e,gamma decays and etc.  Details of the workshop can 
be found on the website :  http://www-sk.icrr.u-tokyo.ac.jp/noon2000
    
Workshop scientific organizer
=============================
   Y. Suzuki, M. Nakahata and S. Moriyama ;
                 (Kamioka Observatory, ICRR, Univ. of Tokyo),
   J.N.Bahcall ; (Institute for Advanced Study)

Contact
=======
   If you have any questions or comments, please send e-mail to the following 
   address.   E-mail: lownu [at] suketto.icrr.u-tokyo.ac.jp 

International Workshop on Low Energy Solar Neutrinos 
Kamioka Observatory, ICRR, Univ. of Tokyo
Higashi-mozumi, Kamioka-cho, Yoshiki-gun, Gifu, Japan, 506-1205
Tel: +81-578-5-9603,  Fax: +81-578-5-2121
E-mail: lownu [at] suketto.icrr.u-tokyo.ac.jp 
homepage: http://www-sk.icrr.u-tokyo.ac.jp/neutlowe