＜＜＜「@」を「__AT__」に置き換えています＞＞＞

Date: Wed, 15 Nov 2023 12:33:19 +0900 (JST)
From: Yoritaka Iwata
To: ntj-l__AT__yukawa.kyoto-u.ac.jp, sg-l__AT__yukawa.kyoto-u.ac.jp
Subject: [Sg-l:8002] 国際ワークショップ 「Theoretical and Experimental Approaches for Nuclear Matrix Elements of Double Beta Decays」のご案内

皆さま

大阪大学核物理研究センターと新学術領域「地下から解き明かす宇宙の歴史と物質の進化」（新学術「地下宇宙」）の共催で、国際ワークショップ
「Theoretical and Experimental Approaches for Nuclear Matrix Elements of Double Beta Decays」を開催します。

研究会Webページ
https://www.rcnp.osaka-u.ac.jp/~dbd/WS/nme23/index.html

日時：2023年12月21日(木)～2022年12月22日(金)
会場：大阪大学核物理研究センター＋オンライン
共催：大阪大学核物理研究センター
　　　新学術領域「地下から解き明かす宇宙の歴史と物質の進化」

上記Webページにて、参加登録および講演申し込みを受け付けています。
また、予算に限りはありますが、若手研究者には旅費のサポートがあります。
サポートが必要な方は下記世話人宛にご連絡ください。

皆さまのご参加をお待ちしております。

研究会世話人　 nme__AT__rcnp.osaka-u.ac.jp
吉田斉(大阪大学大学院理学研究科)
梅原さおり(大阪大学RCNP)
嶋達志(大阪大学RCNP)
岩田順敬（大阪経済法科大学国際学部）
寺崎順（チェコ工科大学プラハ）
井上邦雄（東北大学ニュートリノ科学研究センター）

==================================================
Dear Colleagues,

The international workshop on the theoretical and experimental approaches for nuclear
matrix elements of double-β decay will be held on December 21 and 22, 2023 at the Research
Center for Nuclear Physics (RCNP), Osaka University, Japan.
The discovery of the neutrinoless double-β (0vbb) decay gives the proof of the existence of
a Majorana neutrino, which is a decisive clue to solving the mystery of the birth of the
matter-prevailing universe. The 0vbb decay is also quite important for determining the
ordering structure of the neutrino eigen masses. In the recent future plans for the 0vbb
decay experiments, the searches for the decay in the inverted ordering region (the mass of
10-20 meV) and the normal ordering region (the mass of several meV) are proposed. The
prediction of the nuclear matrix element (NME) is necessary for determining the effective
neutrino mass from the measured half-life of the decay. This is a challenging task for
theoretical nuclear physics because the  0vbb  decay is a qualitatively unprecedented and
extremely rare phenomenon. Currently, the calculated NMEs are distributed in a broad ratio
range of 2?3.
The aim of this workshop is to improve the accuracy of the theoretical NME calculation.
Close cooperation between the experimentalists and the theorists is necessary to achieve
this aim. A question is what measurements can be important inputs to the NME calculation.
The discussions are expected on the requests and suggestions for new experimental
measurements.
The discussion will also be made on the measurement results of the phenomena related to
the  0vbb decay as the precise measurement of the half-life of the  2vbb decay, the double
Gamow-Teller transition strength using the double-charge exchange reaction, and other
physical quantities for obtaining important insight through the measurements of the nuclear
reactions using accelerators.

Date:
Decemver 21 (Thu.)
December 22 (Fri.)

Conference Site
The workshop site is RCNP. Further information is available in the following web site:
https://www.rcnp.osaka-u.ac.jp/~dbd/WS/nme23/index.html

Call for Contributions
Abstracts of contributed papers will be accepted through the workshop registration page. Please visit the following URL;
https://www.rcnp.osaka-u.ac.jp/~dbd/WS/nme23/index.html?InputContents=Reg

We look forward to seeing you in Osaka in December 2023.

Best regards,
Organizers