＜＜＜「@」を「__AT__」に置き換えています＞＞＞

From: 本郷優
Date: Mon, 9 Nov 2020 04:59:25 -0600
To: sg-l__AT__yukawa.kyoto-u.ac.jp, ml-np__AT__rcnp.osaka-u.ac.jp,
        ntj-l__AT__yukawa.kyoto-u.ac.jp, statphys__AT__issp.u-tokyo.ac.jp
Subject: [Sg-l:5374] 理研iTHEMS-physicsグループのセミナー案内

みなさま，

イリノイ大学シカゴ校・理研 iTHEMSの本郷です．

理研 iTHEMS physicsグループでは定期的にオンラインセミナーを
開催していますので，その案内メールをお送りいたします．

今週は以下の2つのセミナーが予定されています．
- 白石 直人さん (学習院大学)
  2020.11.10, 16:00~18:10 (JST) iTHEMS math-phys joint seminar
  "Mathematics of thermalization in isolated quantum systems"
- 谷崎 佑弥 さん(京都大学 基礎物理学研究所)
  2020.11.12, 10:30~12:00 (JST)
  "Some idea on quantum tunneling via Lefschetz thimbles"
（アブストラクトなどセミナーの詳細情報は以下のページをご参照ください：
https://ithems-phys-sg.riken.jp/seminars.html ）

セミナーのZoomアドレスと今後のセミナー情報は
グループのメーリングリストでお知らせしますので，
参加をご希望される方は
https://docs.google.com/forms/d/e/1FAIpQLSdctDEN3C7iskSy5qLOomwnfM6-HxLH8a__FHgEy97cQcFSUA/viewform?usp=send_form
から登録をお願いいたします．
(白石さんのセミナーに参加される方は，明日の12時までご登録ください)

本郷
--

--------------------------------------------------------------------
 Masaru Hongo
 University of Illinois at Chicago
 iTHEMS Program, RIKEN
 e-mail: masaru.hongo__AT__riken.jp
             hongo__AT__ uic.edu
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From: 初田哲男
Date: Tue, 16 Feb 2021 20:16:56 +0900
To: sg-l__AT__yukawa.kyoto-u.ac.jp, ml-np__AT__rcnp.osaka-u.ac.jp
Subject: [Sg-l:5610] Seminar by Prof. Gordon Baym on Feb.22 (Mon) 10:00am-

皆様

RIKEN iTHEMS zoomセミナーを下記のように開催しますので興味のある方はご参加ください。

初田哲男(理研iTHEMS)
------------------------------

Speaker:
Prof. Gordon Baym (Univ. Illinois at Urbana Champaign /RIKEN iTHEMS)
                 https://ithems.riken.jp/en/members/gordon-baym

Title:
The Evolution of Primordial Neutrino Helicities under Gravitational and
Magnetic Fields and Implications for their Detection
Date and Time: Feb.22 (Mon) 10:00am-11:30am (JST)

Abstract:

Primordial neutrinos decoupled in the early universe in helicity
eigenstates. As I will discuss, two effects -- dependent on neutrinos
having a non-zero mass -- can modify their helicities as they propagate
through the cosmos. First, finite mass neutrinos have a magnetic moment and
thus their spins, but not their momenta, precess in cosmic and galactic
magnetic fields. The second is the propagation of neutrinos past cosmic
matter density fluctuations, which bend their momenta, and bend their spins
by a smaller amount. (The latter is a general relativistic effect.) Both
effects turn a fraction of left-handed neutrinos into right-handed
neutrinos, and right-handed antineutrinos into left-handed. If neutrino
magnetic moments approach that suggested by the XENON1T experiment as a
possible explanation of their excess of low energy electron events -- a
value well beyond the moment predicted by the standard model -- helicities
of relic Dirac (but not Majorana) neutrinos could be considerably
randomized. I finally will discuss the implications of neutrino helicity
rotation, as well as their Dirac vs. Majorana nature, on their detection
rates via the Inverse Tritium Beta Decay reaction. (Reference
 arXiv:2012.12421 )

Zoom URL: https://zoom.us/j/98864836605?pwd=QW43bmpkcm9Yd2hIejBaNTlIdWVRUT09
Contact: Tetsuo Hatsuda (iTHEMS) thatsuda__AT__riken.jp