2025年度 (最新) 学院等開講科目理学院物理学系物理学コース

ハドロン物理学 II

開講元: 物理学コース
担当教員: 慈道大介
授業形態: 講義
メディア利用科目: -
曜日・時限 (講義室): 火3-4 (WL2-301(W631))
クラス: -
科目コード: PHY.F439
単位数: 100
開講時期: 2025年度
開講クォーター: 2Q
シラバス更新日: 2025年3月31日
使用言語: 英語

シラバス

授業の目的（ねらい）、概要

Hadrons are particles interacting with strong forces and are composed of quarks and gluons. Nevertheless, owing to the color confinement phenomenon, quarks and gluons are confined in the hadrons and are never observed directly. Therefore, the minimum elements that can be observed are hadrons. Most of the visible mass in our universe is due to the hadron mass. In the descriptions of the hadron structure and dynamics, symmetries play important roles. In this lecture, basics of quantum chromodynamics (QCD), which is the fundamental theory of the dynamics of quarks and gluons, are explained. The nature of the coupling constant of the strong interaction, that is called as asymptotic freedom, is the outstanding feature of QCD, and the spontaneous breaking of chiral symmetry is responsible for the mass generation of quarks. Effective models based on chiral symmetry for hadron physics are also introduced. The purpose of the course is to let the students understand hadrons which constitute the present universe, and to understand quarks, gluons, and QCD which is the theory of strong interaction. Another purpose is to let the students know theoretical tools to study hadron physics.

到達目標

[Objectives] Students will understand the basics of hadron physics by taking this course. Students will understand the features of strong interaction, the description of hadrons based on quarks, and features of quantum chromodynamics.
[Topics] Strong interaction, symmetries in hadron physics, properties of hadron, color charge, gluons, asymptotic freedom, chiral effective theories, chiral symmetry, current algebra, hadron mass generation, etc.

キーワード

strong interaction, chiral symmetry, baryons, mesons, color charge, gluons, quantum chromodynamics, asymptotic freedom, origin of mass, dynamical breaking of chiral symmetry, chiral effective theories.

学生が身につける力

専門力
教養力
コミュニケーション力
展開力 (探究力又は設定力)
展開力 (実践力又は解決力)

授業の進め方

Lecture notes are distributed in advance. The lectures are given by writing on the blackboard. The lecture notes are open in T2SCHOLA.

授業計画・課題

	授業計画	課題
第1回	Basics of Quantum Chromodynamics	To be able to understand the meaning of asymptotic freedom.
第2回	Symmetry and conservation law	Drive the Noether current from a Lagangian.
第3回	Current algebra and PCAC	Explain what PCAC is.
第4回	Chiral Symmetry	Explain what chiral symmetry is and how it is described theoretically.
第5回	Linear sigma model	Demonstrate the spontaneous chiral symmetry breaki ng in a hadron theory
第6回	Fermion mass generation	Explain the mechanism of quark mass generation.
第7回	Nambu-Goldstone theorem in QCD	Derive the Gell-Mann Oakes Renner relation.

準備学修(事前学修・復習)等についての指示

学修効果を上げるため，教科書や配布資料等の該当箇所を参照し，「毎授業」授業内容に関する予習と復習（課題含む）をそれぞれ概ね100分を目安に行うこと。

教科書

Lecture notes will be distributed via T2SCHOLA.

参考書、講義資料等

'Particles and Nuclei', B. Povh et al., Springer,
'Elementary Particle Physics, volume 1 and 2', Y. Nagashima, WILEY-VCH,
'Quarks, Baryons and Chiral Symmetry', A. Hosaka and H. Toki, World Scientific,
'Gauge Field Theories, an introduction with applications', Mike Guidry, WILEY-VCH
'Relativistic Quantum Mechanics and Field Theory', Franz Gross, Wiley-Interscience

成績評価の方法及び基準

Quizzes and problems given during the classes. The quizzes are given in the response sheet distributed in the end of each class. The problems are written in handouts distributed at each class.

履修の条件・注意事項

It is required that the students have enough knowledge on quantum physics.

その他

This lecture is given in English.