Development of injection scheme of antiprotons and production of antihydrogen atoms in low-lying excited states
Year: 2017
Type: dissertation
Abstract: 論文の内容の要旨 論文題目Development of injection scheme of antiprotons and production of antihydrogen atoms in low-lying excited states (反陽子入射方法の開発と低励起状態反水素原子の生成) 氏名 田島 美典 C, P, and T symmetries are three discrete symmetries which have attracted much attention in modern physics.They are the symmetries of physical laws under charge conjugation (C), parity inversion (P), and time reversal (T), respectively.Although C symmetry, P symmetry, and two-combined CP symmetry are experimentally shown to be broken, and the mechanism of their violations are well-described in the Standard Model, it is widely believed that threecombined symmetry, CPT symmetry, is to be conserved in all laws of physics.When CPT symmetry holds, the mass, the lifetime, the absolute value of charge and magnetic moment of a particle and its antiparticle must be the same.But this brings a big unresolved question, which is called "baryon asymmetry".It refers to the fact that there exist far larger amount of baryonic matter compared to antimatter in the observable universe, in contrast to the natural assumption that the universe must have equal amount of matter and antimatter under CPT symmetry.Currently there is no satisfying explanation for this problem.The experimental investigation of CPT symmetry could give a clue to solve the mystery, as well as the fundamental frame work of the theory of particle physics beyond the Standard Model.
DOI: 10.15083/00077730
Author: 田島, 美典
Language: English
Topic: Atomic and Molecular Physics
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7207621297