charge symmetry

Japanese: charge symmetry（英語表記）chargesymmetry

…From this, it is concluded that the nuclear force between protons and between neutrons is almost the same. This is called the charge symmetry of the nuclear force. It has also been confirmed that this nuclear force and the nuclear force between protons and neutrons are also almost equal. …

From [Charge Independence]

…Usually, protons are considered to be in a +1/2 state and neutrons in a -1/2 state, but for convenience, the opposite assignments may be used. The nuclear force acting between nucleons is thought to have various symmetries with respect to this isospin, of which the symmetry with respect to the exchange of protons and neutrons is called charge symmetry, and more generally, the symmetry with respect to any rotation in isospin space is called charge independence. Charge independence is considered to be a symmetry that exists not only for nuclear forces, but for the entire strong interaction. …

*Some of the terminology that mentions "charge symmetry" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…このことから陽子と陽子の間に働く核力と，中性子と中性子の間の核力とはほとんど同じであると結論される。これを核力の荷電対称性charge symmetryという。さらにこの核力と，陽子･中性子間の核力とがやはりほとんど等しいことも確かめられている。…

【荷電独立性】より

…通常は陽子が＋1/2，中性子が－1/2の状態とされるが，便宜上のことに過ぎず，逆の割当てをする場合もある。核子間に働く核力は，このアイソスピンについて種々の対称性をもつと考えられているが，そのうち陽子と中性子の入れかえに対する対称性を荷電対称性charge symmetry，より一般にアイソスピン空間での任意の回転に対する対称性を荷電独立性と呼ぶ。荷電独立性は核力に対してだけでなく，強い相互作用全体のもつ対称性と考えられている。…

※「charge symmetry」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典第２版について | 情報

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