<chr_abbr type="reg" class="dc" expan="Qui" cert="no">Q-vbar</chr_abbr> tant <chr_var letter="s" var="long">∫</chr_var>iert b<chr_abbr type="reg" class="dc" expan="" cert="no">n-hbar</chr_abbr> <chr_abbr type="reg" class="ss" expan="com" cert="no">com</chr_abbr>tenu<chr_var letter="s" var="long">∫</chr_var> 