L or<chr_var letter="s" var="long">∫</chr_var> li di<chr_var letter="s" var="long">∫</chr_var>trent <chr_abbr type="reg" class="dc" expan="que" cert="no">q-hbar</chr_abbr>le<chr_var letter="s" var="long">∫</chr_var> uoudroi<chr_abbr type="reg" class="dc" expan="en" cert="no">e-hbar</chr_abbr>t 