D e <chr_abbr type="reg" class="dc" expan="que" cert="no">q-hbar</chr_abbr>l part le<chr_var letter="s" var="long">∫</chr_var> noz genz <chr_var letter="s" var="long">∫</chr_var>e tien<chr_abbr type="reg" class="dc" expan="ent" cert="no">et-hbar</chr_abbr> 