Twisted mass lattice computation of charmed mesons with focus on $D^{\ast \ast }$

Abstract

We present results of a 2+1+1 flavor twisted mass lattice QCD computation of the spectrum of $D$ mesons and $D_s$ mesons and of charmonium. Particular focus is put on the positive parity $D$ states (so-called $D^{\ast \ast }$ mesons) with quantum numbers $J^P=0^{+}$, $1^{+}$ and $2^{+}$. Besides computing their masses we are also separating and classifying the two $J^P=1^{+}$ states according to the angular momentum/spin of their light degrees of freedom (light quarks and gluons) $j=1/2,3/2$.

Comments: contrib. to the 31st International Symposium on Lattice Field Theory - LATTICE 2013, July 29 - August 3, 2013