Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2009-11-06
PoS LAT2009:113,2009
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 4 figures. Poster presented at the "XXVII International Symposium on Lattice Field Theory", July 26-31 2009, Peking U
Scientific paper
Charmonium states can decay into pairs of $D$ and $\overline{D}$ mesons if their masses are above the allowed decay thresholds. In general $c\bar{c}$ states near threshold will also undergo mixing with $D\overline{D}$ molecular (or tetraquark) states, by creation and annihilation of light quark-antiquark pairs. The investigation of such effects sheds light on the higher Fock state contributions to charmonium wavefunctions and on mass shifts, relative to a scenario where such mixing effects are neglected. A variational approach is applied to a mixing matrix between operators of both sectors, of $c\bar{c}$ and of $D\overline{D}$ molecular type. The efficient calculation of several diagrams appearing in this matrix requires all-to-all propagators, which are realized by sophisticated stochastic estimator techniques. The runs are performed on $n_F=2$ $24^3\times 48$ lattice volumes with $m_{\pi} \approx 280$ MeV, using the non-perturbatively improved clover Wilson action, both for valence and for sea quarks.
Bali Gunnar
Ehmann Christian
No associations
LandOfFree
Mixing of S-Wave Charmonia with $\mathrm{D}\overline{\mathrm{D}}$ Molecule States does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Mixing of S-Wave Charmonia with $\mathrm{D}\overline{\mathrm{D}}$ Molecule States, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mixing of S-Wave Charmonia with $\mathrm{D}\overline{\mathrm{D}}$ Molecule States will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-391205