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HK: Fachverband Physik der Hadronen und Kerne

HK 38: Hadronenstruktur und -spektroskopie

HK 38.7: Vortrag

Donnerstag, 20. März 2014, 15:45–16:00, HZ 3

Scattering lengths of Nambu-Goldstone bosons off D mesons and dynamically generated heavy-light mesons — •Michael Altenbuchinger¹, Lisheng Geng², and Wolfram Weise^1,3 — ¹Physik Department, TU München, D-85747 Garching — ²School of Physics and Nuclear Energy Engineering, Beihang Univ., Beijing 100191, China — ³ECT*, Villazzano (Trento), Italy

Recent lattice QCD simulations of the scattering lengths of Nambu-Goldstone bosons off the D mesons are studied using unitary chiral perturbation theory. We show that the lattice QCD data are better described in the covariant formulation than in the heavy-meson formulation. The D_s0^*(2317) can be dynamically generated from the coupled-channels DK interaction without a priori assumption of its existence. A new renormalization scheme is proposed which manifestly satisfies chiral power counting rules and has well-defined behavior in the infinite heavy quark mass limit. Using this scheme we predict the heavy-quark spin and flavor symmetry counterparts of the D_s0^*(2317).

Work supported in part by BMBF, the A.v. Humboldt foundation, GSI and the DFG Excellence Cluster “Origin and Structure of the Universe”.