$D \pi$ scattering and $D$ meson resonances from lattice QCD

By D. Mohler, S. Prelovsek, R. Woloshyn. 2012

133 citations recorded by the source corpus.

The masses and widths of the broad scalar D_0^*(2400) and the axial D_1(2430) charmed-light resonances are extracted by simulating the corresponding D Pi and D* Pi scattering on the lattice. The resonance parameters are obtained using a Breit-Wigner fit of the elastic phase shifts. The resulting D_0^*(2400) mass is 351+/-21 MeV above the spin-average 1/4(m_D+3m_{D*}), in agreement with the experimental value of 347+/-29 MeV above. The resulting D_0^* to D Pi coupling g^{lat}=2.55+/-0.21 GeV is close to the experimental value g^{exp}<=1.92+/-0.14 GeV, where g parametrizes the width $\Gamma\equiv g^2p^*/s$. The resonance parameters for the broad D_1(2430) are also found close to the experimental values; these are obtained by appealing to the heavy quark limit, where the neighboring resonance D_1(2420) is narrow. The calculated I=1/2 scattering lengths are a_0=0.81+/-0.14 fm for D Pi and a_0=0.81+/-0.17 fm for D* Pi scattering. The simulation of the scattering in these channels incorporates quark-antiquark as well as multi-hadron interpolators, and the distillation method is used for contractions. In addition, the ground and several excited charm-light and charmonium states with various J^P are calculated using standard quark-antiquark interpolators. Our simulations are done in lattice QCD with two-dynamical light quarks at a mass corresponding to m_\pi\approx 266 MeV.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/730478a90a8d3c8c076e7243ed7c5e0b5828db93

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Citations in the corpus

The XYZ states: Experimental and theoretical status and perspectives (2019, unknown): “[130, 131, 920, 921].”
Scattering processes and resonances from lattice QCD (2017, background): “…have reported on the determination of elastic scattering amplitudes involving mesons containing a heavy quark (Lang et al., 2015, 2014b, 2016; Mohler et al., 2013; Prelovsek and Leskovec, 2013a) – these studies have typically considered only the rest frame in a single volume, giving a…”
Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, background): “Strong decays of resonances containing a single heavy quark were considered only for the lowlying charmed resonances with J = 0, 1±, 2 [537, 538].”
Hadronic molecules (2017, unknown): “(Mohler et al., 2013a).”