Type

Journal Article

Authors

Michael Peardon

Subjects

Physics

Topics
heavy quarks channel energy levels lattice qcd variational method sources string breaking light scattering

String breaking by light and strange quarks in QCD (2019)

Abstract The energy spectrum of a system containing a static quark anti-quark pair is computed for a wide range of source separations using lattice QCD with Nf=2+1 dynamical flavours. By employing a variational method with a basis including operators resembling both the gluon string and systems of two separated static mesons, the first three energy levels are determined up to and beyond the distance where it is energetically favourable for the vacuum to screen the static sources through light- or strange-quark pair creation, enabling both these screening phenomena to be observed. The separation dependence of the energy spectrum is reliably parameterised over this saturation region with a simple model which can be used as input for subsequent investigations of quarkonia above threshold and heavy-light and heavy-strange coupled-channel meson scattering.
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Full list of authors on original publication

Michael Peardon

Experts in our system

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Michael James Peardon
Trinity College Dublin
Total Publications: 64