String breaking by light and strange quarks in QCD
Citation:
Bulava, J., Horz, B., Knechtli, F., Koch, V., Moir, G., Morningstar, C., Peardon, M. String breaking by light and strange quarks in QCD, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2019, 793, 493-498Download Item:
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.
Sponsor
Grant Number
Science Foundation Ireland (SFI)
11/RFP/PHY3218
Author's Homepage:
http://people.tcd.ie/peardonm
Author: Peardon, Michael
Publisher:
ElsevierType of material:
Journal ArticleSeries/Report no:
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics;793;
Availability:
Full text availableKeywords:
Lattice QCD, String breaking, Heavy quarksDOI:
http://dx.doi.org/10.1016/j.physletb.2019.05.018Metadata
Show full item recordLicences: