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22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

Meson electromagnetic form factors from lattice QCD

Jul 24, 2018, 6:45 PM
2h
Lincoln (Kellogg Hotel and Conference Center)

Lincoln

Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Poster Hadron Structure Poster reception

Speaker

Prof. Christine Davies (University of Glasgow)

Description

Lattice QCD can provide direct determination of the electromagnetic form factors of mesons as a prediction to be compared to upcoming experiments at Jefferson Lab. At the same time we can compare to expectations from perturbative QCD, which take a very simple form at high Q^2. We will show recent results from HPQCD, building on the work in 1701.04250. We give predictions for pi and K mesons up to 4 GeV^2 that include calculations for physical u/d quarks and provide accurate predictions for Jefferson Lab. We also extend the Q^2 range up to 20 GeV^2 by studying mesons made of heavier quarks. At these values of Q^2, discrepancies (both in the values and the Q^2-dependence) with perturbative QCD raise issues of the reliability of the assumptions going in to the perturbative QCD calculations. This has wider implications also for other processes.

Primary author

Prof. Christine Davies (University of Glasgow)

Co-authors

Mr Andre Zimermmane-Santos (University of Sao Paulo) Dr Andrew Lytle (University of Glasgow) Dr Jonna Koponen (INFN sezione di Roma Tor Vergata) Prof. Peter Lepage (Cornell University)

Presentation Materials