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SUMMARY:Hadron Structure from the Feynman-Hellmann Theorem
DTSTART;VALUE=DATE-TIME:20160725T160500Z
DTEND;VALUE=DATE-TIME:20160725T162500Z
DTSTAMP;VALUE=DATE-TIME:20191216T071732Z
UID:indico-contribution-2645@conference.ippp.dur.ac.uk
DESCRIPTION:Speakers: Alexander Chambers (University of Adelaide)\nAlthoug
h hadron structure calculations in lattice QCD\nhave improved greatly in r
ecent years\,\nmany problems still remain.\nVarious techniques for determi
ning fermion line disconnected contributions to\nmatrix elements have prod
uced exciting and promising results\, but\nrely on complicated analyses.\n
Additionally\, calculations of electromagnetic form factors at high\nmomen
tum transfers remain limited by low signal-to-noise ratios.\n\nIn this tal
k we present results from Feynman-Hellmann motivated approaches\nto determ
inations of these quantities.\nWe find disconnected contributions to $\\De
lta \\Sigma$ consistent with\nstochastic calculations\, and are able to ac
cess\nsignificantly higher momentum transfers for electromagnetic form\nfa
ctors than have previously been feasible.\nIn conjunction with experimenta
l data\, these results may reveal interesting information\nregarding the p
ossibility of a zero crossing in the ratio of electric\nand magnetic form
factors in the nucleon.\n\nhttps://conference.ippp.dur.ac.uk/event/470/con
tributions/2645/
LOCATION:Highfield Campus\, University of Southampton Building B2a Room 20
77
URL:https://conference.ippp.dur.ac.uk/event/470/contributions/2645/
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