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Paper detail

Generalised Parton Distributions from Lattice Feynman-Hellmann Techniques

We report on the use of Feynman-Hellmann techniques to calculate the off-forward Compton amplitude (OFCA) in lattice QCD. At leading-twist, the Euclidean OFCA is parameterised by the Mellin moments of generalised parton distributions (GPDs). Hence we extract GPD moments for two values of the soft momentum transfer, $t=-1.10, -2.20\;\text{GeV}^2$ and zero-skewness kinematics at an unphysical pion mass of $m_π\approx 470\;\text{MeV}$. This includes the first determination of the $n=4$ moments.

preprint2022arXivOpen access
Alec Hannaford-GunnKadir Utku CanRoger HorsleyHolder PerltPaul RakowGerrit SchierholzHinnerk StübenRoss YoungJames Zanotti
hep-phhep-latnucl-th
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Alec Hannaford-GunnKadir Utku CanRoger HorsleyHolder PerltPaul RakowGerrit SchierholzHinnerk StübenRoss YoungJames Zanotti

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