IPM Calendar 
Sunday 9 August 2020   Today  
Events for day: Monday 27 July 2020    
           11:00 - 12:00     Journal Club: Experiment & Phenomenology-skyroom
Charm-anticharm asymmetry in the nucleon from lattice QCD

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PARTICLES AND ACCELERATORS

Based on : some papers


Abstract: The first lattice QCD calculation of the charm quark contribution to the nucleon electromagnetic form factors $G^2_{E,M}(Q^2)$ in the momentum transfer range 0?Q^2?1.4 GeV^2. The quark mass dependence, finite lattice spacing, and volume corrections are taken into account simultaneously based on the calculation on three gauge ensembles including one at the physical pion mass. The nonzero value of the charm magnetic moment ?^c_M=?0.00127(38)stat(5)sys, as well as the Pauli form factor, reflects a nontrivial role of the charm sea in the nucleon spin structure. The nonzero $G^c_{E}(Q^2) indicat ...