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2007

Gluon contributions to the pion mass and light cone momentum fraction

Meyer, Harvey B., Negele, John W.

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We calculate the matrix elements of the gluonic contributions to the energy-momentum tensor for a pion of mass 600 < Mpi < 1100 MeV in quenched lattice QCD.

We find that gluons contribute (37 +/- 8 +/- 12)% of the pion's light cone momentum.
The bare matrix elements corresponding to the trace anomaly contribution to the pion mass are also obtained.
The discretizations of the energy-momentum tensor we use have other promising applications, ranging from calculating the origin of hadron spin to QCD thermodynamics.

Gluon contributions to the pion mass and light cone momentum fraction · Around

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