Calculations of charge distribution in mesons provide benchmark for experimental measurements and validate widely used 'factorization' method for imaging the building blocks of matter.
Calculations of charge distribution in mesons provide benchmark for experimental measurements and validate widely used 'factorization' method for imaging the building blocks of matter.
But the findings go further than establishing expectations for a single EIC measurement. As described in the paper, the scientists used their predictions -- together with additional independent supercomputer calculations -- to validate a widely used approach for deciphering particle properties. This approach, known as factorization, breaks complex physical processes into two components, or factors.
The quark/gluon distributions are very difficult to calculate because of the strong interactions between quarks and gluons inside a hadron. Those calculations contain billions of variables described by the theory of the strong interaction, known as quantum chromodynamics . Solving QCD equations typically requires simulating the interactions on an imaginary space-time lattice using powerful supercomputers.
Finally, the scientists compared these new predictions with the ones they'd done using a separate supercomputer calculation -- the ones that matched the Jefferson Lab measurements at low energy. By comparing the two predictions -- one calculated using factorization and one computed independently using the lattice simulation approach -- they could test whether factorization is a valid way to solve such problems.
This research was supported by the DOE Office of Science and used awards of computer time at the Argonne Leadership Computing Facility, the Oak Ridge Leadership Computing Facility, and the National Energy Research Scientific Computing Center -- all DOE Office of Science user facilities at DOE's Argonne National Laboratory, DOE's Oak Ridge National Laboratory, and DOE's Lawrence Berkeley National Laboratory, respectively.
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