Computing the magnetic field response of the proton

Background field methods offer an approach through which fundamental non-perturbative hadronic properties can be studied. Lattice QCD is the only ab initio method with which Quantum Chromodynamics can be studied at low energies; it involves numerically calculating expectation values in the path inte...

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Veröffentlicht in:EPJ Web of conferences 2020, Vol.245, p.6033
Hauptverfasser: Bignell, Ryan, Kamleh, Waseem, Leinweber, Derek
Format: Artikel
Sprache:eng
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Zusammenfassung:Background field methods offer an approach through which fundamental non-perturbative hadronic properties can be studied. Lattice QCD is the only ab initio method with which Quantum Chromodynamics can be studied at low energies; it involves numerically calculating expectation values in the path integral formalism. This requires substantial investment in high performance supercomputing resources. A particular challenge of lattice QCD is isolating the desired state, rather than a superposition of excited states. While extensive work has been performed which allows the ground state to be identified in lattice QCD calculations, this remains a challenging proposition for the ground state in the presence of a uniform magnetic field field. Quark level projection operators are introduced to resolve this challenge and thus allow for extraction of the magnetic polarisability.
ISSN:2100-014X
2101-6275
2100-014X
DOI:10.1051/epjconf/202024506033