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dc.contributor.authorAbdel-Rehim, A.en
dc.contributor.authorAlexandrou, Constantiaen
dc.contributor.authorConstantinou, Marthaen
dc.contributor.authorHadjiyiannakou, Kyriakosen
dc.contributor.authorJansen, K.en
dc.contributor.authorKallidonis, Christosen
dc.contributor.authorKoutsou, Giannisen
dc.contributor.authorAvilés-Casco, A. V.en
dc.creatorAbdel-Rehim, A.en
dc.creatorAlexandrou, Constantiaen
dc.creatorConstantinou, Marthaen
dc.creatorHadjiyiannakou, Kyriakosen
dc.creatorJansen, K.en
dc.creatorKallidonis, Christosen
dc.creatorKoutsou, Giannisen
dc.creatorAvilés-Casco, A. V.en
dc.description.abstractWe evaluate the light, strange, and charm scalar content of the nucleon using one lattice QCD ensemble generated with two degenerate light quarks with mass fixed to their physical value. We use improved techniques to evaluate the disconnected quark loops to sufficient accuracy to determine the strange and charm nucleon σ terms in addition to the light quark content σπN. We find σπN=37.2(2.6)(4.72.9) MeV, σs=41.1(8.2)(7.85.8) MeV, and σc=79(21)(128) MeV, where the first error is statistical and the second is the systematic error due to the determination of the lattice spacing, the assessment of finite volume, and residual excited state effects. © 2016 American Physical Society.en
dc.sourcePhysical Review Lettersen
dc.subjectQuantum theoryen
dc.subjectElementary particlesen
dc.subjectExcited statesen
dc.subjectHigh energy physicsen
dc.subjectLattice QCDen
dc.subjectSigma termsen
dc.subjectDirect evaluationsen
dc.subjectImproved techniquesen
dc.subjectLattice spacingen
dc.subjectLight quarksen
dc.subjectQuark contentsen
dc.titleDirect Evaluation of the Quark Content of Nucleons from Lattice QCD at the Physical Pointen
dc.description.issue25Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied SciencesΤμήμα Φυσικής / Department of Physics
dc.contributor.orcidAlexandrou, Constantia [0000-0001-9136-3621]
dc.contributor.orcidKallidonis, Christos [0000-0002-7734-0789]

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