Generalised Parton Distributions in Continuum Schwinger Methods: Progresses, Opportunities and Challenges

Mezrag, Cédric

doi:10.3390/particles6010015

Cited by 7 publications

(1 citation statement)

References 172 publications

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“…They add information about the distribution of partons in the plane perpendicular to the bound-state's total momentum, i.e., within the light-front itself. GPDs can be measured in deeply virtual Compton scattering, so long as at least one of the photons possesses large virtuality, and in deeply virtual meson production [49]. A key feature of GPDs is that they provide a direct connection between DFs and hadron form factors because any DF may be recovered as the forward limit of the relevant GPD and any elastic form factor can be expressed via a GPD-based sum rule.…”

Section: Empirical Determination Of the Pion Mass Distributionmentioning

confidence: 99%

Revealing the Origin of Mass through Studies of Hadron Spectra and Structure

Roberts

2024

EPJ Web Conf.

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The Higgs boson is responsible for roughly 1% of the visible mass in the Universe. Obviously, therefore, Nature has another, very effective way of generating mass. In working toward identifying the mechanism, contempo rary strong interaction theory has arrived at a body of basic predictions, viz. the emergence of a nonzero gluon mass-scale, a process-independent effective charge, and dressed-quarks with constituent-like masses. These three phenom ena – the pillars of emergent hadron mass (EHM) – explain the origin of the vast bulk of visible mass in the Universe. Their expressions in hadron observables are manifold. This contribution highlights a few; namely, some of the roles of EHM in building the meson spectrum, producing the leading-twist pion distribution amplitude, and moulding hadron charge and mass distributions.

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Section: Empirical Determination Of the Pion Mass Distributionmentioning

confidence: 99%

Revealing the Origin of Mass through Studies of Hadron Spectra and Structure

Roberts

2024

EPJ Web Conf.

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Pseudoscalar Mesons and Emergent Mass

Raya,

Bashir,

Binosi

et al. 2024

Few-Body Syst

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Despite its role in the continuing evolution of the Universe, only a small fraction of the mass of visible material can be attributed to the Higgs boson alone. The overwhelmingly dominant share may/should arise from the strong interactions that act in the heart of nuclear matter; namely, those described by quantum chromodynamics. This contribution describes how studying and explaining the attributes of pseudoscalar mesons can open an insightful window onto understanding the origin of mass in the Standard Model and how these insights inform our knowledge of hadron structure. The survey ranges over distribution amplitudes and functions, electromagnetic and gravitational form factors, light-front wave functions, and generalized parton distributions. Advances made using continuum Schwinger function methods and their relevance for experimental efforts are highlighted.

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