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Particles, Volume 6, Issue 1

March 2023 - 25 articles

Cover Story: Gluons are massless at the level of the fundamental QCD Lagrangian, but acquire an effective mass through the action of the celebrated Schwinger mechanism. The activation of this mechanism hinges on the formation of composite massless poles, which modify the analytic structure of the fundamental vertices of the theory, and induce smoking gun displacements in the corresponding Ward identities. In this article, we elucidate the key notions connected with this special dynamical scenario, placing particular emphasis on the synergy between continuum Schwinger function methods and lattice simulations, and highlighting recent advances that corroborate the action of the Schwinger mechanism in QCD. View this paper
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Particles - ISSN 2571-712X