Baby steps beyond rainbow-ladder

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We discuss the impact of including corrections beyond single gluon exchange in light mesons within the nonperturbative framework of Dyson-Schwinger equations (DSE) and Bethe-Salpeter equations (BSE). We do this by considering unquenching effects in the form of hadronic resonance contributions, notably pion exchange, and by the inclusion of the dominant gluon self-interactions to the quark-gluon vertex. Thus we make steps towards an ab initio description of light mesons by functional methods.
6 pages,1 figure. Based on a talk given at ExcitedQCD 09, Feb 8-14, Zakopane, Poland

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High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/230521

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0905.2511
 http://arxiv.org/abs/0905.2511

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arXiv