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Título:
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When hadrons become unstable: a novel type of non-analyticity in chiral extrapolations.
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Autores:
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Llanes Estrada, Felipe José ;
Guo, F.-K ;
Hanhart, C ;
Meißner, U.-G
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Tipo de documento:
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texto impreso
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Editorial:
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Elsevier Science BV, 2011-09-20
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física
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Tipo = Artículo
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Resumen:
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Hadron masses show a specific dependence on the quark masses. Therefore, the variation of these masses can cause a resonance in a hadronic scattering amplitude to become a bound state. Consequently, the amplitude exhibits a non analytic behavior at this transition. Crossed amplitudes, where the resonance can be exchanged in the t-channel, can be shown to exhibit the same phenomenon by s --> t analytic continuation. This entails possible kinks in lattice quark-mass extrapolations needed to compute hadronic observables.
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En línea:
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https://eprints.ucm.es/id/eprint/22426/1/Llanes-Estrada_FJ09.pdf
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