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Revisiting the pion's scalar form factor in chiral perturbation theory
The quark-connected and the quark-disconnected Wick contractions contributing to the pion's scalar form factor are computed in the two and in the three flavour chiral effective theory at next-to-leading order. While the quark-disconnected contribution to the form factor itself turns out to be p...
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Lenguaje: | eng |
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2011
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Acceso en línea: | https://dx.doi.org/10.1007/JHEP01(2012)007 http://cds.cern.ch/record/1392898 |