Light scalar susceptibilities and isospin breaking



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Torres Andrés, R. and Gómez Nicola, Ángel (2010) Light scalar susceptibilities and isospin breaking. In International Workshop on Chiral Symmetry in Hadrons and Nuclei. AIP Conference Proceedings (1322). Amer Inst Physics, pp. 354-358. ISBN 978-0-7354-0878-4

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Making a thermal analysis in the context of NLO SU(3) Chiral Perturbation Theory we see that isospin breaking (1B) corrections (both electromagnetic and QCD ones) to quark condensates are of order beta(e(2)) and beta(epsilon) with epsilon the pi(0) - eta mixing angle. However the combination chi(uu) - chi(ud) of flavour breaking susceptibilities, which vanishes in the isospin limit and can be identified essentially with the connected susceptibility, has an order beta(1) contribution enhanced with T because of the pi 0 - eta mixing. Finally we present a thermal sum rule that relates quark condensate ratios and the light scalar susceptibility without IB, chi(T) - chi(0).

Item Type:Book Section
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© Amer Inst Physics.
Conferencia: International Workshop on Chiral Symmetry in Hadrons and Nuclei (2010. Valencia. España).
Work partially supported by the Spanish research contracts FPA2008-00592, FIS2008- 01323, UCM-BSCH GR58/08 910309 and the FPI programme (BES-2009-013672).

Uncontrolled Keywords:Chiral perturbation-theory; Virtual photons; Transition; Qcd
Subjects:Sciences > Physics > Physics-Mathematical models
Sciences > Physics > Mathematical physics
ID Code:30278
Deposited On:22 May 2015 08:35
Last Modified:10 Dec 2018 15:09

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