• Lowest resonance in QCD from low-energy data 

    Ametller Congost, Lluís; Talavera Sánchez, Pedro (American Physical Society, 2014-05-12)
    Article
    Accés obert
    We worked out a generalization of su(2) chiral perturbation theory, including a perturbative singlet scalar field. The approach suggests that the prediction for sensible low-energy observables converge faster towards ...