We discuss here the first phenomenological application in this work dedicated to the study performed in Ref. [19] of the lightest pseudoscalar–pseudoscalar scattering inS andP waves, with special emphasis in the analysis of the related spectroscopy.

1. 1.

   The context makes clear whenp is a four-momentum or the modulus of\(\mathbf {p}\).

2. 2.

   One can always make that\(n\ge L+1\) just by multiplying\({N}'_L\) and\({D}'_L\) by\(\displaystyle {s^k}\) withk large enough.

3. 3.

   The formalism can be straightforwardly generalized to allow for differentLs of the initial and final states in the case of hadrons with different spins.

Authors and Affiliations

1. Departamento de Física, Universidad de Murcia, Murcia, Spain

   José Antonio Oller

Corresponding author

Correspondence toJosé Antonio Oller.

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