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[GSI-2021-00252] Contribution to a conference proceedings/Contribution to a book
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$\pi\pi$ scattering and $\gamma\gamma \to \pi\pi$ in SU(2)$χ$PT augmented by a light scalar
Proceedings of The 9th International workshop on Chiral Dynamics — PoS(CD2018) - Sissa Medialab Trieste, Italy, 2020. - ISBN - doi:10.22323/1.317.0087
The 9th International workshop on Chiral Dynamics, CD18, DurhamDurham, USA, 17 Sep 2018 - 21 Sep 20182018-09-172018-09-21
Sissa Medialab Trieste, Italy () [10.22323/1.317.0087]
The lowest-lying resonance in the QCD spectrum is the $0^{++}$ isoscalar $\sigma$ meson, also known as the $f_0(500)$. We augment SU(2) chiral perturbation theory $\chi$PT) by including the $\sigma$ meson as an additional explicit degree of freedom, as proposed by Soto, Talavera, and Tarr\'us and others. [...]

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