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arXiv · 1202.3490

Meson Scattering in a Pion Superfluid

Shijun Mao·Pengfei Zhuang
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Abstract

Instead of the fermion-fermion scattering which identifies the BCS-BEC crossover in cold atom systems, boson-boson scattering is measurable and characterizes the BCS-BEC crossover at quark level. We study $π$-$π$ scattering in a pion superfluid described by the Nambu--Jona-Lasinio model. We found that the scattering amplitude drops down monotonically with decreasing isospin density and finally vanishes at the boundary of the phase transition. This indicates a BCS-BEC crossover in the pion superfluid.

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Shijun Mao, Pengfei Zhuang. 2012-10-23. Meson Scattering in a Pion Superfluid. https://doi.org/10.1103/physrevd.86.097502

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