http://arxiv.org/abs/2211.14194
We discuss the hadron-quark crossover accompanied by the formation of Cooper triples (three-body counterpart of Cooper pairs), by analogy with the Bose-Einstein condensate to Bardeen-Cooper-Schrieffer crossover in two-component fermionic systems. Such a crossover is different from a phase transition, which often involves symmetry breaking. We calculate the in-medium three-body energy from the three-body $T$-matrix with a phenomenological three-body force characterizing a bound hadronic state in vacuum. With increasing density, the hadronic bound-state pole smoothly undergoes a crossover toward the Cooper triple phase where the in-medium three-body clusters coexist with the quark Fermi sea.
H. Tajima, S. Tsutsui, T. Doi, et. al.
Mon, 28 Nov 22
48/93
Comments: 7 pages, 3 figures
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