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Tripling Fluctuations and Peaked Sound Speed in Fermionic Matter

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arxiv 2412.04971 v1 pith:ITQ5BX7N submitted 2024-12-06 hep-ph astro-ph.HEcond-mat.quant-gasnucl-th

classification hep-phastro-ph.HEcond-mat.quant-gasnucl-th
keywords clusterscrossoverfluctuationshadron-quarkmatterpeakedsoundspeed
verification ladder T0 review T1 audit T2 compute T3 formal
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A crossover involving three-fermion clusters is relevant to the hadron-quark crossover, which, if occurring in a neutron star, could naturally reproduce the dense-matter equation of state recently deduced from simultaneous observations of neutron-star masses and radii. To understand the crossover mechanism, we examine the role of tripling fluctuations induced by the formation of three-fermion clusters. The phase-shift representation of fluctuations manifests an interplay of bound and scattering states, leading to non-monotonic momentum distributions of baryon-like clusters and peaked sound speed at finite densities. We demonstrate them by applying our approach to a nonrelativistic system of one-dimensional three-color fermions analogous to the hadron-quark matter.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Recurring region for neutron-star observables

    astro-ph.HE 2025-06 conditional novelty 6.0 of 10

    Minimizing the average sound speed across a percolation-smoothed deconfinement transition selects hybrid neutron star equations of state that cross a common, small recurring region in mass-radius and mass-tidal deform...

  2. Quarkyonic Quark-Meson Coupling Model for Nuclear and Neutron Matter

    nucl-th 2025-12 conditional novelty 5.0 of 10

    A quark-based nuclear matter model combining quarkyonic Pauli blocking with quark-meson coupling can be tuned to reproduce neutron-star and heavy-ion constraints.

  3. Quantifying the Information Gain from Future High-Precision Radius Measurements for Identifying Twin Neutron Stars

    astro-ph.HE 2026-07 reject novelty 4.0 of 10

    The paper claims a radius precision of ~0.2 km is enough to extract most Bayesian information for identifying twin neutron stars, but its own distinguishability and entropy analyses suggest notable gains remain down t...

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