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Nuclear Theory·nucl-th

Monday·March 23, 2026

7 papers—3 primary·4 cross-listed

All7Primary3Cross-lists4
  1. 01

    [Submitted on 20 Mar 2026]

    Probing short range correlations in Heavy-Ion Double Charge Exchange reactions

    Caterina Garofalo🇮🇹 · Horst Lenske🇩🇪 · Francesco Cappuzzello🇮🇹 · Manuela Cavallaro🇮🇹

    The Majorana Double Charge Exchange (MDCE) provides a suitable environment for studying the dynamics of the neutrinoless double beta () decay, particularly short-range correlations among nucleons. The study of the pion potential is essential in this respect, as it represents the strong interaction counterpart of the neutrino potential, driving nucleon correlations in decay. Numerical studies on pion potential have revealed an effective range of about 1 fm with slight dispersion around this value, confirming the short-range character of the MDCE process.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2603.19793 [pdf]
    Acta Phys.Polon.Supp.(2026)·0 citations
  2. 02

    [Submitted on 20 Mar 2026]

    A dual description of quarks and baryons: Quarkyonic matter within a relativistic quark model

    Tsuyoshi Miyatsu🇰🇷 · Myung-Ki Cheoun🇰🇷 · Koichi Saito🇯🇵

    We investigate quarkyonic matter within a relativistic quark model by combining the dual quarkyonic picture with the quark-meson coupling (QMC) model. Using relativistic gaussian quark wavefunctions for the nucleon, we construct the quarkyonic QMC (QQMC) model and study the properties of symmetric nuclear matter and pure neutron matter. We find that the quark saturation density depends sensitively on the nucleon size parameter and that nuclear interactions quantitatively modify the high-density behavior of the equation of state (EoS) and the sound velocity. In particular, the QQMC model yields an earlier onset of quark saturation than the noninteracting gaussian quarkyonic (GQ) model, indicating that nuclear interactions enhance the stiffening of the EoS in the quarkyonic regime.

    Comments:
    4 papes, 4 figures, 2 table, proceedings of The 2025 International Conference on the Structure of Baryons (Baryons 2025), Jeju, Korea, 10-14 Nov, 2025; v2: minor changes
    Subjects:
    Nuclear Theory (nucl-th); High Energy Astrophysical Phenomena (astro-ph.HE); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2603.19839 [pdf]
    J.Subatomic Part.Cosmol.(2026)·0 citations
  3. 03

    [Submitted on 20 Mar 2026]

    Renormalization group evolution and power counting in nuclear matter

    Manuel Pavon Valderrama🇨🇳

    In nuclear matter, for interparticle separations larger than the healing distance (a characteristic long-distance scale of finite-density fermionic systems), the in-medium two-body wave function is essentially a free wave function. In terms of the renormalization group (RG), this implies that the running of the effective field theory (EFT) couplings freezes for r-space cutoffs above this distance (or p-space cutoffs below the corresponding healing momentum scale). As a consequence the leading order EFT description of nuclear matter (understood here as the infrared limit of the RG) corresponds to the mean-field approximation and a set of tree-level (i.e. perturbative) leading contact-range couplings. Though the contacts do in principle inherit the power counting they had in the vacuum, their iteration is suppressed in the infrared, explaining why they become perturbative in nuclear matter. In addition to the contact-range potential, RG evolution requires the inclusion of density-dependent terms in the equation of state that can be represented by a pseudo-potential, which (unlike the genuine contacts) should not be iterated. The LO EFT description ends up being a subset of Skyrme forces previously identified by the Orsay group.

    Comments:
    33 pages, 3 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2603.19892 [pdf]
    0 citations

Affiliations

first authorsco-authorsvia INSPIRE