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Nuclear Theory·nucl-th

Thursday·October 9, 2025

9 papers—6 primary·3 cross-listed

All9Primary6Cross-lists3
  1. 07

    Impact of relativistic corrections to high-pT prompt-psi(2S) production at hadron colliders

    Valerio Bertone🇫🇷 · Jean-Philippe Lansberg🇫🇷 · Kate Lynch🇫🇷

    We study relativistic corrections to prompt psi(2S) production at high pT in hadron colliders. Our calculation employs leading-power factorization with Fragmentation Functions (FFs) computed in nonrelativistic QCD and evolved to next-to-leading-logarithmic accuracy. Relativistic corrections increase the cross section significantly for the gluon channel, but moderately for charm. We perform a full analysis of uncertainties. We observe a good agreement with both ATLAS and CMS cross sections without the need of higher-order color-octet contributions. The polar anisotropy is found to be close to CMS data, partly due to charm fragmentation.

    ↳ hep-phhep-exhep-thnucl-th4 citations
  2. 08

    Classification of -modes for neutron stars with a strong transition: Novel universal relation including slow stable hybrid stars

    M. C. Rodriguez🇨🇱 · José C. Jiménez🇧🇷 · Ignacio F. Ranea-Sandoval🇨🇱

    We investigate the behavior of the non-radial gravity-pulsation discontinuity -mode in neutron stars with a strong first-order phase transition which give rise to hybrid-star configurations. These modes are of utmost relevance since they can be potentially excited in isolated as well as binary neutron star systems in the inspiral phase, thus allowing us to indirectly detect the presence of a deconfinement transition. In order to do this, we consider four categories of hybrid stars that present distinctive features in their equations of state. We employ the constant speed of sound parametrization, which accounts for a sharp phase transition between confined hadronic matter and deconfined quark matter. Then, working within the relativistic Cowling approximation to obtain the frequencies of non-radial oscillations, we find that, depending on the hybrid star category, the relations between discontinuity -mode frequencies and masses as well as tidal deformabilities display a highly distinct behavior across the diverse hybrid star categories that appear in the slow hadron-quark conversion regime. This distinct phenomenology provides smoking-gun evidence to clearly distinguish and further classify hybrid stars with a strong transition from purely hadronic stars using upcoming gravitational-wave data. In addition, we present for each of the categories studied the relation between the -mode frequency and the normalized energy density jump. Finally, we present a novel universal relation for the discontinuity -mode able to encompass the four categories including long branches of slow stable hybrid stars and address its asteroseismological capability.

    ↳ hep-phastro-ph.HEgr-qcnucl-thPRD(2026)·4 citations
  3. 09

    Dissecting the moat regime at low energies I: Renormalization and the phase structure

    Fabian Rennecke🇩🇪 · Shi Yin🇩🇪

    Dense QCD matter can feature a moat regime, where the static energy of mesons is minimal at nonzero momentum. Valuable insights into this regime can be gained using low-energy models. This, however, requires a careful assessment of model artifacts. We therefore study the effects of renormalization and in-medium modifications of quark-meson interaction on the moat regime. To capture the main effects, we use a two-flavor quark-meson model at finite temperature and baryon density in the random phase approximation. We put forward a convenient renormalization scheme to account for the nontrivial momentum dependence of meson self-energies and discuss the role of renormalization conditions for renormalization group consistent results on the moat regime. In addition, we demonstrate and that its extent in the phase diagram critically depends on the interaction of quarks and mesons.

    ↳ hep-phhep-thnucl-thPRD(2026)·5 citations

Affiliations

first authorsco-authorsvia INSPIRE