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Nuclear Theory·nucl-th

Thursday·September 26, 2024

11 papers—6 primary·5 cross-listed

All11Primary6Cross-lists5
  1. 07

    Chiral effects on radiation and energy loss in quark-gluon plasma

    Jeremy Hansen🇺🇸 · Kirill Tuchin🇺🇸

    The emergent axion excitations in the quark-gluon plasma are generated by the sphaleron transitions. Their interactions with the photon and gluon fields are governed by the axion electro- and chromodynamics respectively. We discuss the effect of the emergent axion on the photon production and energy loss in the quark-gluon plasma. In particular, we review the Chiral Cherenkov effect, and the impact of the chiral anomaly on bremsstrahlung.

    ↳ hep-phnucl-thIJMPE(2024)·3 citations
  2. 08

    Radioactivity of Quark Nuggets

    Yang Bai🇺🇸 · Mrunal Korwar🇺🇸

    Quark nuggets , as Fermionic non-topological solitons, could have their mass per baryon smaller than ordinary nuclei and behave as exotic nuclei with different relations of atomic number and atomic mass number. Using both the degenerate Fermi gas model and the Friedberg-Lee shell model, we calculate the properties of quark nuggets made of up and down quarks. Similar to ordinary nuclei, quark nuggets could exhibit their own radioactivity, including gamma decay, beta decay, and (explosive) spontaneous fission, with the qualitative properties presented here. These quark nugget properties may provide guidance for searching for quark nuggets in situ from binary neutron star mergers.

    ↳ hep-phastro-ph.HEnucl-thJHEP(2025)·7 citations
  3. 09

    Disoriented isospin condensates in heavy-ion collisions

    Joseph Kapusta🇺🇸 · Scott Pratt🇺🇸 · Mayank Singh🇺🇸

    Anomalous neutral to charged kaon correlations measured by the ALICE collaboration have defied usual explanations. We propose that the large fluctuations could arise because of a disoriented isospin condensate where there is an imbalance between up and down condensates at the time kaons hadronize. This could happen in heavy-ion collisions when the quark condensate re-forms as the system cools and the approximate chiral symmetry of QCD is broken. Within the linear sigma model, we show that the energy cost of forming a disoriented isospin condensate is small making it very plausible.

    ↳ hep-phnucl-thEPJ Web Conf.(2025)·0 citations
  4. 10

    Spinodal decomposition in Bjorken flow

    Joseph Kapusta🇺🇸 · Mayank Singh🇺🇸 · Thomas Welle🇺🇸

    The QCD first-order phase transition at large baryon densities is expected to proceed by spinodal decomposition. This spinodal phase is likely to leave its signatures on the experimental observables measured in heavy-ion collision experiments. Identifying these signatures requires phenomenological models integrating surface effects resulting from the phase transition into the hydrodynamical description of the expanding quark gluon plasma. We write the equations of relativistic hydrodynamics with spinodal decomposition and solve it in on a background of Bjorken flow relevant for heavy-ion collisions.

    ↳ hep-phnucl-thEPJ Web Conf.(2025)·3 citations
  5. 11

    Finite- and infinite-volume study of scattering

    Sebastian M. Dawid🇺🇸 · Fernando Romero-López🇨🇭 · Stephen R. Sharpe🇺🇸

    We develop a comprehensive framework for extracting the pole position and properties of the doubly-charmed tetraquark from lattice QCD data using the relativistic three-particle formalism. This approach incorporates the effect of the one-pion exchange diagram in and scattering, making it applicable at energies coinciding with the left-hand cut in the partial-wave projected amplitude. We present an example application of this framework to existing lattice QCD data at MeV. We solve the integral equations describing the reaction, use LSZ reduction to determine the corresponding amplitude, and find the values of the infinite-volume two- and three-body matrices that lead to agreement with lattice phase shifts within their uncertainties. Using these matrices in the three-particle quantization condition, we describe the finite-volume spectrum and find good agreement with the lattice QCD energies. Our results suggest that, at this pion mass, the tetraquark appears as a pair of subthreshold complex poles whose precise location strongly depends on the value of the three-particle matrix.

    ↳ hep-lathep-phnucl-thJHEP(2025)·39 citations

Affiliations

first authorsco-authorsvia INSPIRE