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Nuclear Theory·nucl-th

Tuesday·September 7, 2021

15 papers—11 primary·4 cross-listed

All15Primary11Cross-lists4
  1. 12

    Gluon radiation from a classical point particle: Recoil effects

    Isobel Kolbe🇺🇸 · Mawande Lushozi🇺🇸

    We propose a formula for gluon radiation in the fragmentation region. By comparing tree-level bremsstrahlung of a spin-less quark to the known result for gluon radiation from a classical particle struck by a sheet of colored glass arXiv:1903.01381, arXiv:1911.12738 we modify the classical formula to take into account the recoil of the struck particle. The new formula produces the correct perturbative behaviour at high momentum of the radiated gluon.

    ↳ hep-phnucl-thEPJC(2023)·1 citation
  2. 13

    Dark matter admixed neutron star as a possible compact component in the GW190814 merger event

    H. C. Das🇮🇳 · Ankit Kumar🇮🇳 · S. K. Patra🇮🇳

    We put constraints on the secondary component of GW190814 by analyzing the observational data of the event. The relativistic mean-field models are used to calculate the mass-radius profile and tidal deformability of the compact object, considering it as a massive neutron star with the presence of dark matter particles inside it. With the increase of dark matter percentage, the maximum mass, radius, and tidal deformability of the neutron star decreases. We observe that the predicted properties are well consistent with GW190814 observational data, suggesting the possibility of a dark matter admixed neutron star if the underlying nuclear equation of state is sufficiently stiff.

    ↳ astro-ph.HEgr-qcnucl-thPRD(2021)·94 citations
  3. 14

    Hierarchical Qubit Maps and Hierarchical Quantum Error Correction

    Natalie Klco🇺🇸 · Martin J. Savage🇺🇸

    We consider hierarchically implemented quantum error correction (HI-QEC), in which the fidelities of logical qubits are differentially optimized to enhance the capabilities of quantum devices in scientific applications. By employing qubit representations that propagate hierarchies in simulated systems to those in logical qubit noise sensitivities, heterogeneity in the distribution of physical-to-logical qubits can be systematically structured. For concreteness, we estimate HI-QEC's impact on surface code resources in computing low-energy observables to fixed precision, finding up to reductions in qubit requirements plausible in early error corrected simulations. Hierarchical qubit maps are also possible without error correction in qubit and qudit systems where fidelities are non-uniform, either unintentionally or by design. Hierarchical optimizations are another element in the co-design process of quantum simulations for nuclear and particle physics.

    ↳ quant-phhep-lathep-phnucl-thPRA(2021)·23 citations
  4. 15

    Constituent quark axial current couplings to light vector mesons in the vacuum and with a weak magnetic field

    F.L. Braghin🇧🇷

    Unusual constituent quark axial current couplings to light vector mesons, and , are derived in the vacuum and under weak magnetic field by considering a quark-antiquark interaction mediated by a non perturbative gluon exchange. Similarly, light axial mesons are found to couple anomalously with the constituent quark vector current. These interactions are of the type of the Wess-Zumino-Witten terms, being strongly anisotropic and dependent on the vector (or axial) meson polarization. They also provide axial (vector) form factors for the vector (axial) mesons and are quite small, suppressed nearly by with respect to the vector mesons minimal coupling to the quark vector current. Some three leg meson vertices are also presented: and (where are vector mesons and an axial meson). A vector and axial-vector mesons mixing is identified at non zero magnetic field which however can contribute only in the presence of a third particle or in a medium. Numerical results are presented for different effective gluon propagators.

    ↳ hep-phnucl-thPRD(2022)·8 citations

Affiliations

first authorsco-authorsvia INSPIRE