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Nuclear Theory·nucl-th

Tuesday·December 6, 2022

12 papers—6 primary·6 cross-listed

All12Primary6Cross-lists6
  1. 07

    [Submitted on 2 Dec 2022] (cross-list from hep-lat)

    Equation of state and Taylor expansions at nonzero isospin chemical potential

    Bastian B. Brandt🇩🇪 · Francesca Cuteri🇩🇪 · Gergely Endrödi🇩🇪

    We compute the equation of state of isospin asymmetric QCD at zero and non-zero temperatures using direct simulations of lattice QCD with three dynamical flavors at physical quark masses. In addition to the pressure and the trace anomaly and their behavior towards the continuum limit, we will particularly discuss the extraction of the speed of sound. Furthermore, we discuss first steps towards the extension of the EoS to small non-zero baryon chemical potentials via Taylor expansion.

    Comments:
    10 pages, 13 figures, Proceedings of the 39th International Symposium on Lattice Field Theory, 8th-13th August 2022, Bonn, Germany
    Subjects:
    High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2212.01431 [pdf]
    PoS(2023)·12 citations
  2. 08

    [Submitted on 4 Dec 2022] (cross-list from physics.plasm-ph)

    Fusion Reactivities with Drift bi-Maxwellian Ion Velocity Distributions

    Huasheng Xie · Muzhi Tan · Di Luo · Zhi Li · Bing Liu

    The calculation of fusion reactivity involves a complex six-dimensional integral that takes into account the fusion cross-section and velocity distributions of two reactants. However, a more simplified one-dimensional integral form can be useful in certain cases, such as for studying fusion yield or diagnosing ion energy spectra. This simpler form has been derived in a few special cases, such as for a combination of two Maxwellian distributions, a beam-Maxwellian combination, and a beam-target combination, and can greatly reduce computational costs. In this study, it is shown that the reactivity for two drift bi-Maxwellian reactants with different drift velocities, temperatures, and anisotropies can also be reduced to a one-dimensional form, unifying existing derivations into a single expression. This result is used to investigate the potential enhancement of fusion reactivity due to the combination of beam and temperature anisotropies. For relevant parameters in fusion energy, the enhancement factor can be larger than 20\%, which is particularly significant for proton-boron (p-B11) fusion, as this factor can have a significant impact on the Lawson fusion gain criteria.

    Comments:
    12 pages, 10 figures, 1 supplementary material for detail derivation
    Subjects:
    Plasma Physics (physics.plasm-ph); Nuclear Theory (nucl-th)
    arXiv:
    2212.01840 [pdf]
    Plasma Phys.Control.Fusion(2023)·1 citation
  3. 09

    [Submitted on 5 Dec 2022] (cross-list from hep-lat)

    Particle-dimer approach for the Roper resonance in a finite volume

    Daniel Severt🇩🇪 · Maxim Mai🇩🇪 · Ulf-G. Meißner🇩🇪

    We propose a new finite-volume approach which implements two- and three-body dynamics in a transparent way based on an Effective Field Theory Lagrangian. The formalism utilizes a particle-dimer picture and formulates the quantization conditions based on the self-energy of the decaying particle. The formalism is studied for the case of the Roper resonance, using input from lattice QCD and phenomenology. Finally, finite-volume energy eigenvalues are predicted and compared to existing results of lattice QCD calculations. This crucially provides initial guidance on the necessary level of precision for the finite-volume spectrum.

    Comments:
    37 pages, 8 figures, some minor modifications, accepted for publication in JHEP
    Subjects:
    High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2212.02171 [pdf]
    JHEP(2023)·28 citations
  4. 10

    [Submitted on 5 Dec 2022] (cross-list from hep-ph)

    Tracing the emergence of collectivity phenomena in small systems

    B Schenke🇺🇸 · S Schlichting🇩🇪 · P Singh🇫🇮

    We study initial state momentum correlations and event-by-event geometry in p+Pb collisions at by following the approach of extending the IP-Glasma model to 3D using JIMWLK rapidity evolution. On examining the non-trivial rapidity dependence of the observables, we find that the geometry is correlated over large rapidity intervals, while the initial state momentum correlations have a relatively short range in rapidity. Based on our results, we discuss implications for the relevance of both effects in explaining the origin of collective phenomena in small systems.

    Comments:
    Contribution to: Quark Matter 2022, 6 pages and 3 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2212.02278 [pdf]
    Acta Phys.Polon.Supp.(2023)·2 citations
  5. 11

    [Submitted on 5 Dec 2022] (cross-list from hep-ph)

    Neutrino-tagged jets at the Electron-Ion Collider

    Miguel Arratia🇺🇸 · Zhong-Bo Kang🇺🇸 · Sebouh J. Paul🇺🇸 · Alexei Prokudin🇺🇸 · Felix Ringer🇺🇸 · Fanyi Zhao🇺🇸

    We explore the potential of jet observables in charged-current deep-inelastic scattering (CC DIS) events at the future Electron-Ion Collider (EIC). Tagging jets with a recoiling neutrino, which can be identified by the event's missing transverse momentum, will allow for flavor-sensitive measurements of Transverse Momentum Dependent parton distribution functions (TMDs). We present the first predictions for transverse-spin asymmetries in azimuthal neutrino-jet correlations and hadron-in-jet measurements. We study the kinematic reach and the precision of these measurements and explore their feasibility using parameterized detector simulations. We conclude that jet production in CC DIS, while challenging in terms of luminosity requirements, will complement the EIC experimental program to study the three-dimensional structure of the nucleon encoded in TMDs.

    Comments:
    14 pages, 10 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
    arXiv:
    2212.02432 [pdf]
    PRD(2023)·17 citations
  6. 12

    [Submitted on 5 Dec 2022] (cross-list from hep-ph)

    Jet quenching for heavy flavors in and collisions

    B.G. Zakharov🇷🇺

    We perform a global analysis of experimental data on jet quenching for heavy flavors for scenarios with and without quark-gluon plasma formation in collisions. We find that the theoretical predictions for the nuclear modification factor for heavy flavors at the LHC energies are very similar for these scenarios, and the results for and agree reasonably with the LHC data. The agreement with data at the RHIC top energy becomes somewhat better for the intermediate scenario, in which the quark-gluon plasma formation in collisions occurs only at the LHC energies. Our fits to heavy flavor show that description of jet quenching for heavy flavors requires somewhat bigger than data on jet quenching for light hadrons.

    Comments:
    15 pages, 12 figures
    Subjects:
    High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
    arXiv:
    2212.02478 [pdf]
    J.Exp.Theor.Phys.(2023)·1 citation

Affiliations

first authorsco-authorsvia INSPIRE