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Nuclear Theory·nucl-th

Thursday·November 25, 2021

8 papers—3 primary·5 cross-listed

All8Primary3Cross-lists5
  1. 04

    Holographic QCD in the NICER era

    Niko Jokela🇺🇸 · Matti Järvinen🇰🇷 · Jere Remes🇪🇸

    We analyze families of hybrid equations of state of cold QCD matter, which combine input from gauge/gravity duality and from various ab initio methods for nuclear matter at low density, and predict that all neutron stars are fully hadronic without quark matter cores. We focus on constraints from recent measurements by the NICER telescope on the radius and mass of the millisecond pulsar PSR J0740+6620. These results are found to be consistent with our approach: they set only mild constraints on the hybrid equations of state, and favor the most natural models which are relatively stiff at low density. Adding an upper bound on the maximal mass of neutron stars, as suggested by the analysis of the GW170817 neutron star merger event, tightens the constraints considerably. We discuss updated predictions on observables such as the transition density and latent heat of the nuclear to quark matter transition as well as the masses, radii, and tidal deformabilities of neutron stars.

    ↳ hep-phastro-ph.HEhep-thnucl-thPRD(2022)·27 citations
  2. 05

    supersymmetric Yang-Mills thermodynamics from effective field theory

    Jens O. Andersen🇳🇴 · Qianqian Du🇨🇳 · Michael Strickland🇺🇸 · Ubaid Tantary🇺🇸

    The free energy density of supersymmetric Yang-Mills theory in four space-time dimensions is derived through second order in the 't Hooft coupling at finite temperature using effective-field theory methods. The contributions to the free energy density at this order come from the hard scale and the soft scale . The effects of the scale are encoded in the coefficients of an effective three-dimensional field theory that is obtained by dimensional reduction at finite temperature. The effects of the electric scale are taken into account by perturbative calculations in the effective theory.

    ↳ hep-thhep-phnucl-thPRD(2022)·13 citations
  3. 06

    Neutrinos and their interactions

    M. Sajjad Athar🇮🇳 · S. K. Singh🇮🇳

    We present a short overview of the importance of the study of "Neutrino Interactions in the Intermediate and High Energy Region", with an introduction to the neutrinos and a very brief description about the collection of invited articles.

    ↳ hep-phnucl-thEur.Phys.J.ST(2021)·5 citations
  4. 07

    Detecting Entrainment in Fermi-Bose Mixtures

    Khalid Hossain · Subhadeep Gupta · Michael McNeil Forbes

    We propose an experimental protocol to directly detect the Andreev-Bashkin effect (entrainment) in the bulk mixture of a bosonic and fermionic superfluid using a ring geometry. Our protocol involves the interferometric detection of the entrainment-induced phase gradient across a superfluid due to the flow of another in which it is immersed. The choice of ring geometry eliminates variations in the stronger mean-field interaction which can thwart the detection of entrainment in other geometries. A significant enhancement of the entrainment phase shift signal is possible, if the dimer-boson scattering length turns out to be large, which can be measured by tuning the interaction to the limit of miscibility of the two superfluids. With suggested improvements and careful design implementation, one may achieve % shift in the interferometer fringes.

    ↳ cond-mat.quant-gasnucl-thPRA(2022)·2 citations
  5. 08

    A moderately-sized nuclear network to assist multi-D hydrodynamic simulations of supernova explosions

    Axel Sanz · Rubén Cabezón · Domingo García-Senz

    A key ingredient in any numerical study of supernova explosions is the nuclear network routine that is coupled with the hydrodynamic simulation code. When these studies are performed in more than one dimension, the size of the network is severely limited by computational issues. In this work, we propose a nuclear network, net87, which is close to one hundred nuclei and could be appropriate to simulate supernova explosions in multidimensional studies. One relevant feature is that electron and positron captures on free protons and neutrons have been incorporated to the network. Such addition allows for a better track of both, the neutronized species and the gas pressure. A second important feature is that the reactions are implicitly coupled with the temperature, which enhances the stability in the nuclear statistical equilibrium (NSE) regime. Here we analyze the performance of net87 in light of both: the computational overhead of the algorithm and the outcome in terms of the released nuclear energy and produced yields in typical Type Ia Supernova conditions.

    ↳ astro-ph.SRastro-ph.HEnucl-thEPJ Web Conf.(2022)·1 citation

Affiliations

first authorsco-authorsvia INSPIRE