PaperPanorama
FAQ

Nuclear Theory·nucl-th

Wednesday·September 11, 2024

10 papers—3 primary·7 cross-listed

All10Primary3Cross-lists7
  1. 01

    [Submitted on 10 Sept 2024]

    Quantum computing for extracting nuclear resonances

    Hantao Zhang🇨🇳 · Dong Bai🇨🇳 · Zhongzhou Ren🇨🇳

    Quantum computing has been increasingly applied in nuclear physics. In this work, we combine quantum computing with the complex scaling method to address the resonance problem. Due to the non-Hermiticity introduced by complex scaling, standard quantum computing cannot solve for complex eigenvalues directly. Therefore, it is necessary to embed the non-Hermitian operator into a larger dimensional unitary operator. Additionally, for the case of two basis vectors, we improve the traditional direct measurement method and optimize the quantum circuit. Ultimately, using the system as an example, we obtain the complex eigenenergies from the quantum computer that are consistent with those obtained from direct Hamiltonian diagonalization.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2409.06340 [pdf]
    PLB(2025)·13 citations
  2. 02

    [Submitted on 10 Sept 2024]

    Strangeness in Astrophysics

    Laura Tolos🇪🇸

    In this contribution the role of strangeness in astrophysics is discussed and, more precisely, strange hadronic matter in the interior of neutron stars. A special attention is payed to certain phenomena involving strange hadronic matter, such as the hyperon puzzle, kaon condensation and the thermal behaviour of hyperons in neutron star mergers.

    Comments:
    6 pages, 1 figure, contribution based on a plenary talk at the 21st International Conference on Strangeness in Quark Matter (SQM2024), Strasbourg (France), June 3-7, 2024
    Subjects:
    Nuclear Theory (nucl-th); High Energy Astrophysical Phenomena (astro-ph.HE)
    arXiv:
    2409.06461 [pdf]
    EPJ Web Conf.(2025)·1 citation
  3. 03

    [Submitted on 10 Sept 2024]

    Beam energy dependence of net-hyperon yield and its implication on baryon transport mechanism

    Chun Yuen Tsang🇺🇸 · Rongrong Ma🇺🇸 · Prithwish Tribedy🇺🇸 · Zhangbu Xu🇺🇸

    In the constituent quark model, each quark inside a baryon carries 1/3 unit of the baryon number. An alternative picture exists where the center of a Y-shaped topology of gluon fields, called the baryon junction, carries a unit baryon number. Studying baryon transport over a large rapidity gap () in nuclear collisions provides a possible tool to distinguish these two pictures. A recent analysis of global data on net-proton yield at mid-rapidity in Au+Au collisions showed an exponential dependence on and the exponential slope does not vary with event centrality, favoring the baryon junction picture. Since junctions are flavor blind, hyperons -- baryons containing valence strange quarks -- are expected to exhibit a similar behavior as the proton. This study aims to test this prediction by analyzing hyperon yields in Au+Au collisions at various energies. We observe that net-hyperon yields, after correcting for the strangeness production suppression, adhere to the expected exponential form. The extracted slope parameters for net-, net- and net- are consistent with each other and with those of net-proton within uncertainties, and exhibit no centrality dependence, further substantiating the baryon junction picture. Various implementations of the \texttt{PYTHIA} event generator, primarily based on valence quarks for baryon transport, are unable to simultaneously describe the slope parameters for all baryons.

    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2409.06492 [pdf]
    PLB(2025)·3 citations

Affiliations

first authorsco-authorsvia INSPIRE