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Nuclear Theory·nucl-th

Thursday·September 28, 2023

9 papers—5 primary·4 cross-listed

All9Primary5Cross-lists4
  1. 06

    Applied nonrelativistic conformal field theory: scattering-length and effective-range corrections to unnuclear physics

    Subham Dutta Chowdhury🇺🇸 · Ruchira Mishra🇺🇸 · Dam Thanh Son🇺🇸

    Due to an accidentally large -wave scattering length, in a relatively wide range of energy, neutrons are approximately described by the nonrelativistic conformal field theory of unitarity fermions, perturbed by one relevant and an infinite number of irrelevant operators. We develop a formalism which provides a nonperturbative definition of local operators in that nonrelativistic conformal field theory. We compute the scattering-length and effective-range corrections to the two-point functions of primary charge-three operators using the technique of conformal perturbation theory. These calculations allow us to find the first corrections to the scale-invariant behavior of the rate of nuclear reactions with three neutrons in the final state in the regime when the neutrons have small relative momenta.

    ↳ hep-thnucl-thPRD(2024)·8 citations
  2. 07

    Investigating excited states from pentaquark perspective

    Ye Yan🇨🇳 · Xiaohuang Hu🇨🇳 · Hongxia Huang🇨🇳 · Jialun Ping🇨🇳

    Inspired by the recent observation of new states by the LHCb Collaboration, we explore the excited states from the pentaquark perspective in the quark delocalization color screening model. Our results indicate that the can be well interpreted as a molecular predominated resonance state with . The can also be interpreted as a molecular state with and a new molecular state with and a mass of 3527 MeV is predicted, which is worth searching in the future. Other reported states cannot be well described in the framework of pentaquark systems in present work. The three-quark excited state, or the unquenched picture may be a good explanation, which is worth further exploration.

    ↳ hep-phnucl-thPRD(2023)·17 citations
  3. 08

    Measuring Mass and Radius of the Maximum-mass Nonrotating Neutron Star

    Shao-Peng Tang🇨🇳 · Bo Gao🇨🇳 · Yin-Jie Li🇨🇳 · Yi-Zhong Fan🇨🇳 · Da-Ming Wei🇨🇳

    The mass () and radius () of the maximum-mass nonrotating neutron star (NS) play a crucial role in constraining the elusive equation of state of cold dense matter and in predicting the fate of remnants from binary neutron star (BNS) mergers. In this study, we introduce a novel method to deduce these parameters by examining the mergers of second-generation (2G) black holes (BHs) with NSs. These 2G BHs are assumed to originate from supramassive neutron stars (SMNSs) formed in BNS mergers. Since the properties of the remnant BHs arising from the collapse of SMNSs follow a universal relation governed by and , we anticipate that by analyzing a series ( detections) of mass and spin measurements of the 2G BHs using the third-generation ground-based gravitational-wave detectors, and can be determined with a precision of and km, respectively.

    ↳ astro-ph.HEgr-qcnucl-thApJ(2024)·7 citations
  4. 09

    Dynamic fermion flavor mixing through transition dipole moments

    Johann Rafelski🇺🇸 · Andrew Steinmetz🇺🇸 · Cheng Tao Yang🇺🇸

    We show that Majorana neutrino flavor mixing can be driven by transition dipole moments in the presence of external electromagnetic fields. We demonstrate the sensitivity of the rotation mixing matrix to strong fields obtaining dynamical mass eigenstates in the two-flavor model. The three-flavor case and extensions to the quark sector are introduced.

    ↳ hep-phnucl-thInt.J.Mod.Phys.A(2023)·3 citations

Affiliations

first authorsco-authorsvia INSPIRE