Nuclear Theory·nucl-th

Tuesday·December 14, 2021

12 papers—6 primary·6 cross-listed

07
[Submitted on 10 Dec 2021] (cross-list from astro-ph.HE)
Probing the incompressibility of nuclear matter at ultra-high density through the prompt collapse of asymmetric neutron star binaries
A. Perego🇮🇹 · D. Logoteta🇮🇹 · D. Radice🇺🇸 · S. Bernuzzi🇩🇪 · R. Kashyap🇺🇸 · A. Das🇺🇸 · S. Padamata🇺🇸 · A. Prakash🇺🇸
Using 250 neutron star merger simulations with microphysics, we explore for the first time the role of nuclear incompressibility in the prompt collapse threshold for binaries with different mass ratios. We demonstrate that observations of prompt collapse thresholds, either from binaries with two different mass ratios or with one mass ratio but combined with the knowledge of the maximum neutron star mass or compactness, will constrain the incompressibility at the maximum neutron star density, $K_{max}$ , to within tens of percent. This, otherwise inaccessible, measure of $K_{max}$ can potentially reveal the presence of hyperons or quarks inside neutron stars.
Comments:
7 pages, 4 figures; 2 tables and 4 figures in the appendix
Subjects:
High Energy Astrophysical Phenomena (astro-ph.HE); General Relativity and Quantum Cosmology (gr-qc); Nuclear Theory (nucl-th)
arXiv:
2112.05864 [pdf]
PRL(2022)·64 citations
08
[Submitted on 12 Dec 2021] (cross-list from hep-ph)
Radiative Correction to Lepton Proton Scatterings in Manifestly Lorentz-Invariant Chiral Perturbation Theory
Xiong-Hui Cao🇨🇳 · Qu-Zhi Li🇨🇳 · Han-Qing Zheng🇨🇳
Manifestly Lorentz-invariant baryon chiral perturbation theory is used to calculate the radiative correction of low energy elastic lepton proton scatterings. Corrections of differential cross section and charge asymmetry are given at chiral next-to-leading order $(O (p^{2}))$ with a nonzero lepton mass, which are infrared and ultraviolet finite. The results are basically consistent with previous predictions based on hadron model calculation, but they are somewhat different from calculations based on heavy baryon chiral perturbation theory, especially in charge asymmetry.
Comments:
30 pages, 18 figures, 2 tables. Matches published version
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2112.06230 [pdf]
PRD(2022)·11 citations
09
[Submitted on 12 Dec 2021] (cross-list from hep-ph)
Electromagnetic form factors of neutron and neutral stange hyperons in the oscillating view of point
An-Xin Dai🇨🇳 · Zhong-Yi Li🇨🇳 · Lei Chang🇨🇳 · Ju-Jun Xie🇨🇳
Based on the recently precise measurements of the electron-positron annihilation reactions into a neutron and anti-neutron pair by BESIII collaboration, the effective form factor of neutron was determined in the time like region, and it was found that the effective form factor of neutron is smaller than the ones of proton. The effective form factors of neutron shows a periodic behaviour, similar to the case of proton. Here, a compared analysis for $Λ$ , $Σ^{0}$ and $Ξ^{0}$ is performed. Fits of the available data on the effective form factors of $Λ$ , $Σ^{0}$ and $Ξ^{0}$ with charge zero, allow to show a universal phenomenon of the oscillation behavior in their effective form factors. However, this needs to be confirmed by future precise experiments. Both theoretical and experimental investigations of this phenomenon can shed light on the reaction mechanisms of the electron-positron annihilation process.
Comments:
4 figures, 5 pages. Experimental data on $Ξ^{0}$ are included, title is slightly modified
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2112.06264 [pdf]
CPC(2022)·16 citations
10
[Submitted on 12 Dec 2021] (cross-list from hep-ph)
Probing parton saturation and the gluon dipole via diffractive jet production at the Electron-Ion Collider
E. Iancu🇫🇷 · A.H. Mueller🇺🇸 · D.N. Triantafyllopoulos🇮🇹
We demonstrate that hard dijet production via coherent inelastic diffraction is a promising channel for probing gluon saturation at the Electron-Ion Collider. By $in e l a s t i c$ diffraction we mean a process in which the two hard jets - a quark-antiquark pair generated by the decay of the virtual photon - are accompanied by a softer gluon jet, emitted by the quark or the antiquark. This process can be described as the elastic scattering of an effective gluon-gluon dipole. The cross section takes a factorised form, between a hard factor and a unintegrated ("Pomeron") gluon distribution describing the transverse momentum imbalance between the hard dijets. The dominant contribution comes from the black disk limit and leads to a dijet imbalance of the order of the target saturation momentum $Q_{s}$ evaluated at the rapidity gap. Integrating out the dijet imbalance, we obtain a collinear factorization where the initial condition for the DGLAP evolution is set by gluon saturation.
Comments:
2 figures, 7 pages, to be published in Physical Review Letters
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
arXiv:
2112.06353 [pdf]
PRL(2022)·69 citations
11
[Submitted on 13 Dec 2021] (cross-list from hep-ph)
Anticharmed strange pentaquarks from the one-boson-exchange model
Nijiati Yalikun🇨🇳 · Bing-Song Zou🇨🇳
Inspired by the LHCb's discovery of hidden-charm pentaquarks, the anticharmed strange pentaquarks $P_{c ˉ s}$ in a favor of the hadronic molecule picture are investigated from the one-boson-exchange model. Similar to the hidden-charm pentaquarks, three molecular bound states, one with spin parity $J^{P} = 1/ 2^{-}$ below the $D ˉ Σ$ threshold and another two with $J^{P} = {1/ 2^{-}, 3/ 2^{-}}$ below the $D ˉ^{*} Σ$ threshold, are predicted at $3 - 3.2$ GeV mass region. The mass ordering of the later two states can be interchanged by different reductions of the $δ (r)$ term. Furthermore, resonances associated with these three bound states are examined by considering $D_{s}^{-} N - D ˉ Λ - D ˉ Σ - D ˉ^{*} Λ - D ˉ^{*} Σ$ coupled-channel dynamics, and decay widths of them are predicted. Our study indicates that the $D_{s}^{-} p$ invariant mass spectrum in the $B ˉ_{s}^{0} \to n ˉ D_{s}^{-} p$ decay is an appropriate place to detect the $P_{c ˉ s}$ pentaquarks.
Comments:
15 pages, 3 figures and 6 tables
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2112.06426 [pdf]
PRD(2022)·26 citations
12
[Submitted on 13 Dec 2021] (cross-list from hep-lat)
Computation of QCD meson screening masses at high temperature
Davide Laudicina🇮🇹 · Mattia Dalla Brida🇨🇭 · Leonardo Giusti🇮🇹 · Tim Harris🇬🇧 · Michele Pepe🇮🇹
We compute flavor non-singlet meson screening masses in the chiral limit of QCD with $N_{f} = 3$ quarks. The calculation is carried out at 12 temperatures from $T \approx 1$ GeV up to the electroweak scale. For each temperature we simulated several lattice spacings, so as to be able to perform the continuum limit extrapolation with confidence at a few permille accuracy. In the entire range of temperatures explored, the meson screening masses deviate from the free theory result $2 π T$ by at most a few percent. Their values, however, cannot be explained by one-loop perturbation theory up to the electroweak scale, where the pseudoscalar and the vector screening masses are still significantly different within our precision. Chiral symmetry restoration manifests itself through the degeneracy of the pseudoscalar and the scalar channels and of the vector and the axial ones.
Comments:
8 pages, 4 figures, contribution to the 38th International Symposium on Lattice Field Theory, 26th-30th July 2021, Massachusetts Institute of Technology, USA
Subjects:
High Energy Physics — Lattice (hep-lat); High Energy Physics — Experiment (hep-ex); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2112.06662 [pdf]
PoS(2022)·4 citations

Affiliations

first authorsco-authorsvia INSPIRE

Probing the incompressibility of nuclear matter at ultra-high density through the prompt collapse of asymmetric neutron star binaries

Radiative Correction to Lepton Proton Scatterings in Manifestly Lorentz-Invariant Chiral Perturbation Theory

Electromagnetic form factors of neutron and neutral stange hyperons in the oscillating view of point

Probing parton saturation and the gluon dipole via diffractive jet production at the Electron-Ion Collider

Anticharmed strange pentaquarks from the one-boson-exchange model

Computation of QCD meson screening masses at high temperature

Affiliations