Nuclear Theory·nucl-th

Friday·May 26, 2023

12 papers—3 primary·9 cross-listed

04
[Submitted on 24 May 2023] (cross-list from hep-th)
A post-Gaussian approach to dipole symmetries and interacting fractons
Javier Molina-Vilaplana🇪🇸
We use a post-Gaussian variational approach to non-perturbatively study a general class of interacting bosonic quantum field theories with generalized dipole symmetries and fractonic behaviour. We find that while a Gaussian approach allows to carry out a consistent renormalization group (RG) flow analysis of these theories, this only grasps the interaction terms associated to the longitudinal motion of dipoles, which is consistent with previous analysis using large $N$ techniques. Remarkably, our post-Gaussian proposal, by providing a variational improved effective potential, is able to capture the transverse part of the interaction between dipoles in such a way that a non trivial RG flow for this term is obtained and analyzed. Our results suggest that dipole symmetries that manifest due to the strong coupling of dipoles, may robustly emerge at low energies from short distance models without that symmetry.
Comments:
34 pages, 4 figures, 4 appendices. v2: some references added and two paragraphs rewritten
Subjects:
High Energy Physics — Theory (hep-th); Strongly Correlated Electrons (cond-mat.str-el); Nuclear Theory (nucl-th)
arXiv:
2305.15448 [pdf]
JHEP(2023)·5 citations
05
[Submitted on 24 May 2023] (cross-list from nucl-ex)
Predictions for the sPHENIX physics program
Ron Belmont🇺🇸 · Jasmine Brewer🇨🇭 · Quinn Brodsky🇺🇸 · Paul Caucal🇫🇷 · Megan Connors🇺🇸 · Magdalena Djordjevic🇷🇸 · Raymond Ehlers🇺🇸 · Miguel A. Escobedo🇪🇸 · Elena G. Ferreiro🇪🇸 · Giuliano Giacalone🇩🇪 · Yoshitaka Hatta🇺🇸 · Jack Holguin🇫🇷 and 16 other authors
sPHENIX is a next-generation detector experiment at the Relativistic Heavy Ion Collider, designed for a broad set of jet and heavy-flavor probes of the Quark-Gluon Plasma created in heavy ion collisions. In anticipation of the commissioning and first data-taking of the detector in 2023, a RIKEN-BNL Research Center (RBRC) workshop was organized to collect theoretical input and identify compelling aspects of the physics program. This paper compiles theoretical predictions from the workshop participants for jet quenching, heavy flavor and quarkonia, cold QCD, and bulk physics measurements at sPHENIX.
Comments:
60 pages, summary paper of the "Predictions for sPHENIX" RBRC workshop held at BNL in July 2022, published version
Subjects:
Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2305.15491 [pdf]
NPA(2024)·32 citations
06
[Submitted on 24 May 2023] (cross-list from hep-ph)
Imprints of the nuclear symmetry energy slope in gravitational wave signals emanating from neutron stars
Luiz L. Lopes🇧🇷 · Victor B. T. Alves🇧🇷 · César O. V. Flores🇧🇷 · German Lugones🇧🇷
We investigate possible traces of the nuclear symmetry energy slope ( $L$ ) in the gravitational wave emission of neutron stars. For fixed stellar mass values, we examine how the slope influences the stellar radius, compactness, the tidal deformability, the frequency of the quadrupole fundamental fluid mode, and the damping time of the mode due to the gravitational wave emission. We demonstrate that all these physical quantities are sensitive to the slope and could potentially impose significant constraints on it.
Comments:
Published Version
Subjects:
High Energy Physics — Phenomenology (hep-ph); General Relativity and Quantum Cosmology (gr-qc); Nuclear Theory (nucl-th)
arXiv:
2305.15527 [pdf]
PRD(2023)·13 citations
07
[Submitted on 25 May 2023] (cross-list from quant-ph)
Is the Aharonov-Bohm phase shift for a non-closed path a measurable quantity ?
Masashi Wakamatsu
There recently appear some interesting attempts to explain the AB-effect through the interaction between the charged particle and the solenoid current mediated by the exchange of a virtual photon. A vital assumption of this approach is that AB-phase shift is proportional to the change of the interaction energy between the charged particle and solenoid along the path of the moving charge. Accordingly, they insist that the AB-phase change along a path does not depend on the gauge choice so that the AB-phase shift for a non-closed path is in principle measurable. We however notice the existence of two fairly different discussions on the interaction energy between the solenoid and a charge particle, the one is due to Boyer and the other is due to Saldanha and others. In the present paper, based on a self-contained quantum mechanical treatment of the combined system of a solenoid, a charged particle, and the quantized electromagnetic fields, we show that both interaction energies of Boyer and of Saldanha are in fact gauge invariant at least for non-singular gauge transformations but they are destined to cancel each other. Our analysis rather shows that the origin of the AB-phase can be traced back to other part of our effective Hamiltonian. Furthermore, based on the path-integral formalism with our effective Lagrangian, we explicitly demonstrate that the AB-phase shift for a non-closed path is not a gauge-variant quantity, which means that it would not correspond to direct experimental observables.
Comments:
Version to appear in European Physical Journals Plus
Subjects:
Quantum Physics (quant-ph); High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2305.15658 [pdf]
Eur.Phys.J.Plus(2024)·9 citations
08
[Submitted on 25 May 2023] (cross-list from hep-ph)
$Z_{cs}$ , $Z_{c}$ and $Z_{b}$ states under the complex scaling method
Jian-Bo Cheng🇨🇳 · Bo-Lin Huang🇨🇳 · Zi-Yang Lin🇨🇳 · Shi-Lin Zhu🇨🇳
We investigate the $Z_{b}$ , $Z_{c}$ and $Z_{cs}$ states within the chiral effective field theory framework and the $S$ -wave single channel molecule picture. With the complex scaling method, we accurately solve the Schrödinger equation in momentum space. Our analysis reveals that the $Z_{b} (10610)$ , $Z_{b} (10650)$ , $Z_{c} (3900)$ and $Z_{c} (4020)$ states are the resonances composed of the $S -$ wave $(B B ˉ^{*} + B^{*} B ˉ) / 2$ , $B^{*} B ˉ^{*}$ , $(D D ˉ^{*} + D^{*} D ˉ) / 2$ and $D^{*} D ˉ^{*}$ , respectively. Furthermore, although the $Z_{cs} (3985)$ and $Z_{cs} (4000)$ states exhibit a significant difference in width, these two resonances may originate from the same channel, the $S -$ wave $(D_{s} D ˉ^{*} + D_{s}^{*} D ˉ) / 2$ . Additionally, we find two resonances in the $S -$ wave $D_{s}^{*} D ˉ^{*}$ channel, corresponding to the $Z_{cs} (4123)$ and $Z_{cs} (4220)$ states that await experimental confirmation.
Comments:
10 pages, 5 figures, 4 tables
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
arXiv:
2305.15787 [pdf]
EPJC(2023)·10 citations
09
[Submitted on 25 May 2023] (cross-list from hep-ph)
The magnetic properties of a deuteron $r_{m}$ from the AdS/QCD hard-wall model
Minaya Allahverdiyeva🇦🇿 · Narmin Huseynova🇦🇿 · Shahin Mamedov🇦🇿 · Jannat Samadov🇦🇿
The deuteron is a spin1 particle and due to current conservation and the P and C invariance of the EM interaction, it has three EM form factors in the one photon exchange (OPE) approximation, which include the charge GC(Q2), quadrupole GQ(Q2) and magnetic GM(Q2) form factors and was calculated in [1, 2, 3] at a zero temperature within soft-wall and hard-wall models AdS/QCD. In this work, we numerically calculated the deuteron magnetic radius RM in the framework of the hard-wall model of AdS/QCD and compare our results with the experimental data and soft-wall model results [2]
Comments:
3 pages, COİA-2022 conference proceeding
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2305.15830 [pdf]
0 citations
10
[Submitted on 25 May 2023] (cross-list from hep-th)
The electromagnetic fine-structure constant in primordial nucleosynthesis revisited
Ulf-G. Meißner🇩🇪 · Bernard Ch. Metsch🇩🇪 · Helen Meyer🇩🇪
We study the dependence of the primordial nuclear abundances as a function of the electromagnetic fine-structure constant $α$ , keeping all other fundamental constants fixed. We update the leading nuclear reaction rates, in particular the electromagnetic contribution to the neutron-proton mass difference pertinent to $β$ -decays, and go beyond certain approximations made in the literature. In particular, we include the temperature-dependence of the leading nuclear reactions rates and assess the systematic uncertainties by using four different publicly available codes for Big Bang nucleosynthesis. Disregarding the unsolved so-called lithium-problem, we find that the current values for the observationally based $^{2}$ H and $^{4}$ He abundances restrict the fractional change in the fine-structure constant to less than $2%$ , which is a tighter bound than found in earlier works on the subject.
Comments:
26 pages, 26 figures
Subjects:
High Energy Physics — Theory (hep-th); Cosmology and Nongalactic Astrophysics (astro-ph.CO); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2305.15849 [pdf]
EPJA(2023)·23 citations
11
[Submitted on 25 May 2023] (cross-list from hep-ph)
Thermodynamics and phase diagrams of the Polyakov quark-meson model with on-shell versus curvature mass parameter fixing
Suraj Kumar Rai🇮🇳 · Vivek Kumar Tiwari🇮🇳
The Quantum Chromodynamics (QCD) phase structure has been studied using the Polyakov-loop augmented quark-meson model (PQM) in the extended mean field approximation (e-MFA) where the quark one-loop vacuum term is included.~When the divergent vacuum term is regularized in the minimal subtraction scheme and the curvature meson masses are used to fix the parameters,~the Polyakov quark-meson model with the vacuum term (PQMVT) becomes inconsistent as the curvature masses are determined by calculating the self energies at zero momentum.~The above inconsistency is remedied by the on-shell parameter fixing when the pion decay constant and the pole masses of the mesons are put into the relation of the couplings and running mass parameter by using the on-shell and the minimal subtraction renormalization scheme.~Combining the modified chiral effective potential of the on-shell renormalized quark-meson model (RQM) with the Polyakov-loop potential that mimics the physics of the confinement-deconfinement transition,~we get the renormalized Polyakov quark-meson (RPQM) model.~The phase diagrams and the thermodynamics details for the PQM, PQMVT and RPQM model, have been computed and compared for different forms of the Polyakov-loop potentials with and without the quark back-reaction.~The results have also been compared with the available lattice QCD data.~The so called quarkyonic phase region in the phase diagram, where the chiral symmetry is restored but the quarks and anti-quarks are still confined,~gets reduced by the quark back-reaction in the unquenched Polyakov-loop potential.~It altogether disappears for the chemical potential dependent parameter $T_{0} \equiv T_{0} (μ)$ in the Log or the PolyLog-glue form of the Polyakov-loop potential in the RPQM model.
Comments:
26 pages, 14(30) figures
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2305.16180 [pdf]
PRD(2023)·8 citations
12
[Submitted on 25 May 2023] (cross-list from hep-ph)
The complex heavy-quark potential with the Gribov-Zwanziger action
Manas Debnath🇮🇳 · Ritesh Ghosh🇮🇳 · Najmul Haque🇮🇳
Gribov-Zwanziger prescription in Yang-Mills theory improves the infrared dynamics. In this work, we study the static potential of a heavy quark-antiquark pair with the HTL resummed perturbation method within the Gribov-Zwanziger approach at finite temperature. The real and imaginary parts of the heavy quark complex potential are obtained from the one-loop effective static gluon propagator. The one-loop effective gluon propagator is obtained by calculating the one-loop gluon self-energies containing the quark, gluon, and ghost loop. The gluon and ghost loops are modified in the presence of the Gribov parameter. We also calculate the decay width from the imaginary part of the potential. We also discuss the medium effect of heavy quark potential with the localized action via auxiliary fields.
Comments:
11 pages, 5 figures, v2, published version
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2305.16250 [pdf]
EPJC(2024)·19 citations

Affiliations

first authorsco-authorsvia INSPIRE