Nuclear Theory·nucl-th

Tuesday·November 7, 2023

15 papers—9 primary·6 cross-listed

10
[Submitted on 3 Nov 2023] (cross-list from hep-ph)
Precision three-dimensional imaging of nuclei using recoil-free jets
Shen Fang🇨🇳 · Weiyao Ke🇨🇳 · Ding Yu Shao🇨🇳 · John Terry🇺🇸
In this study, we explore the azimuthal angle decorrelation of lepton-jet pairs in e-p and e-A collisions as a means for precision measurements of the three-dimensional structure of bound and free nucleons. Utilizing soft-collinear effective theory, we perform the first-ever resummation of this process in e-p collisions at NNLL accuracy using a recoil-free jet axis. Our results are validated against Pythia simulations. In e-A collisions, we address the complex interplay between three characteristic length scales: the medium length $L$ , the mean free path of the energetic parton in the medium $λ$ , and the hadronization length $L_{h}$ . We demonstrate that in the thin-dilute limit, where $L ≪ L_{h}$ and $L \sim λ$ , this process can serve as a robust probe of the three-dimensional structure for bound nucleons. We conclude by offering predictions for future experiments at the Electron-Ion Collider within this limit.
Comments:
23 pages, 4 figures; v2: fixed language typos and added journal reference
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:
2311.02150 [pdf]
JHEP(2024)·12 citations
11
[Submitted on 5 Nov 2023] (cross-list from astro-ph.HE)
Collective neutrino oscillations and heavy-element nucleosynthesis in supernovae: exploring potential effects of many-body neutrino correlations
A. Baha Balantekin🇺🇸 · Michael J. Cervia🇺🇸 · Amol V. Patwardhan🇺🇸 · Rebecca Surman🇺🇸 · Xilu Wang🇨🇳
In high-energy astrophysical processes involving compact objects, such as core-collapse supernovae or binary neutron star mergers, neutrinos play an important role in the synthesis of nuclides. Neutrinos in these environments can experience collective flavor oscillations driven by neutrino-neutrino interactions, including coherent forward scattering and incoherent (collisional) effects. Recently, there has been interest in exploring potential novel behaviors in collective oscillations of neutrinos by going beyond the one-particle effective or "mean-field" treatments. Here, we seek to explore implications of collective neutrino oscillations, in the mean-field treatment and beyond, for the nucleosynthesis yields in supernova environments with different astrophysical conditions and neutrino inputs. We find that collective oscillations can impact the operation of the $ν p$ -process and $r$ -process nucleosynthesis in supernovae. The potential impact is particularly strong in high-entropy, proton-rich conditions, where we find that neutrino interactions can nudge an initial $ν p$ process neutron rich, resulting in a unique combination of proton-rich low-mass nuclei as well as neutron-rich high-mass nuclei. We describe this neutrino-induced neutron capture process as the " $ν$ i process". In addition, nontrivial quantum correlations among neutrinos, if present significantly, could lead to different nuclide yields compared to the corresponding mean-field oscillation treatments, by virtue of modifying the evolution of the relevant one-body neutrino observables.
Comments:
26 pages, 17 figures, 3 tables, v2 matches version to appear in ApJ
Subjects:
High Energy Astrophysical Phenomena (astro-ph.HE); Solar and Stellar Astrophysics (astro-ph.SR); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
arXiv:
2311.02562 [pdf]
ApJ(2024)·29 citations
12
[Submitted on 5 Nov 2023] (cross-list from hep-lat)
Coupled-channel $Λ_{c} K^{+} - p D_{s}$ Interaction in Flavor $SU (3)$ Limit of Lattice QCD
Faisal Etminan🇮🇷 · Kenji Sasaki🇯🇵 · Takashi Inoue🇯🇵
We study $S$ -wave interactions in the $I (J^{p}) = 1/2 (1/ 2^{-})$ $Λ_{c} K^{+} - p D_{s}$ system on the basis of the coupled-channel HAL QCD method. The potentials which are faithful to QCD S-matrix below the $p D^{*}$ threshold are extracted from Nambu-Bethe-Salpeter wave functions on the lattice in Flavor $SU (3)$ Limit. For the simulation, we employ $3$ -flavor full QCD gauge configurations on a $(1.93 fm)^{3}$ volume at $m_{π} ≃ 872$ MeV. %\textcolor{red}{For the charm quark, the relativistic heavy quark action is employed to treat its dynamics on the lattice}. We present our results of the S-wave coupled-channel potentials for the $Λ_{c} K^{+} - p D_{s}$ system in the $1/2 (1/ 2^{-})$ state as well as scattering observables obtained from the extracted potential matrix. We observe that the coupling between $Λ_{c} K^{+}$ and $p D_{s}$ channels is weak. The phase shifts and scattering length obtained from the extracted potential matrix show that the $Λ_{c} K^{+}$ interaction is attractive at low energy and stronger than the $p D_{s}$ interaction though no bound state at $m_{π} \geq 872$ MeV.
Comments:
20 pages, 7 Figures, 5 tables
Subjects:
High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
arXiv:
2311.02569 [pdf]
PRD(2024)·7 citations
13
[Submitted on 6 Nov 2023] (cross-list from astro-ph.HE)
Constraints on the Neutron-Star Structure from the Clocked X-Ray Burster 1RXS J180408.9 $-$ 342058
Akira Dohi · Wataru Iwakiri · Nobuya Nishimura · Tsuneo Noda · Shigehiro Nagataki · Masa-aki Hashimoto
Type-I X-ray bursts are rapid-brightening transient phenomena on the surfaces of accreting neutron stars (NSs). Some X-ray bursts, called {\it clocked bursters}, exhibit regular behavior with similar light curve profiles in their burst sequences. The periodic nature of clocked bursters has the advantage of constraining X-ray binary parameters and physics inside the NS. In the present study, we compute numerical models, based on different equations of state and NS masses, which are compared with the observation of a recently identified clocked burster, 1RXS J180408.9 $-$ 342058. We find that the relation between accretion rate and recurrence time is highly sensitive to the NS mass and radius. We determine, in particular, that 1RXS J180408.9 $-$ 342058 appears to possess a mass less than $1.7 M_{⊙}$ and favors a stiffer nuclear equation of state (with an NS radius $≳ 12.7 km$ ). Consequently, the observations of this new clocked burster may provide additional constraints for probing the structure of NSs.
Comments:
7 pages, 5 figures, accepted for publication in ApJ
Subjects:
High Energy Astrophysical Phenomena (astro-ph.HE); Nuclear Theory (nucl-th)
arXiv:
2311.02853 [pdf]
ApJ(2024)·8 citations
14
[Submitted on 6 Nov 2023] (cross-list from hep-ph)
The study on the multiplicity dependence of ridge behavior in $pp$ collisions at $s = 13$ TeV at the LHC
Jeongseok Yoon🇰🇷 · Jin-Hee Yoon🇰🇷
The long-range near-side ridge phenomenon in two-particle correlation is crucial for understanding the motion of partons after high-energy heavy-ion collisions. While it has been well explained by the hydrodynamic flow effect of the quark-gluon plasma (QGP) in heavy-ion collisions, the recent observation of the ridge structure in small systems has led to debates about the applicability of hydrodynamic models to explain the phenomenon since the collisions in small systems could not be sufficient to produce the medium required by the QGP matter. The Momentum Kick Model (MKM), on the other hand, explains the long-range near-side ridge phenomenon by the kinematic process; the high-momentum jet particles collide with medium partons, transfer their momentum to them (called the ``kick" process), and induce collective motion of the kicked-partons resulting in the ridge phenomenon. This MKM has successfully described the ridge structure in heavy-ion collisions at the RHIC. Furthermore, since the ridge phenomenon in small systems is prominent in high-multiplicity events, the MKM with multiplicity dependence (MKMwM) has been studied in $pp$ collisions at the LHC using a relationship between the number of kicked-partons and the multiplicity through an impact parameter. In this research, we extend the previous study with more recent experimental data-driven parameters and apply them to the new measurements that have a wider multiplicity range with $p_{T}$ and $ΔΦ$ bins at the LHC. Simultaneously, we not only provide a theoretical basis for the ridge behavior from the new measurements but also predict the ridge structure at the energies scheduled by the LHC in the upcoming Run 3 experiments.
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2311.02913 [pdf]
NPA(2024)·0 citations
15
[Submitted on 6 Nov 2023] (cross-list from hep-ph)
Charge and energy deposition in the McDIPPER framework
Oscar Garcia-Montero🇩🇪 · Sören Schlichting🇩🇪 · Hannah Elfner🇩🇪
In this short note we present aspects of the energy and charge deposition within the McDIPPER, a novel 3D resolved model for the initial state of ultrarelativistic Heavy-Ion collisions based on the $k_{⊥}$ -factorized Color Glass Condensate hybrid approach. This framework is a initial-state Monte Carlo event generator which deposits the relevant conserved charges (energy, charge and baryon densities) both in the midrapidity and forward/backward regions of the collision. The event-by-event generator computes the gluon and (anti-) quark phase-space densities using the IP-Sat model, from where the conserved charges can be extracted directly. In this work we present the centrality and collision energy dependence for the deposited conserved quantities at midrapidity and the full event, the so-called $4 π$ solid angle range.
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2311.03125 [pdf]
PoS(2024)·5 citations

Affiliations

first authorsco-authorsvia INSPIRE

Precision three-dimensional imaging of nuclei using recoil-free jets

Collective neutrino oscillations and heavy-element nucleosynthesis in supernovae: exploring potential effects of many-body neutrino correlations

Coupled-channel Λc​K+−pDs​ Interaction in Flavor SU(3) Limit of Lattice QCD

Constraints on the Neutron-Star Structure from the Clocked X-Ray Burster 1RXS J180408.9−342058

The study on the multiplicity dependence of ridge behavior in pp collisions at s​=13 TeV at the LHC

Charge and energy deposition in the McDIPPER framework

Affiliations

Coupled-channel $Λ_{c} K^{+} - p D_{s}$ Interaction in Flavor $SU (3)$ Limit of Lattice QCD

Constraints on the Neutron-Star Structure from the Clocked X-Ray Burster 1RXS J180408.9 $-$ 342058

The study on the multiplicity dependence of ridge behavior in $pp$ collisions at $s = 13$ TeV at the LHC