Thu·May 30, 2024Thursday·May 30, 2024

1. 01*

   Neutron skin impurity from Coulomb core polarization in ${}^{208}\text{Pb}$: Insights from PREX-II and validation via the ${(}^3\text{He},t)$ isobaric analog state reaction

   Phan Nhut Huan

   I investigate the effect of Coulomb core-polarization in ${}^{208}\text{Pb}$, highlighting its impact on uncertainties in neutron distribution measurements due to the discrepancy between neutron excess and neutron skin regions at the surface. This effect is validated using the ${(}^3\text{He},t)$ isobaric analog state (IAS) reaction at 420 MeV. My findings reveal that the Coulomb boundary radius, where core-polarization becomes negligible, is critical for accurately probing the neutron skin region in the target nucleus. Consequently, I propose extending the ${}^{208}\text{Pb}{(}^3\text{He},t)$IAS reaction experiment conducted by Zegers et al. [Phys. Rev. Lett. 99, 202501 (2007)] to measure cross sections up to 3${}^{\circ }$ angles to more precisely determine the neutron skin thickness in ${}^{208}\text{Pb}$ from theoretical reaction analysis. Additionally, I observe that, under the assumption of a large neutron skin in ${}^{208}\text{Pb}$, as suggested by the PREX-II result, the core-polarization effect introduces impurity into the neutron skin region.

   ↳ nucl-thnucl-exPRC(2024)·2 citations
2. 02*

   UPC physics with ALICE in Run 3

   Anisa Khatun (for the ALICE Collaboration)🇺🇸

   The ALICE experiment has undergone a major detector upgrade for Run 3, expanding its detection capabilities for a wide variety of studies. The new continuous readout has significantly enhanced the physics potential for ultra-peripheral collision analyses. In this talk, we discussed some of the physics analyses that can be carried out in ultra-peripheral collisions using the Run 3 data and presented some of the first physics performance plots in both proton-proton and heavy-ion collisions.

   ↳ hep-exnucl-exPhys.Proc.UPC(2024)·7 citations
3. 03*

   Towards the understanding of heavy quarks hadronization: from leptonic to heavy-ion collisions

   J. Altmann🇦🇺 · A. Dubla🇩🇪 · V. Greco🇮🇹 · A. Rossi🇮🇹 · P. Skands🇦🇺

   The formation of hadrons is a fundamental process in nature that can be investigated at particle colliders. As several recent findings demonstrate, with ${\mathrm{e}}^{+}{\mathrm{e}}^{-}$ collisions as a "vacuum-like" reference at one extreme, and central nucleus--nucleus as a dense, extended-size system characterized by flow and local equilibrium at the opposite extreme, different collision systems offer a lever arm that can be exploited to probe with a range of heavy-flavour hadron species the onset of various hadronization processes. In this review, we present an overview of the theoretical and experimental developments. The focus is on open-heavy-flavour measurements. The comparison with model predictions and connections among the results in electron-positron, proton--proton, proton--nucleus, nucleus--nucleus collisions are discussed. After reviewing the current state, we suggest some prospects and future developments.

   ↳ hep-phnucl-exnucl-thEPJC(2025)·38 citations
4. 04*

   Measuring differential particle correlations in relativistic nuclear collisions

   Niseem Magdy🇺🇸

   This study explores the transverse momentum ($p_T$) dependencies of Symmetric and Asymmetric Correlations (SC and ASC) with one and two particles of interest in Au+Au collisions at 200 GeV. Leveraging the AMPT model, the investigation delves into the sensitivity of these correlations to the final state effects, providing valuable insights into their potential for constraining the final state effects' $p_T$ dependencies. The HIJING model is employed as a benchmark for non-flow correlations, shedding light on their impact on interpreting SC and ASC data. Moreover, the study points out that differential SC and ASC with one and two particles of interest (POIs) typically incorporate contributions from event-plane angle fluctuations. Consequently, this work highlights the significance of SC and ASC with one and two POIs as valuable tools for investigating the $p_T$ nature of the final state effects and advocates for comprehensive experimental measurements across various beam energies and system sizes to enhance our understanding and provide additional constraints for theoretical models.

   ↳ hep-phnucl-exnucl-thPRC(2024)·2 citations
5. 05*

   An $\text{ab initio}$ strategy for taming nuclear-structure dependence of $V_{ud}$ extractions: the ${}^{10}\mathrm{C}\to {}^{10}\mathrm{B}$ superallowed transition

   Michael Gennari🇨🇦 · Mehdi Drissi🇨🇦 · Mikhail Gorchtein🇩🇪 · Petr Navratil🇨🇦 · Chien-Yeah Seng🇺🇸

   We report the first \textit{ab initio} calculation of the nuclear-structure-dependent radiative correction ${\delta }_{\mathrm{NS}}$ to the ${}^{10}\mathrm{C}\to {}^{10}\mathrm{B}$ superallowed transition, computed with the no-core shell model and chiral effective field theory. We obtain ${\delta }_{\mathrm{NS}}=-0.422(29{)}_{\mathrm{nuc}}(12{)}_{n,\mathrm{el}}$ with a $1.6$-times reduction in the total uncertainty when compared to the current literature estimate based on the shell model and Fermi gas picture. This work paves the way for a precise determination of $V_{ud}$ from superallowed beta decays within a systematically improvable framework.

   ↳ nucl-thhep-exhep-phnucl-exPRL(2025)·41 citations
6. 06*

   Hard processes in multi-TeV ion collisions

   Benjamin Fuks🇫🇷 · Fotis Marugas · Richard Ruiz🇵🇱 · Alicja Sztandera🇵🇱

   Motivated by the ion-collision program at the Large Hadron Collider, plans for its high-luminosity upgrade, and on-going discussions for multi-TeV future hadron colliders, we systematically investigate hard-scattering, Standard Model processes in many-TeV ion-ion collisions. We focus on the symmetric beam configurations ${}^{208}$Pb-${}^{208}$Pb, ${}^{131}$Xe-${}^{131}$Xe, ${}^{12}$C-${}^{12}$C, and $pp$, and we catalog total and fiducial cross sections for dozens of processes, ranging from associated-Higgs and multiboson production to associated-top pair production, at next-to-leading order in QCD for nucleon-nucleon collision energies from $\sqrt{s_{NN}}=1$ to $100$ TeV. We report the residual scale uncertainties at this order as well as the uncertainties originating from fits of nuclear parton densities. We also discuss the propagation of nuclear dynamics (as encoded in nuclear parton densities) into parton luminosities, and ultimately into predictions for cross sections. Finally, we report on the emergence of trends and the reliability of extrapolating cross sections across different nuclei. For Pb-Pb collisions at a hypothetical Future Circular Collider with $\sqrt{s_{NN}}=39$ TeV, $\mathcal{O}(10^8)$ weak bosons, $\mathcal{O}(10^5)$ diboson pairs, $\mathcal{O}(10^4)$ $WH$ and $ZH$ pairs, $\mathcal{O}(10^3)$ triboson events, $\mathcal{O}(10^5)$ high-$p_T$ photons events, and $\mathcal{O}(10^7)$ $t\overline{t}$ pairs can be produced with $\mathcal{L}=33$~nb${}^{-1}$ of data. At $\sqrt{s_{NN}}=5.52$ TeV, one can expect $\mathcal{O}(10-10^6)$ single, multiboson, and top events per $1$ nb${}^{-1}$. Decay rates and experimental selection/acceptance rates will impact final event yields, and merits further study; as an illustrative example, we focus on select diboson and triboson channels in lead-lead collisions and discuss their observability at the high-luminosity phase of the LHC and the FCC.

   ↳ hep-phhep-exnucl-exnucl-thPRD(2025)·3 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.