Wed·Oct 21, 2020Wednesday·October 21, 2020

1. 01*

   A High Accuracy Electrical Stopping Power Prediction Model based on Deep Learning Algorithm and its Applications

   Xun Guo🇨🇳 · Hao Wang · Shijun Zhao · Ke Jin · Jianming Xue

   Energy loss of energetic ions in solid is crucial in many field, and accurate prediction of the ion stopping power is a long-time goal. Though great efforts have been made, it is still very difficult to find a universal prediction model to accurately calculate the ion stopping power in distinct target materials. Deep learning algorithm is a newly emerged method to solve multi-factors physical problems and can mine the deeply implicit relations among parameters, which make it a powerful tool in energy loss prediction. In this work, we developed an energy loss prediction model based on deep learning. When experimental data are available, our model can give predictions with an average absolute difference close to 5.7%, which is in the same level compared with other widely used programs e.g. SRIM. In the regime without experimental data, our model still can maintain a high performance, and has higher reliability compared with the existing models. The ion range of Au ions in SiC can be calculated with a relative error of 0.6~25% for ions in the energy range of 700~10'000 keV, which is much better than the results calculated by SRIM. Moreover, our model support the reciprocity conjecture of ion stopping power in solid proposed by P. Sigmund, which has been known for a long time but can hardly been proved by any of the existing stopping power models. This high-accuracy energy loss prediction model is very important for the research of ion-solid interaction mechanism and enormous relevant applications of energetic ions, such as in semiconductor fabrications, nuclear energy systems and the space facilities.

   ↳ physics.app-phnucl-exphysics.comp-ph0 citations
2. 02*

   Charge-dependent transverse momentum and its impact on the search for the chiral magnetic wave

   Wen-Ya Wu🇨🇳 · Chun-Zheng Wang🇨🇳 · Qi-Ye Shou🇨🇳 · Yu-Gang Ma🇨🇳 · Liang Zheng🇨🇳

   The chiral magnetic wave (CMW) is sought using the charge asymmetry ($A_{\mathrm{ch}}$) dependence of anisotropic flow in heavy-ion collisions. The charge dependent transverse momentum ($p_{\mathrm{T}}$), however, could play a role as a background. With the string fragmentation models, including PYTHIA, we demonstrate the origin of the $A_{\mathrm{ch}}-p_{\mathrm{T}}$ correlation and its connection with the local charge conservation (LCC). The impact of $A_{\mathrm{ch}}-p_{\mathrm{T}}$ and its behavior in varied kinematic windows are also discussed. This study provides more insights for the search for the CMW and comprehending the collective motion of the quark-gluon plasma.

   ↳ nucl-thnucl-exPRC(2021)·10 citations
3. 03*

   Total reaction cross section on a deuteron target and the eclipse effect of the constituent neutron and proton

   W. Horiuchi🇯🇵 · Y. Suzuki🇯🇵 · T. Uesaka🇯🇵 · M. Miwa

   Background: Eclipse effect of the neutron and proton in a deuteron target is essential to correctly describe high-energy deuteron scattering. The nucleus-deuteron scattering needs information not only on the nucleus-proton but also the nucleus-neutron interaction, for which no direct measurement of the nucleus-neutron cross sections is available for unstable nuclei. Purpose: We systematically evaluated the total reaction cross sections by a deuteron target to explore the feasibility of extracting the nucleus-neutron interaction from measurable cross sections. Methods: High-energy nucleus-deuteron collision is described by the Glauber model, in which the proton and neutron configuration of the deuteron is explicitly taken into account. Results: Our calculation reproduces available experimental total reaction cross section data on the nucleus-deuteron scattering. The possibility of extracting the nucleus-neutron total reaction cross section from nucleus-deuteron and nucleus-proton total reaction cross sections is explored. The total reaction cross sections of a nucleus by proton, neutron, and deuteron targets can be expressed, to good accuracy, in terms of the nuclear matter radius and neutron skin thickness. Incident-energy dependence of the total reaction cross sections is examined. Conclusions: The total reaction cross section on a deuteron target includes information on both the nucleus-neutron and nucleus-proton profile functions. Measuring the cross sections by deuteron and proton targets is a promising tool to extract the nuclear size properties.

   ↳ nucl-thnucl-exPRC(2020)·5 citations
4. 04*

   Signatures of $\alpha$ clustering in ${}^{16}$O by using a multiphase transport model

   Yi-An Li🇨🇳 · Song Zhang🇨🇳 · Yu-Gang Ma🇨🇳

   $\alpha$-clustered structures in light nuclei could be studied through "snapshots" taken by relativistic heavy-ion collisions. A multiphase transport (AMPT) model is employed to simulate the initial structure of collision nuclei and the proceeding collisions at center of mass energy $\sqrt{s_{NN}}$ = 6.37 TeV. This initial structure can finally be reflected in the subsequent observations, such as elliptic flow ($v_2$), triangular flow ($v_3$) and quadrangular flow ($v_4$). Three sets of the collision systems are chosen to illustrate system scan is a good way to identify the exotic $\alpha$-clustered nuclear structure, case I: ${}^{16}\mathrm{O}$ nucleus (with or without $\alpha$-cluster) + ordinary nuclei (always in Woods-Saxon distribution) in most central collisions, case II: ${}^{16}\mathrm{O}$ nucleus (with or without $\alpha$-cluster) + ${}^{197}\mathrm{Au}$ nucleus collisions for centrality dependence, and case III: symmetric collision systems (namely, ${}^{10}$B + ${}^{10}$B, ${}^{12}$C + ${}^{12}$C, ${}^{16}$O + ${}^{16}$O (with or without $\alpha$-cluster), ${}^{20}$Ne + ${}^{20}$Ne, and ${}^{40}$Ca + ${}^{40}$Ca) in most central collisions. Our calculations propose that relativistic heavy-ion collision experiments at $\sqrt{s_{NN}}$ = 6.37 TeV are promised to distinguish the tetrahedron structure of ${}^{16}\mathrm{O}$ from the Woods-Saxon one and shed lights on the system scan projects in experiments.

   ↳ hep-phnucl-exnucl-thPRC(2020)·64 citations
5. 05*

   Sterile neutrino searches at tagged kaon beams

   Luis Delgadillo🇺🇸 · Patrick Huber🇺🇸

   Tagged kaon beams are attractive neutrino sources, which would provide flavor pure ${\nu }_e$-beams with exactly measured normalization. We point out that this also leads to an anti-tagged flavor pure ${\nu }_{\mu }$-beam, with equally well known normalization. Exposing a 1 kt liquid argon detector at a baseline of 1 km to this combination of unique beams allows to decisively test recent indications by IceCube and Neutrino-4 of sterile neutrino oscillations in the multi-eV range.

   ↳ hep-phhep-exnucl-exPRD(2021)·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.