Mon·Dec 17, 2018Monday·December 17, 2018

1. 01*

   Addressing the hypertriton lifetime puzzle with ALICE at the LHC

   Stefano Trogolo🇮🇹

   The ALICE Collaboration collected a large data sample of Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV in 2015 at the Large Hadron Collider (LHC) and the excellent particle identification (PID) capabilities allow for the detection of rarely produced (anti-)hypernuclei. In particular, the (anti-)hypertriton, ${}_{\Lambda }^3$H, which is a bound state of a proton, a neutron and a $\Lambda$, is the lightest known hypernucleus. The results on the ${}_{\Lambda }^3$H production are compared with the predictions from a model based on coalescence approach and from statistical-thermal models to investigate the production mechanisms in heavy-ion collisions. Emphasis will also be put on the latest and more precise determination of the ${}_{\Lambda }^3$H lifetime.

   nucl-exNPA(2019)·7 citations
2. 02*

   Is the unusual near-threshold potential behavior in elastic scattering of weakly bound nuclei a precision error?

   Rodrigo Navarro Pérez🇺🇸 · Jin Lei🇺🇸

   We present the first example of a rigorous uncertainty quantification on elastic Nucleus-Nucleus scattering at energies near the Coulomb barrier. Experimental data has been analyzed using an energy dependent effective optical model potential with physical constraints imposed. We confirm the compatibility of these uncertainties with the well known Coulomb threshold anomaly, explained in terms of a dispersive relation, and contrast our results with previous analyses that suggest otherwise.

   ↳ nucl-thnucl-exPLB(2019)·12 citations
3. 03*

   Background Discrimination for Neutrinoless Double Beta Decay in Liquid Xenon Using Cherenkov Light

   Jason Philip Brodsky🇺🇸 · Samuele Sangiorgio🇺🇸 · Michael Heffner🇺🇸 · Tyana Stiegler🇺🇸

   Neutrinoless double beta decays in liquid xenon produce a significant amount of Cherenkov light, with a photon number and angular distribution that distinguishes these events from common backgrounds. A GEANT4 simulation was used to simulate Cherenkov photon production and measurement in a liquid xenon detector and a multilayer perceptron was used to analyze the resulting distributions to classify events based on their Cherenkov photons. Our results show that a modest improvement in the sensitivity of neutrinoless double beta decay searches is possible using this technique, but the kinematics of the neutrinoless double beta decay and electron scattering in liquid xenon substantially limit this approach.

   ↳ physics.ins-detnucl-exNucl.Instrum.Meth.A(2019)·9 citations
4. 04*

   Superheavy Elements: Beyond the 7th Period in the Periodic Table

   K. Hagino🇯🇵

   What is the heaviest element? In order to address this question, the elements up to $Z=118$ have been synthesized by now by using heavy-ion fusion reactions. This has completed the 7th period in the periodic table of elements, and new attempts have been commenced in aiming at syntheses of the elements in the 8th period. In this article, we review the current status and future challenges in the research field of superheavy elements, putting some emphasis on perspectives from the nuclear reaction theory.

   ↳ nucl-thnucl-ex1 citation
5. 05*

   Recent results on hard probes with ALICE and STAR

   Yaxian Mao🇨🇳

   This paper reviews recent experimental results on hard probes in heavy-ion collisions from the ALICE and STAR Collaboration. These studies include various observables characterizing jet properties like nuclear modification factors, recoil jet yields, di-jet and photon-jet energy imbalance, and the observables characterizing jet properties like jet fragmentation function and jet shapes; and measurements of high-$p_T$ charged hadrons from jet fragmentation and triggered particle correlations will be highlighted.

   ↳ hep-exnucl-exEPJ Web Conf.(2019)·0 citations
6. 06*

   ${\Omega }_c$ excited states: a molecular approach with heavy-quark spin symmetry

   Laura Tolos🇩🇪 · Rafael Pavao🇪🇸 · Juan Nieves🇪🇸

   The LHCb Collaboration has recently discovered five excited ${\Omega }_c$ states with masses between 3 and 3.1 GeV, four of them corroborated by the Belle Collaboration. We analyse the dynamical generation of these states within a molecular baryon-meson model that is consistent with both chiral and heavy-quark spin symmetries. Earlier predictions within this model found five ${\Omega }_c$ states with masses below 3 GeV. Thus, in order to study the possible identification of any of these states with the experimental ones in the correct energy region, we explore two different regularization schemes, that is, a modified regularization subtraction method and a cutoff regularization scheme. We find that at least three of the dynamically generated states can be identified with the experimental ones and have spin-parity $J=1/2^{-}$ or $J=3/2^{-}$

   ↳ hep-phnucl-exnucl-thJPS Conf.Proc.(2019)·2 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.