Thu·Dec 22, 2016Thursday·December 22, 2016

1. 01*

   Deformation dependence of the isovector giant dipole resonance: The neodymium isotopic chain revisited

   L.M. Donaldson (1,2)🇿🇦 · C.A. Bertulani (3)🇺🇸 · J. Carter (1)🇿🇦 · V.O. Nesterenko (4)🇷🇺 · P. von Neumann-Cosel (5)🇩🇪 · R. Neveling (2)🇿🇦 · P.-G. Reinhard (6)🇩🇪 · I.T. Usman (1)🇿🇦 · P. Adsley (2,7)🇿🇦 · J.W. Brummer (7)🇿🇦 · E.Z. Buthelezi (2)🇿🇦 · G.R.J. Cooper (8)🇿🇦 and 22 other authors

   Proton inelastic scattering experiments at energy E_p = 200 MeV and a spectrometer scattering angle of 0 degree were performed on 144,146,148,150Nd and 152Sm exciting the IsoVector Giant Dipole Resonance (IVGDR). Comparison with results from photo-absorption experiments reveals a shift of resonance maxima towards higher energies for vibrational and transitional nuclei. The extracted photo-absorption cross sections in the most deformed nuclei, 150Nd and 152Sm, exhibit a pronounced asymmetry rather than a distinct double-hump structure expected as a signature of K-splitting. This behaviour can be related to the proximity of these nuclei to the critical point of the phase shape transition from vibrators to rotors with a soft quadrupole deformation potential. Self-consistent random-phase approximation (RPA) calculations using the SLy6 Skyrme force provide a relevant description of the IVGDR shapes deduced from the present data

   nucl-exnucl-thPLB(2018)·38 citations
2. 02*

   Leading Hadron Production in $d$+Au and ${}^3$He+Au collisions in the PHENIX experiment

   Takao Sakaguchi (for the PHENIX collaboration)🇺🇸

   Neutral pions have been measured in ${}^3$He+Au collisions at $\sqrt{s_{{}_{NN}}}$=200 GeV up to 20 GeV/$c$ in the RHIC Year-2014 run. The nuclear modification factor $R_{\mathrm{AA}}$ was measured and compared with that from $d$+Au collisions. The integrated $R_{\mathrm{AA}}$ as a function of $N_{\mathrm{part}}$ was calculated for $d$+Au, ${}^3$He+Au and Au+Au collisions at $\sqrt{s_{{}_{NN}}}$=200 GeV, and found to converge for $N_{\mathrm{part}}>$12, while a clear system ordering $R_{\mathrm{dAu}}$$>$$R_{\mathrm{HeAu}}$$>$$R_{\mathrm{AuAu}}$ was observed for $N_{\mathrm{part}}<$12. The fractional momentum loss for the most central ${}^3$He+Au collisions was also estimated.

   nucl-exhep-exnucl-thNucl.Part.Phys.Proc.(2017)·1 citation
3. 03*

   Neutral-Current Weak Interactions at an EIC

   Y. X. Zhao🇺🇸 · A. Deshpande🇺🇸 · J. Huang🇺🇸 · K. S. Kumar🇺🇸 · S. Riordan🇺🇸

   A simulation study of measurements of neutral current structure functions of the nucleon at the future high-energy and high-luminosity polarized electron-ion collider (EIC) is presented. A new series of $\gamma -Z$ interference structure functions, $F_1^{\gamma Z}$, $F_3^{\gamma Z}$, $g_1^{\gamma Z}$, $g_5^{\gamma Z}$ become accessible via parity-violating asymmetries in polarized electron-nucleon deep inelastic scattering (DIS). Within the context of the quark-parton model, they provide a unique and, in some cases, yet-unmeasured combination of unpolarized and polarized parton distribution functions. The uncertainty projections for these structure functions using electron-proton collisions are considered for various EIC beam energy configurations. Also presented are uncertainty projections for measurements of the weak mixing angle ${\sin }^2{\theta }_W$ using electron-deuteron collisions which cover a much higher $Q^2$ than that is accessible in fixed target measurements. QED and QCD radiative corrections and effects of detector smearing are included with the calculations.

   nucl-exhep-exhep-phEPJA(2017)·25 citations
4. 04*

   Anomalous Chiral Transport in Heavy Ion Collisions

   Jinfeng Liao🇺🇸

   Chiral anomaly is a very fundamental aspect of quantum theories with chiral fermion, from the Standard Model to supersymmetric field theories or even string theories. How such microscopic anomaly manifests itself in a macroscopic many-body system with chiral fermions, is a highly nontrivial question that has recently attracted significant interest. As it turns out, unusual transport currents can be induced by chiral anomaly under suitable conditions in such systems, with the notable example of the Chiral Magnetic Effect (CME) where a vector current (e.g. electric current) is generated along an external magnetic field. The CME has been enthusiastically studied in two very different physical systems: the Dirac and Weyl semimetals in condensed matter physics as well as the quark-gluon plasma in heavy ion collisions. In this contribution, we report the latest theoretical and experimental status for the search of CME in heavy ion collisions.

   ↳ hep-phcond-mat.mes-hallhep-thnucl-ex+1PoS(2016)·0 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.