Wed·Jul 30, 2014Wednesday·July 30, 2014

1. 01*

   Heavy-ion physics studies for the Future Circular Collider

   Nestor Armesto🇪🇸 · Andrea Dainese🇮🇹 · David d'Enterria🇨🇭 · Silvia Masciocchi🇩🇪 · Christof Roland🇺🇸 · Carlos Salgado🇺🇸 · Marco van Leeuwen🇳🇱 · Urs Wiedemann🇨🇭

   The Future Circular Collider (FCC) design study is aimed at assessing the physics potential and the technical feasibility of a new collider with centre-of-mass energies, in the hadron-hadron collision mode including proton and nucleus beams, more than seven-times larger than the nominal LHC energies. An electron-positron collider in the same tunnel is also considered as an intermediate step, which would provide the electron-hadron option in the long term. First ideas on the physics opportunities with heavy ions at the FCC are presented, covering the physics of Quark-Gluon Plasma, gluon saturation, photon-induced collisions, as well as connections with ultra-high-energy cosmic rays.

   nucl-exhep-phnucl-thNPA(2014)·22 citations
2. 02*

   Searches for $p_{\mathrm{T}}$ dependent fluctuations of flow angle and magnitude in Pb--Pb and p--Pb collisions

   You Zhou (for the ALICE Collaboration)🇳🇱

   Anisotropic azimuthal correlations are used to probe the properties and the evolution of the system created in heavy-ion collisions. Two-particle azimuthal correlations were used in the searches of $p_{\mathrm{T}}$ dependent fluctuations of flow angle and magnitude, measured with the ALICE detector. The comparison of hydrodynamic calculations with measurements will also be presented in this proceedings.

   nucl-exNPA(2014)·33 citations
3. 03*

   Coherent neutrino-nucleus scattering detection with a CsI[Na] scintillator at the SNS spallation source

   J.I. Collar🇺🇸 · N.E. Fields🇺🇸 · E. Fuller · M. Hai🇺🇸 · T.W. Hossbach🇺🇸 · J.L. Orrell🇺🇸 · G. Perumpilly🇺🇸 · B. Scholz🇺🇸

   We study the possibility of using CsI[Na] scintillators as an advantageous target for the detection of coherent elastic neutrino-nucleus scattering (CENNS), using the neutrino emissions from the SNS spallation source at Oak Ridge National Laboratory. The response of this material to low-energy nuclear recoils like those expected from this process is characterized. Backgrounds are studied using a 2 kg low-background prototype crystal in a dedicated radiation shield. The conclusion is that a planned 14 kg detector should measure approximately 550 CENNS events per year above a demonstrated $\sim 7$ keVnr low-energy threshold, with a signal-to-background ratio sufficient for a first measurement of the CENNS cross-section. The cross-section for the ${}^{208}$Pb(${\nu }_e,e^{-}$)${}^{208}$Bi reaction, of interest for future supernova neutrino detection, can be simultaneously obtained.

   ↳ physics.ins-detastro-ph.IMhep-exhep-ph+1Nucl.Instrum.Meth.A(2015)·88 citations
4. 04*

   Collective effects in light-heavy ion collisions

   Bjoern Schenke🇺🇸 · Raju Venugopalan🇺🇸

   We present results for the azimuthal anisotropy of charged hadron distributions in A+A, p+A, d+A, and He3+A collisions within the IP-Glasma+MUSIC model. Obtained anisotropies are due to the fluid dynamic response of the system to the fluctuating initial geometry of the interaction region. While the elliptic and triangular anisotropies in peripheral Pb+Pb collisions at root-s=2.76 TeV are well described by the model, the same quantities in root-s=5.02 TeV p+Pb collisions underestimate the experimental data. This disagreement can be due to neglected initial state correlations or the lack of a detailed description of the fluctuating spatial structure of the proton, or both. We further present predictions for azimuthal anisotropies in p+Au, d+Au, and He3+Au collisions at root-s=200 GeV. For d+Au and 3He+Au collisions we expect the detailed substructure of the nucleon to become less important.

   ↳ nucl-thhep-phnucl-exNPA(2014)·27 citations
5. 05*

   ${}^3$H/${}^3$He ratio as a probe of the nuclear symmetry energy at sub-saturation densities

   Yongjia Wang🇨🇳 · Chenchen Guo🇨🇳 · Qingfeng Li🇨🇳 · Hongfei Zhang🇨🇳

   Within the newly updated version of the Ultra-relativistic quantum molecular dynamics (UrQMD) model in which the Skyrme potential energy-density functional is introduced, the yield ratio between ${}^3$H and ${}^3$He clusters emitted from central ${}^{40}$Ca+${}^{40}$Ca, ${}^{96}$Zr+${}^{96}$Zr, ${}^{96}$Ru+${}^{96}$Ru, and ${}^{197}$Au+${}^{197}$Au collisions in the beam energy range from 0.12 to 1 GeV$/$nucleon is studied. The recent FOPI data for the ${}^3$H$/$${}^3$He ratio are compared with UrQMD calculations using 13 Skyrme interactions (all exhibiting similar values of iso-scalar incompressibility but very different density dependences of the symmetry energy). It is found that the ${}^3$H$/$${}^3$He ratio is sensitive to the nuclear symmetry energy at sub-saturation densities. Model calculations with moderately soft to linear symmetry energies are in agreement with the experimental FOPI data. This result is in line with both, the recent constraints on the low-density symmetry energy available in the literature and our previous results for the high-density symmetry energy obtained with the elliptic flow of free nucleons and hydrogen isotopes as a sensitive probe.

   ↳ nucl-thnucl-exEPJA(2015)·27 citations
6. 06*

   Toward global beyond-mean-field calculations of nuclear masses and low-energy spectra

   Tomás R. Rodríguez🇩🇪 · Alexander Arzhanov · Gabriel Martínez-Pinedo🇩🇪

   Self-consistent mean field (MF) and beyond-mean-field (BMF) calculations of masses, separation energies and $2_1^{+}$ excitation energies of even-even nuclei where experimental data is available are presented. The functionals used are based on the Gogny D1S and D1M parametrizations and the method includes beyond-mean-field corrections coming from both axial quadrupole shape mixing and symmetry restorations without assuming gaussian overlap approximations. A comparison between mean field, beyond-mean-field approaches and the experimental data is provided. Additionally, the convergence of the results and the possible reduction of the magic shell gaps by including BMF effects are also discussed.

   ↳ nucl-thnucl-exPRC(2015)·51 citations
7. 07*

   Triton binding energy with realistic precision

   R. Navarro Perez🇪🇸 · E. Garrido🇪🇸 · J. E. Amaro🇪🇸 · E. Ruiz Arriola🇪🇸

   We compute the binding energy of triton with realistic statistical errors stemming from NN scattering data uncertainties and the deuteron and obtain $E_t=-7.638(15)\mathrm{MeV}$. Setting the numerical precision as $\Delta E_t^{\mathrm{num}}\lesssim 1\mathrm{keV}$ we obtain the statistical error $\Delta E_t^{\mathrm{stat}}=15(1)\mathrm{keV}$ which is mainly determined by the channels involving relative S-waves. This figure reflects the uncertainty of the input NN data, more than two orders of magnitude larger than the experimental precision $\Delta E_t^{\exp }=0.1\mathrm{keV}$ and provides a bottleneck in the realistic precision that can be reached. This suggests an important reduction in the numerical precision and hence in the computational effort.

   ↳ nucl-thhep-phnucl-exPRC(2014)·23 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.