Wed·Sep 7, 2016Wednesday·September 7, 2016

1. 01*

   Measurement of the Two-Neutrino Double Beta Decay Half-life of ${}^{130}$Te with the CUORE-0 Experiment

   CUORE Collaboration: C. Alduino🇺🇸 · K. Alfonso🇺🇸 · D. R. Artusa🇺🇸 · F. T. Avignone III🇺🇸 · O. Azzolini🇮🇹 · T. I. Banks🇺🇸 · G. Bari🇮🇹 · J.W. Beeman🇺🇸 · F. Bellini🇮🇹 · A. Bersani🇮🇹 · M. Biassoni🇮🇹 · A. Branca and 113 other authors

   We report on the measurement of the two-neutrino double beta decay half-life of ${}^{130}$Te with the CUORE-0 detector. From an exposure of 33.4 kg$\cdot$y of TeO${}_2$, the half-life is determined to be $T_{1/2}^{2\nu }$ = [8.2 $\pm$ 0.2 (stat.) $\pm$ 0.6 (syst.)] $\times$ 10${}^{20}$y. This result is obtained after a detailed reconstruction of the sources responsible for the CUORE-0 counting rate, with a specific study of those contributing to the ${}^{130}$Te neutrinoless double beta decay region of interest.

   nucl-exEPJC(2017)·136 citations
2. 02*

   Isospin dependence of nucleon effective masses in neutron-rich matter

   Bao-An Li🇺🇸 · Bao-Jun Cai🇺🇸 · Lie-Wen Chen🇨🇳 · Xiao-Hua Li🇨🇳

   In this talk, we first briefly review the isospin dependence of the total nucleon effective mass $M_J^{\ast }$ inferred from analyzing nucleon-nucleus scattering data within an isospin dependent non-relativistic optical potential model, and the isospin dependence of the nucleon E-mass $M_J^{\ast ,\mathrm{E}}$ obtained from applying the Migdal-Luttinger theorem to a phenomenological single-nucleon momentum distribution in nuclei constrained by recent electron-nucleus scattering experiments. Combining information about the isospin dependence of both the nucleon total effective mass and E-mass, we then infer the isospin dependence of nucleon k-mass using the well-known relation $M_J^{\ast }=M_J^{\ast ,\mathrm{E}}\cdot M_J^{\ast ,\mathrm{k}}$. Implications of the results on the nucleon mean free path (MFP) in neutron-rich matter are discussed.

   ↳ nucl-thastro-ph.SRnucl-exNucl.Sci.Tech.(2016)·10 citations
3. 03*

   Baryon Number Fluctuations in Quasi-particle Model

   Ameng Zhao🇨🇳 · Xiaofeng Luo🇨🇳 · Hongshi Zong🇨🇳

   Baryon number fluctuations are sensitive to the QCD phase transition and QCD critical point. According to the Feynman rules of finite-temperature field theory, we calculated various order moments and cumulants of the baryon number distributions in the quasi-particle model of quark gluon plasma. Furthermore, we compared our results with the experimental data measured by the STAR experiment at RHIC. It is found that the experimental data can be well described by the model for the colliding energies above 30 GeV and show large discrepancies at low energies. It can put new constraint on qQGP model and also provide a baseline for the QCD critical point search in heavy-ion collisions at low energies.

   ↳ nucl-thhep-exhep-phnucl-exEPJC(2017)·6 citations
4. 04*

   Microscopic phase-space exploration modeling of ${}^{258}$Fm spontaneous fission

   Yusuke Tanimura🇫🇷 · Denis Lacroix🇫🇷 · Sakir Ayik🇺🇸

   We show that the total kinetic energy (TKE) of nuclei after the spontaneous fission of ${}^{258}$Fm can be well reproduced using simple assumptions on the quantum collective phase-space explored by the nucleus after passing the fission barrier. Assuming energy conservation and phase-space exploration according to the stochastic mean-field approach, a set of initial densities is generated. Each density is then evolved in time using the nuclear time-dependent density-functional theory. This approach goes beyond mean-field by allowing spontaneous symmetry breaking as well as a wider dynamical phase-space exploration leading to larger fluctuations in collective space. The total kinetic energy and mass distributions are calculated. New information on the fission process: fluctuations in scission time, strong correlation between TKE and collective deformation of daughter nuclei as well as pre- and post-scission particle emission, are obtained.

   ↳ nucl-thnucl-exPRL(2017)·102 citations
5. 05*

   Search for formation of isospin-3/2 $\Xi$ states by neutrinos

   A. E. Asratyan🇷🇺

   A narrow peak near 1870 MeV is observed in the combined invariant-mass spectrum of the systems $\Lambda K_S^0{\pi }^{-}$, $\Lambda K_S^0{\pi }^{+}$, $\Lambda K^{-}{\pi }^{-}$, and $\Lambda K^{-}{\pi }^{+}$ formed in ${\nu }_{\mu }$- and $\overline{{\nu }_{\mu }}$-induced charged-current collisions with free protons, deuterons, and Neon nuclei. Observed width of the resonance is consistent with being entirely due to apparatus smearing. A possible interpretation of the peak is formation and three-body $\Lambda K\pi$ decay of an exotic baryon with $I=3/2$ and $S=-2$.

   ↳ hep-exnucl-ex0 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.