Thu·Oct 16, 2014Thursday·October 16, 2014

1. 01*

   Heavy Flavor Measurements at STAR

   Robert Vertesi (for the STAR collaboration)🇨🇿

   We present a selection of recent heavy flavor results from the STAR experiment. Measurements of $D^0$ and $D^{\ast }$ meson production in $\sqrt{s}$=200 and 500 GeV p+p, as well as in $\sqrt{s_{NN}}$=200 GeV d+Au, Au+Au and 193 \GeV U+U collisions are presented and implications on the production mechanism are discussed. We report on the production and elliptic flow of electrons from semi-leptonic decays of heavy flavor hadrons in \snn{}=39, 62.4 and 200 GeV Au+Au collisions. Nuclear modification of $J/\psi$ production in $\sqrt{s_{NN}}$=39, 62.4 and 200 GeV Au+Au, and 193 GeV U+U, and of ${\rm Y}$ in 200 GeV d+Au, Au+Au, and 193 GeV U+U collisions are compared to theoretical models. Finally we discuss the prospects of heavy flavor measurements with the recent detector upgrades.

   nucl-exNucl.Part.Phys.Proc.(2016)·7 citations
2. 02*

   On Ruby's solid angle formula and some of its generalizations

   Samuel Friot🇫🇷

   Using the Mellin-Barnes representation, we show that Ruby's solid angle formula and some of its generalizations may be expressed in a compact way in terms of the Appell F4 and Lauricella Fc functions.

   nucl-exnucl-thNucl.Instrum.Meth.A(2015)·7 citations
3. 03*

   Unified Description of Efficiency Correction and Error Estimation for Moments of Conserved Quantities in Heavy-Ion Collisions

   Xiaofeng Luo🇨🇳

   We provide a unified description of efficiency correction and error estimation for moments of conserved quantifies in heavy-ion collisions. Moments and cumulants are expressed in terms of the factorial moments, which can be easily corrected for the efficiency effect. By deriving the covariance between factorial moments, one can obtain the general error formula for the efficiency corrected moments based on the error propagation derived from the Delta theorem. The skellam distribution based Monto Carlo simulation is used to test the Delta theorem and Bootstrap error estimation methods. The statistical errors calculated from the two methods can well reflect the statistical fluctuations of the efficiency corrected moments.

   ↳ physics.data-anhep-exnucl-exnucl-thPRC(2015)·105 citations
4. 04*

   Characterization of neutron transmutation doped (NTD) Ge for low temperature sensor development

   S. Mathimalar🇮🇳 · V. Singh🇮🇳 · N. Dokania🇮🇳 · V. Nanal🇮🇳 · R.G. Pillay🇮🇳 · S. Pal🇮🇳 · S. Ramakrishnan🇮🇳 · A. Shrivastava🇮🇳 · Priya Maheshwari🇮🇳 · P.K. Pujari🇮🇳 · S. Ojha🇮🇳 · D. Kanjilal🇮🇳 · K.C. Jagadeesan🇮🇳 · S.V. Thakare🇮🇳

   Development of NTD Ge sensors has been initiated for low temperature (mK) thermometry in The India-based Tin detector (TIN.TIN). NTD Ge sensors are prepared by thermal neutron irradiation of device grade Ge samples at Dhruva reactor, BARC, Mumbai. Detailed measurements have been carried out in irradiated samples for estimating the carrier concentration and fast neutron induced defects. The Positron Annihilation Lifetime Spectroscopy (PALS) measurements indicated monovacancy type defects for all irradiated samples, while Channeling studies employing RBS with 2 MeV alpha particles, revealed no significant defects in the samples exposed to fast neutron fluence of $\sim 4\times 10^{16}/c{m}^2$. Both PALS and Channeling studies have shown that vacuum annealing at 600 ${}^{\circ }$C for $\sim 2$ hours is sufficient to recover the damage in the irradiated samples, thereby making them suitable for the sensor development.

   ↳ physics.ins-detnucl-exNucl.Instrum.Meth.B(2015)·13 citations
5. 05*

   Rod-shaped Nuclei at Extreme Spin and Isospin

   P. W. Zhao🇺🇸 · N. Itagaki🇯🇵 · J. Meng🇨🇳

   The anomalous rod shape in carbon isotopes has been investigated in the framework of the cranking covariant density functional theory, and two mechanisms to stabilize such a novel shape with respect to the bending motion, extreme spin, and isospin, are simultaneously discussed for the first time in a self-consistent and microscopic way. By adding valence neutrons and rotating the system, we have found the mechanism stabilizing the rod shape; i.e., the $\sigma$ orbitals (parallel to the symmetry axis) of the valence neutrons, important for the rod shape, are lowered by the rotation due to the Coriolis term. The spin and isospin effects enhance the stability of the rod-shaped configuration. This provides a strong hint that a rod shape could be realized in nuclei towards extreme spin and isospin.

   ↳ nucl-thnucl-exPRL(2015)·106 citations
6. 06*

   Assessing the accuracy of Hartree-Fock-Bogoliubov calculations by use of mass relations

   D. Hove · D.V. Fedorov🇩🇰 · A.S. Jensen🇩🇰 · K. Riisager🇩🇰 · N.T. Zinner🇩🇰

   The accuracy of three different sets of Hartree-Fock-Bogoliubov calculations of nuclear binding energies is systematically evaluated. To emphasize minor fluctuations, a second order, four-point mass relation, which almost completely eliminates smooth aspects of the binding energy, is introduced. Applying this mass relation yields more scattered results for the calculated binding energies. By examining the Gaussian distributions of the non-smooth aspects which remain, structural differences can be detected between measured and calculated binding energies. Substructures in regions of rapidly changing deformation, specifically around $(N,Z)=(60,40)$ and $(90,60)$, are clearly seen for the measured values, but are missing from the calculations. A similar three-point mass relation is used to emphasize odd-even effects. A clear decrease with neutron excess is seen continuing outside the experimentally known region for the calculations.

   ↳ nucl-thnucl-exEPJA(2014)·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.