Fri·Feb 6, 2015Friday·February 6, 2015

1. 01*

   Double Spin Asymmetries of Inclusive Hadron Electroproductions from a Transversely Polarized ${}^3\mathrm{He}$ Target

   The Jefferson Lab Hall A Collaboration: Y.X. Zhao🇨🇳 · K. Allada🇺🇸 · K. Aniol🇺🇸 · J.R.M. Annand🇬🇧 · T. Averett🇺🇸 · F. Benmokhtar🇺🇸 · W. Bertozzi🇺🇸 · P.C. Bradshaw🇺🇸 · P. Bosted🇺🇸 · A. Camsonne🇺🇸 · M. Canan🇺🇸 · G.D. Cates🇺🇸 and 104 other authors

   We report the measurement of beam-target double-spin asymmetries ($A_{\text{LT}}$) in the inclusive production of identified hadrons, $\vec{e}$+${}^3{\text{He}}^{\uparrow }\to h+X$, using a longitudinally polarized 5.9 GeV electron beam and a transversely polarized ${}^3\mathrm{He}$ target. Hadrons (${\pi }^{\pm }$, $K^{\pm }$ and proton) were detected at 16${}^{\circ }$ with an average momentum $<$$P_h$$>$=2.35 GeV/c and a transverse momentum ($p_T$) coverage from 0.60 to 0.68 GeV/c. Asymmetries from the ${}^3\text{He}$ target were observed to be non-zero for ${\pi }^{\pm }$ production when the target was polarized transversely in the horizontal plane. The ${\pi }^{+}$ and ${\pi }^{-}$ asymmetries have opposite signs, analogous to the behavior of $A_{\text{LT}}$ in semi-inclusive deep-inelastic scattering.

   nucl-exhep-exhep-phPRC(2015)·15 citations
2. 02*

   Verification of Monte Carlo transport codes against measured small angle p-, d-, and t-emission in carbon fragmentation at 600 MeV/nucleon

   B. M. Abramov🇷🇺 · P. N. Alexeev · Yu. A. Borodin🇷🇺 · S. A. Bulychjov🇷🇺 · I. A. Dukhovskoy🇷🇺 · A. P. Krutenkova · V. V. Kulikov🇷🇺 · M. A. Martemianov · M. A. Matsyuk🇷🇺 · E. N. Turdakina · A. I. Khanov🇺🇸 · S. G. Mashnik🇺🇸

   Momentum spectra of hydrogen isotopes have been measured at 3.5 deg from C12 fragmentation on a Be target. Momentum spectra cover both the region of fragmentation maximum and the cumulative region. Differential cross sections span five orders of magnitude. The data are compared to predictions of four Monte Carlo codes: QMD, LAQGSM, BC, and INCL++. There are large differences between the data and predictions of some models in the high momentum region. The INCL++ code gives the best and almost perfect description of the data.

   nucl-exPoS(2015)·0 citations
3. 03*

   Identified Two-particle Correlations and Quantum Number Conservations in p-p and Pb-Pb Collisions at LHC Energies

   Gyula Bencédi🇭🇺 · Gergely Gábor Barnaföldi🇭🇺 · Levente Molnár🇫🇷

   In this paper we continue the investigation of the effect of quantum number conservations of pions, kaons, and protons, with very high transverse momenta (up to 25 GeV/c), during parton fragmentation and hadronization in p-p and Pb-Pb collisions at LHC energies. The strength of the conservation effects are studied by identified two-particle correlations in Monte Carlo generated events in the mid-rapidity region ($|\eta |<1$). The simulated p-p events were generated with PYTHIA 8, using its main default settings, at $\sqrt{s}=200$~GeV, $\sqrt{s}=2.76$~TeV, $\sqrt{s}=7$~TeV, and $\sqrt{s}=14$~TeV. In parallel to this, HIJING 1.36 was used to generate Pb-Pb events at $\sqrt{s_{\mathrm{NN}}}=2.76$~TeV with centralities $0-10\%$, $30-40\%$ and $80-90\%$. The extracted identified associated hadron spectra for charged pion, kaon, and proton show identified trigger-hadron dependent splitting between oppositely charged associated particle species in any nucleus-nucleus collisions. The Pb-Pb data exhibits a peculiar splitting pattern as a function of the transverse momentum of the associated particle $p_{T,assoc}$ both on the near and away side that is different from the patterns observed in p-p collisions. The splitting shows smooth evolution with collision energy and event multiplicity in p-p collisions while in Pb-Pb collisions different trend were observed for kaons and protons.

   ↳ hep-exnucl-exJ.Phys.Conf.Ser.(2017)·1 citation
4. 04*

   ORIGAMIX, a CdTe-based spectro-imager development for nuclear applications

   S. Dubos · H. Lemaire · S. Schanne · O. Limousin🇫🇷 · F. Carrel · V. Schoepff · C. Blondel🇫🇷

   The Astrophysics Division of CEA Saclay has a long history in the development of CdTe based pixelated detection planes for X and gamma-ray astronomy, with time-resolved imaging and spectrometric capabilities. The last generation, named Caliste HD, is an all-in-one modular instrument that fulfills requirements for space applications. Its full-custom front-end electronics is designed to work over a large energy range from 2 keV to 1 MeV with excellent spectroscopic performances, in particular between 10 and 100 keV (0.56 keV FWHM and 0.67 keV FWHM at 13.9 and 59.5 keV). In the frame of the ORIGAMIX project, a consortium based on research laboratories and industrials has been settled in order to develop a new generation of gamma camera. The aim is to develop a system based on the Caliste architecture for post-accidental interventions or homeland security, but integrating new properties (advanced spectrometry, hybrid working mode) and suitable for industry. A first prototype was designed and tested to acquire feedback for further developments. In this study, we particularly focused on spectrometric performances with high energies and high fluxes. Therefore, our device was exposed to energies up to 700 keV (133Ba, 137Cs) and we measured the evolution of energy resolution (0.96 keV at 80 keV, 2.18 keV at 356 keV, 3.33 keV at 662 keV). Detection efficiency decreases after 150 keV, as Compton effect becomes dominant. However, CALISTE is also designed to handle multiple events, enabling Compton scattering reconstruction, which can drastically improve detection efficiencies and dynamic range for higher energies up to 1408 keV (22Na, 60Co, 152Eu) within a 1-mm thick detector. In particular, such spectrometric performances obtained with 152Eu and 60Co were never measured before with this kind of detector.

   ↳ physics.ins-detnucl-exNucl.Instrum.Meth.A(2015)·2 citations
5. 05*

   Relativistic density functional theory for finite nuclei and neutron stars

   J. Piekarewicz🇺🇸

   The main goal of the present contribution is a pedagogical introduction to the fascinating world of neutron stars by relying on relativistic density functional theory. Density functional theory provides a powerful--and perhaps unique--framework for the calculation of both the properties of finite nuclei and neutron stars. Given the enormous densities that may be reached in the core of neutron stars, it is essential that such theoretical framework incorporates from the outset the basic principles of Lorentz covariance and special relativity. After a brief historical perspective, we present the necessary details required to compute the equation of state of dense, neutron-rich matter. As the equation of state is all that is needed to compute the structure of neutron stars, we discuss how nuclear physics--particularly certain kind of laboratory experiments--can provide significant constrains on the behavior of neutron-rich matter.

   ↳ nucl-thastro-ph.SRnucl-exInt.Rev.Nucl.Phys.(2016)·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.