Fri·Sep 2, 2011Friday·September 2, 2011

1. 01*

   Facilities for the Energy Frontier of Nuclear Physics

   John M. Jowett🇨🇭

   The Relativistic Heavy Ion Collider at BNL has been exploring the energy frontier of nuclear physics since 2001. Its performance, flexibility and continued innovative upgrading can sustain its physics output for years to come. Now, the Large Hadron Collider at CERN is about to extend the frontier energy of laboratory nuclear collisions by more than an order of magnitude. In the coming years, its physics reach will evolve towards still higher energy, luminosity and varying collision species, within performance bounds set by accelerator technology and by nuclear physics itself. Complementary high-energy facilities will include fixed-target collisions at the CERN SPS, the FAIR complex at GSI and possible electron-ion colliders based on CEBAF at JLAB, RHIC at BNL or the LHC at CERN.

   nucl-exphysics.acc-phJ.Phys.Conf.Ser.(2011)·4 citations
2. 02*

   The light nuclei spin structure from hadronic channels at intermediate energies

   P. K. Kurilkin🇷🇺 · V. P. Ladygin🇷🇺 · T. Uesaka🇯🇵 · V. V. Glagolev🇷🇺 · Yu. V. Gurchin🇷🇺 · A. Yu. Isupov🇷🇺 · K. Itoh🇯🇵 · M. Janek · J. T. Karachuk🇷🇺 · T. Kawabata🇯🇵 · A. N. Khrenov🇷🇺 · A. S. Kiselev and 25 other authors

   The investigation of the d, 3H and 3He spin structure has been performed at the RIKEN(Japan) accelerator research facility and VBLHEP(JINR) using both polarized and unpolarized deuteron beams. The experimental results on the analyzing powers studies in dp- elastic scattering, d(d,3H)p and d(d,3He)n reactions are presented. The vector and tensor analyzing powers for dp-elastic scattering at 880 and 2000 MeV are obtained at the Nuclotron(VBLHEP). The result on the analyzing powers Ay, Ayy of the deuteron at 2000 MeV are compared with relativistic multiple scattering model calculations. The data on the tensor analyzing powers for the d(d,3H)p and d(d,3He)n reactions obtained at Ed = 200 and 270 MeV demonstrate the sensitivity to the 3H, 3He and deuteron spin structure. The essential disagreements between the experimental results and the theoretical calculations within the one-nucleon exchange model framework are observed. The wide experimental program on the study of the polarization effects in dp- elastic scattering, dp-nonmesonic breakup, d(d,3He)n, d(d,3H)p and d(3He,4He)p reactions using internal and extracted beam at Nuclotron is discussed.

   nucl-ex0 citations
3. 03*

   Comparison of inclusive K+ production in proton-proton and proton-neutron collisions

   Yu. Valdau🇩🇪 · V. Koptev🇷🇺 · S. Barsov🇷🇺 · M. Buescher🇩🇪 · A. Dzyuba🇷🇺 · M. Hartmann🇩🇪 · A. Kacharava🇩🇪 · I. Keshelashvili🇨🇭 · A. Khoukaz🇩🇪 · S. Mikirtychiants🇷🇺 · M. Nekipelov🇩🇪 · A. Polyanskiy🇩🇪 and 4 other authors

   The momentum spectra of K+ produced at small angles in proton-proton and proton-deuteron collisions have been measured at four beam energies, 1.826, 1.920, 2.020, and 2.650 GeV, using the ANKE spectrometer at COSY-Juelich. After making corrections for Fermi motion and shadowing, the data indicate that K+ production near threshold is stronger in pp- than in pn-induced reactions. However, most of this difference could be made up by the unobserved K0 production in the pn case.

   nucl-exhep-exnucl-thPRC(2011)·5 citations
4. 04*

   Exploring the nucleon structure through GPDs and TDAs in hard exclusive processes

   B. Pire🇫🇷 · K. Semenov-Tian-Shansky🇫🇷 · L. Szymanowski🇵🇱 · J. Wagner🇵🇱

   Generalized Parton Distributions (GPDs) offer a new way to access the quark and gluon nucleon structure. We review recent progress in this domain, emphasizing the need to supplement the experimental study of deeply virtual Compton scattering by its crossed version, timelike Compton scattering. We also describe the extension of the GPD concept to three quark operators and the relevance of their nucleon to meson matrix elements, namely the transition distribution amplitudes (TDAs) which factorize in backward meson electroproduction and related processes. We discuss the main properties of the TDAs. \

   ↳ hep-phhep-exnucl-exnucl-th2 citations
5. 05*

   Charge radii and neutron correlations in helium halo nuclei

   G. Papadimitriou🇺🇸 · A.T. Kruppa🇭🇺 · N. Michel🇫🇮 · W. Nazarewicz🇺🇸 · M. Płoszajczak🇫🇷 · J. Rotureau🇺🇸

   Within the complex-energy configuration interaction framework, we study correlations of valence neutrons to explain the behavior of charge radii in the neutron halo nuclei ${}^{6,8}$He. We find that the experimentally observed decrease of the charge radius between ${}^6$He and ${}^8$He is caused by a subtle interplay between three effects: dineutron correlations, a spin-orbit contribution to the charge radius, and a core swelling effect. We demonstrate that two-neutron angular correlations in the $2_1^{+}$ resonance of ${}^6$He differ markedly from the ground-state correlations in ${}^{6,8}$He.

   ↳ nucl-thnucl-exPRC(2011)·71 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.