Tue·Jun 28, 2011Tuesday·June 28, 2011

1. 01*

   Experimental study of fragmentation products in the reactions 112Sn + 112Sn and 124Sn + 124Sn at 1 AGeV

   V. Föhr🇩🇪 · A. Bacquias🇩🇪 · E. Casarejos🇪🇸 · T. Enqvist🇩🇪 · A. R. Junghans🇩🇪 · A. Kelić-Heil🇩🇪 · T. Kurtukian🇪🇸 · S. Lukić🇩🇪 · D. Pérez-Loureiro🇪🇸 · R. Pleskač🇩🇪 · M. V. Ricciardi🇩🇪 · K.-H. Schmidt🇩🇪 · J. Taïeb🇫🇷

   Production cross-sections and longitudinal velocity distributions of the projectile-like residues produced in the reactions 112Sn + 112Sn and 124Sn + 124Sn both at an incident beam energy of 1 AGeV were measured with the high-resolution magnetic spectrometer, the Fragment Separator (FRS) of GSI. For both reactions the characteristics of the velocity distributions and nuclide production cross sections were determined for residues with atomic number Z $\ge$ 10. A comparison of the results of the two reactions is presented.

   nucl-exPRC(2011)·23 citations
2. 02*

   Charged particle directed flow in Pb-Pb collisions at sqrt{s_NN} = 2.76 TeV measured with ALICE at the LHC

   Ilya Selyuzhenkov (for the ALICE Collaboration)🇩🇪

   Charged particle directed flow at midrapidity, |eta|<0.8, and forward rapidity, 1.7 < |eta|<5.1, is measured in Pb-Pb collisions at sqrt{s_NN} = 2.76 TeV with ALICE at the LHC. Directed flow is reported as a function of collision centrality, charged particle transverse momentum, and pseudo-rapidity. Results are compared to measurements at RHIC and recent model calculations for LHC energies.

   nucl-exJ.Phys.G(2011)·28 citations
3. 03*

   Deciphering nonfemtoscopic two-pion correlations in $p+p$ collisions with simple analytical models

   S.V. Akkelin🇺🇦 · Yu.M. Sinyukov🇺🇦

   A simple model of nonfemtoscopic particle correlations in proton-proton collisions is proposed. The model takes into account correlations induced by the conservation laws as well as correlations induced by minijets. It reproduces well the two-pion nonfemtoscopic correlations of like-sign and unlike-sign pions in proton-proton collision events at $\sqrt{s}=900$ GeV analyzed by the ALICE Collaboration. We also argue that similar nonfemtoscopic correlations can appear in the hydrodynamic picture with event-by-event fluctuating nonsymmetric initial conditions that are typically associated with nonzero higher-order flow harmonics.

   ↳ hep-phhep-exnucl-exnucl-thPRD(2012)·5 citations
4. 04*

   Study of the neutron skin thickness of ${}^{208}$Pb in mean field models

   X. Roca-Maza🇮🇹 · M. Centelles🇪🇸 · X. Viñas🇪🇸 · M. Warda🇵🇱

   We study whether the neutron skin thickness $\Delta r_{np}$ of ${}^{208}$Pb originates from the bulk or from the surface of the neutron and proton density distributions in mean field models. We find that the size of the bulk contribution to $\Delta r_{np}$ of ${}^{208}$Pb strongly depends on the slope of the nuclear symmetry energy, while the surface contribution does not. We note that most mean field models predict a neutron density for ${}^{208}$Pb between the halo and skin type limits. We investigate the dependence of parity- violating electron scattering at the kinematics of the PREX experiment on the shape of the nucleon densities predicted by the mean field models for ${}^{208}$Pb. We find an approximate formula for the parity-violating asymmetry in terms of the central radius and the surface diffuseness of the nucleon densities of ${}^{208}$Pb in these models.

   ↳ nucl-thnucl-exJ.Phys.Conf.Ser.(2011)·1 citation
5. 05*

   Asymptotic behavior of pion form factors

   Mikhail Gorchtein🇺🇸 · Peng Guo🇺🇸 · Adam P. Szczepaniak🇺🇸

   We consider the electromagnetic and transition pion form factors. Using dispersion relations we simultaneously describe both the hadronic, time-like region and the asymptotic region of large energy-momentum transfer. For the latter we propose a novel mechanism of Regge fermion exchange.

   ↳ hep-phhep-exnucl-exnucl-th2 citations
6. 06*

   Predicted charged charmonium-like structures in the hidden-charm dipion decay of higher charmonia

   Dian-Yong Chen🇨🇳 · Xiang Liu🇨🇳

   In this work, we predict two charged charmonium-like structures close to the $D^{\ast }\bar{D}$ and $D^{\ast }{\bar{D}}^{\ast }$ thresholds, where the Initial Single Pion Emission mechanism is introduced in the hidden-charm dipion decays of higher charmonia $\psi (4040)$, $\psi (4160)$, $\psi (4415)$ and charmonium-like state Y(4260). We suggest BESIII to search for these structures in the $J/\psi {\pi }^{+}$, $\psi (2S){\pi }^{+}$ and $h_b(1P){\pi }^{+}$ invariant mass spectra of the $\psi (4040)$ decays into $J/\psi {\pi }^{+}{\pi }^{-}$, $\psi (2S){\pi }^{+}{\pi }^{-}$ and $h_b(1P){\pi }^{+}{\pi }^{-}$. In addition, the experimental search for these structures in the $J/\psi {\pi }^{+}$, $\psi (2S){\pi }^{+}$ and $h_c(1P){\pi }^{+}$ invariant mass spectra of the $\psi (4260)$ hidden-charm dipion decays will be accessible at Belle and BaBar.

   ↳ hep-phhep-exnucl-exnucl-thPRD(2011)·81 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.