Mon·Dec 12, 2016Monday·December 12, 2016

1. 01*

   Determination of energy of nn-singlet virtual state in d+2H->p+p+n+n reaction

   E. Konobeevski · A. Kasparov · M. Mordovskoy · S. Zuyev · V. Lebedev · A. Spassky

   The nn final state interaction has been investigated in d+2H->(pp)S+(nn)S->p+p+n+n reaction going through a formation and breakup of singlet diproton and dineutron in the intermediate state. In the kinematically complete experiment performed at Ed =15 MeV two proton and neutron were detected at angles close to those of emission of (pp)S and (nn)S systems. Simulation of the reaction showed that the shape of neutron energy (timing) spectrum depends on epsnn - the energy of virtual 1S0 state of nn-system. The most likely value epsnn = 0.076 +/- 0.006 MeV was obtained by fitting procedure using the experimental data and simulations. This low value of epsnn evidently indicates on effective enhancement of nn-interaction in the intermediate state of studied reaction

   nucl-exnucl-thFew Body Syst.(2017)·2 citations
2. 02*

   Probing cold nuclear matter effects with weak gauge boson production in ultra-relativistic heavy-ion collisions

   Peng Ru🇨🇳 · Ben-Wei Zhang🇨🇳

   Within the framework of pQCD, we systematically study the $W^{\pm }/Z^0$ boson production as a probe of cold nuclear matter effects and nuclear parton distributions in p+Pb and Pb+Pb collisions at the LHC and future colliders. A detailed analysis at partonic level is performed. Moreover, with a semi-microscopic KP model of NPDFs, in which several nuclear effects (e.g. Fermi motion and nuclear binding, the off-shell correction, the nuclear coherent correction, and the nuclear meson correction) are included, we study the vector boson rapidity distribution in p+Pb collisions at the LHC, and a very good agreement with the latest data is found, including the $W$-boson charge asymmetry.

   ↳ nucl-thhep-phnucl-exNucl.Part.Phys.Proc.(2017)·2 citations
3. 03*

   Improved WKB approximation for quantum tunneling: Application to heavy ion fusion

   A. J. Toubiana🇧🇷 · L. F. Canto🇧🇷 · M. S. Hussein🇧🇷

   In this paper we revisit the one-dimensional tunneling problem. We consider Kemble's approximation for the transmission coefficient. We show how this approximation can be extended to above-barrier energies by performing the analytical continuation of the radial coordinate to the complex plane. We investigate the validity of this approximation by comparing their predictions for the cross section and for the barrier distribution with the corresponding quantum mechanical results. We find that the extended Kemble's approximation reproduces the results of quantum mechanics with great accuracy.

   ↳ nucl-thnucl-exphysics.atom-phEPJA(2017)·11 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.