Mon·Jun 18, 2018Monday·June 18, 2018

1. 01*

   Two- and three-pion Levy femtoscopy with PHENIX

   Mate Csanad (for the PHENIX Collaboration)🇭🇺

   The last decades of high energy physics revealed, that in ultra-relativistic ion-ion collisions, a strongly interacting quark gluon plasma (sQGP) is created. Varying the collision energy allows for the investigation of the phase diagram of QCD matter. The nature of the quark-hadron transition can be studied via femtoscopy, as the investigation of momentum correlations in heavy ion reactions reveals the space-time structure of the hadron production of the sQGP. Going beyond the Gaussian assumption the shape of this source may be described by Lévy distributions. In this paper we report on recent femtoscopic measurements of PHENIX, utilizing Lévy sources.

   nucl-exJ.Phys.Conf.Ser.(2018)·6 citations
2. 02*

   Measurement of cross sections and astrophysical S-factors for d(p,gamma)3He reaction at astrophysically relevant energies using a large volume LaBr3:Ce detector

   M. Dhibar · I. Mazumdar · G. Anil Kumar · A. K. Rhine Kumar🇮🇳 · S. M. Patel · P. B. Chavan · C. D. Bagdia · L.C. Trivedi

   In nuclear astrophysics, the experimental scenario is still unclear for BBN relevant energies from 30-300 keV. Here, we report our measurements of cross section and astrophysical S(E) factor for pd capture reaction using proton beam energies 66 keV, 116 keV and 166 keV. Realistic GEANT4 simulations were carried out in order to estimate the energy dependent efficiency of the detector. The measured cross section and astrophysical S(E) factor for three new incident proton energies are found to be in good agreement, within the errors, with the values reported in the literature.

   nucl-ex1 citation
3. 03*

   Comments on the ${}^{12}\mathrm{C}$-${}^{12}\mathrm{C}$ fusion S*-factor

   Akram Mukhamedzhanov · Xiaodong Tang · Danyang Pang🇨🇳

   The goal of this Comment is to draw attention of the readers that the results in the published letter [A Tumino {et al,}, Nature {\bf 557}, 687 (2018)] regarding ${}^{12}\mathrm{C}-{}^{12}\mathrm{C}$ fusion are not correct

   nucl-ex9 citations
4. 04*

   Centrality dependence of kinetic freeze-out temperature and transverse flow velocity in high energy nuclear collisions

   Muhammad Waqas🇨🇳 · Fu-Hu Liu🇨🇳

   Centrality-dependent double-differential transverse momentum spectra of charged pions, kaons, and (anti)protons produced in mid-pseudorapidity interval in $\sqrt{s_{NN}}=200$ GeV gold-gold and deuteron-gold collisions with different centralities are analyzed by the blast-wave model with Boltzmann-Gibbs statistics. Meanwhile, the mentioned spectra in mid-rapidity interval in $\sqrt{s_{NN}}=2.76$ TeV lead-lead and $\sqrt{s_{NN}}=5.02$ TeV proton-lead collisions with different centralities are analyzed by the same model. The model results are approximately in agreement with the experimental data in special transverse momentum ranges. It is shown that with the increase of event centrality and energy, the kinetic freeze-out temperature of the emission source and the transverse flow velocity of the produced particles slightly increase in some cases but they do not give an obvious change in other cases. Meanwhile, the kinetic freeze-out temperature (transverse flow velocity) increases (decreases) with the increase of particle mass. The average transverse momentum and initial temperature increase with the increase of event centrality, collision energy, and particle mass. This work also confirms the maximum size dependent effect, which states that the main parameters such as the kinetic freeze-out temperature and transverse flow velocity are mainly determined by the heaviest nucleus from proton-nucleus to nucleus-nucleus collisions.

   ↳ hep-phhep-exnucl-exnucl-thIndian J.Phys.(2022)·26 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.