Wed·Oct 14, 2015Wednesday·October 14, 2015

1. 01*

   Comparing Erlang distribution and Schwinger mechanism on transverse momentum spectra in high energy collisions

   Li-Na Gao🇨🇳 · Fu-Hu Liu🇨🇳

   We study the transverse momentum spectra of J/psi and Upsilon mesons by using two methods: the two-component Erlang distribution and the two-component Schwinger mechanism. The results obtained by the two methods are compared and found to be in agreement with the experimental data of proton-proton (pp), proton-lead (p-Pb), and lead-lead (Pb-Pb) collisions measured by the LHCb and ALICE Collaborations at the large hadron collider (LHC). The related parameters such as the mean transverse momentum contributed by each parton in the first (second) component in the two-component Erlang distribution and the string tension between two partons in the first (second) component in the two-component Schwinger mechanism are extracted.

   ↳ hep-phhep-exnucl-exnucl-thAdv.High Energy Phys.(2016)·8 citations
2. 02*

   Light (anti-)nuclei production and flow in relativistic heavy-ion collisions

   Lilin Zhu🇨🇳 · Che Ming Ko🇺🇸 · Xuejiao Yin🇨🇳

   Using the coalescence model based on the phase-space distributions of protons, neutrons, Lambdas and their antiparticles from a multiphase transport (AMPT) model, we study the production of deuteron, triton, helium 3, hypertriton, hyperhelium 3 and their antinuclei in Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV. The resulting transverse momentum spectra, elliptic flows and coalescence parameters for these nuclei are presented and compared with available experimental data. We also show the constituent number scaled elliptic flows of these nuclei and discuss their implications.

   ↳ nucl-thnucl-exPRC(2015)·81 citations
3. 03*

   Production of $\Lambda$ hyperons in inelastic p+p interactions at 158 GeV/$c$

   A. Aduszkiewicz · Y. Ali · E. Andronov · T. Antićić · N. Antoniou · B. Baatar · F. Bay · A. Blondel · M. Bogomilov · A. Brandin · A. Bravar · J. Brzychczyk and 128 other authors

   Inclusive production of $\Lambda$-hyperons was measured with the large acceptance NA61/SHINE spectrometer at the CERN SPS in inelastic p+p interactions at beam momentum of 158~\GeVc. Spectra of transverse momentum and transverse mass as well as distributions of rapidity and x${}_{{}_F}$ are presented. The mean multiplicity was estimated to be $0.120\pm 0.006(stat.)\pm 0.010(sys.)$. The results are compared with previous measurements and predictions of the EPOS, UrQMD and FRITIOF models.

   ↳ hep-exnucl-exEPJC(2016)·44 citations
4. 04*

   Theoretical corrections and world data for the superallowed ft values in the beta decays of 42Ti, 46Cr, 50Fe and 54Ni

   I.S. Towner🇺🇸 · J.C. Hardy🇺🇸

   Prompted by recent measurements, we have surveyed world data and calculated radiative and isospin-symmetry breaking corrections for the superallowed 0+ -to- 0+ Fermi transitions from 42Ti, 46Cr, 50Fe and 54Ni. This increases the number of such transition with a complete set of calculated corrections from 20 to 23. The results are compared with their equivalents for the mirror superallowed transitions from 42Sc, 46V, 50Mn and 54Co. The predicted ft-value asymmetries of these mirror pairs are sensitive to the correction terms and provide motivation for improving measurement precision so as to be able to test the corrections. To aid in that endeavor, we present a parameterization for calculating the f values for the new transitions to plus/minus 0.01%.

   ↳ nucl-thnucl-exPRC(2015)·18 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.