Thu·Apr 2, 2020Thursday·April 2, 2020

1. 01*

   $\beta$-Decay Half-Lives of 55 Neutron-Rich Isotopes beyond the N=82 Shell Gap

   J. Wu🇺🇸 · S. Nishimura🇯🇵 · P. Möller🇺🇸 · M. R. Mumpower🇺🇸 · R. Lozeva🇫🇷 · C. B. Moon🇰🇷 · A. Odahara🇯🇵 · H. Baba🇯🇵 · F. Browne🇯🇵 · R. Daido🇯🇵 · P. Doornenbal🇯🇵 · Y. F. Fang🇯🇵 and 39 other authors

   The $\beta$-decay half-lives of 55 neutron-rich nuclei ${}^{134-139}$Sn, ${}^{134-142}$Sb, ${}^{137-144}$Te, ${}^{140-146}$I, ${}^{142-148}$Xe, ${}^{145-151}$Cs, ${}^{148-153}$Ba, ${}^{151-155}$La were measured at the Radioactive Isotope Beam Factory (RIBF) employing the projectile fission fragments of ${}^{238}$U. The nuclear level structure, which relates to deformation, has a large effect on the half-lives. The impact of newly-measured half-lives on modeling the astrophysical origin of the heavy elements is studied in the context of $r$ process nucleosynthesis. For a wide variety of astrophysical conditions, including those in which fission recycling occurs, the half-lives have an important local impact on the second ($A$ $\approx$ 130) peak.

   nucl-exPRC(2020)·35 citations
2. 02*

   Chirality and Magnetic Field

   Defu Hou🇨🇳 · Anping Huang🇺🇸 · Jinfeng Liao🇺🇸 · Shuzhe Shi🇨🇦 · Hui Zhang🇨🇳

   We present a brief overview on recent developments of theory and phenomenology for novel many-body phenomena related to the chirality and magnetic field, with an emphasis on their experimental implications and possible detection in relativistic nuclear collisions.

   ↳ nucl-thhep-phnucl-exNPA(2021)·4 citations
3. 03*

   Measurement of quark- and gluon-like jet fractions using jet charge in PbPb and pp collisions at 5.02 TeV

   CMS Collaboration

   The momentum-weighted sum of the electric charges of particles inside a jet, known as jet charge, is sensitive to the electric charge of the particle initiating the parton shower. This paper presents jet charge distributions in $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV lead-lead (PbPb) and proton-proton (pp) collisions recorded with the CMS detector at the LHC. These data correspond to integrated luminosities of 404 $\mu$b${}^{-1}$ and 27.4 pb${}^{-1}$ for PbPb and pp collisions, respectively. Leveraging the sensitivity of the jet charge to fundamental differences in the electric charges of quarks and gluons, the jet charge distributions from simulated events are used as templates to extract the quark- and gluon-like jet fractions from data. The modification of these jet fractions is examined by comparing pp and PbPb data as a function of the overlap of the colliding Pb nuclei (centrality). This measurement tests the color charge dependence of jet energy loss due to interactions with the quark-gluon plasma. No significant modification between different centrality classes and with respect to pp results is observed in the extracted fractions of quark- and gluon-like jet fractions.

   ↳ hep-exnucl-exJHEP(2020)·50 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.