Thu·Aug 17, 2017Thursday·August 17, 2017

1. 01*

   Nuclear modification factor of D${}^0$ mesons in PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV

   CMS Collaboration

   The transverse momentum ($p_{\mathrm{t}}$) spectrum of prompt D${}^0$ mesons and their antiparticles has been measured via the hadronic decay channels D${}^0\to {\mathrm{K}}^{-}{\pi }^{+}$ and ${\overline{\mathrm{D}}}^0\to {\mathrm{K}}^{+}{\pi }^{-}$ in pp and PbPb collisions at a centre-of-mass energy of 5.02 TeV per nucleon pair with the CMS detector at the LHC. The measurement is performed in the D${}^0$ meson $p_{\mathrm{t}}$ range of 2-100 GeV and in the rapidity range of $|y|<$1. The pp (PbPb) dataset used for this analysis corresponds to an integrated luminosity of 27.4 pb${}^{-1}$ (530 $\mu$b${}^{-1}$). The measured D${}^0$ meson $p_{\mathrm{t}}$ spectrum in pp collisions is well described by perturbative QCD calculations. The nuclear modification factor, comparing D${}^0$ meson yields in PbPb and pp collisions, was extracted for both minimum-bias and the 10% most central PbPb interactions. For central events, the D${}^0$ meson yield in the PbPb collisions is suppressed by a factor of 5-6 compared to the pp reference in the $p_{\mathrm{t}}$ range of 6-10 GeV. For D${}^0$ mesons in the high-$p_{\mathrm{t}}$ range of 60-100 GeV, a significantly smaller suppression is observed. The results are also compared to theoretical calculations.

   nucl-exhep-exPLB(2018)·299 citations
2. 02*

   Threshold and jet radius joint resummation for single-inclusive jet production

   Xiaohui Liu🇨🇳 · Sven-Olaf Moch🇩🇪 · Felix Ringer🇺🇸

   We present the first threshold and jet radius jointly resummed cross section for single-inclusive hadronic jet production. We work at next-to-leading logarithmic accuracy and our framework allows for a systematic extension beyond the currently achieved precision. Longstanding numerical issues are overcome by performing the resummation directly in momentum space within Soft Collinear Effective Theory. We present the first numerical results for the LHC and observe an improved description of the available data. Our results are of immediate relevance for LHC precision phenomenology including the extraction of parton distribution functions and the QCD strong coupling constant.

   ↳ hep-phhep-exnucl-exnucl-thPRL(2017)·64 citations
3. 03*

   Charge symmetry breaking in light $\Lambda$ hypernuclei

   Avraham Gal🇮🇱 · Daniel Gazda🇸🇪

   Charge symmetry breaking (CSB) is particularly strong in the A=4 mirror hypernuclei ${}_{\Lambda }^4$H--${}_{\Lambda }^4$He. Recent four-body no-core shell model calculations that confront this CSB by introducing $\Lambda$-${\Sigma }^0$ mixing to leading-order chiral effective field theory hyperon-nucleon potentials are reviewed, and a shell-model approach to CSB in p-shell $\Lambda$ hypernuclei is outlined.

   ↳ nucl-thhep-phnucl-exJ.Phys.Conf.Ser.(2018)·7 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.