CREAM is a CE program used by many sites based on UMD middleware to handle grid computing jobs. CREAM can be combined with various local batch programs, but it did not work with the HTCondor batch program. Since KISTI has been using HTCondor for many years, we searched another CE program which can work with HTCondor to process grid computing tasks. We proposed HTCondor-CE as the CE program, but it was not smoothly compatible with the UMD middleware environment because the OSG developed the HTCondor-CE software. In 2017, we manually configured HTCondor-CE and deployed a new CMS Tier-2 Center using the HTCondor-CE and a local HT-Condor cluster in the UMD middleware environment. The center has passed a SAM test suite that confirms the CMS computing performance of the center.

A bstract: The first measurement at midrapidity (| y | < 0 . 5) of the production yield of the strange-charm baryons $${\Xi }_{\text{c}}^{+}$$ and $${\Xi }_{\text{c}}^{0}$$ as a function of transverse momentum ( p _T ) in different charged-particle multiplicity classes in proton-proton collisions at $$\sqrt{s}=13$$ TeV with the ALICE experiment at the LHC is reported. The $${\Xi }_{\text{c}}^{+}$$ baryon is reconstructed via the $${\Xi }_{\text{c}}^{+}\to {\Xi }^{-}{\pi }^{+}{\pi }^{+}$$ decay channel in the range 4 < p _T < 12 GeV /c , while the $${\Xi }_{\text{c}}^{0}$$ baryon is reconstructed via both the $${\Xi}_{\text{c}}^{0}\to {\Xi}^{-}{\pi }^{+}$$ and $${\Xi}_{\text{c}}^{0}\to {\Xi}^{-}{\text{e}}^{+}{\nu }_{\text{e}}$$ decay channels in the range 2 < p _T < 12 GeV /c . The baryon-to-meson $$\left({\Xi}_{\text{c}}^{0,+}/{\text{D}}^{0}\right)$$ and the baryon-to-baryon $$\left({\Xi}_{\text{c}}^{0,+}/{\Lambda}_{\text{c}}^{+}\right)$$ production yield ratios show no significant dependence on multiplicity. In addition, the observed yield ratios are not described by theoretical predictions that model charm-quark fragmentation based on measurements at e ⁺ e ⁻ and e ⁻ p colliders, indicating differences in the charm-baryon production mechanism in pp collisions. A comparison with different event generators and tunings, including different modelling of the hadronisation process, is also discussed. Moreover, the branching-fraction ratio of $${\text{BR}}\left({\Xi}_{\text{c}}^{0}\to {\Xi }^{-}{\text{e}}^{+}{\nu }_{\text{e}}\right)/{\text{BR}}\left({\Xi}_{\text{c}}^{0}\to {\Xi }^{-}{\pi }^{+}\right)$$ is measured as 0.825 ± 0.094 (stat.) ± 0.081 (syst.). This value supersedes the previous ALICE measurement, improving the statistical precision by a factor of 1.6.

The current research paradigm is one of data-driven research. Researchers are beginning to deploy computer facilities to produce and analyze large amounts of data. As requirements for computing power grow, data processing in traditional workstations is always under pressure for efficient resource management. In such an environment, a tremendous amount of data is being processed using parallel computing for efficient and effective research results. HTCondor, as an example, provides computing power for data analysis for researchers. Although such a system works well in a traditional computing cluster environment, we need an efficient methodology to meet the ever-increasing demands of computing using limited resources. In this paper, we propose an approach to integrating clusters that can share their computing power on the basis of a priority policy. Our approach makes it possible to share worker nodes while maintaining the resources allocated to each group. In addition, we have utilized the historical data of user usage in order to analyze problems that have occurred during job execution due to resource sharing and the actual operating results. Our findings can provide a reasonable guideline for limited computing powers shared by multiple scientific groups.

The transverse momentum spectra and integrated yields of anti- $$\Sigma $$ Σ hyperons ( $$\overline{\Sigma }^{\pm } $$ Σ ¯ ± ) have been measured in $$\text {pp}$$ pp and $$\text {p}{-}\text {Pb}$$ p - Pb collisions at $$\sqrt{s_{\textrm{NN}}}=5.02$$ s NN = 5.02 TeV with the ALICE experiment. Measurements are performed via the newly accessed decay channel $$\overline{\Sigma }^{\pm } \!\!\rightarrow \mathrm{\overline{n}} \pi ^{\pm }$$ Σ ¯ ± → n ¯ π ± . A new method of antineutron reconstruction with the PHOS electromagnetic spectrometer is developed and applied to this analysis. The $$p_{\textrm{T}}$$ p T spectra of $$\overline{\Sigma }^{\pm } $$ Σ ¯ ± are measured in the range $$0.5<p_{\textrm{T}} <3$$ 0.5 < p T < 3 GeV/ $$c$$ c and compared to predictions of the PYTHIA 8, DPMJET, PHOJET, EPOS LHC and EPOS4 models. The EPOS LHC and EPOS4 models provide the best descriptions of the measured spectra both in $$\text {pp}$$ pp and $$\text {p}{-}\text {Pb}$$ p - Pb collisions, while models which do not account for multiparton interactions provide a considerably worse description at high $$p_{\textrm{T}}$$ p T . The total yields of $$\overline{\Sigma }^{\pm } $$ Σ ¯ ± in both $$\text {pp}$$ pp and $$\text {p}{-}\text {Pb}$$ p - Pb collisions are compared to predictions of the Thermal-FIST model and dynamical models PYTHIA 8, DPMJET, PHOJET, EPOS LHC and EPOS4. All models reproduce the total yields in both colliding systems within uncertainties. The nuclear modification factors $$R_\textrm{pPb}$$ R pPb for both $$\overline{\Sigma }^{+} $$ Σ ¯ + and $$\overline{\Sigma }^{-} $$ Σ ¯ - are evaluated and compared to those of protons, $$\Lambda $$ Λ and $$\Xi $$ Ξ hyperons, and predictions of EPOS LHC and EPOS4 models. No deviations of $$R_\textrm{pPb}$$ R pPb for $$\overline{\Sigma }^{\pm } $$ Σ ¯ ± from the model predictions or measurements for other hadrons are found within uncertainties.