Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)最新文献

{"title":"Jet substructure and boosted jet measurements at CMS","authors":"D. Cerci","doi":"10.22323/1.390.0507","DOIUrl":"https://doi.org/10.22323/1.390.0507","url":null,"abstract":"","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78634609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Light hadron spectroscopy at BESIII","authors":"Runqiu Ma","doi":"10.22323/1.390.0484","DOIUrl":"https://doi.org/10.22323/1.390.0484","url":null,"abstract":"","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74810129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Providing the computing and data to the physicists: Overview of the ATLAS distributed computing system","authors":"M. Svatos","doi":"10.22323/1.390.0926","DOIUrl":"https://doi.org/10.22323/1.390.0926","url":null,"abstract":"The ATLAS experiment at CERN uses more than 150 sites in the WLCG to process and analyze data recorded by the LHC. The grid workflow system PanDA routinely utilizes more than 400 thousand CPU cores of those sites. The data management system Rucio manages about half an exabyte of detector and simulation data distributed among these sites. With the ever-improving performance of the LHC, more data is expected to come and the ATLAS computing needs to evolve and adapt to that. Disk space will become more scarce which should be alleviated by more active usage of tapes and caches and new smaller data formats. Grid jobs can run not just on the WLCG sites but also on opportunistic resources, i.e. clouds and HPCs. A new grafana-based monitoring system facilitates operation of the ATLAS computing. This presentation will review and explain the improvements put in place for the upcoming Run 3 and will provide an outlook to the many improvements needed for the HL-LHC.","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86501178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Early results from Full Event Interpretation at Belle II","authors":"William Sutcliffe","doi":"10.22323/1.390.0787","DOIUrl":"https://doi.org/10.22323/1.390.0787","url":null,"abstract":"loose selection on the tag-side multivariate classifier, the calibration factors are 0.65± 0.02 and 0.83 ± 0.03 for tag-side + and 0 mesons, respectively. The calibrated hadronic tag-side decay modes are used to measure the branching fractions B( 0 → ∗+l− āl) = (4.45 ± 0.41(stat) ± 0.27(sys) ± 0.45(cs)) × 10−2 and B( 0 → c+l− āl) = (1.62 ± 0.42(stat) ± 0.07(sys)) × 10−4 in 34.6 fb−1 of Belle II data.","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87610787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The ILD Software Tools and Detector Performance","authors":"R. Eté","doi":"10.22323/1.390.0909","DOIUrl":"https://doi.org/10.22323/1.390.0909","url":null,"abstract":"The ILD detector is designed for high precision physics at the ILC. It is optimized for particle flow event reconstruction with extremely precise tracking capabilities and highly granular calorimeters. Over the last decade, the ILD concept group has developed a suite of sophisticated software packages for simulation and reconstruction in the context of the iLCSoft ecosystem in collaboration with other future collider projects. We will present an overview of the ILD software from the detailed and realistic modeling of the detector with DD4hep, over the event reconstruction algorithms with its pattern recognition and particle flow algorithms to the high level reconstruction for flavor tagging and particle identification. Most of the these tools have been developed in a detector-agnostic way and are also applicable to other future collider experiments. Finally we will present an overview of the resulting detector performance as shown in ILD’s Interim Design Report (IDR) [1]. Talk presented at 40th International Conference on High Energy physics ICHEP2020 July 28 August 6, 2020 Prague, Czech Republic (virtual meeting) 1) Speaker, email: remi.ete@desy.de The ILD Software Tools and Detector Performance Remi Etea,⇤, on behalf of the ILD concept group a Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607 Hamburg, Germany E-mail: remi.ete@desy.de The ILD detector is designed for high precision physics at the ILC. It is optimized for particle flow event reconstruction with extremely precise tracking capabilities and highly granular calorimeters. Over the last decade, the ILD concept group has developed a suite of sophisticated software packages for simulation and reconstruction in the context of the iLCSoft ecosystem in collaboration with other future collider projects. We will present an overview of the ILD software from the detailed and realistic modeling of the detector with DD4hep, over the event reconstruction algorithms with its pattern recognition and particle flow algorithms to the high level reconstruction for flavor tagging and particle identification. Most of the these tools have been developed in a detector-agnostic way and are also applicable to other future collider experiments. Finally we will present an overview of the resulting detector performance as shown in ILD’s Interim Design Report (IDR) [1]. 40th International Conference on High Energy physics ICHEP2020 July 28 August 6, 2020 Prague, Czech Republic (virtual meeting)","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89771940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dedicated data analyses for improving PDFs: Study of proton parton distribution functions at high x and charm production in charged DIS at HERA","authors":"R. Aggarwal","doi":"10.22323/1.390.0448","DOIUrl":"https://doi.org/10.22323/1.390.0448","url":null,"abstract":"Proton parton distribution functions (PDFs) are poorly constrained by existing data for Bjorken x larger than 0.6, and the PDFs extracted from global fits differ considerably from each other. A technique for comparing predictions based on different PDF sets to observed event numbers is presented. It is applied to compare predictions from the most commonly used PDFs to published ZEUS data at high Bjorken x. A wide variation is found in the ability of the PDFs to predict the observed results. A scheme for including the ZEUS high-x data in future PDF extractions is discussed. Charm production in charged current deep inelastic scattering has been measured for the first time in e±p collisions, using data collected with the ZEUS detector at HERA, corresponding to an integrated luminosity of 358 pb−1 separately for e+p and e−p scattering at a centre-of-mass energy of √ (s) =318GeV within a kinematic phase-space region of 200 GeV2< Q2 <60000 GeV2 and y <0.9, where Q2 is the squared four-momentum transfer and y is the inelasticity. The measured cross sections of electroweak charm production are consistent with expectations from the Standard Model within the large statistical uncertainties.","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84205412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Event plane determination with the new ALICE FIT detector","authors":"H. Rytkonen","doi":"10.22323/1.390.0814","DOIUrl":"https://doi.org/10.22323/1.390.0814","url":null,"abstract":"Duringthe on-goingsecond longshutdownof LHC,the forwarddetectorsof theALICEexperiment are implementing an extensive upgrade. In particular, a new Fast Interaction Trigger (FIT) has been designed and built. It consists of three sub-detector systems delivering a broad range of online functionalities, and an essential input for event characterization and physics analysis. For instance, FIT will deliver the precise collision time for the TOF-based particle identification, provide the centrality and the event plane information, and measure the cross section of diffractive processes. This note will discuss usage of FIT in the event plane determination during Run 3. A simulated event plane resolution at √ s NN = 2 . 76 TeV is also presented.","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90812328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Searches for flavour violation and flavour changing neutral currents in top quark final states","authors":"N. M. Köhler","doi":"10.22323/1.390.0330","DOIUrl":"https://doi.org/10.22323/1.390.0330","url":null,"abstract":"The remarkably large integrated luminosity collected by the ATLAS detector at the highest protonproton collision energy provided by the Large Hadron Collider (LHC) allows to probe the presence of new physics thatmight breakwell established symmetries or enhance extremely rare processes in the StandardModel (SM) of particle physics. Two such significant examples are lepton universality and Flavour Changing Neutral Currents (FCNC). Recent measurements involving B-meson decays sparked renewed interest in testing lepton universality between tau and light leptons because of observed deviations at the four-standard-deviation level. By selecting events with two opposite sign leptons (muon pairs and electron-muon pairs) and at least two b-tagged jets, a highly pure sample of top-quark pair decays is assembled and used to extract a large unbiased sample of W bosons decaying to leptons down to low transverse momenta. A fit to the two dimensional distribution of the transverse momentum and the transverse impact parameter of the lepton is then used to differentiate between leptons originating directly from the W boson and those resulting from the W-boson-to-tau-lepton decay chain. This results in a precise measurement of the ratio between the probability for the W boson decay to tau to the probability for its decay to muon. On the other hand, SM FCNC involving the top-quark decay to another up-type quark and a neutral boson are so small that any measurable branching ratio for such a decay is an indication of new physics. Two searches for FCNC couplings are presented. First, the search for the FCNC coupling between the top quark and the Higgs boson uses events with one electron or muon, missing energy and three or four jets to search for both the production of a single top-quark in association with a Higgs boson or the production of a top-quark pair with one top quark decaying to a Higgs boson and an up or a charm quark. The results are interpreted also in terms of effective field theory couplings describing the tqH vertex. Finally, 81 fb−1 of integrated luminosity are used to search for FCNC via the coupling of a top quark, a photon and an up or charm quark in events with one photon, one lepton (electron or muon), one b-tagged jet and missing transverse momentum.","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75159940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Top quark pair and single top differential cross sections in CMS","authors":"G. Bakas","doi":"10.22323/1.390.0317","DOIUrl":"https://doi.org/10.22323/1.390.0317","url":null,"abstract":"","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81632803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and Performance of the Belle II High Level Trigger","authors":"M. Prim, N. Braun, Y. Guan, O. Hartbrich, R. Itoh, T. Konno, K. Lautenbach, C. Li, Z. Liu, M. Nakao, S. Park, S. Reiter, B. Spruck, S. Suzuki, S. Yamada, Jing-zhou Zhao, Qi-Dong Zhou","doi":"10.22323/1.390.0769","DOIUrl":"https://doi.org/10.22323/1.390.0769","url":null,"abstract":"M. T. Prim,0,∗ N. Braun, Y. Guan, O. Hartbrich, R. Itoh, T. Konno, 5 K. Lautenbach, C. Li, Z-A. Liu, M. Nakao, SH. Park, 9 S. Reiter, B. Sprück, S. Y. Suzuki, S. Yamada, J. Zhao and Q. Zhou Universität Bonn Physikalisches Institut, Bonn, Germany Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany University of Cincinnati, Cincinnati, U.S.A University of Hawaii, Honolulu, U.S.A High Energy Accelerator Research Organization (KEK), Tsukuba, Japan 5 Kitasato University, Sagamihara, Japan Univeristy of Giessen, Giessen, Germany LiaoNing Normal University (LNNU), Dalian, China Insutitute of High Energy Physics (IHEP), Beijing, China Yonsei University, Seoul, Korea University of Mainz, Mainz, Germany E-mail: markus.prim@belle2.org","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84588402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}