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

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Measurements of Luminosity in ATLAS with Tile Calorimeter 用瓦式量热计测量ATLAS的光度
Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020) Pub Date : 2021-02-25 DOI: 10.22323/1.390.0801
S. G. Fernandez
{"title":"Measurements of Luminosity in ATLAS with Tile Calorimeter","authors":"S. G. Fernandez","doi":"10.22323/1.390.0801","DOIUrl":"https://doi.org/10.22323/1.390.0801","url":null,"abstract":"Luminosity measurements in the ATLAS experiment are provided primarily by the LUCID detector, but rely on other detectors for determining the systematic uncertainties associated with this measurement. The Tile Calorimeter (TileCal), the central hadronic calorimeter of the ATLAS experiment, and the ATLAS Inner Detector (ID) play an important role due to their luminosity measurements being independent of pileup. Comparison of the LUCID luminosity measurements in different run conditions to those obtained by TileCal and ID, as well as a comparison of TileCal to ID, is used to measure and study the dominant systematic uncertainty associated with the LUCID luminosity measurement. In this document the methods of measuring ATLAS luminosity with the Tile Calorimeter and its transformation to a systematic uncertainty are described.","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":"11 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91503266","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}
引用次数: 0
ATLAS Tile Calorimeter time calibration, monitoring and performance in Run 2 ATLAS瓷砖量热计时间校准，监测和性能运行2
Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020) Pub Date : 2021-02-25 DOI: 10.22323/1.390.0810
M. Mlynarikova, Atlas Tile Calorimeter System
{"title":"ATLAS Tile Calorimeter time calibration, monitoring and performance in Run 2","authors":"M. Mlynarikova, Atlas Tile Calorimeter System","doi":"10.22323/1.390.0810","DOIUrl":"https://doi.org/10.22323/1.390.0810","url":null,"abstract":"The Tile Calorimeter is the central hadronic calorimeter of the ATLAS experiment at the Large Hadron Collider at CERN. This sampling device uses steel plates as absorber and scintillating tiles as activemedium. Its response is calibrated to the electromagnetic energy scale bymeans of several dedicated calibration systems. Accurate time calibration is important for energy reconstruction and non-collision background removal. The principle, procedure, and results of time calibration using collision data are presented. Monitoring of the time calibration with a laser system and collision data are discussed as well. Finally, the time resolution as measured with jets in Run 2 is presented.","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78683030","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}
引用次数: 0
MURMUR: a new low-noise experiment for the search of neutron-hidden neutron transitions in the context of braneworld scenarios 杂音:在膜世界场景下寻找中子隐藏中子跃迁的一种新的低噪声实验
Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020) Pub Date : 2021-02-25 DOI: 10.22323/1.390.0783
C. Stasser, G. Terwagne, J. Lamblin, O. Méplan, G. Pignol, B. Coupé, S. Kalcheva, S. Dyck, M. Sarrazin
{"title":"MURMUR: a new low-noise experiment for the search of neutron-hidden neutron transitions in the context of braneworld scenarios","authors":"C. Stasser, G. Terwagne, J. Lamblin, O. Méplan, G. Pignol, B. Coupé, S. Kalcheva, S. Dyck, M. Sarrazin","doi":"10.22323/1.390.0783","DOIUrl":"https://doi.org/10.22323/1.390.0783","url":null,"abstract":"Coraline Stasser,a,∗ Guy Terwagne, Jacob Lamblin, Olivier Méplan, Guillaume Pignol, Bernard Coupé, Silva Kalcheva, Steven Van Dyck and Michaël Sarrazin Laboratory for Analysis by Nuclear Reactions, Department of Physics, University of Namur, 61 rue de Bruxelles, B-5000 Namur, Belgium LPSC, Université Grenoble-Alpes, CNRS/IN2P3, 53 Avenue des Martyrs, F-38026 Grenoble, France Belgian Nuclear Research Centre (SCK·CEN), Boeretang 200, B-2400 Mol, Belgium Institut UTINAM, CNRS/INSU, UMR 6213, Université de Bourgogne-Franche-Comté, 16 route de Gray, F-25030 Besançon Cedex, France","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91121918","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}
引用次数: 0
Leptonic and semileptonic decays with taus at the Belle II experiment 贝尔2号实验中的轻子和半轻子衰变
Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020) Pub Date : 2021-02-24 DOI: 10.22323/1.390.0402
M. Milesi
{"title":"Leptonic and semileptonic decays with taus at the Belle II experiment","authors":"M. Milesi","doi":"10.22323/1.390.0402","DOIUrl":"https://doi.org/10.22323/1.390.0402","url":null,"abstract":"Lepton flavour universality as predicted by the Standard Model is challenged by various measurements of meson decays involving tau and charged light leptons. The Belle II experiment started recording first collision data in spring 2018 and offers a unique laboratory to study lepton flavour universality in leptonic and semileptonic decays at high precision. Here we report the status of establishing first measurements of (semi) tauonic decays and preliminary results of the → gag channel using the available Belle II data, and discuss the future potential of investigating '( (∗) ) anomalies.","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84246790","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}
引用次数: 0
Quantum fields, strings, and physical mathematics 量子场、弦和物理数学
Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020) Pub Date : 2021-02-24 DOI: 10.22323/1.390.0042
P. Sułkowski
{"title":"Quantum fields, strings, and physical mathematics","authors":"P. Sułkowski","doi":"10.22323/1.390.0042","DOIUrl":"https://doi.org/10.22323/1.390.0042","url":null,"abstract":"I briefly review several important formal theory developments in quantum field theory and string theory that were reported at ICHEP conferences in past decades, and explain how they underlie a new research area referred to as physical or quantum mathematics. To illustrate these ideas in some specific context, I discuss certain aspects of topological string theory and a recently discovered knots-quivers correspondence.","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78096214","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}
引用次数: 0
Uncovering hidden new physics patterns in collider events using Bayesian probabilistic models 利用贝叶斯概率模型揭示对撞机事件中隐藏的新物理模式
Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020) Pub Date : 2021-02-22 DOI: 10.22323/1.390.0238
D. Faroughy
{"title":"Uncovering hidden new physics patterns in collider events using Bayesian probabilistic models","authors":"D. Faroughy","doi":"10.22323/1.390.0238","DOIUrl":"https://doi.org/10.22323/1.390.0238","url":null,"abstract":"Individual events at high-energy colliders like the LHC can be represented by a sequence of measurements, or ‘point patterns’. Starting from this generic data representation, we build a simple Bayesian probabilistic model for event measurements useful for unsupervised event classification in beyond the standard model (BSM) studies. In order to arrive to this model we assume that the event measurements are exchangeable (and apply De Finetti’s representation theorem), the data is discrete, and measurements are generated frommultiple ‘latent’ distributions (called themes). The resulting probabilistic model for collider events is a mixed-membership model known as Latent Dirichlet Allocation (LDA), a model extensively used in natural language processing applications. By training on mixed dijet samples of QCD and BSM, we demonstrate that a two-theme LDA model can learn to distinguish in (unlabelled) jet substructure data the hidden new physics patterns produced by a non-trivial BSM signature from a much larger QCD background.","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82727282","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}
引用次数: 9
Rate capability and stability studies on small-Pad resistive Micromegas 小型焊盘电阻式微气体的速率性能和稳定性研究
Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020) Pub Date : 2021-02-22 DOI: 10.22323/1.390.0825
M. Camerlingo, M. Alviggi, V. Canale, M. Pietra, C. Donato, P. Iengo, M. Iodice, F. Petrucci, G. Sekhniaidze
{"title":"Rate capability and stability studies on small-Pad resistive Micromegas","authors":"M. Camerlingo, M. Alviggi, V. Canale, M. Pietra, C. Donato, P. Iengo, M. Iodice, F. Petrucci, G. Sekhniaidze","doi":"10.22323/1.390.0825","DOIUrl":"https://doi.org/10.22323/1.390.0825","url":null,"abstract":"Micromegas are among the most promising micro pattern gaseous detector (MPGD) technologies for applications in high energy physics (HEP). Micromegas are very versatile. They can be used for precision tracking and trigger, in particle flow sampling calorimetry, as anode planes for RICH detectors or for time projection chambers. Driven mainly by future upgrades of existing experiments at high-luminosity LHC (HL-LHC) and for applications at future accelerators, we started an R&D project to push further this technology for operations under very high particle flow up to rates of tens MHz/cm, three orders of magnitude higher than current applications. The miniaturization of the readout elements and the optimization of the spark protection system, as well as the stability and robustness under operation, are the primary challenges of the project.","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87724286","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}
引用次数: 1
A Novel Two-Dimensional Readout Design for Floating Strip Micromegas Detectors 浮式微细气体探测器的二维读出设计
Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020) Pub Date : 2021-02-22 DOI: 10.22323/1.390.0853
F. Klitzner, O. Biebel, J. Bortfeldt, B. Flierl, M. Herrmann, R. Hertenberger
{"title":"A Novel Two-Dimensional Readout Design for Floating Strip Micromegas Detectors","authors":"F. Klitzner, O. Biebel, J. Bortfeldt, B. Flierl, M. Herrmann, R. Hertenberger","doi":"10.22323/1.390.0853","DOIUrl":"https://doi.org/10.22323/1.390.0853","url":null,"abstract":"Floating strip Micromegas detectors are high-rate capable particle detectors with excellent spatial and time resolution, allowing single particle tracking with fluxes up to at least 7 MHz/cm2. The amplified ionization charge is collected on copper anode strips kept at a slightly floating electrical potential. The charge signal is coupled to two layers of perpendicular readout strips in x and y, insulated by thin Kapton layers. A complete understanding of the signal formation in the detector, particularly on the orthogonal y-strips, is achieved: simulations disentangle the signal coupling due to alternating weighting field lines with respect to the ion velocity vector and the response of charge sensitive front-end electronics. Different two-dimensional anode designs with optimized strip geometry have been developed based on the simulations. We present the performance of the detector for the different designs measured in 20 MeV proton/neutron and 180 GeV pion/muon beams, using APV25 front-end electronics.","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":"184 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80525336","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}
引用次数: 0
Search for scalar top quark pair production in the top corridor region with CMS 用CMS搜索顶走廊区域的标量顶夸克对产生
Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020) Pub Date : 2021-02-22 DOI: 10.22323/1.390.0311
A. T. Fernandez
{"title":"Search for scalar top quark pair production in the top corridor region with CMS","authors":"A. T. Fernandez","doi":"10.22323/1.390.0311","DOIUrl":"https://doi.org/10.22323/1.390.0311","url":null,"abstract":"","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82219071","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}
引用次数: 0
Beyond Standard Model Physics at the LHeC and the FCC-eh 超越LHeC和FCC-eh的标准模型物理
Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020) Pub Date : 2021-02-22 DOI: 10.22323/1.390.0227
G. Azuelos, M. D'Onofrio, O. Fischer, LHeC
{"title":"Beyond Standard Model Physics at the LHeC and the FCC-eh","authors":"G. Azuelos, M. D'Onofrio, O. Fischer, LHeC","doi":"10.22323/1.390.0227","DOIUrl":"https://doi.org/10.22323/1.390.0227","url":null,"abstract":"Thanks to the low background, negligible pileup and generally clean environement at 4? colliders, a rich program of physics beyond the Standard Model (BSM) can be explored with precision measurements, complementing searches at LHC and future ?? colliders. We review some recent studies aimed at evaluating the reach and sensitivity of the next generation 4? colliders, the LHeC and FCC-eh, in probing a few BSMmodels, in particular compressed scenarios of supersymmetry, long-lived particles and dark sector, charged Higgs and leptoquarks.","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":"112 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73367608","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}
引用次数: 2
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