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Neural networks for TeV cosmic electrons identification on the DAMPE experiment DAMPE实验中TeV宇宙电子识别的神经网络
D. Droz, A. Tykhonov, Xin Wu, M. Deliyergiyev
The past decades have witnessed the deployment of a new generation of cosmic ray (CR) observatories with unprecedented sensitivity and complexity, pushing towards ever-higher energies. To face the challenges of the multi-TeV domain, such instruments must be accompanied by equally powerful analysis techniques, able to exploit as much information as available. For example, the machine learning tool set may provide the needed techniques. We present a neural network optimised for the identification of multi-TeV electrons on DAMPE, a calorimetric spaceborne CR observatory with among other objectives the measurement of cosmic electrons up to 10 TeV. This constitutes a particularly challenging endeavour due to both the soft electron spectrum and the large proton background. The developed neural network significantly outperforms the more traditional cut-based approach, achieving a much lower proton contamination in the multi-TeV domain with a high signal efficiency, and retains its accuracy when transposed from Monte Carlo to real data.
过去几十年见证了新一代宇宙射线(CR)观测站的部署,它们具有前所未有的灵敏度和复杂性,朝着更高的能量发展。为了面对多tev领域的挑战,这些仪器必须配备同样强大的分析技术,能够利用尽可能多的信息。例如,机器学习工具集可以提供所需的技术。我们提出了一个优化的神经网络,用于识别DAMPE上的多TeV电子,DAMPE是一个量热星载CR天文台,其目标之一是测量高达10 TeV的宇宙电子。由于软电子谱和大质子背景,这构成了一个特别具有挑战性的努力。开发的神经网络显著优于传统的基于切割的方法,在多tev域中实现了更低的质子污染,具有高信号效率,并且在从蒙特卡罗转换到实际数据时保持其准确性。
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引用次数: 0
Measurement of the Drell-Yan transverse momentum dependence over a wide mass range at 13 TeV from CMS CMS测量Drell-Yan在13tev宽质量范围内的横向动量依赖
Itana Bubanja
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引用次数: 0
Effects of cold aberrations on the longitudinal error signals and its compensation 冷像差对纵向误差信号的影响及其补偿
Priyanka Giri, D. Bersanetti, M. Boldrini, J. Casanueva Diaz, M. Cifaldi, V. Fafone, M. Lorenzini, D. Lumaca, I. Nardecchia, M. Pinto, A. Rocchi, E. N. Tapia San Martín, M. Valentini, M. Mantovani
P. Giri, a,b,∗ D. Bersanetti, M. Boldrini, J. Casanueva Diaz, f M. Cifaldi, V. Fafone, M. Lorenzini, D. Lumaca, I. Nardecchia, M. Pinto, f A. Rocchi, C. Taranto, E. N. Tapia San Martín, M. Valentini, j ,k and M. Mantovani f Università di Pisa, I-56127 Pisa, Italy Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa, Italy Istituto Nazionale di Fisica Nucleare, Sezione di Genova, I-16146 Genova, Italy Università di Roma “La Sapienza”, I-00185 Roma, Italy Istituto Nazionale di Fisica Nucleare, Sezione di Roma, I-00185 Roma, Italy f European Gravitational Observatory (EGO), I-56021 Cascina, Pisa, Italy Università degli Studi di Roma Tor Vergata,I-00133,Rome, Italy Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata, I-00133 Roma, Italy Nikhef, Science Park 105, 1098 XG Amsterdam, Netherlands Università di Trento, Dipartimento di Fisica, I-38123 Povo, Trento, Italy Istituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics and Applications, I-38123 Povo, Trento, Italy E-mail: priyanka.giri@pi.infn.it
P ., a、b、∗转速,J . D . Bersanetti, M .德里尼Casanueva Diaz, f M . Cifaldi见Fafone, M . D .蜗牛,伦平托Nardecchia, M ., f。琼斯,C .塔兰托,E . Tapia圣·马丁M .解读f, J, k和M . Mantovani比萨大学I-56127比萨、意大利国家核物理研究所比萨节、I-56127比萨、热那亚的意大利国家核物理研究所,分庭,I-16146热那亚、意大利罗马大学的“智慧”,罗马I-00185意大利国家核物理研究所,罗马,I-00185罗马、意大利f节欧洲Gravitational天文台(EGO), I-56021农舍、比萨、意大利罗马universita degli Studi di Tor Vergata I-00133、罗马、意大利国家核物理研究所、罗马Tor Vergata节、I-00133罗马,意大利Nikhef,科学公园105、1098 /阿姆斯特丹,荷兰大学物理系,特伦托I-38123 Povo特伦托,意大利国家核物理研究所,特伦托基础物理与应用研究所,I-38123 Povo, Trento,意大利电子邮件:priyanka.giri@pi.infn.it
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引用次数: 0
Measurements of the R value at BESIII BESIII的R值测量
M. Irshad
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引用次数: 0
First inverse moment of the doubly-heavy baryon distribution amplitude from HQET sum rule 从HQET求和规则得到的重重子分布振幅的第一逆矩
A. Shukhtina, Alexander Parkhomenko
Heavy-quark symmetry (HQS), despite being approximate, allows to relate dynamically many hadron systems. In the HQS-limit doubly-heavy baryons, whose dynamics is determined by a light quark situated in a color field of a static pair of heavy quarks, are similar to heavy mesons with a heavy antiquark. Non-local interpolation currents are introduced and corresponding matrix elements between the baryon and vacuum state are expressed in terms of light-cone distribution amplitudes. As well known, the first inverse moment of the leading twist -meson distribution amplitude (DA) is a very important hadronic parameter needed for an accurate theoretical description of -meson exclusive decays. It is quite natural that a similar moment of doubly-heavy baryons is of importance in exclusive doubly-heavy baryons’ decays. We obtain HQET sum rules for the first inverse moment based on the correlation functions containing nonlocal heavy-light operators of doubly-heavy baryons and their local interpolating currents.
重夸克对称(HQS),尽管是近似的,但允许动态地联系许多强子系统。在hqs极限中,双重重子的动力学是由位于静态重夸克对色场中的轻夸克决定的,它类似于带有重反夸克的重介子。引入非局域插值电流,用光锥分布幅值表示重子与真空态之间的矩阵元。众所周知,前导扭曲-介子分布振幅(DA)的第一逆矩是精确描述-介子独占衰变所需的一个非常重要的强子参数。很自然地,类似的重重子时刻在排他性重重子衰变中是重要的。基于包含双重重子非局部重-轻算子及其局部插值流的相关函数,得到了第一逆矩的HQET和规则。
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引用次数: 0
Subleading colour effects and spin correlations in the PanScales showers 泛尺度星雨的次领先色彩效果和自旋相关性
Ludovic Scyboz
In the context of the PanScales parton shower project, I describe two advances in the development of final-state parton showers with controlled logarithmic accuracy. The first (Ref. [1]) involves simple new algorithms to resolve the long-standing issue of incorrect subleading-colour contributions at leading logarithmic (LL) accuracy in dipoleand antenna-type final-state showers, and also enables the PanScales showers to obtain full-colour NLL accuracy for many observables. The second (Ref. [2]) concerns spin correlations, where we propose a spinor-product based implementation of the well-established Collins algorithm. We verify the logarithmic accuracy of the results with separate purely collinear calculations, using novel spin-sensitive jet observables that are of potential interest also for future experimental measurements.
在PanScales部分淋浴项目的背景下,我描述了具有控制对数精度的最终状态部分淋浴开发的两个进展。第一个(参考文献b[1])涉及简单的新算法,以解决长期存在的问题,即在偶极子和天线型最终状态阵雨中,在领先对数(LL)精度上的次领先色贡献不正确,并且还使PanScales阵雨能够获得许多可观测物的全彩NLL精度。第二个(参考文献b[2])涉及自旋相关性,其中我们提出了基于已建立的柯林斯算法的自旋积实现。我们用单独的纯共线计算验证了结果的对数精度,使用新的自旋敏感射流观测,这对未来的实验测量也有潜在的兴趣。
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引用次数: 0
Magnetic-field influence on beta-processes in core-collapse supernova 磁场对核心坍缩超新星β过程的影响
A. Dobrynina, I. Ognev
Neutrinos play a significant and sometimes even dominant role in all phases of the supernova explosion. The most important neutrino processes in a core-collapse supernova are beta-processes, which are responsible for the energy exchange between neutrinos and the matter and change a chemical composition of a medium. We investigate an influence of a magnetic field on betaprocesses under conditions of a supernova matter. For any magnetic field strength discussed in applications to astrophysical objects we obtain simple analytical expressions for reaction rates of beta-processes. In our analysis we use results of one-dimensional simulations of a supernova explosion performed with the PROMETHEUS-VERTEX code. We found that, the magnetic field with the strength B ∼ 1015 G suppresses the neutron production on several percents in comparison with the unmagnetized case. The obtained analytical expressions can be also applied for postmerger accretion discs.
中微子在超新星爆炸的所有阶段起着重要的作用,有时甚至起着主导作用。核心坍缩超新星中最重要的中微子过程是β过程,它负责中微子和物质之间的能量交换,并改变介质的化学成分。我们研究了在超新星物质条件下磁场对β过程的影响。对于在天体物理对象应用中讨论的任何磁场强度,我们得到了β过程反应速率的简单解析表达式。在我们的分析中,我们使用PROMETHEUS-VERTEX代码执行的超新星爆炸的一维模拟结果。我们发现,与未磁化的情况相比,强度为B ~ 1015g的磁场抑制了几个百分点的中子产生。所得的解析表达式也适用于合并后吸积盘。
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引用次数: 0
Study of the cosmic muon rate nearby the Advanced Virgo detector at the end of the O3 run 在O3运行结束时,高级室女座探测器附近的宇宙介子速率的研究
F. di Renzo, N. Arnaud, Theodoros Avgitas, R. De Rosa, I. Fiori, C. Giunchi, K. Janssens, S. Katsanevas, A. Longo, J. Marteau, Marco Olivieri, M. Tringali, F. Paoletti, P. Ruggi
Francesco Di Renzo,0,1,∗ Nicolas Arnaud, Theodoros Avgitas, Rosario De Rosa, Irene Fiori, Carlo Giunchi, 5 Kamiel Janssens, Stavros Katsanevas, Alessandro Longo, Jacques Marteau, Marco Olivieri, 9 Federico Paoletti, Paolo Ruggi and Maria Concetta Tringali Università di Pisa, I-56127 Pisa, Italy Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa, Italy Universite Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France European Gravitational Observatory (EGO), I-56021 Cascina, Pisa, Italy Università di Napoli “Federico II”, I-80126 Napoli, Italy 5 Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, I-56125 Pisa, Italy Universiteit Antwerpen, Prinsstraat 13, 2000 Antwerpen, Belgium Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, I-00146 Roma, Italy Institut de Physique Nucléaire de Lyon, Lyon, France 9 Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, I-40128 Bologna, Italy E-mail: francesco.direnzo@df.unipi.it
弗朗切斯科·尼古拉·阿尔诺·伦佐,0.1,∗表示Avgitas罗萨里奥De Rosa,艾琳,花儿,Carlo灯芯草、5信息Janssens、斯塔夫亚历山德罗·Katsanevas Longo Olivieri马克雅克·b、9、费德里科·Paoletti,比萨大学保罗Ruggi and Maria概念Tringali I-56127比萨、意大利国家核物理研究所比萨节、I-56127比萨、意大利Universite Paris-Saclay, CNRS / IN2P3、IJCLab 91405奥赛、法国、欧洲Gravitational天文台(EGO), I-56021,农舍比萨、意大利那不勒斯大学“Federico II”5、I-80126那不勒斯,意大利国家地球物理和火山学研究所,比萨科、I-56125比萨、意大利大学Antwerpen特13研究所,2000年比利时安特卫普、核物理、节罗马三个、I-00146罗马,意大利Institut de体质Nucléaire de里昂,里昂、法国国家地球物理和火山学研究所9、意大利博洛尼亚节,I-40128博洛尼亚,电子邮件:弗朗切斯科·direnzo@df unipi。
{"title":"Study of the cosmic muon rate nearby the Advanced Virgo detector at the end of the O3 run","authors":"F. di Renzo, N. Arnaud, Theodoros Avgitas, R. De Rosa, I. Fiori, C. Giunchi, K. Janssens, S. Katsanevas, A. Longo, J. Marteau, Marco Olivieri, M. Tringali, F. Paoletti, P. Ruggi","doi":"10.22323/1.398.0059","DOIUrl":"https://doi.org/10.22323/1.398.0059","url":null,"abstract":"Francesco Di Renzo,0,1,∗ Nicolas Arnaud, Theodoros Avgitas, Rosario De Rosa, Irene Fiori, Carlo Giunchi, 5 Kamiel Janssens, Stavros Katsanevas, Alessandro Longo, Jacques Marteau, Marco Olivieri, 9 Federico Paoletti, Paolo Ruggi and Maria Concetta Tringali Università di Pisa, I-56127 Pisa, Italy Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa, Italy Universite Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France European Gravitational Observatory (EGO), I-56021 Cascina, Pisa, Italy Università di Napoli “Federico II”, I-80126 Napoli, Italy 5 Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, I-56125 Pisa, Italy Universiteit Antwerpen, Prinsstraat 13, 2000 Antwerpen, Belgium Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, I-00146 Roma, Italy Institut de Physique Nucléaire de Lyon, Lyon, France 9 Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, I-40128 Bologna, Italy E-mail: francesco.direnzo@df.unipi.it","PeriodicalId":218352,"journal":{"name":"Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115740100","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
Construction and verification of analytical approximation of nonequilibrium neutrino distribution function in core-collapse supernova 核心坍缩超新星非平衡态中微子分布函数解析近似的构造与验证
E. Koptyaeva, A. Dobrynina, I. Ognev
The local nonequilibrium neutrino distribution function in a core-collapse supernova is considered and two variants of its analytical approximation are suggested. The proposed analytical approximations are verified using the results of a one-dimensional simulation of neutrino propagation, performed self-consistently with hydrodynamics in Prometheus-Vertex code. It was shown that the approximation, based on a Fermi-like distribution of neutrino spectrum, agrees with results of Prometheus-Vertex simulation only in the inner parts of the supernova. Whereas the approximation based on alpha-fit of neutrino energy distribution, also known as Gamma-distribution, is more general and has no restrictions for application in any part of the supernova. The obtained results could be applied for estimation of various neutrino effects in supernova conditions without their direct inclusion in the explosion simulation.
研究了核坍缩超新星的局部非平衡态中微子分布函数,提出了其解析近似的两种形式。所提出的解析近似用中微子传播的一维模拟结果进行了验证,在普罗米修斯-顶点代码中与流体力学自一致。结果表明,基于类费米中微子谱分布的近似只在超新星内部与普罗米修斯-顶点模拟的结果一致。而基于中微子能量分布的α -拟合的近似,也称为伽马分布,是更普遍的,在超新星的任何部分的应用没有限制。所得结果可用于估计超新星条件下的各种中微子效应,而无需将其直接包含在爆炸模拟中。
{"title":"Construction and verification of analytical approximation of nonequilibrium neutrino distribution function in core-collapse supernova","authors":"E. Koptyaeva, A. Dobrynina, I. Ognev","doi":"10.22323/1.398.0052","DOIUrl":"https://doi.org/10.22323/1.398.0052","url":null,"abstract":"The local nonequilibrium neutrino distribution function in a core-collapse supernova is considered and two variants of its analytical approximation are suggested. The proposed analytical approximations are verified using the results of a one-dimensional simulation of neutrino propagation, performed self-consistently with hydrodynamics in Prometheus-Vertex code. It was shown that the approximation, based on a Fermi-like distribution of neutrino spectrum, agrees with results of Prometheus-Vertex simulation only in the inner parts of the supernova. Whereas the approximation based on alpha-fit of neutrino energy distribution, also known as Gamma-distribution, is more general and has no restrictions for application in any part of the supernova. The obtained results could be applied for estimation of various neutrino effects in supernova conditions without their direct inclusion in the explosion simulation.","PeriodicalId":218352,"journal":{"name":"Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114816739","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 contact interactions with inclusive jet production at the LHC at 13 TeV with CMS 用CMS在13tev的大型强子对撞机上寻找包含射流产生的接触相互作用
Toni Maekelae, K. Lipka
{"title":"Search for contact interactions with inclusive jet production at the LHC at 13 TeV with CMS","authors":"Toni Maekelae, K. Lipka","doi":"10.22323/1.398.0337","DOIUrl":"https://doi.org/10.22323/1.398.0337","url":null,"abstract":"","PeriodicalId":218352,"journal":{"name":"Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128125983","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
期刊
Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)
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