Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)最新文献_第10页

Charm cross section and fragmentation fractions in pp collisions with ALICE (12'+3') pp与ALICE(12'+3')碰撞的魅力截面和碎片分数

Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021) Pub Date : 2022-03-07 DOI: 10.22323/1.398.0380

L. Dello Stritto

{"title":"Charm cross section and fragmentation fractions in pp collisions with ALICE (12'+3')","authors":"L. Dello Stritto","doi":"10.22323/1.398.0380","DOIUrl":"https://doi.org/10.22323/1.398.0380","url":null,"abstract":"In this contribution, the latest Λ + c , Ξ 0c and the first Ξ + c , Σ 0 , ++ c and Ω 0c baryon measurements performed with the ALICE detector at midrapidity in proton–proton collisions at √ 𝑠 = 5 . 02 TeV and 13 TeV at the LHC are presented. Recent measurements of baryon-to-meson cross-section ratios at midrapidity show significantly higher results than in e + e − and ep collisions, suggesting that the fragmentation of charm is not universal across different collision systems. Thus, measurements of charm-baryon production are crucial to study the charm-quark hadronisation in pp collisions and the possible difference with respect to e + e − and ep collisions. In addition, the baryon-production measurements were essential for the measurement of the c¯c production cross section performed by ALICE at midrapidity in pp collisions and also presented in this contribution. Furthermore, the new preliminary measurement of the Λ + c /D 0 ratio in 0 ≤ 𝑝 T < 1 GeV / 𝑐 in p–Pb collisions will be discussed. The measurement of charm baryons in proton–nucleus collisions provides important information about Cold Nuclear Matter (CNM) effects. It also helps to understand how the possible presence of collective effects could modify the production of heavy-flavour hadrons and to interpret the similarities observed among pp, proton–nucleus and nucleus–nucleus systems.","PeriodicalId":218352,"journal":{"name":"Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127646465","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

Unitarity Triangle global fits testing the Standard Model: UTfit 2021 SM update 统一三角整体拟合测试标准模型:UTfit 2021 SM更新

Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021) Pub Date : 2022-03-04 DOI: 10.22323/1.398.0512

M. Bona, M. Ciuchini, D. Derkach, F. Ferrari, E. Franco, V. Lubicz, G. Martinelli, M. Pierini, L. Silvestrini, C. Tarantino, V. Vagnoni, M. Valli, L. Vittorio

引用次数: 3

Leptonic and semileptonic D decays at BESIII 轻子和半轻子D在BESIII处衰变

Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021) Pub Date : 2022-03-04 DOI: 10.22323/1.398.0543

Li-Yu Daisy Liu

引用次数: 0

Unitarity Triangle global fits beyond the Standard Model: UTfit 2021 NP update 超越标准模型的统一三角形全局拟合:UTfit 2021 NP更新

Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021) Pub Date : 2022-03-04 DOI: 10.22323/1.398.0500

M. Bona, M. Ciuchini, D. Derkach, F. Ferrari, E. Franco, V. Lubicz, G. Martinelli, M. Pierini, L. Silvestrini, C. Tarantino, V. Vagnoni, M. Valli, L. Vittorio

引用次数: 11

Pattern of New Physics in the angular analysis of $B_s ,to, D_s^{*},(to,D_s,pi,, D_s,gamma), tau,nu$ decays $B_s ,to, D_s^{*},(to,D_s,pi,, D_s,gamma), tau,nu$衰变角分析中的新物理模式

Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021) Pub Date : 2022-03-04 DOI: 10.22323/1.398.0498

N. Das, Rupak Dutta

引用次数: 0

Measurements of net-charge fluctuations across various colliding systems with ALICE 用ALICE测量不同碰撞系统的净电荷波动

Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021) Pub Date : 2022-03-02 DOI: 10.22323/1.398.0319

Shaista Khan

{"title":"Measurements of net-charge fluctuations across various colliding systems with ALICE","authors":"Shaista Khan","doi":"10.22323/1.398.0319","DOIUrl":"https://doi.org/10.22323/1.398.0319","url":null,"abstract":"Event-by-event fluctuations of conserved quantities such as electric charge, baryon number, and strangeness in ultrarelativistic heavy-ion collisions provide insight into the properties of the quark– gluon plasma and the QCD phase diagram. The net-charge fluctuations in finite phase space are usually studied using the νdyn[+,−] observable, which is robust against the detection efficiency losses. This observable becomes equivalent to the strongly intensive quantity Σ with the proper scaling. In this analysis, the values of νdyn[+,−] are obtained with ALICE detector in various colliding systems, namely, pp at √ s=5.02 TeV, p–Pb at sNN=5.02 TeV, and Pb–Pb at √ sNN=2.76 and 5.02 TeV, and Xe–Xe at sNN=5.44 TeV. The observed dependence of νdyn[+,−] on chargedparticle density shows a regular smooth evolution of net-charge fluctuation from smaller to larger collision systems. Furthermore, the observed negative values of νdyn[+,−] indicate the dominance of correlation between the oppositely charged particle pairs as compared to that arising from the like-sign charge pairs. These findings are compared to predictions from HIJING, EPOS-LHC, and PYTHIA8 models. The effect of the kinematical acceptance has also been investigated by examining the νdyn[+,−] dependence on transverse momentum range as well as the width of the pseudorapidity window. The effect of the hadronic resonance decays is also looked into by comparing the experimental findings with the predictions of HIJING model.","PeriodicalId":218352,"journal":{"name":"Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129720187","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

Strategy for high-precision luminosity measurement with the CMS detector at the HL-LHC HL-LHC中CMS探测器的高精度光度测量策略

Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021) Pub Date : 2022-03-01 DOI: 10.22323/1.398.0821

F. Romeo

引用次数: 0

Constraining challenging regions of the SUSY parameter space with the CMS experiment 用CMS实验约束SUSY参数空间的挑战区域

Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021) Pub Date : 2022-03-01 DOI: 10.22323/1.398.0659

Peter Eduard Meiring

引用次数: 1

The operation and performance of the TOP detector at the Belle II experiment 百丽二号实验中TOP探测器的工作和性能

Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021) Pub Date : 2022-03-01 DOI: 10.22323/1.398.0803

K. Kojima

{"title":"The operation and performance of the TOP detector at the Belle II experiment","authors":"K. Kojima","doi":"10.22323/1.398.0803","DOIUrl":"https://doi.org/10.22323/1.398.0803","url":null,"abstract":"TheSuperKEKB/Belle II experiment, the successor of theKEKB/Belle experiment atKEK, started the physics data taking with the full detector system in March 2019. The Time-of-Propagation (TOP) detector was integrated into the Belle II detector for charged particle identification in the barrel region. The TOP detector mainly consists of quartz radiators, Micro-Channel-Plate (MCP) PMTs, and front-end electronics. It reconstructs a ring image of Cherenkov photons generated by an incident particle. It measures the timing of each detected photon with an accuracy of less than 100 ps for good /c separation. In the operation of the TOP detector, harsh beam-induced background in the high luminosity environment is one of the critical issues to keep the particle identification performance. We developed various tools to monitor MCP-PMT performance and to identify and fix errors arising from front-end electronics during data taking. The TOP detector provides 85% identification efficiency at a 10% c misidentification rate in the data at the early stage of the experiment. In these proceedings, we present the operation status and the performance by the summer of 2021.","PeriodicalId":218352,"journal":{"name":"Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122898535","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

The Key4hep turnkey software stack for future colliders Key4hep交钥匙软件堆栈为未来的碰撞器

Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021) Pub Date : 2022-03-01 DOI: 10.22323/1.398.0844

P. Fernandez Declara, G. Ganis, B. Hegner, C. Helsens, M. Petrić, A. Sailer, Valentin Volkl, F. Gaede, T. Madlener, W. Fang, Weidong Li, T. Lin, Xiaomei Zhang, Jiaheng Zou, X. Huang, Teng Li, Sang Hyun Ko, Joseph Wang

引用次数: 4