Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies

Multi-messenger searches in astrophysics 天体物理学中的多信使搜索

Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019) Pub Date : 2020-04-26 DOI: 10.22323/1.367.0030

K. Egberts

引用次数: 1

Physics Potential of the Jiangmen Underground Neutrino Observatory 江门地下中微子观测站的物理势

Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019) Pub Date : 2019-12-06 DOI: 10.22323/1.367.0123

G. Andronico, C. Lombardo, M. Buscemi, S. Aiello, R. Bruno, R. Caruso, S. Costa, M. Fargetta, N. Giudice, N. Guardone, A. Insolia, S. Monforte, C. Tuvè, G. Verde

引用次数: 0

ATLAS Muon Trigger performance ATLAS μ子触发器性能

Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019) Pub Date : 2019-11-28 DOI: 10.22323/1.367.0168

Y. Noguchi

引用次数: 0

Precision Timing with the CMS MIP Timing Detector 精确定时与CMS MIP定时检测器

Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019) Pub Date : 2019-11-26 DOI: 10.22323/1.367.0100

P. M. R. Arbol

{"title":"Precision Timing with the CMS MIP Timing Detector","authors":"P. M. R. Arbol","doi":"10.22323/1.367.0100","DOIUrl":"https://doi.org/10.22323/1.367.0100","url":null,"abstract":"The Compact Muon Solenoid detector at the CERN Large Hadron Collider is undergoing an extensive Phase II upgrade program to prepare for the challenging conditions of the High-Luminosity LHC. In particular, a new timing layer with hermetic coverage up to a pseudo-rapidity of |$eta$|$=$3 will measure minimum ionizing particles with a time resolution of 30 ps. This MIP Timing Detector will consist of a central barrel region based on LYSO:Ce crystals read out with SiPMs and two end-caps instrumented with radiation-tolerant Low Gain Avalanche Detectors. The precision time information from the MTD will reduce the effects of the high levels of pile-up expected at the HL-LHC and will bring new and unique capabilities to the CMS detector. The time information assigned to each track will enable the use of 4D reconstruction algorithms and will further discriminate interaction vertices within the same bunch crossing to recover the track purity of vertices in current LHC conditions. For instance, in the analysis of di-Higgs boson production, a timing resolution of 30-40 ps is expected to improve the effective luminosity by about 25% through gains in b-tagging and isolation efficiency. We present motivations for precision timing at the HL-LHC and overview the MTD design, while also highlighting specific physics studies benefiting from the improved timing information.","PeriodicalId":163721,"journal":{"name":"Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125450427","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

Searching for rare FCNC decays at BESIII 在BESIII上寻找罕见的FCNC衰变

Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019) Pub Date : 2019-11-26 DOI: 10.22323/1.367.0189

Dayong Wang

引用次数: 0

Toward Realistic Implementations of Large Imaging Calorimeters 面向大型成像量热计的实际实现

Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019) Pub Date : 2019-11-25 DOI: 10.22323/1.367.0151

K. Kawagoe, L. Emberger

{"title":"Toward Realistic Implementations of Large Imaging Calorimeters","authors":"K. Kawagoe, L. Emberger","doi":"10.22323/1.367.0151","DOIUrl":"https://doi.org/10.22323/1.367.0151","url":null,"abstract":"The next generation of collider detectors will most likely make full use of Particle Flow algorithms, requiring precision tracking and imaging calorimeters. The latter, with granularity 2 to 3 orders of magnitude above existing devices, have been developed during the last 15 years by the CALICE collaboration and are now approaching maturity. The state-of-the-art and the remaining challenges will be presented for all the investigated readouts: silicon diodes and scintillator for a tungsten electromagnetic calorimeter, gaseous with semi-digital readout and scintillator with SiPM readout for a hadronic one. We will describe the commissioning, including beam tests, of large scale technological prototypes of a silicon tungsten electromagnetic calorimeter and hadron calorimeters featuring either a gaseous medium or scintillator with SiPM as an active material. Where applicable, raw performances of calorimeter such as energy resolution and linearity will be presented but also studies exploiting the distinct features of granular calorimeters regarding pattern recognition. Beyond these prototypes, the design of experiments addressing the requirements and potential of imaging calorimetry will be commented on.","PeriodicalId":163721,"journal":{"name":"Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125015610","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

Freeze-in production of dark matter through spin-1 and spin-2 portals 通过自旋1号和自旋2号传送门冻结暗物质的生产

Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019) Pub Date : 2019-11-24 DOI: 10.22323/1.367.0076

Maíra Dutra

{"title":"Freeze-in production of dark matter through spin-1 and spin-2 portals","authors":"Maíra Dutra","doi":"10.22323/1.367.0076","DOIUrl":"https://doi.org/10.22323/1.367.0076","url":null,"abstract":"In this conference, I have talked about two scenarios in which the out-of-equilibrium production of dark matter (DM) particles in the early universe is unavoidable. In the first one cite{bhattacharyya_freezing-dark_2018}, we extend the standard model (SM) of particle physics by an extra $U(1)$ gauge group under which all the SM particles are neutral. We then consider DM candidates interacting only with the new spin-1 gauge boson, a heavy $Z^prime$. We assume the presence of heavy beyond the SM fermions charged under both extra $U(1)$ and SM $SU(3)_c$, allowing for a feeble connection between DM and gluons. In the second scenario cite{bernal_spin-2_2018}, we assume that the interaction between DM and SM particles are only mediated by gravitons and massive spin-2 fields, being therefore suppressed by the Planck and some intermediate scales, respectively. In both models, we show that the SM particles are able to produce the right amount of DM candidates via freeze-in at most in the early stages of the radiation era, for DM mass in the range $10^{-3}-10^{14}$ GeV. We have shown that if heavy mediators were produced on-shell within a period of entropy production in the early universe, as in the post-inflationary reheating, the DM relic density may be enhanced by many orders of magnitude relative to the usual instantaneous reheating approximation.","PeriodicalId":163721,"journal":{"name":"Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123207628","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

New results from the DANSS experiment DANSS实验的新结果

Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019) Pub Date : 2019-11-21 DOI: 10.22323/1.367.0056

Yuriy Shitov

{"title":"New results from the DANSS experiment","authors":"Yuriy Shitov","doi":"10.22323/1.367.0056","DOIUrl":"https://doi.org/10.22323/1.367.0056","url":null,"abstract":"The DANSS is a highly segmented m 3 ¯ ν -spectrometer aimed to search for SBL sterile neutrino oscillations in the reactor sector, as well as to solve applied tasks of monitoring the power and fuel composition of a nuclear reactor [ 1]. The detector measures the ¯ ν -spectrum by the IBD method from an industrial nuclear reactor (3.1 GW th , KNNP, Rusia) at distances 10.7-12.7 m from the core using a mobile platform. The search for sterile neutrino oscillations is carried out through the analysis of the bin-per-bin ratios of the positron energy spectra collected at different distances from the reactor. This relative method is free from systematic errors associated with the calculation of the reactor antineutrino spectra and detector efﬁciency. The new results of the DANSS experiment are presented here based on more than 2.1 million events collected in 2016-2019 (2.4-fold increase over published data [ 1]). With the current full data set we do not have a statistically signiﬁcant sign of the sterile neutrino oscillations excluding further the large and interesting portion of the 3 ν + 1 ν model phase space. The DANSS’s abilities to measure nuclear fuel composition and to monitor reactor power at high precision (with 1.5/0.5% statistical/systematical uncertainties reached in 2 days of exposure) in long-term scale (during 17 months) have been also undoubtedly demonstrated.","PeriodicalId":163721,"journal":{"name":"Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128846667","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: 21

Searches for additional Higgs bosons at CMS 在CMS寻找更多的希格斯玻色子

Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019) Pub Date : 2019-11-19 DOI: 10.22323/1.367.0182

J. Tao

引用次数: 1

Dispersive Two-Loop Calculations: Methodology and Applications 色散双环计算:方法和应用

Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019) Pub Date : 2019-11-19 DOI: 10.22323/1.367.0090

A. Aleksejevs, S. Barkanova

引用次数: 0

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