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Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019)最新文献

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Hierarchy independent sensitivity to leptonic $delta_{CP}$ with low energy atmospheric neutrinos 低能大气中微子对轻子$delta_{CP}$的层次无关灵敏度
Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019) Pub Date : 2020-06-11 DOI: 10.22323/1.369.0137
D. Indumathi, Lakshmi S Mohan, M. Murthy
{"title":"Hierarchy independent sensitivity to leptonic $delta_{CP}$ with low energy atmospheric neutrinos","authors":"D. Indumathi, Lakshmi S Mohan, M. Murthy","doi":"10.22323/1.369.0137","DOIUrl":"https://doi.org/10.22323/1.369.0137","url":null,"abstract":"One of the important unknowns in neutrino oscillation physics is the leptonic CP phase $delta_{CP}$. Because of the ambiguity between $delta_{CP}$ and neutrino mass hierarchy, experiments have to be designed in such a way as to measure these parameters independent of each other. Long baseline experiments like DUNE is exclusively designed to measure $delta_{CP}$ in regions without hierarchy ambiguity and atmospheric neutrino experiments like INO are designed to measure hierarchy without $delta_{CP}$ ambiguity. However atmospheric neutrinos are not usually used to probe $delta_{CP}$. Here we present that, sub--GeV energy atmospheric neutrinos can be used to probe $delta_{CP}$ irrespective of mass hierarchy. We show that when the events are binned as a function of $(E^{rm{obs}}_l,costheta^{rm{obs}}_l)$, the observed energy and direction of the final state leptons in charged current interactions of $nu$ and $overline{nu}$, a consistent distinction between various $delta_{CP}$ values is obtained. Since there is no sensitivity to the mass ordering/hierarchy, $delta_{CP}$ can be measured without hierarchy ambiguity at these energies. Sensitivity studies with ideal as well as realistic cases are discussed.","PeriodicalId":322602,"journal":{"name":"Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129145909","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
Sterile Neutrinos in Astrophysical Environments : Big Bang Nucleosynthesis and Supernova Neutrino Process 天体物理环境中的无菌中微子:大爆炸核合成和超新星中微子过程
Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019) Pub Date : 2020-06-11 DOI: 10.22323/1.369.0109
Dukjae Jang, Heamin Ko, M. Kusakabe, M. Cheoun
{"title":"Sterile Neutrinos in Astrophysical Environments : Big Bang Nucleosynthesis and Supernova Neutrino Process","authors":"Dukjae Jang, Heamin Ko, M. Kusakabe, M. Cheoun","doi":"10.22323/1.369.0109","DOIUrl":"https://doi.org/10.22323/1.369.0109","url":null,"abstract":"In spite of a great success in the discovery of neutrino oscillations, an inconsistency between the three neutrino model and observed neutrino data has left a problem called \"neutrino anomalies\". The sterile neutrino, as a hypothetical particle, is coined to resolve the anomalies. Although the obscurity of nuclear reactions in reactors should be explained, the sterile neutrino, as a possible solution, has attracted intensive discussions. Especially the role of sterile neutrinos has been importantly discussed in the astrophysics as well as the neutrino physics. In this proceeding, we review how the sterile neutrino affects two astrophysical environments; one is big bang nucleosynthesis (BBN) and the other is supernova (SN) neutrino process.","PeriodicalId":322602,"journal":{"name":"Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129297859","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
Neutrino oscillation results of the OPERA experiment in the CNGS beam CNGS束流中OPERA实验的中微子振荡结果
Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019) Pub Date : 2020-06-11 DOI: 10.22323/1.369.0140
B. Kliček, M. Tenti
{"title":"Neutrino oscillation results of the OPERA experiment in the CNGS beam","authors":"B. Kliček, M. Tenti","doi":"10.22323/1.369.0140","DOIUrl":"https://doi.org/10.22323/1.369.0140","url":null,"abstract":"The OPERA experiment was designed to observe the appearance of tau neutrinos in the muon neutrino CNGS beam. This goal was successfully reached by observing a high purity sample of ν τ charged current (CC) interaction candidate events. Additionally, it was possible to isolate samples of ν e and ν µ CC candidates, as well as neutral current candidate events. These four samples were used to put additional constraints on parameters of both the standard neutrino mixing model and the 3 + 1 sterile model. This poster will review the methodology of measuring neutrino in-teractions using the OPERA apparatus and give an overview of all results on neutrino oscillations produced by the experiment. In particular, a joint analysis of ν τ and ν e samples will be shown which excludes a significant fraction of the sterile neutrino phase space allowed by MiniBooNE appearance analysis.","PeriodicalId":322602,"journal":{"name":"Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127920628","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
Details of T2K Oscillation Analysis T2K振荡分析的细节
Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019) Pub Date : 2020-06-11 DOI: 10.22323/1.369.0037
C. Bronner
{"title":"Details of T2K Oscillation Analysis","authors":"C. Bronner","doi":"10.22323/1.369.0037","DOIUrl":"https://doi.org/10.22323/1.369.0037","url":null,"abstract":"Neutrino oscillations are studied in T2K by comparing the observed data at the far detector to the predictions for different hypotheses to make statistical inferences. The predictions are made using a model of the experiment, constructed from a set of models and simulations tuned to data to predict the neutrino flux reaching the detectors, and describe neutrino interactions as well as the detectors response. Using data corresponding to an exposure of 1.49$times 10^{21}$ proton on targets (POT) in neutrino mode, and 1.63 $times 10^{21}$ POT in anti-neutrino mode, T2K excluded conservation of CP symmetry in neutrino oscillation at the 2$sigma$ level. An excess of observed events compared to the predictions in one of the samples has a strong contribution to this result, and it was found that the p-value to observe such an excess in 1 of the 5 analysis samples was between 5.8% and 11.3% depending on the values of the oscillation parameters assumed.","PeriodicalId":322602,"journal":{"name":"Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126805465","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
Development of very slow negative muon beam 极慢负介子束的发展
Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019) Pub Date : 2020-06-11 DOI: 10.22323/1.369.0090
H. Natori
{"title":"Development of very slow negative muon beam","authors":"H. Natori","doi":"10.22323/1.369.0090","DOIUrl":"https://doi.org/10.22323/1.369.0090","url":null,"abstract":"","PeriodicalId":322602,"journal":{"name":"Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019)","volume":"1993 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130964614","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
Radiation study of the target station for the EMuS baseline scheme 动车组基线方案目标站辐射研究
Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019) Pub Date : 2020-06-11 DOI: 10.22323/1.369.0146
Guang Zhao
{"title":"Radiation study of the target station for the EMuS baseline scheme","authors":"Guang Zhao","doi":"10.22323/1.369.0146","DOIUrl":"https://doi.org/10.22323/1.369.0146","url":null,"abstract":"In this presentation, a radiation study of the target station for the EMuS baseline scheme is reported. A detailed study for the 5-kW proton beam is firstly reported and a preliminary study for the 25-kW proton beam is also presented.","PeriodicalId":322602,"journal":{"name":"Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128381084","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 charged lepton flavor violation in J-PARC: COMET experiment 在J-PARC: COMET实验中寻找带电轻子风味违逆
Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019) Pub Date : 2020-06-11 DOI: 10.22323/1.369.0083
T. Xing
{"title":"Search for charged lepton flavor violation in J-PARC: COMET experiment","authors":"T. Xing","doi":"10.22323/1.369.0083","DOIUrl":"https://doi.org/10.22323/1.369.0083","url":null,"abstract":"COMET (COherent Muon to Electron Transition) is an experiment located in Japan, searching for flavour violation in the charged lepton sector, using high-intensity pulsed proton beam in J-PARC. COMET aims to search for the coherent neutrinoless process mu- + N -> e- + N. The single event sensitivity of the COMET experiment is about 10^-17, which is 10^4 better than the current limit. This article includes physics motivation of COMET, a detailed description of the design and staged approach of the COMET experiment and an overview of the current status.","PeriodicalId":322602,"journal":{"name":"Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121189033","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
Experimental Muon Source (EMuS) Target Station Shielding Design for "Baby Scheme" “婴儿方案”实验μ介子源(EMuS)靶站屏蔽设计
Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019) Pub Date : 2020-06-11 DOI: 10.22323/1.369.0136
N. Yadav, Yuancai Ye, G. Zhao, N. Vassilopoulos
{"title":"Experimental Muon Source (EMuS) Target Station Shielding Design for \"Baby Scheme\"","authors":"N. Yadav, Yuancai Ye, G. Zhao, N. Vassilopoulos","doi":"10.22323/1.369.0136","DOIUrl":"https://doi.org/10.22323/1.369.0136","url":null,"abstract":"The Experimental Muon Source (EMuS) project at China Spallation Neutron Source (CSNS) in Dongguan aims at building a competitive muon source providing both a low energy surface muon beam and a high energy decay muon beam for muon science. Highly polarized positive surface muons are used in muon spin rotation (μSR) spectrometers in order to study material properties in condensed matter physics, chemistry and biology. Especially in studying magnetic systems; higher momentum muons can be employed in non-invasive analysis of materials, such as bulk-sensitive elemental analysis with negative muons, or muon radiography techniques. EMuS uses up to 25 kW proton beam hitting on a graphite target to produce the muon beam with a conventional magnet side collection target station and an advanced forward superconducting solenoid capture target station, so called as “Baby scheme\" and “Baseline scheme\" respectively. Extremely high radiation produced from the target has to be shielded in order to safeguard the magnet system and the surrounding environment for proper functioning and operation. Therefore, a proper shielding of magnet and environment becomes a key factor of its successful design. We present here the preliminary design and application of hybrid nature of shielding for the EMuS experiment for “Baby scheme\".","PeriodicalId":322602,"journal":{"name":"Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121058996","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
Development of next generation muon beams at the Paul Scherrer Institute 保罗·谢勒研究所下一代介子束的发展
Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019) Pub Date : 2020-06-11 DOI: 10.22323/1.369.0125
R. Iwai, A. Antognini, N. Ayres, Y. Bao, I. Belošević, V. Bondar, A. Eggenberger, M. Hildebrandt, D. Kaplan, P. Kettle, K. Kirch, A. Knecht, J. Nuber, A. Papa, C. Petitjean, T. Phillips, F. Piegsa, S. Ritt, A. Stoykov, D. Taqqu, G. Wichmann
{"title":"Development of next generation muon beams at the Paul Scherrer Institute","authors":"R. Iwai, A. Antognini, N. Ayres, Y. Bao, I. Belošević, V. Bondar, A. Eggenberger, M. Hildebrandt, D. Kaplan, P. Kettle, K. Kirch, A. Knecht, J. Nuber, A. Papa, C. Petitjean, T. Phillips, F. Piegsa, S. Ritt, A. Stoykov, D. Taqqu, G. Wichmann","doi":"10.22323/1.369.0125","DOIUrl":"https://doi.org/10.22323/1.369.0125","url":null,"abstract":"The Paul Scherrer Institute (PSI) provides the world’s highest intensity muon beam of O ( 10 8 ) µ + / s at 28MeV/c. The HiMB project aims to improve this rate by two orders of magnitude. Meanwhile, the muCool collaboration is developing a device which converts a standard surface µ + beam of cm-size and MeV-energy into a beam of 1mm-size and 1eV energy spread by achieving a compression of 6-dimensional phase space by 10 orders of magnitude with a prospected efficiency of 10 − 3 . The","PeriodicalId":322602,"journal":{"name":"Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134517006","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: 7
Status and Future Prospect of Muon Target at J-PARC MLF J-PARC MLF中介子靶的现状与展望
Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019) Pub Date : 2020-06-11 DOI: 10.22323/1.369.0124
S. Makimura, S. Matoba, N. Kawamura
{"title":"Status and Future Prospect of Muon Target at J-PARC MLF","authors":"S. Makimura, S. Matoba, N. Kawamura","doi":"10.22323/1.369.0124","DOIUrl":"https://doi.org/10.22323/1.369.0124","url":null,"abstract":"A pulsed muon beam with unprecedented intensity will be generated by a 3 GeV 333 microA proton beam on a muon target made of 20 mm thick isotropic graphite at J-PARC MLF MUSE (Muon Science Establishment). The first muon beam was successfully produced on September 26th, 2008. To extend the lifetime of the muon target, muon rotating target, in which the radiation damage is distributed to a wider area, was installed in September of 2014. The rotating target has been successfully used for five years without replacement. Meanwhile, the failure on the rotation system that leads the possibility of the loss of the transmission was found during the long-shutdown in September of 2018. The rotating target had been operated with the careful monitoring and the measures in preparation for the loss of the transmission from September 2018 to July 2019. In this report, the trouble of the rotation system and the measures at J-PARC MLF MUSE will be introduced.","PeriodicalId":322602,"journal":{"name":"Proceedings of The 21st international workshop on neutrinos from accelerators — PoS(NuFact2019)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132453293","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
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