{"title":"Impact on |美国V_{} |美元美元从decays: New BaBar results on美元\\知道^ - ^ 0 \\ n到K ^ - pi nu_{\\知道}美元(n = 0, 1, 2, 3)和美元\\知道^ - ^ \\到pi - n pi ^ 0 \\ nu_{\\知道的(n = 3, 4美元)","authors":"A. Filippion","doi":"10.1393/NCC/I2019-19252-1","DOIUrl":null,"url":null,"abstract":"This paper reports preliminary measurements of the branching fractions of τ hadronic decays in channels with one negative kaon or pion and multiple π0’s: τ − → K − nπ0ντ (with n = 0, 1, 2, 3) and τ − → π − nπ0ντ (with n = 3, 4). These measurements are of fundamental importance for the precise determination of the |Vus| Cabibbo-Kobahashi-Maskawa matrix element. Based on a data sample of about 435 million τ pairs produced in e+e − collisions at and near the Υ(4S) peak, collected by the BABAR experiment in about ten years of data taking, the following values have been obtained: B(τ − → K − ντ) = (7.174±0.033stat ±0.213sys)×10 −3, B(τ − → K − π0ντ) = (5.054 ± 0.021stat ± 0.148sys) × 10 −3, B(τ − → K − 2π0ντ) = (6.151 ± 0.117stat ± 0.338sys) × 10 −4, B(τ − → K − 3π0ντ) = (1.246 ± 0.164stat ± 0.238sys) × 10 −4, B(τ − → π − 3π0ντ) = (1.168 ± 0.006stat ± 0.038sys) × 10 −2 and B(τ − → π − 4π0ντ) = (9.020 ± 0.400stat ± 0.652sys) × 10 −4.","PeriodicalId":54452,"journal":{"name":"Rivista Del Nuovo Cimento","volume":"85 1","pages":"252"},"PeriodicalIF":5.9000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Impact on | $V_{us}$| from decays: New BaBar results on $\\\\tau^- \\\\to K^- n \\\\pi^0\\\\nu_{\\\\tau}$(n = 0, 1, 2, 3) and $\\\\tau^- \\\\to \\\\pi^- n \\\\pi^0 \\\\nu_{\\\\tau}$(n = 3, 4)\",\"authors\":\"A. Filippion\",\"doi\":\"10.1393/NCC/I2019-19252-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This paper reports preliminary measurements of the branching fractions of τ hadronic decays in channels with one negative kaon or pion and multiple π0’s: τ − → K − nπ0ντ (with n = 0, 1, 2, 3) and τ − → π − nπ0ντ (with n = 3, 4). These measurements are of fundamental importance for the precise determination of the |Vus| Cabibbo-Kobahashi-Maskawa matrix element. Based on a data sample of about 435 million τ pairs produced in e+e − collisions at and near the Υ(4S) peak, collected by the BABAR experiment in about ten years of data taking, the following values have been obtained: B(τ − → K − ντ) = (7.174±0.033stat ±0.213sys)×10 −3, B(τ − → K − π0ντ) = (5.054 ± 0.021stat ± 0.148sys) × 10 −3, B(τ − → K − 2π0ντ) = (6.151 ± 0.117stat ± 0.338sys) × 10 −4, B(τ − → K − 3π0ντ) = (1.246 ± 0.164stat ± 0.238sys) × 10 −4, B(τ − → π − 3π0ντ) = (1.168 ± 0.006stat ± 0.038sys) × 10 −2 and B(τ − → π − 4π0ντ) = (9.020 ± 0.400stat ± 0.652sys) × 10 −4.\",\"PeriodicalId\":54452,\"journal\":{\"name\":\"Rivista Del Nuovo Cimento\",\"volume\":\"85 1\",\"pages\":\"252\"},\"PeriodicalIF\":5.9000,\"publicationDate\":\"2020-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Rivista Del Nuovo Cimento\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1393/NCC/I2019-19252-1\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Rivista Del Nuovo Cimento","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1393/NCC/I2019-19252-1","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
Impact on | $V_{us}$| from decays: New BaBar results on $\tau^- \to K^- n \pi^0\nu_{\tau}$(n = 0, 1, 2, 3) and $\tau^- \to \pi^- n \pi^0 \nu_{\tau}$(n = 3, 4)
This paper reports preliminary measurements of the branching fractions of τ hadronic decays in channels with one negative kaon or pion and multiple π0’s: τ − → K − nπ0ντ (with n = 0, 1, 2, 3) and τ − → π − nπ0ντ (with n = 3, 4). These measurements are of fundamental importance for the precise determination of the |Vus| Cabibbo-Kobahashi-Maskawa matrix element. Based on a data sample of about 435 million τ pairs produced in e+e − collisions at and near the Υ(4S) peak, collected by the BABAR experiment in about ten years of data taking, the following values have been obtained: B(τ − → K − ντ) = (7.174±0.033stat ±0.213sys)×10 −3, B(τ − → K − π0ντ) = (5.054 ± 0.021stat ± 0.148sys) × 10 −3, B(τ − → K − 2π0ντ) = (6.151 ± 0.117stat ± 0.338sys) × 10 −4, B(τ − → K − 3π0ντ) = (1.246 ± 0.164stat ± 0.238sys) × 10 −4, B(τ − → π − 3π0ντ) = (1.168 ± 0.006stat ± 0.038sys) × 10 −2 and B(τ − → π − 4π0ντ) = (9.020 ± 0.400stat ± 0.652sys) × 10 −4.
期刊介绍:
La Rivista del Nuovo Cimento is an international peer-reviewed journal. It publishes monographs in all fields of physics. These monographies aim at presenting the state of the art of topical subjects of relevant interest for the community. Usually, authors are invited and topics suggested by the Deputy Editors-in-Chief, but also spontaneous submissions are examined.