Nuclear physics. B, Proceedings, supplements最新文献

{"title":"RChL currents in Tauola: implementation and fit parameters","authors":"O. Shekhovtsova ,&nbsp;I.M. Nugent ,&nbsp;T. Przedzinski ,&nbsp;P. Roig ,&nbsp;Z. Was","doi":"10.1016/j.nuclphysbps.2014.09.018","DOIUrl":"10.1016/j.nuclphysbps.2014.09.018","url":null,"abstract":"<div><p>We present the results of a partial upgrade to the Monte Carlo event generator TAUOLA using Resonance Chiral Theory for the two and three meson final states. These modes account for 88% of total hadronic width of the tau meson. The first results of the model parameters have been obtained using Preliminary BaBar data for 3<em>π</em> mode.</p></div>","PeriodicalId":93343,"journal":{"name":"Nuclear physics. B, Proceedings, supplements","volume":"253 ","pages":"Pages 73-76"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.nuclphysbps.2014.09.018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74211709","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}

{"title":"The strong coupling from tau decays without prejudice","authors":"Diogo Boito ,&nbsp;Maarten Golterman ,&nbsp;Matthias Jamin ,&nbsp;Andisheh Mahdavi ,&nbsp;Kim Maltman ,&nbsp;James Osborne ,&nbsp;Santiago Peris","doi":"10.1016/j.nuclphysbps.2014.09.014","DOIUrl":"10.1016/j.nuclphysbps.2014.09.014","url":null,"abstract":"<div><p>We review our recent determination of the strong coupling <span><math><msub><mrow><mi>α</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span> from the OPAL data for non-strange hadronic tau decays. We find that <span><math><msub><mrow><mi>α</mi></mrow><mrow><mi>s</mi></mrow></msub><mo>(</mo><msubsup><mrow><mi>m</mi></mrow><mrow><mi>τ</mi></mrow><mrow><mn>2</mn></mrow></msubsup><mo>)</mo><mo>=</mo><mn>0.325</mn><mo>±</mo><mn>0.018</mn></math></span> using fixed-order perturbation theory, and <span><math><msub><mrow><mi>α</mi></mrow><mrow><mi>s</mi></mrow></msub><mo>(</mo><msubsup><mrow><mi>m</mi></mrow><mrow><mi>τ</mi></mrow><mrow><mn>2</mn></mrow></msubsup><mo>)</mo><mo>=</mo><mn>0.347</mn><mo>±</mo><mn>0.025</mn></math></span> using contour-improved perturbation theory. At present, these values supersede any earlier determinations of the strong coupling from hadronic tau decays, including those from ALEPH data.</p></div>","PeriodicalId":93343,"journal":{"name":"Nuclear physics. B, Proceedings, supplements","volume":"253 ","pages":"Pages 56-59"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.nuclphysbps.2014.09.014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80609061","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}

{"title":"Searches for charged Higgs bosons, supersymmetry, and exotica with tau leptons with the ATLAS and CMS detectors at the LHC","authors":"Ryan Reece,&nbsp;ATLAS and CMS collaborations","doi":"10.1016/j.nuclphysbps.2014.09.042","DOIUrl":"10.1016/j.nuclphysbps.2014.09.042","url":null,"abstract":"<div><p>Results are presented from the ATLAS and CMS searches for charged Higgs bosons, supersymmetry, and exotica with tau leptons in the final state. The analyses discussed use a dataset corresponding to 5 fb⁻¹ of integrated luminosity from <span><math><msqrt><mi>s</mi></msqrt><mo>=</mo><mn>7</mn><mspace></mspace><mtext>TeV</mtext></math></span> proton–proton collisions at the LHC in 2011.</p></div>","PeriodicalId":93343,"journal":{"name":"Nuclear physics. B, Proceedings, supplements","volume":"253 ","pages":"Pages 171-175"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.nuclphysbps.2014.09.042","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"94601472","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}

{"title":"Progress of Belle II – detector and performance","authors":"Kenji Inami","doi":"10.1016/j.nuclphysbps.2014.09.046","DOIUrl":"10.1016/j.nuclphysbps.2014.09.046","url":null,"abstract":"<div><p>The progress on the detector and accelerator in the Belle II experiment is presented. The B factories have successfully accumulated the experimental data at <span><math><mi>ϒ</mi><mo>(</mo><mn>4</mn><mi>S</mi><mo>)</mo></math></span> and achieved the world highest sensitivity on the search for lepton flavor violating tau decays and other new physics searches. The Belle II experiment will obtain 50 times larger data samples compared to the Belle experiment and improve the detector sensitivity. The construction of the detector and accelerator is in progress. The commissioning will start in 2014 and the expected integrated luminosity is 50ab⁻¹ by 2022.</p></div>","PeriodicalId":93343,"journal":{"name":"Nuclear physics. B, Proceedings, supplements","volume":"253 ","pages":"Pages 189-192"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.nuclphysbps.2014.09.046","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"96685340","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}

{"title":"Tau trigger, reconstruction and identification at CMS","authors":"Cesare Calabria ,&nbsp;CMS Collaboration","doi":"10.1016/j.nuclphysbps.2014.09.039","DOIUrl":"10.1016/j.nuclphysbps.2014.09.039","url":null,"abstract":"<div><p>The importance of tau leptons in new physics searches at the LHC led the CMS collaboration to design a specific algorithm, the Hadron Plus Strip (HPS) algorithm, for the reconstruction and identification of taus decaying hadronically (<span><math><msub><mrow><mi>τ</mi></mrow><mrow><mi>had</mi></mrow></msub></math></span>). The HPS algorithm makes use of a particle description of the event to identify hadronic decay modes of <em>τ</em> leptons through the reconstruction of intermediate resonances. It also provides discriminators against potentially large backgrounds from quarks, gluons and light leptons (electrons and muons). Moreover, thanks to the particle event reconstruction avalaible in CMS, a fast online hadronic tau reconstruction can be performed allowing the development of efficient tau trigger selections which allow to perform a broad range of physics analysis. This report describes the <span><math><msub><mrow><mi>τ</mi></mrow><mrow><mi>had</mi></mrow></msub></math></span> reconstruction and identification of the HPS algorithm and its performances, studied in simulated <span><math><mi>Z</mi><mo>→</mo><mi>τ</mi><mi>τ</mi></math></span> events and in samples of proton-proton collision data collected during 2011 and 2012 data-taking at <span><math><msqrt><mi>s</mi></msqrt><mo>=</mo><mn>7</mn><mspace></mspace><mrow><mi>TeV</mi></mrow><mtext> and </mtext><mn>8</mn><mspace></mspace><mrow><mi>TeV</mi></mrow></math></span>, respectively. Finally, the performance of the tau trigger selections is presented.</p></div>","PeriodicalId":93343,"journal":{"name":"Nuclear physics. B, Proceedings, supplements","volume":"253 ","pages":"Pages 159-162"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.nuclphysbps.2014.09.039","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"96853896","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}

{"title":"e+e− results from BABAR and implications for the muon g-2","authors":"Michel Davier","doi":"10.1016/j.nuclphysbps.2014.09.030","DOIUrl":"10.1016/j.nuclphysbps.2014.09.030","url":null,"abstract":"<div><p>The <em>BaBar</em> collaboration has nearly completed a program of precise measurements of the cross sections for the dominant channels of <span><math><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>→</mo><mrow><mi>hadrons</mi></mrow></math></span> from threshold to an energy of 3–5 GeV using the initial-state radiation (ISR) method, <em>i.e</em>. the measurement of the cross sections <span><math><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>→</mo><mi>γ</mi><mspace></mspace><mrow><mi>hadrons</mi></mrow></math></span> with the energetic <em>γ</em> detected at large angle to the beams. These data are used as input to vacuum polarization dispersion integrals, in particular the hadronic contribution to the muon <span><math><mi>g</mi><mo>−</mo><mn>2</mn></math></span> anomaly. In addition to the recently measured <span><math><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span> cross section, giving the dominant contibution, many multihadronic channels have been investigated, with some recent examples presented here. We give preliminary results for the process <span><math><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>→</mo><msup><mrow><mi>K</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>K</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>(</mo><mi>γ</mi><mo>)</mo></math></span> using <span><math><mn>232</mn><msup><mrow><mtext>fb</mtext></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span> of data collected with the <em>BaBar</em> detector at <span><math><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span> center-of-mass energies near 10.6 GeV. The lowest-order contribution to the hadronic vacuum polarization term in the muon magnetic anomaly is obtained for this channel: <span><math><msubsup><mrow><mi>a</mi></mrow><mrow><mi>μ</mi></mrow><mrow><mi>K</mi><mi>K</mi><mo>,</mo><mi>L</mi><mi>O</mi></mrow></msubsup><mo>=</mo><mo>(</mo><mn>22.95</mn><mo>±</mo><msub><mrow><mn>0.14</mn></mrow><mrow><mtext>(stat)</mtext></mrow></msub><mo>±</mo><msub><mrow><mn>0.22</mn></mrow><mrow><mtext>(syst)</mtext></mrow></msub><mo>)</mo><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>10</mn></mrow></msup></math></span>, which is about a factor of three more precise than the previous world average value.</p></div>","PeriodicalId":93343,"journal":{"name":"Nuclear physics. B, Proceedings, supplements","volume":"253 ","pages":"Pages 123-126"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.nuclphysbps.2014.09.030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"105434983","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}

{"title":"TAU2012. The Twelfth International Workshop on Tau-Lepton Physics","authors":"","doi":"10.1016/S0920-5632(14)00232-1","DOIUrl":"https://doi.org/10.1016/S0920-5632(14)00232-1","url":null,"abstract":"","PeriodicalId":93343,"journal":{"name":"Nuclear physics. B, Proceedings, supplements","volume":"253 ","pages":"Page iii"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0920-5632(14)00232-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138341264","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}

{"title":"Developement of Hybrid Photo-detectors for the Hyper-Kamiokande Experiment","authors":"Seiko Hirota ,&nbsp;Yasuhiro Nishimura ,&nbsp;Shoei Nakayama ,&nbsp;Isao Kametani ,&nbsp;Masato Shiozawa ,&nbsp;Yoichiro Suzuki ,&nbsp;Hiroyuki Sekiya ,&nbsp;Masayuki Nakahata ,&nbsp;Yoshinari Hayato ,&nbsp;Yuto Haga ,&nbsp;Makoto Miura ,&nbsp;Atsuko Ichikawa ,&nbsp;Motoyasu Ikeda ,&nbsp;Tsuyoshi Nakaya ,&nbsp;Akihiro Minamino ,&nbsp;Keiji Tateishi ,&nbsp;Hiroaki Aihara ,&nbsp;Yusuke Suda ,&nbsp;Masashi Yokoyama ,&nbsp;Takayuki Omura ,&nbsp;Mark Robert Vagins","doi":"10.1016/j.nuclphysbps.2014.09.052","DOIUrl":"10.1016/j.nuclphysbps.2014.09.052","url":null,"abstract":"<div><p>We are developing a hybrid photo detector (HPD) for the Hyper-Kamiokande Project. Eight-inch HPDs were prepared to evaluate their performance. Based on the results from these measurements, HPDs achieve a better performance such as single photon separation than conventional PMTs. A verification study lasting a few years in a water tank is planned in 2013 to check their feasibility.</p></div>","PeriodicalId":93343,"journal":{"name":"Nuclear physics. B, Proceedings, supplements","volume":"253 ","pages":"Pages 208-209"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.nuclphysbps.2014.09.052","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"110326918","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}

{"title":"A Highly intense DC muon source, MuSIC and muon CLFV search","authors":"Y. Hino ,&nbsp;Y. Kuno ,&nbsp;A. Sato ,&nbsp;H. Sakamoto ,&nbsp;Y. Matsumoto ,&nbsp;N.H. Tran ,&nbsp;I.H. Hashim ,&nbsp;M. Fukuda ,&nbsp;Y. Hayashida ,&nbsp;T. Ogitsu ,&nbsp;A. Yamamoto ,&nbsp;M. Yoshida","doi":"10.1016/j.nuclphysbps.2014.09.051","DOIUrl":"10.1016/j.nuclphysbps.2014.09.051","url":null,"abstract":"<div><p>MuSIC is a new muon facility, which provides the world's highest intense muon beam with continuous time structure at Research Center of Nuclear Physics (RCNP), Osaka University. It's intensity is designed to be 10⁸ muons per second with only 0.4 kW proton beam. Such a high intense muon beam is very important for searches of rare decay processes, for example search for the muon to electron conversion.</p></div>","PeriodicalId":93343,"journal":{"name":"Nuclear physics. B, Proceedings, supplements","volume":"253 ","pages":"Pages 206-207"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.nuclphysbps.2014.09.051","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"95766538","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}

{"title":"Project of Muon LFV at J-PARC","authors":"Hajime Nishiguchi,&nbsp;COMET collaboration","doi":"10.1016/j.nuclphysbps.2014.09.008","DOIUrl":"10.1016/j.nuclphysbps.2014.09.008","url":null,"abstract":"<div><p>The COMET Experiment at J-PARC aims to search for a lepton-flavour violating process of muon to electron conversion in a muonic atom, <span><math><msup><mrow><mi>μ</mi></mrow><mrow><mo>−</mo></mrow></msup><mi>N</mi><mo>→</mo><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup><mi>N</mi></math></span>, with a branching-ratio sensitivity of better than <span><math><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>16</mn></mrow></msup></math></span> in order to explore the parameter region predicted by most of well-motivated theoretical models beyond the Standard Model. The need for this sensitivity places several stringent requirements on both the beam-line and detector systems. The current R&amp;D status and prospects of experiment are presented in addition to the experimental overview.</p></div>","PeriodicalId":93343,"journal":{"name":"Nuclear physics. B, Proceedings, supplements","volume":"253 ","pages":"Pages 29-32"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.nuclphysbps.2014.09.008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"106133690","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}