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SUMMARY:Tau physics at Belle II
DTSTART;VALUE=DATE-TIME:20190301T040000Z
DTEND;VALUE=DATE-TIME:20190301T042000Z
DTSTAMP;VALUE=DATE-TIME:20260513T225813Z
UID:indico-contribution-92-597@indico.inp.nsk.su
DESCRIPTION:Speakers: Petar RADOS (Deutsches Elektronen-Synchrotron (DESY)
 )\nThe Belle II experiment is a detector coupled to the SuperKEKB\nelectro
 n-positron accelerator\, located in Tsukuba\, Japan. From April to July\no
 f 2018\, Belle II completed the Phase II of commissioning in which ~500 pb
 -1\nof data was recorded. Phase III will start in 2019 and\, by 2025\, a d
 ataset\nof 50 ab-1 is expected. This large dataset will provide a unique o
 pportunity\nto study tau lepton physics with high precision. In this talk\
 , the tau\nlepton rediscovery and mass measurement using the Phase II data
  will be\npresented\, followed by a review of the tau physics program for 
 Phase III.\n\nhttps://indico.inp.nsk.su/event/15/contributions/597/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/597/
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BEGIN:VEVENT
SUMMARY:Semileptonic tau decays: Powerful probes of non-standard charged c
 urrent weak interactions
DTSTART;VALUE=DATE-TIME:20190301T030000Z
DTEND;VALUE=DATE-TIME:20190301T032000Z
DTSTAMP;VALUE=DATE-TIME:20260513T225813Z
UID:indico-contribution-92-676@indico.inp.nsk.su
DESCRIPTION:Speakers: Pablo Roig (Cinvestav)\nTraditionally\, nuclear beta
  decays and radiative pion decays have been\nthought as the best processes
  to look for non-standard charged current\nweak interactions involving lig
 ht quarks. We put forward recently that\nsemileptonic tau decays are power
 ful probes in this respect\, too. Last\nadvances in this direction will be
  reviewed and compared to limits from\nother low-energy processes and LHC 
 bounds.\n\nhttps://indico.inp.nsk.su/event/15/contributions/676/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/676/
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BEGIN:VEVENT
SUMMARY:Tau mass measurement at BES-III
DTSTART;VALUE=DATE-TIME:20190301T024000Z
DTEND;VALUE=DATE-TIME:20190301T030000Z
DTSTAMP;VALUE=DATE-TIME:20260513T225813Z
UID:indico-contribution-92-677@indico.inp.nsk.su
DESCRIPTION:Speakers: Ivan Nikolaev (Budker Insitute of Nuclear Physics)\n
 We had performed a tau threshold scan with $\\int L \\approx 130~pb^{-1}$ 
 for a\nnew tau-lepton mass measurement  with BES-III detector in 2018. The
  beam energy\nis determined by laser backscattering and high-purity german
 ium detector which\nis calibrated by $\\gamma$-sources. We have done $J/\\
 psi$ and $\\psi(2S)$-meson\nscans to examine beam energy measurement syste
 m.  In this report we present\npreliminary result of the tau mass measurem
 ent.\n\nhttps://indico.inp.nsk.su/event/15/contributions/677/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/677/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Light mesons from τ decays
DTSTART;VALUE=DATE-TIME:20190301T042000Z
DTEND;VALUE=DATE-TIME:20190301T044000Z
DTSTAMP;VALUE=DATE-TIME:20260513T225813Z
UID:indico-contribution-92-599@indico.inp.nsk.su
DESCRIPTION:Speakers: Sergi Gonzàlez-Solís (Department of Physics\, Indi
 ana University)\nThe τ is the only lepton massive enough to decay into ha
 drons. Its semilep-\ntonic decays provide a privileged scenario to study l
 ow-energy effects of the strong\ninteractions under rather clean condition
 s. Such advantageous framework is used to\nimprove our understanding of th
 e hadronization of QCD currents\, to study meson\nform factors and to extr
 act the physical parameters of the intermediate resonances\nproduced in th
 e decay. In this talk\, we will review the status of the hadronic τ decay
 \nmodes with particular attention to its decays into two hadrons. By explo
 iting the\nsynergy between dispersion relations and Chiral Perturbation Th
 eory we describe\nthe meson from factors that come up into play. We will a
 lso briefly review higher-\nmultiplicity decay modes. These involve a rich
 er dynamical structure but accounting\nfor the strong rescattering effects
  is not an easy task when three or more hadrons\nare present. The fantasti
 c possibilities offered by the Belle-II experiment to study\nτ physics an
 d low multiplicity final states with high precision make these studies of\
 ntimely interest.\n\nhttps://indico.inp.nsk.su/event/15/contributions/599/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/599/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Recent results on tau lepton from Belle
DTSTART;VALUE=DATE-TIME:20190301T054000Z
DTEND;VALUE=DATE-TIME:20190301T060000Z
DTSTAMP;VALUE=DATE-TIME:20260513T225813Z
UID:indico-contribution-92-608@indico.inp.nsk.su
DESCRIPTION:Speakers: Yifan Jin (The university of Tokyo)\nThe world's lar
 gest statistic of tau is collected with Belle detector. Recently\, we meas
 ure the branching fraction for tau- -> pi- l+ l- nu\, which is predicted b
 y the Standard Model but not yet probed due to its small branching fractio
 n (O(10^-5)). In this presentation\, we show the measured result of this m
 ode and briefly report the status of other on-going analyses at Belle\, th
 e branching fraction of tau decay into three leptons and two neutrinos\, t
 he evaluation of Michel parameters using tau- -> l- nu nu and the branchin
 g fraction of tau decay into three hadrons and one neutrino.\n\nhttps://in
 dico.inp.nsk.su/event/15/contributions/608/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/608/
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BEGIN:VEVENT
SUMMARY:Measurement of Michel parameters in tau decays at high luminosity 
 e+ e- factories
DTSTART;VALUE=DATE-TIME:20190301T044000Z
DTEND;VALUE=DATE-TIME:20190301T050000Z
DTSTAMP;VALUE=DATE-TIME:20260513T225813Z
UID:indico-contribution-92-650@indico.inp.nsk.su
DESCRIPTION:Speakers: Denis Epifanov (BINP)\nMichel parameters (MP) define
  the Lorentz structure of the Charged Weak\nInteraction mediated by W boso
 n in the Standard Model (SM). \nThey are in the list of the basic properti
 es of tau lepton. \nThe difference of the measured MP from their SM expect
 ation \nwill exhibit clear signature of the New Physics. \nWe discuss the 
 key points of the analysis of the huge data \nsample of taus collected at 
 Belle to measure MP\nin leptonic tau decays. Essential point of the analys
 is is to \nconsider the spin-spin correlation of taus\, which allows us to
  \nextract MP related to tau polarization. At the e+ e- factories \nwith u
 npolarized beams one have to analyze decay products of \nboth taus to be s
 ensitive to the spin-spin correlation. \nNonzero average polarization of s
 ingle tau at the Super \nCharm-Tau factory with polarized e- beam provides
  unique \npossibility to measure all Michel parameters without tagging \nt
 he opposite tau.\n\nhttps://indico.inp.nsk.su/event/15/contributions/650/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/650/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Physics with tau leptons at CMS
DTSTART;VALUE=DATE-TIME:20190301T050000Z
DTEND;VALUE=DATE-TIME:20190301T052000Z
DTSTAMP;VALUE=DATE-TIME:20260513T225813Z
UID:indico-contribution-92-659@indico.inp.nsk.su
DESCRIPTION:Speakers: Vladimir Cherepanov (UF)\nTau lepton is an important
  tool for new physics searches at the LHC. This talk focuses on the measur
 ement of the reconstruction and identification performance of the hadronic
  tau decays by the CMS detector. The measurements include the performance 
 of the identification\, trigger\, energy calibration and decay mode classi
 fication algorithms for reconstructed tau candidates. Applications of the 
 developed tau reconstruction algorithms to physics measurements with tau l
 eptons at CMS detector are also presented.\n\nhttps://indico.inp.nsk.su/ev
 ent/15/contributions/659/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/659/
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BEGIN:VEVENT
SUMMARY:Recent results on tau lepton from BaBar
DTSTART;VALUE=DATE-TIME:20190227T054000Z
DTEND;VALUE=DATE-TIME:20190227T060000Z
DTSTAMP;VALUE=DATE-TIME:20260513T225813Z
UID:indico-contribution-92-666@indico.inp.nsk.su
DESCRIPTION:Speakers: Alberto Lusiani (Scuola Normale Superiore)\nWe prese
 nt measurements of the branching fractions of tau- to K- (pi-)\nn pi0 nu_t
 au\, and the branching fraction and spectral function of tau-\nto K- K0 nu
 _tau\, obtained with the full data sample collected by the\nBaBar experime
 nt at PEP-II. Implications on the determination of Vus\nwith tau decays wi
 ll be discussed.\n\nhttps://indico.inp.nsk.su/event/15/contributions/666/
LOCATION:Budker INP
URL:https://indico.inp.nsk.su/event/15/contributions/666/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hadronic Decays of the tau Lepton
DTSTART;VALUE=DATE-TIME:20190301T032000Z
DTEND;VALUE=DATE-TIME:20190301T034000Z
DTSTAMP;VALUE=DATE-TIME:20260513T225813Z
UID:indico-contribution-92-678@indico.inp.nsk.su
DESCRIPTION:Speakers: Emilie Passemar (Indiana University/JLab)\nSeveral e
 xperimental collaborations have recently invested considerable effort in p
 recision studies of hadronic tau decays. \nWith further improvements expec
 ted at Belle-II\, it is important to discuss the theoretical implications 
 of these experimental advances. In this talk\, I will review several such 
 implications. First\, we will show that hadronic tau decays represent a cl
 ean laboratory \nfor the precise study of Quantum Chromodynamics (QCD) in 
 its non perturbative regime. \nSecond\, these decays can be used as a prob
 e of the electroweak interaction. In this respect\, we will discuss how ta
 u decays and in particular $\\tau \\to \\ell \\pi \\pi$ decays can be an i
 nteresting probe for lepton flavour violation allowing to unveil new pheno
 mena.\n\nhttps://indico.inp.nsk.su/event/15/contributions/678/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/678/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Leptonic decays of the tau lepton
DTSTART;VALUE=DATE-TIME:20190301T052000Z
DTEND;VALUE=DATE-TIME:20190301T054000Z
DTSTAMP;VALUE=DATE-TIME:20260513T225813Z
UID:indico-contribution-92-689@indico.inp.nsk.su
DESCRIPTION:Speakers: Matteo Fael (University of Siegen)\nI will review of
  theoretical aspects of the tau leptonic decays\, including the radiative 
 ($\\tau \\rightarrow l \\gamma \\nu \\bar \\nu $)  and the five-body ($\\t
 au \\rightarrow l l l \\nu \\bar \\nu$) decay modes\, which are among the 
 most powerful tools to study precisely the structure of the weak interacti
 on and to constrain possible contributions beyond the V–A coupling of th
 e Standard Model.\n\nhttps://indico.inp.nsk.su/event/15/contributions/689/
LOCATION: Conference room
URL:https://indico.inp.nsk.su/event/15/contributions/689/
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