Conveners
tau-lepton: tau-lepton
- There are no conveners in this block
tau-lepton
- Matteo Fael (University of Siegen)
- Pablo Roig (Cinvestav)
Dr
Alberto Lusiani
(Scuola Normale Superiore)
27/02/2019, 12:40
Tau-lepton physics
Invited Oral
We present measurements of the branching fractions of tau- to K- (pi-)
n pi0 nu_tau, and the branching fraction and spectral function of tau-
to K- K0 nu_tau, obtained with the full data sample collected by the
BaBar experiment at PEP-II. Implications on the determination of Vus
with tau decays will be discussed.
Dr
Ivan Nikolaev
(Budker Insitute of Nuclear Physics)
01/03/2019, 09:40
Tau-lepton physics
Invited Oral
We had performed a tau threshold scan with $\int L \approx 130~pb^{-1}$ for a
new tau-lepton mass measurement with BES-III detector in 2018. The beam energy
is determined by laser backscattering and high-purity germanium detector which
is calibrated by $\gamma$-sources. We have done $J/\psi$ and $\psi(2S)$-meson
scans to examine beam energy measurement system. In this report we...
Dr
Pablo Roig
(Cinvestav)
01/03/2019, 10:00
Tau-lepton physics
Invited Oral
Traditionally, nuclear beta decays and radiative pion decays have been
thought as the best processes to look for non-standard charged current
weak interactions involving light quarks. We put forward recently that
semileptonic tau decays are powerful probes in this respect, too. Last
advances in this direction will be reviewed and compared to limits from
other low-energy processes and LHC bounds.
Emilie Passemar
(Indiana University/JLab)
01/03/2019, 10:20
Tau-lepton physics
Invited Oral
Several experimental collaborations have recently invested considerable effort in precision studies of hadronic tau decays.
With further improvements expected 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 clean laboratory
for...
Dr
Petar RADOS
(Deutsches Elektronen-Synchrotron (DESY))
01/03/2019, 11:00
Tau-lepton physics
Invited Oral
The Belle II experiment is a detector coupled to the SuperKEKB
electron-positron accelerator, located in Tsukuba, Japan. From April to July
of 2018, Belle II completed the Phase II of commissioning in which ~500 pb-1
of data was recorded. Phase III will start in 2019 and, by 2025, a dataset
of 50 ab-1 is expected. This large dataset will provide a unique opportunity
to study tau lepton...
Dr
Sergi Gonzàlez-Solís
(Department of Physics, Indiana University)
01/03/2019, 11:20
Tau-lepton physics
Invited Oral
The τ is the only lepton massive enough to decay into hadrons. Its semilep-
tonic decays provide a privileged scenario to study low-energy effects of the strong
interactions under rather clean conditions. Such advantageous framework is used to
improve our understanding of the hadronization of QCD currents, to study meson
form factors and to extract the physical parameters of the...
Denis Epifanov
(BINP)
01/03/2019, 11:40
Tau-lepton physics
Contributed Oral
Michel parameters (MP) define the Lorentz structure of the Charged Weak
Interaction mediated by W boson in the Standard Model (SM).
They are in the list of the basic properties of tau lepton.
The difference of the measured MP from their SM expectation
will exhibit clear signature of the New Physics.
We discuss the key points of the analysis of the huge data
sample of taus collected...
Dr
Vladimir Cherepanov
(UF)
01/03/2019, 12:00
Tau-lepton physics
Invited Oral
Tau lepton is an important tool for new physics searches at the LHC. This talk focuses on the measurement 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 classification algorithms for reconstructed tau candidates. Applications of the...
Dr
Matteo Fael
(University of Siegen)
01/03/2019, 12:20
Tau-lepton physics
Invited Oral
I will review of theoretical aspects of the tau leptonic decays, including the radiative ($\tau \rightarrow l \gamma \nu \bar \nu $) and the five-body ($\tau \rightarrow l l l \nu \bar \nu$) decay modes, which are among the most powerful tools to study precisely the structure of the weak interaction and to constrain possible contributions beyond the V–A coupling of the Standard Model.
Yifan Jin
(The university of Tokyo)
01/03/2019, 12:40
Tau-lepton physics
Invited Oral
The world's largest statistic of tau is collected with Belle detector. Recently, we measure the branching fraction for tau- -> pi- l+ l- nu, which is predicted by the Standard Model but not yet probed due to its small branching fraction (O(10^-5)). In this presentation, we show the measured result of this mode and briefly report the status of other on-going analyses at Belle, the branching...
