scholarly journals New Physics search in rare $\tau$ decays at Belle and prospects at Belle II

2017 ◽  
Author(s):  
Nobuhiro Shimizu ◽  
Keyword(s):  
New Physics ◽  
Tau Decays ◽  
Belle Ii ◽  
New Physics Search

scholarly journals Non-standard interactions in $\tau^- \to (\pi^-\eta,\pi^-\pi^0)\nu_{\tau}$ decays

2019 ◽  
Author(s):  
Gabriel Lopez Castro
Keyword(s):  
Weak Interactions ◽  
High Energy ◽  
New Physics ◽  
Tau Lepton ◽  
Tau Decays ◽  
Set Constraints ◽  
Belle Ii ◽  
Lepton Decays ◽  
Energy Processes ◽  
New Interactions

Originally thought as clean processes to study the hadronization of the weak currents, semileptonic tau lepton decays can be useful to set constraints on non-standard (NS) weak interactions. We study the effects of new interactions in \tau^- \to (\pi^-\eta,\pi^-\pi^0)\nu_{\tau}τ−→(π−η,π−π0)ντ decays and find that they are sensitive probes of these New Physics effects in the form of scalar and tensor interactions, respectively. Further improved measurements at Belle II will set limits on these scalar interactions that are similar to other low and high energy processes.

scholarly journals Tau polarimetry in B meson decays

2019 ◽  
Author(s):  
Rodrigo Alonso ◽  
Jorge Martin Camalich ◽  
Susanne Westhoff
Keyword(s):  
B Meson ◽  
New Physics ◽  
B Meson Decays ◽  
Meson Decays ◽  
Tau Decays ◽  
Decay Products ◽  
Recent Developments ◽  
Belle Ii ◽  
Polarization Observables ◽  
Hadronic Tau

This article summarizes recent developments in B\to D^{(\ast)}\tau\nuB→D(*)τν decays. We explain how to extract the tau lepton’s production properties from the kinematics of its decay products. The focus is on hadronic tau decays, which are most sensitive to the tau polarizations. We present new results for effects of new physics in tau polarization observables and quantify the observation prospects at BELLE II.

scholarly journals Impact of on the New Physics search in decay

2013 ◽  
Vol 868 (2) ◽  
pp. 368-382 ◽  
Author(s):  
Damir Bečirević ◽  
Andrey Tayduganov
Keyword(s):  
New Physics ◽  
New Physics Search

scholarly journals The Belle II Experiment at the SuperKEKB

2019 ◽  
Vol 218 ◽  
pp. 07003
Author(s):  
Chang-Zheng Yuan
Keyword(s):  
Standard Model ◽  
Precision Measurement ◽  
New Physics ◽  
Beyond The Standard Model ◽  
Heavy Flavor ◽  
High Precision Measurement ◽  
The Standard Model ◽  
The Status ◽  
Belle Ii ◽  
Belle Experiment

Belle II experiment at the SuperKEKB collider is a major upgrade of the Belle experiment at the KEKB asymmetric e+e− collider at the KEK. The experiment will focus on the search for new physics beyond the standard model via high precision measurement of heavy flavor decays and search for rare signals. In this talk, we present the status of the SuperKEKB collider and the Belle II detector.

scholarly journals Relativistic effects in the search for new intra-atomic force with isotope shifts

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Minoru Tanaka ◽  
Yasuhiro Yamamoto
Keyword(s):  
Particle Physics ◽  
Relativistic Effects ◽  
Mass Range ◽  
New Physics ◽  
Wave Functions ◽  
Isotope Shifts ◽  
Atomic Force ◽  
The Standard Model ◽  
Nonrelativistic Calculation ◽  
New Physics Search

Abstract Isotope shift of atomic spectra is considered as a probe of new interaction between electrons and neutrons in atoms. We employ the method of seeking a breakdown of King’s linearity in the isotope shifts of two atomic transitions. In the present work, we evaluate the magnitudes of the nonlinearity using relativistic wave functions and the result is compared with that of nonrelativistic wave functions from our previous work. It turns out that the nonrelativistic calculation underestimates the nonlinearity owing to the new interaction in the mass range of the mediator greater than 1 MeV. Further, we find that the nonlinearity within the standard model of particle physics is significantly magnified by the relativistic effect in the $\text{p}_{1/2}$ state. To get rid of this obstacle in the new physics search, we suggest avoiding $\text{p}_{1/2}$ and that e.g. $\text{p}_{3/2}$ should be used instead.

scholarly journals New physics search at the LHC via Zʹ resonance

2010 ◽  
Author(s):  
Hye-Sung Lee ◽  
George Alverson ◽  
Pran Nath ◽  
Brent Nelson
Keyword(s):  
New Physics ◽  
New Physics Search

scholarly journals New-Physics Search through

2006 ◽  
Vol 157 (1) ◽  
pp. 246-250 ◽  
Author(s):  
Bohdan Grzadkowski ◽  
Zenrō Hioki ◽  
Kazumasa Ohkuma ◽  
José Wudka
Keyword(s):  
New Physics ◽  
New Physics Search
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