scholarly journals Decay rates, structure functions and new physics effects in hadronic tau decays

1996 ◽  
Author(s):  
Markus Finkemeier ◽  
Erwin Mirkes
Keyword(s):  
Structure Functions ◽  
New Physics ◽  
Decay Rates ◽  
Tau Decays ◽  
Hadronic Tau

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 Semileptonic τ decays: powerful probes of non-standard charged current weak interactions

2019 ◽  
Vol 212 ◽  
pp. 08002 ◽  
Author(s):  
Pablo Roig
Keyword(s):  
Weak Interactions ◽  
High Energy ◽  
New Physics ◽  
Effective Field ◽  
Low Energy ◽  
Effective Theory ◽  
Tau Decays ◽  
The Standard Model ◽  
Precision Observables ◽  
Hadronic Tau

When looking for heavy (O(few TeV)) New Physics, the most efficient way to bene?t from both high and low-energy measurements simultaneously is the use of the Standard Model Effective Field Theory (SMEFT). In this talk I highlight the importance of semileptonic τ decays in complementing, in this respect, the traditional low-energy precision observables and high-energy measurements. This is yet another reason for considering hadronic tau decays as golden channels at Belle-II beyond the unquestionable interest of the CP violation anomaly in τ → KS πντ decays, that I also discuss within the effective theory. A couple of new results for τ−→ K− ντ decays are also included.

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 Confronting hadronic tau decays with non-leptonic kaon decays

2018 ◽  
Vol 300-302 ◽  
pp. 131-136
Author(s):  
Antonio Rodríguez-Sánchez ◽  
Antonio Pich
Keyword(s):  
Kaon Decays ◽  
Tau Decays ◽  
Hadronic Tau

scholarly journals Hadronic tau decays atBaBar

2008 ◽  
Vol 110 (5) ◽  
pp. 052041
Author(s):  
I M Nugent
Keyword(s):  
Tau Decays ◽  
Hadronic Tau

scholarly journals η′K PUZZLE OF B MESON DECAYS AND NEW PHYSICS EFFECTS IN THE TC2 MODEL

2001 ◽  
Vol 16 (07) ◽  
pp. 441-455 ◽  
Author(s):  
ZHENJUN XIAO ◽  
WENJUN LI ◽  
GONGRU LU ◽  
LIBO GUO
Keyword(s):  
Standard Model ◽  
B Meson ◽  
New Physics ◽  
Decay Rates ◽  
Low Energy ◽  
Effective Hamiltonian ◽  
B Meson Decays ◽  
The Standard Model ◽  
Model Predictions ◽  
Input Parameters

Using the low energy effective Hamiltonian with the generalized factorization, we calculate the new physics contributions to B→π+π-, Kπ and Kη′ in the topcolor-assisted-technicolor (TC2) model, and compare the results with the available data. By using [Formula: see text] preferred by the CLEO data of B→π+π-decay, we find that the new physics enhancements to B→ Kη′ decays are significant in size, ~ 50% with respect to the standard model predictions, insensitive to the variations of input parameters and hence provide a simple and plausible new physics interpretation for the observed unexpectedly large B→ Kη′ decay rates.

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