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Title: Effective-field theory analysis of the τ K ( η ( ) , K 0 ) ν τ decays

Abstract

We analyze the decays $$\tau^-\to K^-(\eta^{(\prime)},K^0) \nu_\tau$$ within an effective field theory that includes the most general interactions between Standard Model fields up to dimension six, assuming left-handed neutrinos. In particular, we examine different interesting phenomenological observables i.e. decay spectra and branching ratio, Dalitz plot distributions and the forward-backward asymmetry, to explore the sensitivity of the corresponding decays to the effects of non-standard interactions. A controlled theoretical input on the Standard Model hadronic form factors, based on chiral symmetry, dispersion relations, data and asymptotic QCD properties, has allowed us to set bounds on the New Physics scalar and tensor effective couplings using the measured branching ratios. These are found to be in line with the findings of our series of previous analyses of two-meson tau decays and less precise than the constraints obtained from semileptonic kaon decays. In order to set stringent limits on these couplings, we will use all available experimental data of all possible di-meson tau decays. This is our next step plan, that we hope to be of interest for future experimental analyses of these decays.

Authors:
ORCiD logo; ; ;
Publication Date:
Research Org.:
Indiana Univ., Bloomington, IN (United States)
Sponsoring Org.:
USDOE; National Science Foundation (NSF)
OSTI Identifier:
1599500
Alternate Identifier(s):
OSTI ID: 1599352
Grant/Contract Number:  
FG02-87ER40365; PHY-1714253
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 101 Journal Issue: 3; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Effective Field Theories; Beyond Standard Model; Tau decays

Citation Formats

Gonzàlez-Solís, Sergi, Miranda, Alejandro, Rendón, Javier, and Roig, Pablo. Effective-field theory analysis of the τ − → K − ( η ( ′ ) , K 0 ) ν τ decays. United States: N. p., 2020. Web. doi:10.1103/PhysRevD.101.034010.
Gonzàlez-Solís, Sergi, Miranda, Alejandro, Rendón, Javier, & Roig, Pablo. Effective-field theory analysis of the τ − → K − ( η ( ′ ) , K 0 ) ν τ decays. United States. doi:10.1103/PhysRevD.101.034010.
Gonzàlez-Solís, Sergi, Miranda, Alejandro, Rendón, Javier, and Roig, Pablo. Tue . "Effective-field theory analysis of the τ − → K − ( η ( ′ ) , K 0 ) ν τ decays". United States. doi:10.1103/PhysRevD.101.034010.
@article{osti_1599500,
title = {Effective-field theory analysis of the τ − → K − ( η ( ′ ) , K 0 ) ν τ decays},
author = {Gonzàlez-Solís, Sergi and Miranda, Alejandro and Rendón, Javier and Roig, Pablo},
abstractNote = {We analyze the decays $\tau^-\to K^-(\eta^{(\prime)},K^0) \nu_\tau$ within an effective field theory that includes the most general interactions between Standard Model fields up to dimension six, assuming left-handed neutrinos. In particular, we examine different interesting phenomenological observables i.e. decay spectra and branching ratio, Dalitz plot distributions and the forward-backward asymmetry, to explore the sensitivity of the corresponding decays to the effects of non-standard interactions. A controlled theoretical input on the Standard Model hadronic form factors, based on chiral symmetry, dispersion relations, data and asymptotic QCD properties, has allowed us to set bounds on the New Physics scalar and tensor effective couplings using the measured branching ratios. These are found to be in line with the findings of our series of previous analyses of two-meson tau decays and less precise than the constraints obtained from semileptonic kaon decays. In order to set stringent limits on these couplings, we will use all available experimental data of all possible di-meson tau decays. This is our next step plan, that we hope to be of interest for future experimental analyses of these decays.},
doi = {10.1103/PhysRevD.101.034010},
journal = {Physical Review D},
number = 3,
volume = 101,
place = {United States},
year = {2020},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.101.034010

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