Test of the universality of τ and μ lepton couplings in W-boson decays with the ATLAS detector
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00548599" target="_blank" >RIV/68378271:_____/21:00548599 - isvavai.cz</a>
Result on the web
<a href="http://hdl.handle.net/11104/0324647" target="_blank" >http://hdl.handle.net/11104/0324647</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41567-021-01236-w" target="_blank" >10.1038/s41567-021-01236-w</a>
Alternative languages
Result language
angličtina
Original language name
Test of the universality of τ and μ lepton couplings in W-boson decays with the ATLAS detector
Original language description
The standard model of particle physics encapsulates our best current understanding of physics at the smallest scales. A fundamental axiom of this theory is the universality of the couplings of the different generations of leptons to the electroweak gauge bosons. The measurement of the ratio of the decay rate of W bosons to τ leptons and muons, R(τ/μ), constitutes an important test of this axiom. Using 139 fb−1^{−1}−1 of proton–proton collisions recorded with the ATLAS detector at a centre-of-mass energy of 13 TeV, we report a measurement of this quantity from di-leptonic tt‾toverline{t}tt events where the top quarks decay into a W boson and a bottom quark. We can distinguish muons originating from W bosons and those originating from an intermediate τ lepton through the muon transverse impact parameter and differences in the muon transverse momentum spectra.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
<a href="/en/project/LTT17018" target="_blank" >LTT17018: Getting new knowledge of the microworld using the CERN infrastructure</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nature Physics
ISSN
1745-2473
e-ISSN
1745-2481
Volume of the periodical
17
Issue of the periodical within the volume
7
Country of publishing house
GB - UNITED KINGDOM
Number of pages
6
Pages from-to
813-818
UT code for WoS article
000669764700003
EID of the result in the Scopus database
2-s2.0-85111587526