Searches for lepton-flavour-violating decays of the Higgs boson into e tau and μ tau in CMS = 13 TeV pp collisions with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476298" target="_blank" >RIV/00216208:11320/23:10476298 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=QJpykhyWHE" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=QJpykhyWHE</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP07(2023)166" target="_blank" >10.1007/JHEP07(2023)166</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Searches for lepton-flavour-violating decays of the Higgs boson into e tau and μ tau in CMS = 13 TeV pp collisions with the ATLAS detector

Popis výsledku v původním jazyce

This paper presents direct searches for lepton flavour violation in Higgs bosondecays, H ! e and H ! μ, performed using data collected with the ATLAS detectorat the LHC. The searches are based on a data sample of proton-proton collisions at acentre-of-mass energy ps = 13TeV, corresponding to an integrated luminosity of 138 fb-1.Leptonic ( ! &apos;&apos; ) and hadronic ( ! hadrons ) decays of the -lepton are considered.Two background estimation techniques are employed: the MC-template method, basedon data-corrected simulation samples, and the Symmetry method, based on exploitingthe symmetry between electrons and muons in the Standard Model backgrounds. Nosignificant excess of events is observed and the results are interpreted as upper limits onlepton-flavour-violating branching ratios of the Higgs boson. The observed (expected)upper limits set on the branching ratios at 95% confidence level, B(H ! e ) &lt; 0.20%(0.12%) and B(H ! μ) &lt; 0.18% (0.09%), are obtained with the MC-template methodfrom a simultaneous measurement of potential H ! e and H ! μ signals. The best-fitbranching ratio difference, B(H ! μ)-B(H ! e ), measured with the Symmetry methodin the channel where the -lepton decays to leptons, is (0.25 +- 0.10)%, compatible with avalue of zero within 2.5.

Název v anglickém jazyce

Searches for lepton-flavour-violating decays of the Higgs boson into e tau and μ tau in CMS = 13 TeV pp collisions with the ATLAS detector

Popis výsledku anglicky

This paper presents direct searches for lepton flavour violation in Higgs bosondecays, H ! e and H ! μ, performed using data collected with the ATLAS detectorat the LHC. The searches are based on a data sample of proton-proton collisions at acentre-of-mass energy ps = 13TeV, corresponding to an integrated luminosity of 138 fb-1.Leptonic ( ! &apos;&apos; ) and hadronic ( ! hadrons ) decays of the -lepton are considered.Two background estimation techniques are employed: the MC-template method, basedon data-corrected simulation samples, and the Symmetry method, based on exploitingthe symmetry between electrons and muons in the Standard Model backgrounds. Nosignificant excess of events is observed and the results are interpreted as upper limits onlepton-flavour-violating branching ratios of the Higgs boson. The observed (expected)upper limits set on the branching ratios at 95% confidence level, B(H ! e ) &lt; 0.20%(0.12%) and B(H ! μ) &lt; 0.18% (0.09%), are obtained with the MC-template methodfrom a simultaneous measurement of potential H ! e and H ! μ signals. The best-fitbranching ratio difference, B(H ! μ)-B(H ! e ), measured with the Symmetry methodin the channel where the -lepton decays to leptons, is (0.25 +- 0.10)%, compatible with avalue of zero within 2.5.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Svazek periodika

2023

Číslo periodika v rámci svazku

07

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

74

Strana od-do

166

Kód UT WoS článku

001061947900001

EID výsledku v databázi Scopus

2-s2.0-85165876369