Search for a new scalar resonance in flavour-changing neutral-current top-quark decays t -> qX (q = u, c), with X -> bb(bar), in proton-proton collisions at CMS = 13 TeV with the ATLAS detector
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476304" target="_blank" >RIV/00216208:11320/23:10476304 - isvavai.cz</a>
Výsledek na webu
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=0YX-Mw6Gx" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=0YX-Mw6Gx</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP07(2023)199" target="_blank" >10.1007/JHEP07(2023)199</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Search for a new scalar resonance in flavour-changing neutral-current top-quark decays t -> qX (q = u, c), with X -> bb(bar), in proton-proton collisions at CMS = 13 TeV with the ATLAS detector
Popis výsledku v původním jazyce
A search for flavour-changing neutral-current decays of a top quark into anup-type quark (either up or charm) and a light scalar particle X decaying into a bottomanti-bottom quark pair is presented. The search focuses on top-quark pair productionwhere one top quark decays to qX, with X ! b-b, and the other top quark decays accordingto the Standard Model, with the W boson decaying leptonically. The final state is thuscharacterised by an isolated electron or muon and at least four jets. Events are categorisedaccording to the multiplicity of jets and jets tagged as originating from b-quarks, and aneural network is used to discriminate between signal and background processes. The dataanalysed correspond to 139 fb-1 of proton-proton collisions at a centre-of-mass energy of13TeV, recorded with the ATLAS detector at the LHC. The 95% confidence-level upperlimits between 0.019% and 0.062% are derived for the branching fraction B(t ! uX) andbetween 0.018% and 0.078% for the branching fraction B(t ! cX), for masses of the scalarparticle X between 20 and 160 GeV.
Název v anglickém jazyce
Search for a new scalar resonance in flavour-changing neutral-current top-quark decays t -> qX (q = u, c), with X -> bb(bar), in proton-proton collisions at CMS = 13 TeV with the ATLAS detector
Popis výsledku anglicky
A search for flavour-changing neutral-current decays of a top quark into anup-type quark (either up or charm) and a light scalar particle X decaying into a bottomanti-bottom quark pair is presented. The search focuses on top-quark pair productionwhere one top quark decays to qX, with X ! b-b, and the other top quark decays accordingto the Standard Model, with the W boson decaying leptonically. The final state is thuscharacterised by an isolated electron or muon and at least four jets. Events are categorisedaccording to the multiplicity of jets and jets tagged as originating from b-quarks, and aneural network is used to discriminate between signal and background processes. The dataanalysed correspond to 139 fb-1 of proton-proton collisions at a centre-of-mass energy of13TeV, recorded with the ATLAS detector at the LHC. The 95% confidence-level upperlimits between 0.019% and 0.062% are derived for the branching fraction B(t ! uX) andbetween 0.018% and 0.078% for the branching fraction B(t ! cX), for masses of the scalarparticle X between 20 and 160 GeV.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10300 - Physical sciences
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2023
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
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
51
Strana od-do
199
Kód UT WoS článku
001061847500001
EID výsledku v databázi Scopus
2-s2.0-85174264679