Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton plus jets final state in pp collisions at root s=13 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10406456" target="_blank" >RIV/00216208:11320/19:10406456 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=c7uiCu7v13" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=c7uiCu7v13</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-019-6688-5" target="_blank" >10.1140/epjc/s10052-019-6688-5</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton plus jets final state in pp collisions at root s=13 TeV

Popis výsledku v původním jazyce

A search is presented for a heavy spin- 1 resonance Z decaying to a top quark and a vector- like top quark partner T in the lepton + jets final state. The search is performed using a data set of pp collisions at a centre- of- mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb - 1 as recorded by the CMS experiment at the CERN LHC in the year 2016. The analysis is optimised for final states arising from the T decay modes to a top quark and a Higgs or Z boson ( T. Ht, Zt). The event selection makes use of resolved and merged top quark decay products, as well as decays of boosted Higgs bosons and Z and W bosons using jet substructure techniques. No significant deviation from the standard model background expectation is observed. Exclusion limits on the product of the cross section and branching fraction for Z . tT, T. Ht, Zt, Wb are presented for various combinations of the Z resonance mass and the vector- like T quark mass. These results represent the most stringent limits to date for the decay mode Z . tT. tHt. In a benchmark model with extra dimensions, invoking a heavy spin- 1 resonance G *, masses of the G * between 1.5 and 2.3 TeV and between 2.0 and 2.4 TeV are excluded for T masses of 1.2 and 1.5 TeV, respectively.

Název v anglickém jazyce

Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton plus jets final state in pp collisions at root s=13 TeV

Popis výsledku anglicky

A search is presented for a heavy spin- 1 resonance Z decaying to a top quark and a vector- like top quark partner T in the lepton + jets final state. The search is performed using a data set of pp collisions at a centre- of- mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb - 1 as recorded by the CMS experiment at the CERN LHC in the year 2016. The analysis is optimised for final states arising from the T decay modes to a top quark and a Higgs or Z boson ( T. Ht, Zt). The event selection makes use of resolved and merged top quark decay products, as well as decays of boosted Higgs bosons and Z and W bosons using jet substructure techniques. No significant deviation from the standard model background expectation is observed. Exclusion limits on the product of the cross section and branching fraction for Z . tT, T. Ht, Zt, Wb are presented for various combinations of the Z resonance mass and the vector- like T quark mass. These results represent the most stringent limits to date for the decay mode Z . tT. tHt. In a benchmark model with extra dimensions, invoking a heavy spin- 1 resonance G *, masses of the G * between 1.5 and 2.3 TeV and between 2.0 and 2.4 TeV are excluded for T masses of 1.2 and 1.5 TeV, respectively.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/LM2015058" target="_blank" >LM2015058: Výzkumná infrastruktura pro experimenty v CERN</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

European Physical Journal C

ISSN

1434-6044

e-ISSN

—

Svazek periodika

79

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

32

Strana od-do

208

Kód UT WoS článku

000460674700002

EID výsledku v databázi Scopus

2-s2.0-85063199426