Boosted and semi-boosted all-hadronic t(t)over-bar reconstruction performance on kinematic variables for selected BSM models using a 2D extension of the BUMPHUNTER algorithm

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F24%3A73627640" target="_blank" >RIV/61989592:15310/24:73627640 - isvavai.cz</a>

Výsledek na webu

<a href="https://obd.upol.cz/id_publ/333207527" target="_blank" >https://obd.upol.cz/id_publ/333207527</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1142/S0217751X24300023" target="_blank" >10.1142/S0217751X24300023</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Boosted and semi-boosted all-hadronic t(t)over-bar reconstruction performance on kinematic variables for selected BSM models using a 2D extension of the BUMPHUNTER algorithm

Popis výsledku v původním jazyce

In this paper, we explore the usage of boosted as well as semi-boosted topologies in all-hadronic t (t) over bar final states in simulated pp collisions at root s=14TeV, with top quarks decaying into a boosted hadronic top-jet or a W-jet and an isolated b-jet. Correlations between selected kinematic variables and their shapes are studied for scalar and vector resonances decaying to a pair of top quarks, and also for a models of t (t) over bar -associated production with an invisible dark matter particle pair. Stacked signal+background samples have been investigated in terms of the ability to resolve an excess of events over the Standard Model background in terms of the t (t) over bar invariant mass, top quark transverse momentum and other 1D and 2D spectra using a parameterized detector simulation. A 2D extension of the BumpHunter algorithm is proposed, resulting in an improved signal sensitivity in specific 2D areas. We identify the most promising variables with the largest signal significance and smaller sensitivity to experimental uncertainties related to the jet energy calibration. We compare to statistical tests computing the background-only hypothesis compatibility and a likelihood fit of the signal strength.

Název v anglickém jazyce

Boosted and semi-boosted all-hadronic t(t)over-bar reconstruction performance on kinematic variables for selected BSM models using a 2D extension of the BUMPHUNTER algorithm

Popis výsledku anglicky

In this paper, we explore the usage of boosted as well as semi-boosted topologies in all-hadronic t (t) over bar final states in simulated pp collisions at root s=14TeV, with top quarks decaying into a boosted hadronic top-jet or a W-jet and an isolated b-jet. Correlations between selected kinematic variables and their shapes are studied for scalar and vector resonances decaying to a pair of top quarks, and also for a models of t (t) over bar -associated production with an invisible dark matter particle pair. Stacked signal+background samples have been investigated in terms of the ability to resolve an excess of events over the Standard Model background in terms of the t (t) over bar invariant mass, top quark transverse momentum and other 1D and 2D spectra using a parameterized detector simulation. A 2D extension of the BumpHunter algorithm is proposed, resulting in an improved signal sensitivity in specific 2D areas. We identify the most promising variables with the largest signal significance and smaller sensitivity to experimental uncertainties related to the jet energy calibration. We compare to statistical tests computing the background-only hypothesis compatibility and a likelihood fit of the signal strength.

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/GA19-21484S" target="_blank" >GA19-21484S: Nové techniky rekonstrukce boostovaných top kvarků pro hledání nové fyziky na LHC</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

INTERNATIONAL JOURNAL OF MODERN PHYSICS A

ISSN

0217-751X

e-ISSN

1793-656X

Svazek periodika

39

Číslo periodika v rámci svazku

11n12

Stát vydavatele periodika

SG - Singapurská republika

Počet stran výsledku

51

Strana od-do

"2430002-1"-"2430002-51"

Kód UT WoS článku

001255269900001

EID výsledku v databázi Scopus

2-s2.0-85194926453