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

被引：0

作者：

Kvita, Jiri ^{[1
,2
]}

机构：

[1] iHETA, Prague, Czech Republic

[2] Palacky Univ, Inst Phys AS CR, Fac Sci, Olomouc, Czech Republic

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2024年 / 39卷 / 11N12期

关键词：

Top quark; boosted jets; BSM; signal significance; PROTON-PROTON COLLISIONS; MISSING TRANSVERSE-MOMENTUM; DARK-MATTER PRODUCTION; TOP-QUARK; ROOT-S=13 TEV; FINAL-STATE; PP COLLISIONS; LHC; SEARCH; JETS;

D O I：

10.1142/S0217751X24300023

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

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.

引用

页数：51

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