Study of semi-boosted top quark reconstruction performance on the line shape of a t(t)over-bar resonance

被引：0
|
作者：
Pacalt, Josef [1 ]
Kvita, Jiri [1 ]
机构：
[1] Czech Acad Sci, Joint Lab Opt Palacky Univ Olomouc & Inst Phys, Av 17 Listopadu 50A, Olomouc 77207, Czech Republic
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2022年 / 37卷 / 16期
关键词：
Top quark; scalar resonance; differential cross-sections; unfolding; signal significance; semi-boosted regime;
D O I：
10.1142/S0217751X2250110X
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 study the top quark pair events production in pp collisions in the l + jets channel at the energy of root s = 14 TeV for Standard Model as well as new physics processes. We explore the usage of semi-boosted topologies where the top quark decays into a high-transverse momentum (boosted) hadronic W-jet and an isolated b-jet and study their performance in the t (t) over bar events kinematic reconstruction. An important event fraction is recovered and the correlation of selected kinematic variables between the detector and particle level is studied. Quality of the reconstructed mass line shape of a hypothetical scalar resonance decaying into t (t) over bar is evaluated and compared for regimes of a different degree of the transverse boost. Unfolding performance is checked in terms of comparing the excess of events in spectra before and after the unfolding, concluding with the proof of a signal significance loss after the unfolding procedure for both energy and angle related observables, with possible applications for current LHC experiments.
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页数：27
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