Event patterns extracted from top quark-related spectra in proton-proton collisions at 8 TeV

TL;DR

This paper analyzes top quark spectra from 8 TeV proton-proton collisions, modeling the data with QCD-inspired and hydrodynamic models, and reconstructs event patterns in velocity, momentum, and rapidity spaces.

Contribution

It introduces a combined modeling approach for top quark spectra and reconstructs detailed event patterns in multiple phase spaces.

Findings

Model fits the experimental data well.

Event pattern distributions are successfully reconstructed.

Provides insights into top quark production dynamics.

Abstract

We analyze the transverse momentum ($p_T$) and rapidity ($y$) spectra of top quark pairs, hadronic top quarks, and top quarks produced in proton-proton ($pp$) collisions at center-of-mass energy $\sqrt{s}=8$ TeV. For $p_T$ spectra, we use the superposition of the inverse power-law suggested by the QCD (quantum chromodynamics) calculus and the Erlang distribution resulting from a multisource thermal model. For $y$ spectra, we use the two-component Gaussian function resulting from the revised Landau hydrodynamic model. The modelling results are in agreement with the experimental data measured at the detector level, in the fiducial phase-space, and in the full phase-space by the ATLAS Collaboration at the Large Hadron Collider (LHC). Based on the parameter values extracted from $p_T$ and $y$ spectra, the event patterns in three-dimensional velocity ($\beta_x$-$\beta_y$-$\beta_z$), momentum ($p_x$-$p_y$-$p_z$), and rapidity ($y_1$-$y_2$-$y$) spaces are obtained, and the probability distributions of these components are also obtained.