2010/07/31 by Yukinari Sumino, Hiroshi Yokoya
Physics and Astronomy · #Differential (mechanical device) #Distribution (mathematics) #Hadron #High-Energy Particle Collisions Research #Large Hadron Collider #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Quark #Quark model #Top quark #hep-ph
paper · pdf · doi:10.1007/jhep09(2010)034
published as JHEP 1009:034,2010 · 40 pages, 25 figures; minor corrections, references added; a typo in Eq. (B.9) corrected
openalex publication_date 2010/09/01 · arxiv created 2016/06/07 · arxiv updated 2016/06/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
First we present a theoretical framework to compute the fully differential cross sections for the top-quark productions and their subsequent decays at hadron colliders, incorporating the bound-state effects which are important in the tt threshold region. We include the bound-state effects such that the cross sections are correct in the LO approximation both in the threshold and high-energy regions. Then, based on this framework we compute various kinematical distributions of top quarks as well as of their decay products at the LHC, by means of Monte-Carlo event-generation. These are compared with the corresponding predictions based on conventional perturbative QCD. In particular, we find a characteristic bound-state effect on the ( bW+ ) - ( bW- ) double-invariant-mass distribution, which is deformed to the lower invariant-mass side in a correlated manner.