scholarly journals Higher Order Corrections to Spin Correlations in Top Quark Pair Production at the LHC

2019 ◽  
Vol 123 (8) ◽  
Author(s):  
Arnd Behring ◽  
Michał Czakon ◽  
Alexander Mitov ◽  
Rene Poncelet ◽  
Andrew S. Papanastasiou
Keyword(s):  
Pair Production ◽  
Top Quark ◽  
Higher Order ◽  
Spin Correlations ◽  
Higher Order Corrections

scholarly journals Maximizing spin correlations in top quark pair production at the Tevatron

1997 ◽  
Vol 411 (1-2) ◽  
pp. 173-179 ◽  
Author(s):  
Gregory Mahlon ◽  
Stephen Parke
Keyword(s):  
Pair Production ◽  
Top Quark ◽  
Spin Correlations

scholarly journals MASS SHELL SMEARING EFFECTS IN TOP PAIR PRODUCTION

2012 ◽  
Vol 27 (13) ◽  
pp. 1250072 ◽  
Author(s):  
V. I. KUKSA ◽  
R. S. PASECHNIK ◽  
D. E. VLASENKO
Keyword(s):  
Pair Production ◽  
Cross Sections ◽  
Top Quark ◽  
Preliminary Analysis ◽  
Mass Shell ◽  
Threshold Region ◽  
Suggested Approach ◽  
Unstable Particles ◽  
Higher Order Corrections ◽  
Good Agreement

The top quark pair production and decay are considered in the framework of the smeared-mass unstable particles model. The results for total and differential cross-sections in vicinity of [Formula: see text] threshold are in good agreement with the previous ones in the literature. The strategy of calculations of the higher order corrections in the framework of the model is discussed. Suggested approach significantly simplifies calculations compared to the standard perturbative one and can serve as a convenient tool for fast and precise preliminary analysis of processes involving intermediate timelike top quark exchanges in the near-threshold region.

scholarly journals Spin correlations in top-quark pair production at e+e− colliders

1996 ◽  
Vol 387 (1) ◽  
pp. 199-206 ◽  
Author(s):  
Stephen Parke ◽  
Yael Shadmi
Keyword(s):  
Pair Production ◽  
Top Quark ◽  
Spin Correlations

scholarly journals Spin Correlations in Top Quark Pair Production Near Threshold at the e + e - Linear Collider

2003 ◽  
Vol 40 (6) ◽  
pp. 687-692 ◽  
Author(s):  
Zhang Qing-Jun ◽  
Li Chong-Sheng ◽  
Liu Jian-Jun ◽  
Jin Li-Gang
Keyword(s):  
Pair Production ◽  
Top Quark ◽  
Linear Collider ◽  
Spin Correlations ◽  
Near Threshold

scholarly journals Higher-order corrections for tW production at high-energy hadron colliders

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Nikolaos Kidonakis ◽  
Nodoka Yamanaka
Keyword(s):  
Cross Sections ◽  
Top Quark ◽  
High Energy ◽  
Higher Order ◽  
Distribution Functions ◽  
Soft Gluon ◽  
Parton Distribution Functions ◽  
Proton Proton ◽  
Rapidity Distributions ◽  
Higher Order Corrections

Abstract We discuss cross sections for tW production in proton-proton collisions at the LHC and at higher-energy colliders with energies of up to 100 TeV. We find that, remarkably, the soft-gluon corrections are numerically dominant even at very high collider energies. We present results with soft-gluon corrections at approximate NNLO and approximate N3LO matched to complete NLO results. These higher-order corrections are large and need to be included for better theoretical accuracy and smaller scale dependence. Total cross sections as well as top-quark and W-boson transverse-momentum and rapidity distributions are presented using various recent sets of parton distribution functions.

scholarly journals Probing the spin correlations of $$t{\bar{t}} $$ production at NLO QCD+EW

2021 ◽  
Vol 81 (9) ◽  
Author(s):  
Rikkert Frederix ◽  
Ioannis Tsinikos ◽  
Timea Vitos
Keyword(s):  
Pair Production ◽  
Top Quark ◽  
Correlation Coefficients ◽  
Spin Correlation ◽  
Spin Correlations ◽  
Scale Uncertainty ◽  
Narrow Width Approximation ◽  
Uncertainty Band ◽  
Fixed Order ◽  
Narrow Width

AbstractIn this work we investigate the NLO QCD+EW corrections to the top quark pair production and their effects on the spin correlation coefficients and asymmetries at fixed-order top quark pair production and LO decay in the dilepton channel, within the narrow-width approximation. The spin correlations are implicitly measured through the lepton kinematics. Moreover we study the EW effects to the leptonic differential distributions. We find that the EW corrections to the $$t {\bar{t}}$$ t t ¯ production are within the NLO QCD theoretical uncertainties for the spin correlation coefficients and the leptonic asymmetries. On the other hand, for the differential distributions we find that the EW corrections exceed the NLO QCD scale uncertainty band in the high rapidity regimes and are of the order of the NLO QCD scale uncertainty in the case of invariant mass and transverse momentum distributions.

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