Colored bosons on top FBA and angular cross section for $t\bar{t}$ production

Abstract

With full data set that corresponds to an integrated luminosity of 9.4 fb${}^{-1}$, CDF has updated the top quark forward-backward asymmetry (FBA) as functions of rapidity difference $|\Delta y|$ and $t\bar{t}$ invariant mass $M_{t\bar{t}}$. Beside the sustained inconsistency between experiments and standard model (SM) predictions at large $|\Delta y|$ and $M_{t\bar{t}}$, an unexpected large first Legendre moment with $a_1=0.39\pm 0.108$ is found. In order to solve the large top FBA, we study the contributions of color triplet scalar and color octet vector boson. We find that the top FBA at $|\Delta y|>1$ and $M_{t\bar{t}}>450$ GeV in triplet and octet model could be enhanced to be around 30% and 20%, whereas the first Legendre moment is $a_1^{\mathbf{Di}}=0.38$ and $a_1^{\mathbf{Axi}}=0.23$, respectively.

13 pages, 5 figures; references added

References in corpus (17)

• PYTHIA 6.4 Physics and Manual
• First measurement of the forward-backward charge asymmetry in top quark pair production
• Top Quarks, Axigluons and Charge Asymmetries at Hadron Colliders
• Effective-Field-Theory Approach to Top-Quark Production and Decay
• Top quark and leptonic charge asymmetries for the Tevatron and LHC
• Top Quark Forward-Backward Asymmetry and Same-Sign Top Quark Pairs
• Top quark asymmetry from a non-Abelian horizontal symmetry
• Top production at the Tevatron/LHC and nonstandard, strongly interacting spin one particles
• Application of the Principle of Maximum Conformality to the Top-Quark Forward-Backward Asymmetry at the Tevatron
• Forward-backward asymmetry in top quark production from light colored scalars in SO(10) model
• B -> D^(*) tau nu and B -> tau nu in chiral U(1)' models with flavored multi Higgs doublets
• Tevatron Asymmetry of Tops in a W',Z' Model
• A Theory for Maximal Flavor Violation
• Flipping t tbar asymmetries at the Tevatron and the LHC
• Light Colored Scalar as Messenger of Up-Quark Flavor Dynamics in Grand Unified Theories
• Search for resonant top plus jet production in ttbar + jets events with the ATLAS detector in pp collisions at sqrt(s) = 7 TeV
• Top A_FB at the Tevatron vs. charge asymmetry at the LHC in chiral U(1) flavor models with flavored Higgs doublets

Cited by in corpus (1)

• Measurement of the $\mathrm{t}\bar{\mathrm{t}}$ charge asymmetry in events with highly Lorentz-boosted top quarks in pp collisions at $\sqrt{s}$ = 13 TeV