RECORD
Probing the Colour Structure of the Top Quark Forward-Backward Asymmetry
High Energy Physics - Phenomenology · Submitted 3 Sep 2013
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim From both a fixed-order effective field theory approach and Monte Carlo studies of specific models, we find that an s-channel octet structure is preferred.
The compiled record
The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
Open the compiled record
The abstract, sentence by sentence
We point out that QCD coherence effects can help to identify the colour structure of possible new physics contributions to the anomalously large forward-backward asymmetry in top quark pair production. New physics models that yield the same inclusive asymmetry make different predictions for its dependence on the transverse momentum of the pair, if they have different colour structures. From both a fixed-order effective field theory approach and Monte Carlo studies of specific models, we find that an s-channel octet structure is preferred.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We point out that QCD coherence effects can help to identify the colour structure of possible new physics contributions to the anomalously large forward-backward asymmetry in top quark pair production. | contribution 0.95 | 0.65 | 0.22 | hedged possibility 0.79 |
| s1 | New physics models that yield the same inclusive asymmetry make different predictions for its dependence on the transverse momentum of the pair, if they have different colour structures. | background 0.60 | 0.13 | 0.08 | asserted 0.92 |
| s2 | From both a fixed-order effective field theory approach and Monte Carlo studies of specific models, we find that an s-channel octet structure is preferred. | result 0.99 | 0.96 | 0.87 | asserted 1.00 |
What was examined, and what was not
- arXiv listing abstract v2
- full text
- figures and tables
- references and citing sentences
- relations to other papers
- P abstract
- S sections
- T body sentences
- C citations
- R cross-paper relations
The paper
Original abstract
We point out that QCD coherence effects can help to identify the colour structure of possible new physics contributions to the anomalously large forward-backward asymmetry in top quark pair production. New physics models that yield the same inclusive asymmetry make different predictions for its dependence on the transverse momentum of the pair, if they have different colour structures. From both a fixed-order effective field theory approach and Monte Carlo studies of specific models, we find that an s-channel octet structure is preferred.
Human review
References
How the literature uses it
7 arXiv papers cite this in 7 sentences
Papers citing it · 5 sentences without a confident label
Compares with it 1 paper
-
The difference between NNLO and NLO corrections to the $$ asymmetry for $≥10$ follows the pattern noticed in CDF data [ref] and is, moreover, consistent with the analysis of Ref. [ref] .
NNLO QCD predictions for fully-differential top-quark pair production at the Tevatron · $$ distribution and differential asymmetry · 0.86
Cites it as background 1 paper
-
To help resolve the discrepancy, several suggestions have been made with the aim to obtain additional handles in the measurements, cf. for example Refs. [ref] .
NLO QCD corrections to W+ W- b anti-b production with leptonic decays in the light of top quark mass and asymmetry measurements · Top quark asymmetries · 0.80
What it cites · 29 sentences without a confident label
Uses the method or tool of 3 papers
-
To obtain the massive case results presented here,[Computation of the amplitudes in the massive case, both for real emission and the accompanying one-loop virtual diagrams, is reported in [ref] , but detailed results are not given.] we revert to the old-fashioned approach à la Feynman, based on squared matrix elements rather than amplitudes, and averaged/summed over initial/final state helicities.[Doing so also provides an independent check of our results for $m =0$.] We use FEYNCALC [ref] to perform the more tedious Dirac algebra.
Model independent analysis of top quark forward-backward asymmetry at the Tevatron up to $\mathcal{O}(\as^2/\Lambda^2)$ · One gluon emission · 0.92
-
Both of the above models are available in the HERWIG++ event generator [ref] .
Herwig++ Physics and Manual · Monte Carlo implementation · 1.00
-
Both of the above models are available in the HERWIG++ event generator [ref] .
Herwig++ 2.6 Release Note · Monte Carlo implementation · 1.00
Uses data or values from 1 paper
-
To study the viability of the four-fermion effective interaction ([ref]) as a model for invariant mass and transverse momentum dependence of the $tt̅$ forward-backward asymmetry observed by the CDF Collaboration [ref] , we performed scans over the coupling constants $g_L,R,g'_L,R$, for both $s$-channel colour octet and singlet interactions, taking into account the interference with the QCD contribution in the octet case, both at the Born level and in one gluon emission.
Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties · Model results · 0.98
Discussion
Know something about this paper? Leave a comment, or highlight any passage above to comment on it.