Electroweak Sudakov Corrections and the Top Quark Forward-Backward Asymmetry

Aneesh V. Manohar; Michael Trott

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Electroweak Sudakov Corrections and the Top Quark Forward-Backward Asymmetry

Aneesh V. Manohar, Michael Trott

High Energy Physics - Phenomenology · Submitted 18 Jan 2012

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim The Standard Model (SM) prediction of the top quark forward backward asymmetry is shown to be slightly enhanced by a correction factor of 1.05 due to electroweak Sudakov (EWS) logarithms of the form (\alpha/sin^2 \theta_W)^n log^{m< 2n} (s/M_{W,Z}^2).

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What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.09 · human participants 0.01 · controlled comparison 0.21 · randomized assignment 0.01 · states quantitative result 0.98 · compares with prior results 0.56 · mentions code or data availability 0.02.

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The Standard Model (SM) prediction of the top quark forward backward asymmetry is shown to be slightly enhanced by a correction factor of 1.05 due to electroweak Sudakov (EWS) logarithms of the form (\alpha/sin^2 \theta_W)^n log^{m< 2n} (s/M_{W,Z}^2). The EWS effect on the dijet and t \bar{t} invariant mass spectra is significant, reducing the SM prediction by ~20, 10 % respectively for the highest invariant masses measured at the LHC, and changing the shape of the high-mass tail of the spectrum. These corrections significantly affect measurements of the top quark invariant mass spectrum and the search for an excess of events related to the top quark forward-backward asymmetry.

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#	sentence	role	the authors' own work	states the main conclusion	strength
s0	The Standard Model (SM) prediction of the top quark forward backward asymmetry is shown to be slightly enhanced by a correction factor of 1.05 due to electroweak Sudakov (EWS) logarithms of the form (\alpha/sin^2 \theta_W)^n log^{m< 2n} (s/M_{W,Z}^2).	result 0.99	0.77	0.46	asserted 1.00
s1	The EWS effect on the dijet and t \bar{t} invariant mass spectra is significant, reducing the SM prediction by ~20, 10 % respectively for the highest invariant masses measured at the LHC, and changing the shape of the high-mass tail of the spectrum.	result 1.00	0.76	0.22	asserted 1.00
s2	These corrections significantly affect measurements of the top quark invariant mass spectrum and the search for an excess of events related to the top quark forward-backward asymmetry.	interpretation 0.96	0.58	0.31	asserted 1.00

What kind of paper the classifier reports this is: theoretical result 0.99 · evidence from proof or derivation 0.55.

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The paper

Original abstract

The Standard Model (SM) prediction of the top quark forward backward asymmetry is shown to be slightly enhanced by a correction factor of 1.05 due to electroweak Sudakov (EWS) logarithms of the form (\alpha/sin^2 \theta_W)^n log^{m< 2n} (s/M_{W,Z}^2). The EWS effect on the dijet and t \bar{t} invariant mass spectra is significant, reducing the SM prediction by ~20, 10 % respectively for the highest invariant masses measured at the LHC, and changing the shape of the high-mass tail of the spectrum. These corrections significantly affect measurements of the top quark invariant mass spectrum and the search for an excess of events related to the top quark forward-backward asymmetry.

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References

Forward citations

Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

Resolving the Tevatron Top Quark Forward-Backward Asymmetry Puzzle: Fully Differential Next-to-Next-to-Leading-Order Calculation
hep-ph 2014-11 accept novelty 8.0 of 10

The full NNLO QCD correction to the Tevatron top quark forward-backward asymmetry is large and positive, raising the Standard Model prediction to 0.095 and matching the D0 measurement.
Probing the SM with Dijets at the LHC
hep-ph 2012-01 conditional novelty 6.0 of 10

Dijet angular distributions from the LHC constrain all ten dimension-six four-quark operators at the 1 to 5 TeV scale, bounding quark and gluon compositeness and extra gauge bosons.
Top-pair production at the LHC through NNLO QCD and NLO EW
hep-ph 2017-05 accept novelty 5.0 of 10

The first combined NNLO QCD plus NLO electroweak predictions for LHC top-pair differential distributions, showing electroweak effects reach 25% in the boosted top transverse-momentum tail and that the photon PDF impac...
Dynamical scales for multi-TeV top-pair production at the LHC
hep-ph 2016-06 conditional novelty 5.0 of 10

Choosing scales that minimize perturbative corrections (half the transverse mass for transverse-momentum distributions, one quarter of the scalar sum of transverse masses for all others) yields stable NNLO top-pair pr...
The impact of the photon PDF and electroweak corrections on $t \bar t$ distributions
hep-ph 2016-06 conditional novelty 5.0 of 10

Photon-initiated channels in top-pair production can cancel Sudakov electroweak suppression at high scales and in forward rapidities, but only if the photon PDF is as large as NNPDF2.3QED assumes, not as CT14QED assumes.

Show 2 more citing papers

Measurements of top-quark pair differential cross-sections in the lepton+jets channel in $pp$ collisions at $\sqrt{s}=8$ TeV using the ATLAS detector
hep-ex 2015-11 accept novelty 5.0 of 10

Normalized top-quark pair differential cross-sections at 8 TeV, unfolded to particle and parton level, show NLO generators overpredict high top-quark transverse momentum while a full NNLO calculation agrees with the data.
Search for resonances decaying into top-quark pairs using fully hadronic decays in pp collisions with ATLAS at sqrt(s) = 7 TeV
hep-ex 2012-11 conditional novelty 5.0 of 10

No resonant top-pair excess appears in 4.7 fb^-1 of 7 TeV ATLAS data, excluding Kaluza-Klein gluons from 0.70 to 1.62 TeV and Z' bosons in two windows at 95% credibility.

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37 arXiv papers cite this in 46 sentences

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Papers citing it · 32 sentences without a confident label

Uses its data or values 3 papers

The NLO QCD predictions, including leading electroweak (EW) contributions [ref] , are [ref] A^SM_FB = 0.088 ±0.006 , when using the LO total cross section in the denominator of the asymmetry.

Forward Tevatron Tops and Backward LHC Tops with Associates · Introduction · 0.85
For the $m_$ dependence, CDF [ref] finds, after unfolding: [equation] The asymmetry in the high-$m_$ bin is particularly striking given that the SM prediction, including EW corrections [ref] , is much lower: ()^SM ≡ 0.129^+0.008_-0.006 .

Data driving the top quark forward--backward asymmetry with a lepton-based handle · Introduction · 0.98
Finally, it has been recently shown in [ref] that electroweak corrections reduce the SM prediction of $F_χ$ by a $∼2 %$ for large invariant masses $m_jj ∼2$.

Probing the SM with Dijets at the LHC · Bounds · 0.89

Cites it as background 11 papers

While weak [ref] , QED [ref] and EW (weak+QED) [ref] corrections to $$ production at hadron colliders have been known for quite some time and the effect of Sudakov logarithms has been quantified and studied, the impact of photon-induced subprocesses has been addressed only in [ref] for only the $gγ$ channel at LO and using the only PDF set with the photon distribution available at that time, i.e., MRST2004QED [ref] .

The impact of the photon PDF and electroweak corrections on $t \bar t$ distributions · Introduction · 0.93
Indeed, the $$-related publications by the CDF [ref] and DØ [ref] collaborations have initiated major research activity both in explaining the discrepancy with beyond the Standard Model (BSM) physics (see e.g. Refs. [ref] ) and in estimating $$ within the Standard Model [ref] (see Ref. [ref] for an in-depth review).

Resolving the Tevatron Top Quark Forward-Backward Asymmetry Puzzle: Fully Differential Next-to-Next-to-Leading-Order Calculation · Introduction · 0.82
Theory predictions for top-quark cross sections and differential distributions in $tt̅$ production have been computed at NLO $O(α_s^3)$ in Refs. [ref] , and NNLO at $O(α_s^4)$ in Refs. [ref] in QCD, while EW corrections to this process were studied in Refs. [ref] .

Progress in top-quark pair production cross section calculations and impact on parton distribution functions of the proton · Top-quark cross sections and distributions at aN$^3$LO · 0.99

What it cites · 11 sentences without a confident label

Compares with 1 paper

We find $A_FB^t t̅ = 7.4 %$ and $A_FB^t t̅(m_tt̅<450) = 5.3 %$, $A_FB^tt̅(m_tt̅>450) = 10.7 %$ for the purely QCD asymmetry, in good agreement with other determinations [ref] .

Charge asymmetries of top quarks at hadron colliders revisited · Introduction · 0.99

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