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Top-antitop resonance searches beyond 1 TeV
High Energy Physics - Phenomenology · Submitted 21 Dec 2012
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We observe that $\beta$ is replaced by $\theta$ as a suitable discriminating variable of quark-annihilation processes for invariant masses above 1 TeV.
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The abstract, sentence by sentence
We perform a general parton level analysis for the search of heavy resonant states in the production of top-antitop pairs at the LHC with an integrated luminosity of 30 fb^-1. We assume the existence of resonances that only couple to quarks and propose kinematic cuts in order to increase the amount of events produced through quark-annihilation. We study the interplay between different variables and their impact on the purity of the selected sample. We make focus on the longitudinal ($\beta$) and transverse ($p_T$) momentum of the top-antitop pair, and the scattering angle ($\theta$) in the center of mass reference frame. We observe that $\beta$ is replaced by $\theta$ as a suitable discriminating variable of quark-annihilation processes for invariant masses above 1 TeV. Finally, we illustrate the analysis with a gluon resonance of 1.5 TeV and show the improvement in the sensitivity of the signal when cuts on $\theta$ are imposed.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We perform a general parton level analysis for the search of heavy resonant states in the production of top-antitop pairs at the LHC with an integrated luminosity of 30 fb^-1. | contribution 0.89 | 0.94 | 0.04 | asserted 0.95 |
| s1 | We assume the existence of resonances that only couple to quarks and propose kinematic cuts in order to increase the amount of events produced through quark-annihilation. | method 0.91 | 0.71 | 0.04 | asserted 0.93 |
| s2 | We study the interplay between different variables and their impact on the purity of the selected sample. | method 0.54 | 0.89 | 0.03 | asserted 0.59 |
| s3 | We make focus on the longitudinal ($\beta$) and transverse ($p_T$) momentum of the top-antitop pair, and the scattering angle ($\theta$) in the center of mass reference frame. | method 0.79 | 0.69 | 0.04 | asserted 0.90 |
| s4 | We observe that $\beta$ is replaced by $\theta$ as a suitable discriminating variable of quark-annihilation processes for invariant masses above 1 TeV. | result 0.99 | 0.94 | 0.68 | asserted 1.00 |
| s5 | Finally, we illustrate the analysis with a gluon resonance of 1.5 TeV and show the improvement in the sensitivity of the signal when cuts on $\theta$ are imposed. | result 0.66 | 0.94 | 0.35 | asserted 1.00 |
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The paper
Original abstract
We perform a general parton level analysis for the search of heavy resonant states in the production of top-antitop pairs at the LHC with an integrated luminosity of 30 fb^-1. We assume the existence of resonances that only couple to quarks and propose kinematic cuts in order to increase the amount of events produced through quark-annihilation. We study the interplay between different variables and their impact on the purity of the selected sample. We make focus on the longitudinal ($\beta$) and transverse ($p_T$) momentum of the top-antitop pair, and the scattering angle ($\theta$) in the center of mass reference frame. We observe that $\beta$ is replaced by $\theta$ as a suitable discriminating variable of quark-annihilation processes for invariant masses above 1 TeV. Finally, we illustrate the analysis with a gluon resonance of 1.5 TeV and show the improvement in the sensitivity of the signal when cuts on $\theta$ are imposed.
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What this paper does with the arXiv papers it cites
What it cites · 21 sentences without a confident label
Uses the method or tool of 3 papers
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We have simulated SM inclusive production at the LHC@8TeV up to one extra jet with MadGraph5 [ref] and then showered it with Pythia [ref] .
MadGraph/MadEvent v4: The New Web Generation · Using $β$, $p_T$ and $θ$ to enhance the sensitivity to NP resonances · 1.00
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We have simulated SM inclusive production at the LHC@8TeV up to one extra jet with MadGraph5 [ref] and then showered it with Pythia [ref] .
PYTHIA 6.4 Physics and Manual · Using $β$, $p_T$ and $θ$ to enhance the sensitivity to NP resonances · 1.00
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To avoid double counting, we have matched the matrix element to the parton shower through the MLM scheme [ref] implemented in MadGraph5.
Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions · Using $β$, $p_T$ and $θ$ to enhance the sensitivity to NP resonances · 1.00
Uses data or values from 1 paper
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With the same computational tools used in the previous section, we have simulated a $30$ fb$^-1$ sample of $pp→tt̅$ and assumed a reference selection efficiency of $6 %$ [ref] .
Inclusive and differential measurements of the t t-bar charge asymmetry in proton-proton collisions at sqrt(s) = 7 TeV · Application of the studied cuts in a specific example · 0.99
Cites as background 10 papers
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The search for kinematic cuts that increase in a given $tt̅$ sample has been studied in the last years [ref] mainly to increase the sensitivity in the top charge-asymmetry at the LHC and very few in the $m_tt̅$-spectrum [ref] .
Enhancing the sensitivity to New Physics in the top-antitop invariant mass distribution · Introduction · 0.93
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The search for kinematic cuts that increase in a given $tt̅$ sample has been studied in the last years [ref] mainly to increase the sensitivity in the top charge-asymmetry at the LHC and very few in the $m_tt̅$-spectrum [ref] .
One-side Forward-backward Asymmetry in Top Quark Pair Production at CERN Large Hadron Collider · Introduction · 0.93
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The search for kinematic cuts that increase in a given $tt̅$ sample has been studied in the last years [ref] mainly to increase the sensitivity in the top charge-asymmetry at the LHC and very few in the $m_tt̅$-spectrum [ref] .
$A^t_{FB}$ Meets LHC · Introduction · 0.93
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