High Energy Physics - Phenomenology · arXiv:1304.0491 v2 · submitted 1 Apr 2013
Polarized Charginos (and Tops) in Stop Decays
The paper says
“In addition, we demonstrate the top polarization could have a significant impact on the selection efficiencies in direct stop samples at the LHC, while the effect from the chargino polarization is less pronounced.”
from the abstract · picked out as the main claim by a classifier
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The paper
Abstract
Current searches for direct production of scalar top quarks, or stops, in supersymmetry focus on their decays into W boson + b quark + neutralino by way of top + neutralino and bottom + chargino. While the polarization of the top quark depends on the stop mixing, the chargino turns out to be fully polarized when the bottom Yukawa coupling can be neglected relative the top Yukawa coupling. We compute the energy and angular spectra of the charged lepton in the chargino channel, which could serve as the spin-analyzer of the chargino. In addition, we demonstrate the top polarization could have a significant impact on the selection efficiencies in direct stop samples at the LHC, while the effect from the chargino polarization is less pronounced. Two observables in the laboratory frame, the opening angle between the charged lepton and the b quark and the energy of the b quark, are also proposed to optimize searches in the chargino channel versus the top channel.
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abstract compiled · 2026-09-23 · no language-model review
How the main claim is stated: hedged possibility 0.58
What the abstract itself states, as probabilities: claims first 0.04 · states limitation 0.46 · human participants 0.01 · controlled comparison 0.11 · randomized assignment 0.01 · states quantitative result 0.07 · compares with prior results 0.25 · mentions code or data availability 0.02
The abstract, sentence by sentence
This table labels the abstract only (arXiv listing abstract v2). The number is the probability the classifier gave the label.
| Sentence | Role | The authors' own work | States the main conclusion | Strength |
|---|---|---|---|---|
| Current searches for direct production of scalar top quarks, or stops, in supersymmetry focus on their decays into W boson + b quark + neutralino by way of top + neutralino and bottom + chargino. | background 1.00 | 0.04 | 0.04 | asserted 1.00 |
| While the polarization of the top quark depends on the stop mixing, the chargino turns out to be fully polarized when the bottom Yukawa coupling can be neglected relative the top Yukawa coupling. | result 0.98 | 0.63 | 0.27 | asserted 1.00 |
| We compute the energy and angular spectra of the charged lepton in the chargino channel, which could serve as the spin-analyzer of the chargino. | contribution 0.92 | 0.94 | 0.13 | hedged possibility 0.79 |
| In addition, we demonstrate the top polarization could have a significant impact on the selection efficiencies in direct stop samples at the LHC, while the effect from the chargino polarization is less pronounced. | result 0.73 | 0.85 | 0.29 | hedged possibility 0.58 |
| Two observables in the laboratory frame, the opening angle between the charged lepton and the b quark and the energy of the b quark, are also proposed to optimize searches in the chargino channel versus the top channel. | contribution 0.87 | 0.86 | 0.13 | asserted 0.74 |
What kind of paper the classifier reports this is: theoretical result 0.92 · evidence from simulation or computation 0.73
What was examined, and what was not
Sources read
- arXiv listing abstract v2
Not examined
- full text
- figures and tables
- references and citing sentences
- relations to other papers
Levels run
- P abstract
Not run
- S sections
- T body sentences
- C citations
- R cross-paper relations
How the labels were made
Compiled by classifier-1.13-20260917 via OpenRouter, question bank abstract-p1-20260923, 2026-09-23: 1 request, 4,429 input tokens, $0.0002 reported.
Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. This record as JSON
Cited by 7 Pith papers
Reviewed papers on Pith that cite this one. The full citation record
- Search for new phenomena with top quark pairs in final states with one lepton, jets, and missing transverse momentum in $pp$ collisions at $\sqrt{s}$= 13 TeV with the ATLAS detector hep-ex · Dec 2020
- Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb$^{-1}$ of $\sqrt{s}=13$ TeV $pp$ collision data with the ATLAS detector hep-ex · Nov 2017
- Scalar versus fermionic top partner interpretations of $t\bar t + E_T^{\rm miss}$ searches at the LHC hep-ph · Jul 2016
- Search for top squarks in final states with one isolated lepton, jets, and missing transverse momentum in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector hep-ex · Jun 2016
- Using Energy Peaks to Measure New Particle Masses hep-ph · Sep 2013
- A simple, yet subtle "invariance" of two-body decay kinematics hep-ph · Sep 2012
- Search for top-squark pair production in the single-lepton final state in pp collisions at sqrt(s) = 8 TeV hep-ex · Aug 2013
How the literature uses it
19 arXiv papers cite this in 24 sentences
Papers citing it · 18 sentences without a confident label
Uses its method or tool 1 paper
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Since the decay products in the generated event samples did not preserve spin information, a polarisation reweighting was applied following Refs. [ref] .
Search for new phenomena with top quark pairs in final states with one lepton, jets, and missing transverse momentum in $pp$ collisions at $\sqrt{s}$= 13 TeV with the ATLAS detector · Simulated event samples · 0.99
Cites it as background 5 papers
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Light stops have been widely studied in the recent literature by both the theoretical [ref] and experimental [ref] communities.
Light stop squarks and b-tagging · Introduction · 0.99
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Light stops have been subject to intense recent studies both in the theory [ref] and experimental [ref] communities.
Spot the stop with a b-tag · Introduction · 0.99
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Studies of stop searches have been performed by many groups in various (fully hadronic, single-lepton, di-lepton) channels in recent years [ref] .
A Toolkit of the Stop Search via the Chargino Decay · Introduction · 0.97
What it cites · 7 sentences without a confident label
Uses the method or tool of 1 paper
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We generate 20,000 parton level events using Madgraph 5 [ref] for each of the benchmarks.
MadGraph 5 : Going Beyond · Lab Frame Observables at the LHC · 1.00
Uses data or values from 1 paper
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The cross-sections for stop pair production at 8 (13) TeV LHC range from 0.025 (0.17) pb for $m_t̃_1=600$ GeV to 0.0029 (0.028) pb for $m_t̃_1=800$ GeV [ref] .
Supersymmetry production cross sections in pp collisions at sqrt{s} = 7 TeV · Lab Frame Observables at the LHC · 0.97
Compares with 1 paper
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|M|^2 = (g_eff^(t))^2 (p_χ^0·p_t + m_t m_χ^0 sin2θ^(t)_eff - m_t cos2θ^(t)_eff p_χ^0·s ) = (g_eff^(t))^2 m_t (E_χ^0 + m_χ^0 sin2θ^(t)_eff + cos2θ^(t)_eff |p⃗_χ^0| |s⃗| cosθ_χ̃^0) , The first line in Eq. ([ref]) is the Lorentz invariant expression, while the second line is the result in the rest frame of the top quark and agrees with the existing result in Ref. [ref] .
Polarized Tops from Stop Decays at the LHC · $t̃_1→χ̃^+_0 b ( t χ̃^0_1)$ · 0.98
Cites as background 9 papers
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Although the possibility of polarized tops in stop decays has long been studied in the literature [ref] , the corresponding issue of chargino polarization seems to have received little attention [ref] .
Polarized tops from new physics: signals and observables · Introduction · 0.88
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Although the possibility of polarized tops in stop decays has long been studied in the literature [ref] , the corresponding issue of chargino polarization seems to have received little attention [ref] .
Polarized Tops from Stop Decays at the LHC · Introduction · 0.88
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Although the possibility of polarized tops in stop decays has long been studied in the literature [ref] , the corresponding issue of chargino polarization seems to have received little attention [ref] .
Measuring Top Quark Polarization in Top Pair plus Missing Energy Events · Introduction · 0.88
Challenges and discussion
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