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Demystifying the compressed top squark region with kinematic variables
High Energy Physics - Phenomenology · Submitted 10 Dec 2016
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim With the new strategic approach the current limit can be extended to a phase-space region that was not explored before.
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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.
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The abstract, sentence by sentence
The ongoing perplexing scenario with no hints of new physics at the Large Hadron Collider can be elucidated amicably if the exotic particle spectrum in many of the well-motivated theoretical models possesses degenerate mass. We investigate the usefulness of different kinematic variables sensitive to the compressed mass region, and propose a search strategy considering a phenomenological supersymmetric scenario where the top squark undergoes a four-body decay due to its extremely narrow mass difference with the lightest supersymmetric particle. Considering a challenging but relatively clean dileptonic decay channel, we demonstrate that one can effectively restrain the significant background from the top quark, which provides a complementary approach to the present CMS analysis. With the new strategic approach the current limit can be extended to a phase-space region that was not explored before.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The ongoing perplexing scenario with no hints of new physics at the Large Hadron Collider can be elucidated amicably if the exotic particle spectrum in many of the well-motivated theoretical models possesses degenerate mass. | background 0.98 | 0.06 | 0.16 | hedged possibility 0.80 |
| s1 | We investigate the usefulness of different kinematic variables sensitive to the compressed mass region, and propose a search strategy considering a phenomenological supersymmetric scenario where the top squark undergoes a four-body decay due to its extremely narrow mass difference with the lightest supersymmetric particle. | contribution 0.98 | 0.92 | 0.15 | asserted 0.94 |
| s2 | Considering a challenging but relatively clean dileptonic decay channel, we demonstrate that one can effectively restrain the significant background from the top quark, which provides a complementary approach to the present CMS analysis. | result 0.36 | 0.88 | 0.21 | asserted 0.88 |
| s3 | With the new strategic approach the current limit can be extended to a phase-space region that was not explored before. | result 0.91 | 0.77 | 0.48 | asserted 0.93 |
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The paper
Original abstract
The ongoing perplexing scenario with no hints of new physics at the Large Hadron Collider can be elucidated amicably if the exotic particle spectrum in many of the well-motivated theoretical models possesses degenerate mass. We investigate the usefulness of different kinematic variables sensitive to the compressed mass region, and propose a search strategy considering a phenomenological supersymmetric scenario where the top squark undergoes a four-body decay due to its extremely narrow mass difference with the lightest supersymmetric particle. Considering a challenging but relatively clean dileptonic decay channel, we demonstrate that one can effectively restrain the significant background from the top quark, which provides a complementary approach to the present CMS analysis. With the new strategic approach the current limit can be extended to a phase-space region that was not explored before.
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References
How the literature uses it
7 arXiv papers cite this in 7 sentences
Papers citing it · 3 sentences without a confident label
Cites it as background 4 papers
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There have been many phenomenological studies to constrain light or compressed stops, e.g. [ref] .
On the ATLAS Top Mass Measurements and the Potential for Stealth Stop Contamination · Introduction · 0.95
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For example, for highly compressed spectra ($-< m_W$), the searches rely on 4-body decays ($→bff'$) [ref] or flavor-changing decays ($→cW$) [ref] , or even monojet [ref] .
Constraining the Compressed Top Squark and Chargino along the W Corridor · Introduction · 0.88
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For the difficult cases of very compressed spectra, $≲m_t+$, various search channels and kinematic variables have been proposed [ref] and new techniques have been adopted in recent experimental searches [ref] .
Compressed Stop Searches with Two Leptons and Two b-jets · Introduction · 0.95
What it cites · 21 sentences without a confident label
Uses the method or tool of 6 papers
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We simulate both the signal and the background events using $$ [ref] and those events were passed to [ref] for multiparton interaction, hadronization, and parton showering.
A Brief Introduction to PYTHIA 8.1 · Event simulation and basic cuts · 1.00
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We simulate both the signal and the background events using $$ [ref] and those events were passed to [ref] for multiparton interaction, hadronization, and parton showering.
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations · Event simulation and basic cuts · 1.00
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We simulate both the signal and the background events using $$ [ref] and those events were passed to [ref] for multiparton interaction, hadronization, and parton showering.
PYTHIA 6.4 Physics and Manual · Event simulation and basic cuts · 1.00
Uses data or values from 4 papers
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A conventional monojet+$$ search with 13 TeV data provide limit on top squark mass of 323 GeV as reported by the ATLAS collaboration [ref] .
Search for new phenomena in final states with an energetic jet and large missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV using the ATLAS detector · Introduction · 0.86
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For all our analysis we have used the NLO+NLL top squark cross sections given by the LHC SUSY Cross Section Working Group [ref] .
Squark and gluino production cross sections in pp collisions at $\sqrt{s}$ = 13, 14, 33 and 100 TeV · Event simulation and basic cuts · 0.97
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For $b$ tagging we have used the combined secondary vertex algorithm at the medium operating point(CSVM), which has b-tagging efficiency of approximately 70% with light-parton misidentification probability of only 1.5% [ref] .
Identification of b-quark jets with the CMS experiment · Event simulation and basic cuts · 0.90
Compares with 1 paper
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Regardless of the smaller branching ratio in the leptonic channel, proposed variables are capable of delivering limits comparable to that of hadronic modes [ref] .
Opening up the compressed region of stop searches at 13 TeV LHC · Results · 0.80
Cites as background 30 papers
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Several novel methods were proposed to search for the compressed region at the collider [ref] .
Light Stop Searches at the LHC in Events with One Hard Photon or Jet and Missing Energy · Introduction · 0.97
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Several novel methods were proposed to search for the compressed region at the collider [ref] .
Light Stop Searches at the LHC in Events with two b-Jets and Missing Energy · Introduction · 0.97
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Several novel methods were proposed to search for the compressed region at the collider [ref] .
Light Stop NLSPs at the Tevatron and LHC · Introduction · 0.97
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