Searches for direct pair production of supersymmetric top and supersymmetric bottom quarks in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math>collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>1.96</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:m

Aaltonen, T.; Abulencia, A.; Adelman, J.; Affolder, A. A.; Akimoto, T.; Albrow, M.; Amerio, S.; Amidei, D.; Anastassov, A.; Anikeev, K.; Annovi, A.; Antos̆, J.; Aoki, M.; Apollinari, G.; Arisawa, T.; Artikov, A.; Ashmanskas, W.; Attal, A.; Aurisano, A.; Azfar, F.; Azzi-Bacchetta, P.; Azzurri, P.; Bacchetta, N.; Badgett, W.; Barbaro-Galtieri, A.; Barnes, V. E.; Barnett, B. A.; Baroiant, S.; Bartsch, V.; Bauer, G.; Beauchemin, P. H.; Bedeschi, F.; Behari, S.; Bellettini, G.; Bellinger, J.; Belloni, A.; Benjamin, D.; Beretvas, A.; Beringer, J.; Berry, T.; Bhatti, A.; Binkley, M.; Bisello, D.; Bizjak, I.; Blair, R. E.; Blocker, C.; Blumenfeld, B.; Bocci, A.; Bodek, A.; Boisvert, V.; Bolla, G.; Bolshov, A.; Bortoletto, D.; Boudreau, J.; Boveia, A.; Brau, B.; Brigliadori, L.; Bromberg, C.; Brubaker, E.; Budagov, J.; Budd, H. S.; Budd, S.; Burkett, K.; Busetto, G.; Bussey, P.; Buzatu, A.; Byrum, K. 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doi:10.1103/physrevd.76.072010

Cited by 29 publications

(9 citation statements)

References 48 publications

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“…The production cross section depends mostly on the mass of the top partner and has minimal dependence on other SUSY parameters [10][11][12]. The LHC enables searches for directtt Ã production at higher mass scales than previous accelerators [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. The viability of SUSY as a scenario to stabilize the Higgs potential and to be consistent with electroweak naturalness [28,29] is tested by the search fort below the TeV scale.…”

mentioning

confidence: 99%

Search for a Supersymmetric Partner to the Top Quark in Final States with Jets and Missing Transverse Momentum ats=7 TeVwith the ATLAS Detector

Aad¹,

Abajyan²,

Abbott³

et al. 2012

Phys. Rev. Lett.

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A search for direct pair production of supersymmetric top squarks (t 1 ) is presented, assuming thet 1 decays into a top quark and the lightest supersymmetric particle, 0 1 , and that both top quarks decay to purely hadronic final states. A total of 16 (4) The standard model (SM) is a successful but incomplete theory of particle interactions. Supersymmetry (SUSY) [1][2][3][4][5][6][7][8][9] provides an elegant cancellation of the quadratic mass divergences that would accompany a SM Higgs boson by introducing supersymmetric partners of all SM particles, such as a scalar partner of the top quark (t). Like t " t, directtt Ã is produced primarily through gluon fusion at the Large Hadron Collider (LHC). The production cross section depends mostly on the mass of the top partner and has minimal dependence on other SUSY parameters [10][11][12]. The LHC enables searches for directtt Ã production at higher mass scales than previous accelerators [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. The viability of SUSY as a scenario to stabilize the Higgs potential and to be consistent with electroweak naturalness [28,29] is tested by the search fort below the TeV scale.In this Letter, we present a search for directtt Ã production assumingt ! t 0 1 ! bW 0 1 , wheret 1 is the lightestt eigenstate and 0 1 represents the lightest supersymmetric particle (LSP) in R-parity conserving models [30][31][32][33][34]. We target events where both W bosons decay hadronically, yielding a final state with six high transverse momentum (p T ) jets from the all-hadronic t " t final state and large missing transverse momentum (E miss T ) from the LSPs. The kinematics of both top quarks can therefore be fully specified by the visible decay products. Additionally, SM backgrounds from all-hadronic t " t are suppressed as there is no intrinsic E miss T except from semileptonic c-and b-quark decays. The dominant background consists of t " t events that contain a W ! ' decay where the lepton ('), often of flavor, is either lost or misidentified as a jet. These events also have large E miss T from the neutrino (). The data were acquired during 2011 in LHC pp collisions at a center-of-mass energy of 7 TeV with the ATLAS detector [35], which consists of tracking detectors surrounded by a 2 T superconducting solenoid, calorimeters, and a muon spectrometer in a toroidal magnetic field. The high-granularity calorimeter system, with acceptance covering jj < 4:9 [36], is composed of liquid argon with lead, copper, or tungsten absorbers and scintillator tiles with steel absorbers. This data set, composed of events with a high-p T jet and large E miss T as selected by the trigger system, corresponds to an integrated luminosity of 4:7 fb À1 with a relative uncertainty of 3.9% [37][38][39].Jets are constructed from three-dimensional clusters of calorimeter cells using the anti-k t algorithm with a distance parameter of 0.4 [39,40]. Jet energies are corrected [41] for losses in material in front of the active calorimeter layers, detector inhomogeneit...

show abstract

mentioning

confidence: 99%

Search for a Supersymmetric Partner to the Top Quark in Final States with Jets and Missing Transverse Momentum ats=7 TeVwith the ATLAS Detector

Aad¹,

Abajyan²,

Abbott³

et al. 2012

Phys. Rev. Lett.

Self Cite

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“…limit was obtained in the mass parameter plane of the model. Figure 7.15 shows the excluded region in the stopneutralino mass plane of the analysis, compared with results from previous analyses [107,106].…”

Section: Resultsmentioning

confidence: 97%

“…set to 100%. The stop mass is varied between 90 GeV/c 2 to 195 GeV/c 2 and the neutralino mass from 60 GeV/c 2 to 125 GeV/c 2 .The generated signal points are showed in the figure 6.2 with the previous limit obtained by CDF[106], DØ[107], and LEP[108].…”

mentioning

confidence: 97%

Search for Third Generation Squarks in the Missing Transverse Energy plus Jet Sample at CDF Run II

Marono

2010

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“…In Fig. 16 the experimental 95% exclusion regions in the stop-neutralino mass plane are shown as presented by [196]. We see that for a light neutralino, mχ < 45 GeV, stop masses below 120 GeV are excluded.…”

Section: Baryogenesismentioning

confidence: 89%

The Next-to-Minimal Supersymmetric Extension of the Standard Model Reviewed

Maniatis

2010

Int. J. Mod. Phys. A

413

390

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The next-to-minimal supersymmetric extension of the Standard Model (NMSSM) is one of the most favored supersymmetric models. After an introduction to the model, the Higgs sector and the neutralino sector are discussed in detail. Theoretical, experimental, and cosmological constraints are studied. Eventually, the Higgs potential is investigated in the approach of bilinear functions. Emphasis is placed on aspects which are different from the minimal supersymmetric extension.

show abstract

Searches for direct pair production of supersymmetric top and supersymmetric bottom quarks inpp¯collisions ats=1.96 TeV

Cited by 29 publications

References 48 publications

Search for a Supersymmetric Partner to the Top Quark in Final States with Jets and Missing Transverse Momentum ats=7 TeVwith the ATLAS Detector

Search for a Supersymmetric Partner to the Top Quark in Final States with Jets and Missing Transverse Momentum ats=7 TeVwith the ATLAS Detector

Search for Third Generation Squarks in the Missing Transverse Energy plus Jet Sample at CDF Run II

The Next-to-Minimal Supersymmetric Extension of the Standard Model Reviewed

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