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J.; Rodrigo, T.; Rolli, S.; Romano, J.; Rosenson, L.; Roser, R.; Saab, T.; Sakumoto, W. K.; Saltzberg, D.; Sansoni, A.; Santi, L.; Sato, H.; Schlabach, P.; Schmidt, E. E.; Schmidt, M. P.; Scribano, A.; Segler, S.; Seidel, S. C.; Seiya, Y.; Semeria, F.; Sganos, G.; Shapiro, M.; Shaw, N. M.; Shen, Qing; Shepard, P. F.; Shimojima, M.; Shochet, M.; Siegrist, J.; Sill, A.; Sinervo, P.; Singh, P.; Skarha, J.; Sliwa, K.; Snider, F. D.; Song, T.; Spalding, J.; Speer, T.; Sphicas, P.; Spinella, F.; Spiropulu, M.; Spiegel, L.; Stančo, L.; Steele, J.; Stefanini, A.; Strahl, K.; Strait, J.; Ströhmer, R.; Stuart, D.; Sullivan, G. W.; Sumorok, K.; Suzuki, Junya; Takada, Tomoya; Takahashi, T.; Takano, T.; Takikawa, K.; Tamura, N.; Tannenbaum, B.; Tartarelli, G. F.; Taylor, W.; Teng, P. K.; Teramoto, Y.; Tether, S.; Theriot, D.; Thomas, T. L.; Thun, R. 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doi:10.1103/physrevlett.80.2525

Cited by 130 publications

(54 citation statements)

References 13 publications

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“…It is usually expected that new physics, and in particular the mass generation mechanism, will show up first in the third family and thus in the top quark, and large hadron colliders are the best place to perform a precise measurement of these couplings. The present 95% C. L. limits on the top branching ratios at Tevatron are Br(t → Zq) ≤ 0.33, Br(t → γq) ≤ 0.032 [3], Br(t → gq) ≤ 0.15 [6], which imply…”

mentioning

confidence: 68%

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Zt and γt production via top flavour-changing neutral couplings at the Fermilab Tevatron

1999

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Associated single top production with a Z boson or a photon at large hadron colliders provides a precise determination of top flavour-changing neutral couplings. The best way to measure these couplings with the up quark at Tevatron is to search for events with three jets and missing energy or events with a photon, a charged lepton, a jet and missing energy. Other decay channels are also discussed.

show abstract

mentioning

confidence: 68%

“…A detailed discussion of all these decay channels at LHC will be presented elsewhere [2]. Throughout this Letter we consider that the top quark decays predominantly into W b [3], and we sum t andt production.…”

mentioning

confidence: 99%

Zt and γt production via top flavour-changing neutral couplings at the Fermilab Tevatron

1999

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“…Thus searching for top quark FCNC is a potentially powerful probe of new physics. The CDF and DØ collaborations have reported interesting bounds on the FCNC top quark decays [334][335][336]. The SM expectations for such top quark FCNC processes are far below the detectable level but the MSSM can enhance them by several orders of magnitude to make them potentially accessible at future collider experiments [337][338][339].…”

Section: Introductionmentioning

confidence: 99%

CMS Physics Technical Design Report, Volume II: Physics Performance

Bayatian¹,

Chatrchyan²,

Hmayakyan³

et al. 2007

J. Phys. G: Nucl. Part. Phys.

717

161

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CMS is a general purpose experiment, designed to study the physics of pp collisions at 14 TeV at the Large Hadron Collider (LHC). It currently involves more than 2000 physicists from more than 150 institutes and 37 countries. The LHC will provide extraordinary opportunities for particle physics based on its unprecedented collision energy and luminosity when it begins operation in 2007.The principal aim of this report is to present the strategy of CMS to explore the rich physics programme offered by the LHC. This volume demonstrates the physics capability of the CMS experiment. The prime goals of CMS are to explore physics at the TeV scale and to study the mechanism of electroweak symmetry breaking-through the discovery of the Higgs particle or otherwise. To carry out this task, CMS must be prepared to search for new particles, such as the Higgs boson or supersymmetric partners of the Standard Model particles, from the start-up of the LHC since new physics at the TeV scale may manifest itself with modest data samples of the order of a few fb −1 or less. The analysis tools that have been developed are applied to study in great detail and with all the methodology of performing an analysis on CMS data specific benchmark processes upon which to gauge the performance of CMS. These processes cover several Higgs boson decay channels, the production and decay of new particles such as Z and supersymmetric particles, B s production and processes in heavy ion collisions. The simulation of these benchmark processes includes subtle effects such as possible detector miscalibration and misalignment. Besides these benchmark processes, the physics reach of CMS is studied for a large number of signatures arising in the Standard Model and also in theories beyond the Standard Model for integrated luminosities ranging from 1 fb −1 to 30 fb −1 . The Standard Model processes include QCD, B-physics, diffraction, detailed studies of the top quark properties, and electroweak physics topics such as the W and Z 0 boson properties. The production and decay of the Higgs particle is studied for many observable decays, and the precision with which the Higgs boson properties can be derived is determined. About ten different supersymmetry benchmark points are analysed using full simulation. The CMS discovery reach is evaluated in the SUSY parameter space covering a large variety of decay signatures.

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“…4The current 95 % CL observed limits on the a BR vs BR and b BR vs BR planes are shown. The full lines represent the results from the ATLAS [25], CDF [16, 21] CMS [19, 27], DØ [17], H1 [20], LEP (combined results of the ALEPH, DELPHI, L3 and OPAL collaborations) [10–14] and ZEUS [15] collaborations. The ATLAS lines correspond to the limit on BR() set in this paper…”

Section: Resultsmentioning

confidence: 99%

Search for flavour-changing neutral current top-quark decays to $$\varvec{qZ}$$ q Z in $$\varvec{pp}$$ p p collision data collected with the ATLAS detector at $$\varvec{\sqrt{s}=8}$$ s = 8 TeV

Aad¹,

Abbott²,

Abdallah³

et al. 2016

Eur. Phys. J. C

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A search for the flavour-changing neutral-current decay is presented. Data collected by the ATLAS detector during 2012 from proton–proton collisions at the Large Hadron Collider at a centre-of-mass energy of TeV, corresponding to an integrated luminosity of 20.3 fb, are analysed. Top-quark pair-production events with one top quark decaying through the () channel and the other through the dominant Standard Model mode are considered as signal. Only the decays of the Z boson to charged leptons and leptonic W boson decays are used. No evidence for a signal is found and an observed (expected) upper limit on the branching ratio of () is set at the 95 % confidence level

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Search for Flavor-Changing Neutral Current Decays of the Top Quark inpp¯Collisions ats

Cited by 130 publications

References 13 publications

Zt and γt production via top flavour-changing neutral couplings at the Fermilab Tevatron

Zt and γt production via top flavour-changing neutral couplings at the Fermilab Tevatron

CMS Physics Technical Design Report, Volume II: Physics Performance

Search for flavour-changing neutral current top-quark decays to $$\varvec{qZ}$$ q Z in $$\varvec{pp}$$ p p collision data collected with the ATLAS detector at $$\varvec{\sqrt{s}=8}$$ s = 8 TeV

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