Top flavour-changing neutral coupling signals at a linear collider

Aguilar-Saavedra, J. A.

doi:10.1016/s0370-2693(01)00162-9

Cited by 45 publications

(32 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the LHC the production proceeds through the six parton-level processes shown in Eqs. (1)(2)(3)(4)(5)(6), among which only gg → tc has been extensively studied in the MSSM [11,12]. In calculating the cross section for each channel, we also include the rate for its charge conjugate channel.…”

Section: The Decaymentioning

confidence: 99%

Supersymmetry-induced flavor-changing neutral-current top-quark processes at the CERN Large Hadron Collider

et al. 2007

View full text Add to dashboard Cite

We systematically calculate various flavor-changing neutral-current top-quark processes induced by supersymmetry at the Large Hadron Collider, which include five decay modes and six production channels. To reveal the characteristics of these processes, we first compare the dependence of the rates for these channels on the relevant supersymmetric parameters, then we scan the whole parameter space to find their maximal rates, including all the direct and indirect current experimental constraints on the scharm-stop flavor mixings. We find that, under all these constraints, only a few channels, through cg → t at parton-level and t → ch, may be observable at the Large Hadron Collider.

show abstract

Section: The Decaymentioning

confidence: 99%

Supersymmetry-induced flavor-changing neutral-current top-quark processes at the CERN Large Hadron Collider

et al. 2007

View full text Add to dashboard Cite

show abstract

“…This results in a negligible branching ratio Br(t → Zc) ∼ 10 −14 within the SM. In Model I the FCN coupling X ct can be sizeable [39], leading to top decays t → Zc [104], Zt production at LHC [105,106] and single top production at linear colliders [107,108,109,110]. For m T ∼ m t the new contributions to meson observables involving T diagrams are small, and this FCN coupling can be relatively large, |X ct | = 0.036 (see Fig.…”

Section: Mixing With An Up Singletmentioning

confidence: 99%

Erratum: Effects of mixing with quark singlets [Phys. Rev. D67, 035003 (2003)]

2004

View full text Add to dashboard Cite

The mixing of the known quarks with new heavy singlets can modify significantly some observables with respect to the Standard Model predictions. We analyse the range of deviations permitted by the constraints from precision electroweak data and flavour-changing neutral processes at low energies. We study top charged current and neutral current couplings, which will be directly tested at top factories, like LHC and TESLA. We discuss some examples of observables from K and B physics, as the branching ratio of K L → π 0 νν, the B 0 s mass difference or the time-dependent CP asymmetry in B 0 s → D + s D − s , which can also show large new effects.

show abstract

“…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]. The theoretical branching ratios and the experimental limits are summarised in Table 8.…”

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.

715

161

View full text Add to dashboard Cite

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.

show abstract

Top flavour-changing neutral coupling signals at a linear collider

Cited by 45 publications

References 26 publications

Supersymmetry-induced flavor-changing neutral-current top-quark processes at the CERN Large Hadron Collider

Supersymmetry-induced flavor-changing neutral-current top-quark processes at the CERN Large Hadron Collider

Erratum: Effects of mixing with quark singlets [Phys. Rev. D67, 035003 (2003)]

CMS Physics Technical Design Report, Volume II: Physics Performance

Contact Info

Product

Resources

About