Top quark spin correlations in the Randall-Sundrum model at the CERN Large Hadron Collider

@article{Arai2007TopQS,
  title={Top quark spin correlations in the Randall-Sundrum model at the CERN Large Hadron Collider},
  author={Masato Arai and Nobuchika Okada and Karel Smolek and Vladislav {\vS}im{\'a}k},
  journal={Physical Review D},
  year={2007},
  volume={75},
  pages={095008}
}
In the Randall-Sundrum model, we study top-antitop pair production and top spin correlations at the Large Hadron Collider. In addition to the standard model processes, there is a new contribution to the top-antitop pair production process mediated by graviton Kaluza-Klein modes in the s-channel. We calculate the density matrix for the top-antitop pair production including the new contribution. With a reasonable parameter choice in the Randall-Sundrum model, we find a sizable deviation of the… Expand

Figures from this paper

Influence of graviton on top-antitop production at the LHC
We examine the top quark production in the brane world scenario. We study two typical models - the model proposed by Arkani-Hamed, Dimopoulos and Dvali (ADD) and the model of Randall and SundrumExpand
Top-antitop and top-top resonances in the dilepton channel at the CERN LHC
We perform a model-independent study for top-antitop and top-top resonances in the dilepton channel at the Large Hadtron Collider. In this channel, we can solve the kinematic system to obtain theExpand
Single production of sleptons with polarized tops at the large hadron collider
We study the production of a single charged slepton in association with a top quark in a R-parity violating supersymmetric model with lepton number violating interactions at the Large HadronExpand
Viable Randall-Sundrum model for quarks and leptons with T' family symmetry
We propose a Randall-Sundrum model with a bulk family symmetry based on the double tetrahedral group, T{sup '}, which generates the tribimaximal neutrino mixing pattern and a realistic CKM matrix,Expand
Constraints on Randall-Sundrum model from top-antitop production at the LHC
A bstractWe study the top pair production cross section at the LHC in the context of Randall-Sundrum model including the Kaluza-Klein (KK) excited gravitons. It is shown that the recent measurementExpand
The scalars from the topcolor scenario and the spin correlations of the top pair production at the LHC
The topcolor scenario predicts the existence of some new scalars. In this paper, we consider the contributions of these new particles to the observables, which are related to the top quark pairExpand
A new twist on top quark spin correlations
A bstractTop-antitop pairs produced at hadron colliders are largely unpolarized, but their spins are highly correlated. The structure of these correlations varies significantly over top productionExpand
Measurement of the Spin Correlation in the Top Quark Pair Production using the Dilepton Events in 1.96-TeV Proton-Antiproton Collisions
One of the most remarkable properties of the top quark is its e x remely short lifetime, which allows us to observe the top quark spin at its productio n. That means a spin correlation attt̄Expand
Probing top charged-Higgs production using top polarization at the Large Hadron Collider
We study single top production in association with a charged Higgs in the type II two Higgs doublet model at the Large Hadron Collider. The polarization of the top, reflected in the angularExpand
Improving the top quark forward-backward asymmetry measurement at the LHC
A bstractAt the LHC, top quark pairs are dominantly produced from gluons, making it difficult to measure the top quark forward-backward asymmetry. To improve the asymmetry measurement, we studyExpand
...
1
2
3
4
...

References

SHOWING 1-10 OF 57 REFERENCES
Top quark pair production and decay at hadron colliders
In ongoing and upcoming hadron collider experiments, top quark physics will play an important role in testing the Standard Model and its possible extensions. In this work we present analytic resultsExpand
Angular correlations in top quark pair production and decay at hadron colliders.
  • Mahlon, Parke
  • Physics, Medicine
  • Physical review. D, Particles and fields
  • 1996
We show how to observe sizable angular correlations between the decay products of the top quark and those of the top antiquark in top quark pair production and decay at hadron colliders. TheseExpand
Maximizing spin correlations in top quark pair production at the Tevatron
Abstract A comparison is made between the off-diagonal and helicity spin bases for top quark pair production at the FNAL Tevatron. In the off-diagonal basis, 92% of the top quark pairs are in theExpand
Top-quark spin correlations at hadron colliders: predictions at next-to-leading order QCD.
TLDR
This Letter presents for the reactions pp, pp-->tt+X-->l+l'-+X the first calculation of the dilepton angular distribution at next-to-leading order in the QCD coupling, keeping the full dependence on the spins of the intermediate tt state. Expand
Spin correlation in top quark production at hadron colliders
We propose techniques to observe the correlation of the spins of top quarks and antiquarks at the Tevatron and the LHC. Observation of the spin correlation would confirm that the top quark decaysExpand
Spin-Spin Correlations of Top Quark Pairs at Hadron Colliders
Abstract Top quark pairs are produced with strongly correlated spins in the partonic reactions q q → t t and gg → t t . A complete description of these effects in terms of the spin density matrix ofExpand
Maximizing the spin correlation of top quark pairs produced at the Large Hadron Collider
The measurement of top quark spin correlation is an important tool for precise studies of top quark interactions. In this Letter I construct a quantization axis maximizing the spin correlation at theExpand
Proposal for Detecting Top Spin Correlation Effects at the Fermilab Tevatron.
We propose to observe the top spin correlation effect at the Fermilab Tevatron through the measurement of the correlated asymmetries of the charged lepton momenta using the dilepton decay events ofExpand
Experimental probes of localized gravity: On and off the wall
The phenomenology of the Randall-Sundrum model of localized gravity is analyzed in detail for the two scenarios where the Standard Model (SM) gauge and matte fields are either confined to a TeV scaleExpand
New dimensions at a millimeter to a Fermi and superstrings at a TeV
Abstract Recently, a new framework for solving the hierarchy problem has been proposed which does not rely on low energy supersymmetry or technicolor. The gravitational and gauge interactions uniteExpand
...
1
2
3
4
5
...