Survey of top quark polarization at a polarized linear<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>collider

Groote, S.; Körner, J. G.; Melić, Blaženka; Prelovšek, Saša

doi:10.1103/physrevd.83.054018

Cited by 15 publications

(16 citation statements)

References 39 publications

(113 reference statements)

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“…Parke and Shadmi have introduced the chiral electroweak coupling factors f LL and f LR which can be related to our coupling factors g ij by [30] …”

Section: Results In the Bases Of Parke And Shadmimentioning

confidence: 99%

“…However, since the polarisation effects are governed by P eff and not by h ∓ = −h ± = ∓1, one can get very close to the limiting cases P eff = ∓1 with presently achievable degrees of beam polarisation of ∼ 80 % (see the discussion in Ref. [30]). For example, for h − = −h + = −0.8 one has P eff = −0.976.…”

Section: Dependence On Initial Beam Polarisationmentioning

confidence: 99%

“…Here we decide to define the angle via the single-spin quantity, as it was done in Ref. [30]. This definition is physically more transparent.…”

Section: Going Beyond the Born Term Level The Simultaneous Disappearmentioning

confidence: 99%

“…where h − and h + are twice the helicities of the initial electron and positron beams, respectively [30]. For the normalised density matrix elements one remains with the single parameter dependence given by Ref.…”

Section: Dependence On Initial Beam Polarisationmentioning

confidence: 99%

“…Ref. [30]). For O ll it amounts to 10% close to cos θ = −0.7 while the single-spin observable can change locally by more than 100%.…”

Section: Dependence On Initial Beam Polarisationmentioning

confidence: 99%

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Analytical O(αs) corrections to the beam frame double-spin density matrix elements of e<

2016

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“…Parke and Shadmi have introduced the chiral electroweak coupling factors f LL and f LR which can be related to our coupling factors g ij by [30] …”

Section: Results In the Bases Of Parke And Shadmimentioning

confidence: 99%

Section: Dependence On Initial Beam Polarisationmentioning

confidence: 99%

“…Here we decide to define the angle via the single-spin quantity, as it was done in Ref. [30]. This definition is physically more transparent.…”

Section: Going Beyond the Born Term Level The Simultaneous Disappearmentioning

confidence: 99%

Section: Dependence On Initial Beam Polarisationmentioning

confidence: 99%

“…Ref. [30]). For O ll it amounts to 10% close to cos θ = −0.7 while the single-spin observable can change locally by more than 100%.…”

Section: Dependence On Initial Beam Polarisationmentioning

confidence: 99%

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Analytical O(αs) corrections to the beam frame double-spin density matrix elements of e<

2016

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Azimuthal correlation function of polarized top quark in noncommutative space–time

Rezaei

Salehi

2019

Annals of Physics

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Top quark decays before hadronization and its information transfer to final products. The top quark decays via the weak interaction, hence the azimuthal polarized decay rate is zero in the leading order of SM. Therefore the study of top quark could be taken into consideration as useful tools to search for new physics. In this paper, we calculate the decay of polarized top quark t(↑) → bW + → bℓ + υ ℓ , in the framework of the noncommutative standard model. We investigate the contribution of noncommutative space-time on the azimuthal polarized decay rate and spin analysing power. Also we depict the energy spectrum for the charged lepton and the variation of the total differential decay rate with respect to the azimuthal angle φ which receive some correction in noncommutative space-time.

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Top-quark charge asymmetry and polarization intt¯W±production at the LHC

et al. 2014

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We study the charge asymmetry between the t andt quarks at the LHC, when they are produced in association with a W boson. Though sizably reducing the cross section with respect to the inclusive production, requiring a W boson in the final state has two important implications. First, at leading order in QCD, ttW ± production can only occur via qq annihilation. As a result, the asymmetry between the t andt generated at NLO in QCD is significantly larger than that of inclusive tt production, which is dominated by gluon fusion. Second, the top quarks tend to inherit the polarization of the initial-state quarks as induced by the W -boson emission. Hence, the decay products of the top quarks display a sizable asymmetry already at the leading order in QCD. We study the relevant distributions and their uncertainties in the standard model, compare them to those obtained in a simple axigluon model and discuss prospects for measurements at the LHC and beyond.

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Survey of top quark polarization at a polarized lineare+e−collider

Cited by 15 publications

References 39 publications

Analytical O(αs) corrections to the beam frame double-spin density matrix elements of e<

Analytical O(αs) corrections to the beam frame double-spin density matrix elements of e<

Azimuthal correlation function of polarized top quark in noncommutative space–time

Top-quark charge asymmetry and polarization intt¯W±production at the LHC

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