Bounds on the Electromagnetic Dipole Moments through the Single Top Production at the CLIC

Abstract

We obtain bounds on the anomalous magnetic and electric dipole moments of the t-quark from a future high-energy and high-luminosity linear electron-positron collider, as the CLIC, with polarized and unpolarized electron beams which are powerful tools for determining new physics. We consider the processes γe − →tbν e (γ is the Compton backscattering photon) and e + e − → e − γ * e + →tbν e e + (γ * is the Weizsacker-Williams photon) as they are one of the most important sources of single top-quark production. For systematic uncertainties of δ sys = 0% (5%), b − tagging efficiency = 0.8, center-of-mass energy of √ s = 3 T eV and integrated luminosity of L = 2 ab −1 the future e + e − collider may put bounds on the electromagnetic dipole momentsâ V andâ A of the top quark of the order of O(10 −2 − 10 −1 ) at the 2σ (3σ) level, which are competitive with those recently reported in previous studies at hadron colliders and the ILC.

Effects of universal extra dimensions on top-quark electromagnetic interactions

“…As discussed in Refs. [135][136][137], more sensitivity improvements in searches of the top-quark AMM are expected from future linear colliders and from physical processes occurring at the Large Hadron Collider as well.…”

Projections for model-independent limit estimates on top-quark anomalous electromagnetic couplings at the FCC-he

“…11 and 12, where the increases in sensitivity are even more notable with individual sensitivities onâ V andâ A . This level of sensitivity becomes comparable to that at which future electroweak precision tests may constrain the anomalous couplingsâ V andâ A as is the case of the ILC and CLIC [24][25][26].…”

“…Top-quark pair production at LHC (−0.041, 0.043), (−0.035, 0.038) 68% [19] ttγ production at LHC (−0.2, 0.2), (−0.1, 0.1) 90% [20] Radiative b → sγ transitions at Tevatron and LHC (−2, 0.3), (−0.5, 1.5) 90% [21] Process pp → pγ * γ * p → pttp at LHC (−0.6389, 0.0233), (−0.1158, 0.1158) 68% [22] Measurements of γp → tt at LHeC (−0.05, 0.05), (−0.20, 0.20) 90% [23] Top-quark pair production e + e − → tt at ILC (−0.002, 0.002), (−0.001, 0.001) 68% [24] Process γe − →tbν e at CLIC (−0.0258, 0.0350), (−0.0301, 0.0301) 95% [25] Process e + e − → e + γ * e − →tbν e e + at CLIC (−0.0609, 0.1081), (−0.0777, 0.0777) 95% [25] Mode γγ → tt at CLIC (−0.02203, 0.0020), (−0.0206, 0.0206) 95% [26] Mode e + γ → e + γ * γ → e + tt at CLIC (−0.4570, 0.0045), (−0.0431, 0.0431) 95% [26] Mode e + e − → e + γ * γ * e − → e + tte − at CLIC (−0.6013, 0.0151), (−0.0890, 0.0890) 95% [26] The structure of this paper is as follows. In Section II, we introduce the top-quark effective electromagnetic interactions.…”

Probing the anomalous electromagnetic dipole moments of the top quark in γp collision at the LHC, the HL-LHC and the HE-LHC

“…Studies at the Tevatron and the LHC were recommended to obtain the electromagnetic dipole moments of the top quark in measurements of the processes pp → ttγ [6], pp → tjγ [7,8] and pp → pγ * γ * p → pttp [9]. The reactions e − e + → tt [10], γe →tbν e [11], e − e + → e − γ * e + →tbν e e + [11], γγ → tt [12] and e − e + → e − γ * γ * e + → e − tte + [12] at the future e − e + linear colliders and their operating modes of eγ, eγ * , γγ and γ * γ * were investigated to set the limits on the electric and magnetic dipole moments of the top quark.…”