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

Abstract EN

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 γ e - → t ¯ b ν e ( γ is the Compton backscattering photon) and e + e - → e - γ ⁎ e + → t ¯ b ν 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 s y s = 0 % ( 5 % ) , b - t a g g i n g e f f i c i e n c y = 0.8 , center-of-mass energy of s = 3 T e V , and integrated luminosity of L = 2 a b - 1 the future e + e - collider may put bounds on the electromagnetic dipole moments a ^ V and a ^ A of the top quark of the order of O ( 1 0 - 2 – 1 0 - 1 ) at the 2 σ ( 3 σ ) level, which are competitive with those recently reported in previous studies at hadron colliders and the ILC.