https://doi.org/10.1140/epjc/s10052-018-5895-9
Regular Article - Theoretical Physics
Beam polarization effects on top-pair production at the ILC
1
The Graduate University for Advanced Studies (SOKENDAI), Hayama, Kanagawa, 240-0193, Japan
2
High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki, 305-0801, Japan
3
University of Science Ho Chi Minh City, 227 Nguyen Van Cu, Dist. 5, Ho Chi Minh City, Vietnam
4
Nikhef, Science Park 105, 1098 XG, Amsterdam, The Netherlands
* e-mail: yoshimasa.kurihara@kek.jp
Received:
11
June
2017
Accepted:
14
May
2018
Published online:
28
May
2018
Full one-loop electroweak corrections for an 
process associated with sequential 
decay are discussed. At the one-loop level, the spin-polarization effects of the initial electron and positron beams are included in the total and differential cross sections. A narrow-width approximation is used to treat the top-quark production and decay while including full spin correlations between them. We observed that the radiative corrections due to the weak interaction have a large polarization dependence on both the total and the differential cross sections. Therefore, experimental observables that depend on angular distributions such as the forward–backward asymmetry of the top-production angle must be treated carefully including radiative corrections. We also observed that the energy distribution of bottom quarks is largely affected by the radiative corrections.
© The Author(s), 2018
