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- W4386439637 abstract "The determination of the $Zboverline{b}$ coupling in experiments has been a longstanding challenge, as the limited precision of off $Z$-pole measurements at the LEP has resulted in two degenerate solutions remained to be resolved. In this paper, we propose a novel method to probe the $Zboverline{b}$ coupling by measuring the forward-backward asymmetry of the bottom quark, ${A}_{mathrm{FB}}^{b}$, in the $boverline{b}$ system of the ${e}^{+}{e}^{ensuremath{-}}ensuremath{rightarrow}boverline{b}ensuremath{gamma}$ and/or ${e}^{+}{e}^{ensuremath{-}}ensuremath{rightarrow}boverline{b}g$ processes at the $Z$-pole of future lepton colliders. The additional hard photon or light jet radiation can mimic the energy scanning of the ${e}^{+}{e}^{ensuremath{-}}ensuremath{rightarrow}boverline{b}$ process, and the ${A}_{mathrm{FB}}^{b}$ distribution from the $ensuremath{gamma}text{ensuremath{-}}Z$ interference process is linearly sensitive to the $Zboverline{b}$ coupling. By combining the expected measurements of ${R}_{b}^{0}$ and ${A}_{mathrm{FB}}^{0,b}$ at the $Z$-pole at the CEPC, the ${A}_{mathrm{FB}}^{b}$ distributions can break the degeneracy observed at the LEP, leading to a unique determination of the $Zboverline{b}$ coupling through $Z$-pole running alone." @default.
- W4386439637 created "2023-09-06" @default.
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- W4386439637 date "2023-09-05" @default.
- W4386439637 modified "2023-10-14" @default.
- W4386439637 title "Probing the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>Z</mml:mi><mml:mi>b</mml:mi><mml:mover accent=true><mml:mi>b</mml:mi><mml:mo stretchy=false>¯</mml:mo></mml:mover></mml:math> coupling at the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>Z</mml:mi></mml:math> -pole of future lepton colliders" @default.
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- W4386439637 doi "https://doi.org/10.1103/physrevd.108.053001" @default.
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