Shifting $R_b$ with $A^b_{FB}$

Details Shifting $R_b$ with $A^b_{FB}$ Shifting $R_b$ with $A^b_{FB}$

1998-05-10

arxiv.org/abs/hep-ph/9805273v1

Phys.Rev. D58 (1998) 097301

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 1 Figure, LaTex file

Scientific paper

10.1103/PhysRevD.58.097301

Precision measurements at the $Z$ resonance agree well with the standard model. However, there is still a hint of a discrepancy, not so much in $R_b$ by itself (which has received a great deal of attention in the past several years) but in the forward-backward asymmetry $A^b_{FB}$ together with $R_b$. The two are of course correlated. We explore the possibilty that these and other effects are due to the mixing of $b_L$ and $b_R$ with one or more heavy quarks.

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