We propose a new type of Z polarization asymmetry in bottom-Z production at LHC that should be realistically measurable and would provide the determination of the so-called Ab parameter, whose available measured value still appears to be in disagreement with the Standard Model prediction; we discuss the overall expected precision of this measurement and its implications. If Supersymmetry is found, a second polarization, i.e. the top longitudinal polarization in top-charged Higgs production, would neatly identify the tan β parameter. In this case, the value of Ab should be in agreement with the Standard Model. If Supersymmetry does not exist, a residual disagreement of AbAb from the Standard Model prediction would be a clean signal of New Physics of “non-Supersymmetric” origin.

New Physics signals from measurable polarization asymmetries at LHC

PANIZZO, GIANCARLO;VERZEGNASSI, CLAUDIO
2014

Abstract

We propose a new type of Z polarization asymmetry in bottom-Z production at LHC that should be realistically measurable and would provide the determination of the so-called Ab parameter, whose available measured value still appears to be in disagreement with the Standard Model prediction; we discuss the overall expected precision of this measurement and its implications. If Supersymmetry is found, a second polarization, i.e. the top longitudinal polarization in top-charged Higgs production, would neatly identify the tan β parameter. In this case, the value of Ab should be in agreement with the Standard Model. If Supersymmetry does not exist, a residual disagreement of AbAb from the Standard Model prediction would be a clean signal of New Physics of “non-Supersymmetric” origin.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11368/2758962
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