Hints of new physics in bottomonium decays and spectroscopy

A non-standard light CP-odd Higgs boson could induce a slight (but observable) lepton universality breakdown in Upsilon leptonic decays. Moreover, the mixing between such a pseudoscalar Higgs and

\eta_b

states might shift the mass levels of the latter, thereby changing the values of the

m_{\Upsilon(nS)}-m_{\eta_b(nS)}

splittings predicted in the standard model. Besides, also the

\eta_b

width could be broader than expected, with potentially negative consequences for its discovery in both

e^+e^-

and hadron colliders.

talk: Chicago 2004/06/27
quarkonium: hadron spectroscopy
quarkonium: leptonic decay
bottomonium
upsilon mesons: mass difference
quarkonium: width
Higgs particle: pseudoscalar particle
Higgs particle: mixing angle
eta/b: width
Higgs particle: multiplet

References(12)

Figures(0)

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