The Isgur-Wise function in the BPS limit

Details The Isgur-Wise function in the BPS limit The Isgur-Wise function in the BPS limit

2006-11-02

arxiv.org/abs/hep-ph/0611031v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

From sum rules in the heavy quark limit of QCD, using the non-forward
amplitude, we demonstrate that if the slope rho^2 = -xsi'(1) of the Isgur-Wise
function xsi(w) attains its lower bound 3/4 (as happens in the BPS limit
proposed by Uraltsev), the IW function is completely determined, given by the
function xsi(w) = [2/(w+1)]^(3/2).

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