Rare charm meson decays D->Pl^+l^- and c->ul^+l^- in SM and MSSM

Details Rare charm meson decays D->Pl^+l^- and c->ul^+l^- in SM and MSSM Rare charm meson decays D->Pl^+l^- and c->ul^+l^- in SM and MSSM

2001-06-28

arxiv.org/abs/hep-ph/0106333v1

Phys.Rev.D64:114009,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages

Scientific paper

10.1103/PhysRevD.64.114009

We study the nine possible rare charm meson decays D->Pl^+l^- (P=pi,K,eta,eta') using the Heavy Meson Chiral Lagrangians and find them to be dominated by the long distance contributions. The decay D^+ -> pi^+l^+l^- with the branching ratio 1*10^(-6) is expected to have the best chances for an early experimental discovery. The short distance contribution in the five Cabibbo suppressed channels arises via the c->ul^+l^- transition; we find that this contribution is detectable only in the D->pi l^+l^- decay, where it dominates the differential spectrum at high-q^2. The general Minimal Supersymmetric Standard Model can enhance the c->ul^+l^- rate by up to an order of magnitude; its effect on the D->Pl^+l^- rates is small since the c->ul^+l^- enhancement is sizable in low-q^2 region, which is inhibited in the hadronic decay.

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