D+ --> Pμμ and Ds+--> Pμμ

Scott Brunner, Robert Harr and Bill Ashmanskas

Summary of D+ and Ds+ decays to 3 charged tracks

D+ modes

modePDG B.R.experimentstheory B.R.
π+μ+μ-< 8.8×10-6FOCUS1×10-6
π-μ+μ+< 4.8×10-6FOCUSLF
π+π+π-(3.1±0.4)×10-3E791, E687, E691
K+μ+μ-< 9.2×10-6FOCUS7×10-9
K-μ+μ+< 13×10-6FOCUSLF
K+π+π-(6.8±1.5)×10-4E791, E687
K-π+π+(9.1±0.6)×10-2CLEO II, MARK 3, MARK II, MARK I
K+K-π+(8.8±0.8)×10-3SELEX, E687
K+K+π-n.a.n.a.ΔS=2
K+K+K-< 1.4×10-4E687

D+s modes

modePDG B.R.experimentstheory B.R.
π+μ+μ-< 26×10-6FOCUS6.11×10-6
π-μ+μ+< 29×10-6FOCUSLF
π+π+π-(1.01±0.28)×10-2E791, WA82, E691
K+μ+μ-< 36×10-6FOCUS4.3×10-8
K-μ+μ+< 13×10-6FOCUSLF
K+π+π-(1.0±0.4)×10-2E687
K-π+π+n.a.n.a.
K+K-π+(4.4±1.2)×10-2CLEO II BES
K+K+π-n.a.n.a.ΔS=2
K+K+K-< 6×10-4E687

Bibliography, with links

Previous measurements

D0 --> μ+μ-

BEATRICE, M. Adamovich et al., Phys. Lett. B 408, 469 (1997).

E771, T. Alexopoulos et al., Phys. Rev. Lett. 77, 2380 (1996).

E789, D. Pripstein et al., Phys. Rev. D 61, 032005 (2000)

E791, E.M. Aitala et al., FERMILAB-Pub-00/280-E (2000).

Search for Rare and Forbidden Dilepton Decays of the D+, Ds+, and D0 Charmed Mesons, E791, E.M. Aitala et al., Phys. Lett. B 462, 401 (1999).

D0 --> X l+l-

Search for Rare and Forbidden Charm Meson Decays D0--> V l+l- and h h l l, E791, E.M. Aitala et al., Phys. Rev. Lett. 86, 3969 (2001).

D+(s) --> X μμ

Search for Rare and Forbidden 3-body Di-muon Decays of the Charmed Mesons D+ and Ds+, FOCUS, J.M. Link et al., arXiv:hep-ex/0306049 (2003). (submitted to Phys. Lett. B)

Rare Decays Recent Results from FOCUS (+Theory), Will E. Johns (for the FOCUS collaboration), arXiv:hep-ex/0207015 (2002).

Theory

D0 --> l+l-

Flavor changing neutral currents in charm sector, S. Pakvasa, hep-ph/9705397 .

Indirect probes of new physics, J.L. Hewett, T. Takeuchi, S. Thomas, hep-ph/9603391, 44-53.

Probing new physics in the charm sector, J. Hewett, SLAC-PUB 95-6821 (1995).

Radiative Weak Decays of Charm Mesons, G. Burdman, E. Golowich, J.L. Hewett, S. Pakvasa, Phys. Rev. D 52, 6383 (1995) or SLAC-PUB-6692 (1995).

D+ --> X+ l+l-

Rare Charm Decays in the Standard Model and Beyond, G. Burdman, E. Golowich, J.L. Hewett, S. Pakvasa, Phys. Rev. D 66, 014009 (2002) or hep-ph/0112235

Rare charm meson decays D->Pl+l- and c->ul+l- in SM and MSSM, S. Fajfer, S. Prelovsek, P. Singer, Phys. Rev. D 64, 114009 (2001) or hep-ph/0106333

Computing confidence level limits

Setting confidence belts, Byron P. Roe and Michael B. Woodroofe, Phys. Rev. D 63, 013009 (2000).

Unified approach to the classical statistical analysis of small signals, G.J. Feldman and R.D. Cousins, Phys. Rev. D 57, 3873 (1998).

Incorporating systematic uncertainties into an upper limit, R.D. Cousins and V.L. Highland, Nucl. Instrum. Meth. A320, 331 (1992).

© Robert Harr 2003