@article{d4081e649fe841a4b82eb4f44c93dcdc,
title = "Improved upper limits on the flavor-changing neutral current decays B→Kℓ+ℓ- and B→K*(892)ℓ+ℓ-",
abstract = "We have searched a sample of 9.6×106 B¯B events for the flavor-changing neutral current decays B→Kℓ+ℓ- and B→K*(892)ℓ+ℓ-. We subject the latter decay to the requirement that the dilepton mass mℓℓ exceed 0.5 GeV. There is no indication of a signal. We obtain the 90% confidence level upper limits B(B→Kℓ+ℓ-) < 1.7×10-6 and B(B→K*(892)ℓ+ℓ-)mℓℓ>0.5Gev< 3.3×10-6. We also obtain an upper limit on the weighted average 0.65B B(B→Kℓ+ℓ-)+0.35B(B→K*(892)ℓ+ℓ-)mℓℓ>0.5Gev < 1.5×10-6. The weighted-average limit is only 50% above the standard model prediction.",
author = "{CLEO Collaboration} and S. Anderson and Frolov, {V. V.} and Y. Kubota and Lee, {S. J.} and R. Poling and A. Smith and Stepaniak, {C. J.} and J. Urheim and S. Ahmed and Alam, {M. S.} and Athar, {S. B.} and L. Jian and L. Ling and M. Saleem and S. Timm and F. Wappler and A. Anastassov and E. Eckhart and Gan, {K. K.} and C. Gwon and T. Hart and K. Honscheid and D. Hufnagel and H. Kagan and R. Kass and Pedlar, {T. K.} and Thayer, {J. B.} and {Von Toerne}, E. and Zoeller, {M. M.} and Richichi, {S. J.} and H. Severini and P. Skubic and A. Undrus and V. Savinov and S. Chen and Hinson, {J. W.} and J. Lee and Miller, {D. H.} and Shibata, {E. I.} and Shipsey, {I. P.J.} and V. Pavlunin and D. Cronin-Hennessy and Y. Kwon and Lyon, {A. L.} and W. Park and Thorndike, {E. H.} and Coan, {T. E.} and M. Artuso and T. Skwarnicki and S. Stone",
year = "2001",
month = jan,
day = "1",
doi = "10.1103/PhysRevLett.87.181803",
language = "English (US)",
volume = "87",
pages = "181803",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "18",
}