Phys. Rev. D
68,
011102(R)
(2003)
[5 pages]
Search for baryons in the radiative penguin decay b⃗sγ
K. W. Edwards et al. (CLEO Collaboration)
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K. W. Edwards1, D. Besson2, S. Anderson3, V. V. Frolov3, D. T. Gong3, Y. Kubota3, S. Z. Li3, R. Poling3, A. Smith3, C. J. Stepaniak3, J. Urheim3, Z. Metreveli4, K.K. Seth4, A. Tomaradze4, P. Zweber4, S. Ahmed5, M. S. Alam5, J. Ernst5, L. Jian5, M. Saleem5, F. Wappler5, K. Arms6, E. Eckhart6, K. K. Gan6, C. Gwon6, K. Honscheid6, H. Kagan6, R. Kass6, T. K. Pedlar6, E. von Toerne6, H. Severini7, P. Skubic7, S.A. Dytman8, J.A. Mueller8, S. Nam8, V. Savinov8, J. W. Hinson8, G. S. Huang9, J. Lee9, D. H. Miller9, V. Pavlunin9, B. Sanghi9, E. I. Shibata9, I. P. J. Shipsey9, D. Cronin-Hennessy10, C. S. Park10, W. Park10, J. B. Thayer10, E. H. Thorndike10, T. E. Coan11, Y. S. Gao11, F. Liu11, R. Stroynowski11, M. Artuso12, C. Boulahouache12, S. Blusk12, E. Dambasuren12, O. Dorjkhaidav12, R. Mountain12, H. Muramatsu12, R. Nandakumar12, T. Skwarnicki12, S. Stone12, J.C. Wang12, A. H. Mahmood13, S. E. Csorna14, I. Danko14, G. Bonvicini15, D. Cinabro15, M. Dubrovin15, S. McGee15, A. Bornheim16, E. Lipeles16, S. P. Pappas16, A. Shapiro16, W. M. Sun16, A. J. Weinstein16, R. A. Briere17, G. P. Chen17, T. Ferguson17, G. Tatishvili17, H. Vogel17, M. E. Watkins17, N. E. Adam18, J. P. Alexander18, K. Berkelman18, V. Boisvert18, D. G. Cassel18, J. E. Duboscq18, K. M. Ecklund18, R. Ehrlich18, R. S. Galik18, L. Gibbons18, B. Gittelman18, S. W. Gray18, D. L. Hartill18, B. K. Heltsley18, L. Hsu18, C. D. Jones18, J. Kandaswamy18, D. L. Kreinick18, A. Magerkurth18, H. Mahlke-Krüger18, T. O. Meyer18, N. B. Mistry18, J. R. Patterson18, D. Peterson18, J. Pivarski18, S. J. Richichi18, D. Riley18, A. J. Sadoff18, H. Schwarthoff18, M. R. Shepherd18, J. G. Thayer18, D. Urner18, T. Wilksen18, A. Warburton18,*, M. Weinberger18, S. B. Athar19, P. Avery19, L. Breva-Newell19, V. Potlia19, H. Stoeck19, J. Yelton19, B. I. Eisenstein20, G. D. Gollin20, I. Karliner20, N. Lowrey20, C. Plager20, C. Sedlack20, M. Selen20, J. J. Thaler20, and J. Williams20 (CLEO Collaboration)
1Carleton University, Ottawa, Ontario, Canada K1S 5B6 and the Institute of Particle Physics, Canada M5S 1A7
2University of Kansas, Lawrence, Kansas 66045, USA
3University of Minnesota, Minneapolis, Minnesota 55455, USA
4Northwestern University, Evanston, Illinois 60208, USA
5State University of New York at Albany, Albany, New York 12222, USA
6Ohio State University, Columbus, Ohio 43210, USA
7University of Oklahoma, Norman, Oklahoma 73019, USA
8University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
9Purdue University, West Lafayette, Indiana 47907, USA
10University of Rochester, Rochester, New York 14627, USA
11Southern Methodist University, Dallas, Texas 75275, USA
12Syracuse University, Syracuse, New York 13244, USA
13University of Texas - Pan American, Edinburg, Texas 78539, USA
14Vanderbilt University, Nashville, Tennessee 37235, USA
15Wayne State University, Detroit, Michigan 48202, USA
16California Institute of Technology, Pasadena, California 91125, USA
17Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
18Cornell University, Ithaca, New York 14853, USA
19University of Florida, Gainesville, Florida 32611, USA
20University of Illinois, Urbana-Champaign, Illinois 61801, USA
Received 2 May 2003; published 28 July 2003
We have searched for the baryon-containing radiative penguin decays B-→Λp̅ γ and B-→Σ0p̅ γ, using a sample of 9.7×106 BB̅ events collected at the Υ(4S) with the CLEO detector. We find no evidence for either, and set 90% confidence level upper limits of B(B-→Λp̅ γ)+0.3B(B-→Σ0p̅ γ)]Eγ>2.0 GeV<3.3×10-6, [B(B-→Σ0p̅ γ)+0.4B(B-→Λp̅ γ)]Eγ>2.0 GeV<6.4×10-6. From the latter, we estimate B(B⃗Xsγ,Xs containing baryons)Eγ>2.0 GeV<3.8×10-5. This limit implies upper limits on corrections to CLEO’s recent measurement of branching fraction, mean photon energy, and variance in photon energy from b⃗sγ that are less than half the combined statistical and systematic errors quoted on these quantities.
© 2003 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.68.011102
DOI:
10.1103/PhysRevD.68.011102
PACS:
13.20.He, 13.40.Hq, 13.60.Rj
*Present address: McGill University, Montréal, Québec, Canada H3A 2T8.
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