Phys. Rev. Lett.
85,
515–519
(2000)
Observation of B→K±π0 and B→K0π0, and Evidence for B→π+π-
D. Cronin-Hennessy et al. (CLEO Collaboration)
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D. Cronin-Hennessy1, Y. Kwon1,*, A. L. Lyon1, E. H. Thorndike1, C. P. Jessop2, H. Marsiske2, M. L. Perl2, V. Savinov2, D. Ugolini2, X. Zhou2, T. E. Coan3, V. Fadeyev3, Y. Maravin3, I. Narsky3, R. Stroynowski3, J. Ye3, T. Wlodek3, M. Artuso4, R. Ayad4, C. Boulahouache4, K. Bukin4, E. Dambasuren4, S. Karamnov4, S. Kopp4, G. Majumder4, G. C. Moneti4, R. Mountain4, S. Schuh4, T. Skwarnicki4, S. Stone4, G. Viehhauser4, J. C. Wang4, A. Wolf4, J. Wu4, S. E. Csorna5, I. Danko5, K. W. McLean5, Sz. Márka5, Z. Xu5, R. Godang6, K. Kinoshita6,†, I. C. Lai6, S. Schrenk6, G. Bonvicini7, D. Cinabro7, L. P. Perera7, G. J. Zhou7, G. Eigen8, E. Lipeles8, M. Schmidtler8, A. Shapiro8, W. M. Sun8, A. J. Weinstein8, F. Würthwein8,‡, D. E. Jaffe9, G. Masek9, H. P. Paar9, E. M. Potter9, S. Prell9, V. Sharma9, D. M. Asner10, A. Eppich10, J. Gronberg10, T. S. Hill10, D. J. Lange10, R. J. Morrison10, H. N. Nelson10, R. A. Briere11, B. H. Behrens12, W. T. Ford12, A. Gritsan12, J. Roy12, J. G. Smith12, J. P. Alexander13, R. Baker13, C. Bebek13, B. E. Berger13, K. Berkelman13, F. Blanc13, V. Boisvert13, D. G. Cassel13, M. Dickson13, P. S. Drell13, K. M. Ecklund13, R. Ehrlich13, A. D. Foland13, P. Gaidarev13, L. Gibbons13, B. Gittelman13, S. W. Gray13, D. L. Hartill13, B. K. Heltsley13, P. I. Hopman13, C. D. Jones13, D. L. Kreinick13, M. Lohner13, A. Magerkurth13, T. O. Meyer13, N. B. Mistry13, C. R. Ng13, E. Nordberg13, J. R. Patterson13, D. Peterson13, D. Riley13, J. G. Thayer13, P. G. Thies13, B. Valant-Spaight13, A. Warburton13, P. Avery14, C. Prescott14, A. I. Rubiera14, J. Yelton14, J. Zheng14, G. Brandenburg15, A. Ershov15, Y. S. Gao15, D. Y.-J. Kim15, R. Wilson15, T. E. Browder16, Y. Li16, J. L. Rodriguez16, H. Yamamoto16, T. Bergfeld17, B. I. Eisenstein17, J. Ernst17, G. E. Gladding17, G. D. Gollin17, R. M. Hans17, E. Johnson17, I. Karliner17, M. A. Marsh17, M. Palmer17, C. Plager17, C. Sedlack17, M. Selen17, J. J. Thaler17, J. Williams17, K. W. Edwards18a,18b, R. Janicek19a,19b, P. M. Patel19a,19b, A. J. Sadoff20, R. Ammar21, A. Bean21, D. Besson21, R. Davis21, I. Kravchenko21, N. Kwak21, X. Zhao21, S. Anderson22, V. V. Frolov22, Y. Kubota22, S. J. Lee22, R. Mahapatra22, J. J. O'Neill22, R. Poling22, T. Riehle22, A. Smith22, J. Urheim22, S. Ahmed23, M. S. Alam23, S. B. Athar23, L. Jian23, L. Ling23, A. H. Mahmood23,§, M. Saleem23, S. Timm23, F. Wappler23, A. Anastassov24, J. E. Duboscq24, K. K. Gan24, C. Gwon24, T. Hart24, K. Honscheid24, D. Hufnagel24, H. Kagan24, R. Kass24, J. Lorenc24, T. K. Pedlar24, H. Schwarthoff24, E. von Toerne24, M. M. Zoeller24, S. J. Richichi25, H. Severini25, P. Skubic25, A. Undrus25, S. Chen26, J. Fast26, J. W. Hinson26, J. Lee26, N. Menon26, D. H. Miller26, E. I. Shibata26, I. P. J. Shipsey26, and V. Pavlunin26 (CLEO Collaboration)
1University of Rochester, Rochester, New York 14627
2Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
3Southern Methodist University, Dallas, Texas 75275
4Syracuse University, Syracuse, New York 13244
5Vanderbilt University, Nashville, Tennessee 37235
6Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
7Wayne State University, Detroit, Michigan 48202
8California Institute of Technology, Pasadena, California 91125
9University of California, San Diego, La Jolla, California 92093
10University of California, Santa Barbara, California 93106
11Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
12University of Colorado, Boulder, Colorado 80309-0390
13Cornell University, Ithaca, New York 14853
14University of Florida, Gainesville, Florida 32611
15Harvard University, Cambridge, Massachusetts 02138
16University of Hawaii at Manoa, Honolulu, Hawaii 96822
17University of Illinois, Urbana-Champaign, Illinois 61801
18aCarleton University, Ottawa, Ontario, Canada K1S 5B6
18band the Institute of Particle Physics, Canada
19aMcGill University, Montréal, Québec, Canada H3A 2T8
19band the Institute of Particle Physics, Canada
20Ithaca College, Ithaca, New York 14850
21University of Kansas, Lawrence, Kansas 66045
22University of Minnesota, Minneapolis, Minnesota 55455
23State University of New York at Albany, Albany, New York 12222
24The Ohio State University, Columbus, Ohio 43210
25University of Oklahoma, Norman, Oklahoma 73019
26Purdue University, West Lafayette, Indiana 47907
Received 27 December 1999; published in the issue dated 17 July 2000
We have studied charmless hadronic decays of B mesons into two-body final states with kaons and pions and observe three new processes with the following branching fractions: B(B→π+π-) = (4.3-1.4+1.6±0.5)×10-6, B(B→K0π0) = (14.6-5.1-3.3+5.9+2.4)×10-6, and B(B→K±π0) = (11.6-2.7-1.3+3.0+1.4)×10-6. We also update our previous measurements for the decays B→K±π∓ and B±→K0π±.
© 2000 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.515
DOI:
10.1103/PhysRevLett.85.515
*Permanent address: Yonsei University, Seoul 120-749, Korea. †Permanent address: University of Cincinnati, Cincinnati, OH 45221. ‡Permanent address: Massachusetts Institute of Technology, Cambridge, MA 02139. §Permanent address: University of Texas–Pan American, Edinburg, TX 78539.
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