Phys. Rev. D
55,
7291–7295
(1997)
ντ helicity from h± energy correlations
T. E. Coan et al.
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T. E. Coan1, V. Fadeyev1, I. Korolkov1, Y. Maravin1, I. Narsky1, V. Shelkov1, J. Staeck1, R. Stroynowski1, I. Volobouev1, J. Ye1, M. Artuso2, A. Efimov2, F. Frasconi2, M. Gao2, M. Goldberg2, D. He2, S. Kopp2, G. C. Moneti2, R. Mountain2, S. Schuh2, T. Skwarnicki2, S. Stone2, G. Viehhauser2, X. Xing2, J. Bartelt3, S. E. Csorna3, V. Jain3, S. Marka3, A. Freyberger4, R. Godang4, K. Kinoshita4, I. C. Lai4, P. Pomianowski4, S. Schrenk4, G. Bonvicini5, D. Cinabro5, R. Greene5, L. P. Perera5, G. J. Zhou5, B. Barish6, M. Chadha6, S. Chan6, G. Eigen6, J. S. Miller6, C. O’Grady6, M. Schmidtler6, J. Urheim6, A. J. Weinstein6, F. Würthwein6, D. M. Asner7, D. W. Bliss7, W. S. Brower7, G. Masek7, H. P. Paar7, V. Sharma7, J. Gronberg8, T. S. Hill8, R. Kutschke8, D. J. Lange8, S. Menary8, R. J. Morrison8, H. N. Nelson8, T. K. Nelson8, C. Qiao8, J. D. Richman8, D. Roberts8, A. Ryd8, M. S. Witherell8, R. Balest9, B. H. Behrens9, K. Cho9, W. T. Ford9, H. Park9, P. Rankin9, J. Roy9, J. G. Smith9, J. P. Alexander10, C. Bebek10, B. E. Berger10, K. Berkelman10, K. Bloom10, D. G. Cassel10, H. A. Cho10, D. M. Coffman10, D. S. Crowcroft10, M. Dickson10, P. S. Drell10, K. M. Ecklund10, R. Ehrlich10, R. Elia10, A. D. Foland10, P. Gaidarev10, R. S. Galik10, B. Gittelman10, S. W. Gray10, D. L. Hartill10, B. K. Heltsley10, P. I. Hopman10, J. Kandaswamy10, N. Katayama10, P. C. Kim10, D. L. Kreinick10, T. Lee10, Y. Liu10, G. S. Ludwig10, J. Masui10, J. Mevissen10, N. B. Mistry10, C. R. Ng10, E. Nordberg10, M. Ogg10, J. R. Patterson10, D. Peterson10, D. Riley10, A. Soffer10, C. Ward10, M. Athanas11, P. Avery11, C. D. Jones11, M. Lohner11, C. Prescott11, J. Yelton11, J. Zheng11, G. Brandenburg12, R. A. Briere12, Y. S. Gao12, D. Y.-J. Kim12, R. Wilson12, H. Yamamoto12, T. E. Browder13, F. Li13, Y. Li13, J. L. Rodriguez13, T. Bergfeld14, B. I. Eisenstein14, J. Ernst14, G. E. Gladding14, G. D. Gollin14, R. M. Hans14, E. Johnson14, I. Karliner14, M. A. Marsh14, M. Palmer14, M. Selen14, J. J. Thaler14, K. W. Edwards15, A. Bellerive16, R. Janicek16, D. B. MacFarlane16, K. W. McLean16, P. M. Patel16, A. J. Sadoff17, R. Ammar18, P. Baringer18, A. Bean18, D. Besson18, D. Coppage18, C. Darling18, R. Davis18, N. Hancock18, S. Kotov18, I. Kravchenko18, N. Kwak18, S. Anderson19, Y. Kubota19, M. Lattery19, S. J. Lee19, J. J. O’Neill19, S. Patton19, R. Poling19, T. Riehle19, V. Savinov19, A. Smith19, M. S. Alam20, S. B. Athar20, Z. Ling20, A. H. Mahmood20, H. Severini20, S. Timm20, F. Wappler20, A. Anastassov21, S. Blinov21, J. E. Duboscq21, K. D. Fisher21, D. Fujino21, R. Fulton21, K. K. Gan21, T. Hart21, K. Honscheid21, H. Kagan21, R. Kass21, J. Lee21, M. B. Spencer21, M. Sung21, A. Undrus21, R. Wanke21, A. Wolf21, M. M. Zoeller21, B. Nemati22, S. J. Richichi22, W. R. Ross22, P. Skubic22, M. Wood22, M. Bishai23, J. Fast23, E. Gerndt23, J. W. Hinson23, N. Menon23, D. H. Miller23, E. I. Shibata23, I. P. J. Shipsey23, M. Yurko23, L. Gibbons24, S. D. Johnson24, Y. Kwon24, S. Roberts24, E. H. Thorndike24, C. P. Jessop25, K. Lingel25, H. Marsiske25, M. L. Perl25, S. F. Schaffner25, D. Ugolini25, R. Wang25, and X. Zhou25
1Southern Methodist University, Dallas, Texas 75275
2Syracuse University, Syracuse, New York 13244
3Vanderbilt University, Nashville, Tennessee 37235
4Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
5Wayne State University, Detroit, Michigan 48202
6California Institute of Technology, Pasadena, California 91125
7University of California, San Diego, La Jolla, California 92093
8University of California, Santa Barbara, California 93106
9University of Colorado, Boulder, Colorado 80309-0390
10Cornell University, Ithaca, New York 14853
11University of Florida, Gainesville, Florida 32611
12Harvard University, Cambridge, Massachusetts 02138
13University of Hawaii at Manoa, Honolulu, Hawaii 96822
14University of Illinois, Champaign-Urbana, Illinois 61801
15Carleton University, Ottawa, Ontario, Canada K1S 5B6
the Institute of Particle Physics, Canada
16McGill University, Montréal, Québec, Canada H3A 2T8
the Institute of Particle Physics, Canada
17Ithaca College, Ithaca, New York 14850
18University of Kansas, Lawrence, Kansas 66045
19University of Minnesota, Minneapolis, Minnesota 55455
20State University of New York at Albany, Albany, New York 12222
21Ohio State University, Columbus, Ohio 43210
22University of Oklahoma, Norman, Oklahoma 73019
23Purdue University, West Lafayette, Indiana 47907
24University of Rochester, Rochester, New York 14627
25Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
Received 22 January 1997; published in the issue dated 1 June 1997
We report a measurement of the magnitude of the ντ helicity from τ-pair events taken with the CLEO detector at the CESR electron-positron storage ring. Events in which each τ undergoes the decay τ→hν, with h a charged pion or kaon, are analyzed for energy correlations between the daughter hadrons, yielding |ξh| = 1.03±0.06±0.04, with the first error statistical and the second systematic.
© 1997 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.55.7291
DOI:
10.1103/PhysRevD.55.7291
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