Phys. Rev. Lett.
88,
041602
(2002)
[4 pages]
Search for CP Violation in the decays D+→KSπ+ and D+→KSK+
J. M. Link et al. (FOCUS Collaboration)
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J. M. Link1, M. Reyes1, P. M. Yager1, J. C. Anjos2, I. Bediaga2, C. Göbel2, J. Magnin2, A. Massafferri2, J. M. de Miranda2, I. M. Pepe2, A. C. dos Reis2, S. Carrillo3, E. Casimiro3, A. Sánchez-Hernández3, C. Uribe3, F. Vázquez3, L. Cinquini4, J. P. Cumalat4, B. O'Reilly4, J. E. Ramirez4, E. W. Vaandering4, J. N. Butler5, H. W. K. Cheung5, I. Gaines5, P. H. Garbincius5, L. A. Garren5, E. Gottschalk5, P. H. Kasper5, A. E. Kreymer5, R. Kutschke5, S. Bianco6, F. L. Fabbri6, A. Zallo6, C. Cawlfield7, D. Y. Kim7, A. Rahimi7, J. Wiss7, R. Gardner8, A. Kryemadhi8, Y. S. Chung9, J. S. Kang9, B. R. Ko9, J. W. Kwak9, K. B. Lee9, H. Park9, G. Alimonti10, M. Boschini10, P. D'Angelo10, M. DiCorato10, P. Dini10, M. Giammarchi10, P. Inzani10, F. Leveraro10, S. Malvezzi10, D. Menasce10, M. Mezzadri10, L. Milazzo10, L. Moroni10, D. Pedrini10, C. Pontoglio10, F. Prelz10, M. Rovere10, S. Sala10, T. F. Davenport, III11, L. Agostino12, V. Arena12, G. Boca12, G. Bonomi12, G. Gianini12, G. Liguori12, M. M. Merlo12, D. Pantea12, S. P. Ratti12, C. Riccardi12, I. Segoni12, P. Vitulo12, H. Hernandez13, A. M. Lopez13, H. Mendez13, L. Mendez13, A. Mirles13, E. Montiel13, D. Olaya13, A. Paris13, J. Quinones13, C. Rivera13, W. Xiong13, Y. Zhang13, J. R. Wilson14, K. Cho15, T. Handler15, R. Mitchell15, D. Engh16, M. Hosack16, W. E. Johns16, M. Nehring16, P. D. Sheldon16, K. Stenson16, M. Webster16, and M. Sheaff17,*,† (FOCUS Collaboration)
1University of California, Davis, California 95616
2Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, RJ, Brasil
3CINVESTAV, 07000, México City, DF, Mexico
4University of Colorado, Boulder, Colorado 80309
5Fermi National Accelerator Laboratory, Batavia, Illinois 60510
6Laboratori Nazionali di Frascati dell'INFN, Frascati, Italy I-00044
7University of Illinois, Urbana-Champaign, Illinois 61801
8Indiana University, Bloomington, Indiana 47405
9Korea University, Seoul, Korea 136-701
10INFN and University of Milano, Milano, Italy
11University of North Carolina, Asheville, North Carolina 28804
12Dipartimento di Fisica Nucleare e Teorica and INFN, Pavia, Italy
13University of Puerto Rico, Mayaguez, Puerto Rico 00681
14University of South Carolina, Columbia, South Carolina 29208
15University of Tennessee, Knoxville, Tennessee 37996
16Vanderbilt University, Nashville, Tennessee 37235
17University of Wisconsin, Madison, Wisconsin 53706
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Erratum
Received 17 September 2001; published 14 January 2002
A high-statistics sample of photoproduced charm from the FOCUS experiment has been used to search for direct CP violation in the decay rates for D+→KSπ+ and D+→KSK+. We have measured the following asymmetry parameters relative to D+→K-π+π+: ACP(KSπ+) = (-1.6±1.5±0.9)%, ACP(KSK+) = (+6.9±6.0±1.5)%, and ACP(KSK+) = (+7.1±6.1±1.2)% relative to D+→KSπ+. We have also measured the relative branching ratios and found Γ(D+→K̅ 0π+)/Γ(D+→K-π+π+) = (30.60±0.46±0.32)%, Γ(D+→K̅ 0K+)/Γ(D+→K-π+π+) = (6.04±0.35±0.30)%, and Γ(D+→K̅ 0K+)/Γ(D+→K̅ 0π+) = (19.96±1.19±0.96)%.
© 2002 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.041602
DOI:
10.1103/PhysRevLett.88.041602
PACS:
11.30.Er, 13.20.Fc, 14.40.Lb
* †Electronic address: http://www-focus.fnal.gov/authors.html
See Also
Erratum:
J. M. Link et al. (FOCUS Collaboration),
Erratum: Search for CP Violation in the Decays D+→KSπ+ and D+→KSK+[Phys. Rev. Lett. 88, 041602 (2002)],
Phys. Rev. Lett. 88, 159903 (2002).
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