Phys. Rev. Lett.
88,
161801
(2002)
[5 pages]
A High Statistics Measurement of the Λc+ Lifetime
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. Massafferi2, J. M. de Miranda2, I. M. Pepe2, A. C. dos Reis2, S. Carrillo3, E. Casimiro3, E. Cuautle3, A. Sánchez-Hernández3, C. Uribe3, F. Vazquez3, L. Agostino4, L. Cinquini4, J. P. Cumalat4, B. O'Reilly4, J. E. Ramirez4, I. Segoni4, 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, V. Arena12, G. Boca12, G. Bonomi12, G. Gianini12, G. Liguori12, M. M. Merlo12, D. Pantea12, S. P. Ratti12, C. Riccardi12, P. Vitulo12, H. Hernandez13, A. M. Lopez13, E. Luiggi13, 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, E. W. Vaandering16, M. Webster16, and M. Sheaff17 (FOCUS Collaboration)
1University of California, Davis, California 95616
2Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, RJ, Brazil
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
Received 31 January 2002; published 8 April 2002
A high statistics measurement of the Λc+ lifetime from the Fermilab fixed-target FOCUS photoproduction experiment is presented. We describe the analysis technique with particular attention to the determination of the systematic uncertainty. The measured value of 204.6±3.4 (stat)±2.5 (syst)fs from 8034±122Λc+→pK-π+ decays represents a significant improvement over the present world average.
© 2002 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.161801
DOI:
10.1103/PhysRevLett.88.161801
PACS:
13.30.Eg, 14.20.Lq, 14.65.Dw
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