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Measurement of the K S mean lifetime from π+π− and π0π0 decays using K L decays to determine the acceptance |
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| Authors: | L. Bertanza A. Bigi P. Calafiura M. Calvetti R. Carosi M. C. Carrozza R. Casali C. Cerri R. Fantechi I. Mannelli V. M. Marzulli A. Nappi G. M. Pierazzini L. Tassi G. D. Barr P. Buchholz D. Coward D. Cundy N. Doble L. Gatignon P. Grafström R. Hagelberg H. Wahl K. J. Peach T. Beier H. Blümer R. Heinz K. Kleinknecht B. Panzer-Steinde B. Renk H. Rohrer J. Scheidt J. Staeck A. Wagner E. Augé D. Fournier L. Iconomidou-Fayard O. Perdereau A. C. Schaffer L. Serin M. Holder A. Kreutz R. Werthenbach |
| Affiliation: | 1. Dipartimento di Fisica, Scuola Normale Superiore e Sezione INFN, I-56100, Pisa, Italy 2. CERN, CH-1211, Geneva 23, Switzerland 3. Physics Department, University of Edinburgh, Edinburgh, EH9 3JZ, UK 4. Institut für Physik, Universit?t Mainz, D-55099, Mainz, Germany 5. Laboratoire de l’Accelérateur Linéaire, IN2P3-CNRS, Université de Paris-Sud, F-91406, Orsay, France 6. Dipartimento di Fisica e Sezione INFN, I-06100, Perugia, Italy |
| Abstract: | A precision measurement of the K S mean lifetime has been performed by comparing, in the same experimental setup, the distributions of two-pion decays of neutral kaons produced by high energy proton-beryllium interactions in two targets at a relative distance variable between 112 and 160 m. The value obtained combining the results from π+π? and π0π0 decays is τs = (0.8971 ± 0.0021) 10?10 s. |
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