ITA
ENG

Measurement of the Ds lifetime

Authors

Aitala, EM Amato, S Anjos, JC Appel, JA Ashery, D Banerjee, S Bediaga, I Blaylock, G Bracker, SB Burchat, PR Burnstein, RA Carter, T Carvalho, HS Copty, NK Cremaldi, LM Darling, C Denisenko, K Fernandez, A Fox, GF Gagnon, P Gobel, C Gounder, K Halling, AM Herrera, G Hurvits, G James, C Kasper, PA Kwan, S Langs, DC Leslie, J Lundberg, B MayTal-Beck, S Meadows, B Neto, JRTD Mihalcea, D Milburn, RH de Miranda, JM Napier, A Nguyen, A d'Oliveira, AB O'Shaughnessy, K Peng, KC Perera, LP Purohit, MV Quinn, B Radeztsky, S Rafatian, A Reay, NW Reidy, JJ dos Reis, AC Rubin, HA Sanders, DA Santha, AKS Santoro, AFS Schwartz, AJ Sheaff, M Sidwell, RA Slaughter, AJ Sokoloff, MD Solano, J Stanton, NR Stefanski, RJ Stenson, K Summers, DJ Takach, S Thorne, K Tripathi, AK Watanabe, S Weiss-Babai, R Wiener, J Witchey, N Wolin, E Yang, SM Yi, D Yoshida, S Zaliznyak, R Zhang, C

Citation

Em. Aitala et al., Measurement of the Ds lifetime, PHYS LETT B, 445(3-4), 1999, pp. 449-454

Citations number

Categorie Soggetti

Physics

Journal title

PHYSICS LETTERS B

ISSN journal

03702693 → ACNP

Volume

445

Issue

3-4

Year of publication

1999

Pages

449 - 454

Database

ISI

SICI code

0370-2693(19990107)445:3-4<449:MOTDL>2.0.ZU;2-A

Abstract

We report the results of a precise measurement of the D-s meson lifetime ba sed on 1662 +/- 56 fully reconstructed D-s --> phi pi decays, from the char m hadroproduction experiment E791 at Fermilab. Using an unbinned maximum li kelihood fit, we measure the D-s lifetime to be 0.518 +/- 0.014 +/- 0.007 p s. The ratio of the measured D-s lifetime to the world average D-0 lifetime [1] is 1.25 +/- 0.04. This result differs from unity by six standard devia tions, indicating significantly different lifetimes for the D-s and the D-0 . (C) 1999 Elsevier Science B.V. All rights reserved.