A Caltech Library Service

Direct Measurement of the Pseudoscalar Decay Constant, f_D_s

Bai, J. Z. and Hatanaka, M. and Hitlin, D. G. and Jones, L. and Kelsey, M. H. and Oyang, J. and Panetta, J. and Porter, F. and Prabhakar, E. (1995) Direct Measurement of the Pseudoscalar Decay Constant, f_D_s. Physical Review Letters, 74 (23). pp. 4599-4602. ISSN 0031-9007. doi:10.1103/PhysRevLett.74.4599.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


The Beijing Spectrometer (BES) experiment has observed purely leptonic decays of the D_s meson in the reaction e^+e^-→D_s^+D_s^- at a c.m. energy of 4.03 GeV. Three events are observed in which one D_s decays hadronically to φπ, K̅ ^(*0)K, or K̅^0K, and the other decays leptonically to μν_μ or τν_τ. With the assumption of μ-τ universality, values of the branching fraction, B(D_s→μν_μ) = (1.5_(-0.6-0.2)^(+1.3+0.3))%, and the D_s pseudoscalar decay constant, f_D_s = (4.3_(-1.3-0.4)^(+1.5+0.4))×10^2 MeV, are obtained.

Item Type:Article
Related URLs:
URLURL TypeDescription
Hitlin, D. G.0000-0003-4028-6982
Porter, F.0000-0003-1948-8889
Additional Information:© 1995 The American Physical Society. Received 22 December 1994; published in the issue dated 5 June 1995. We would like to thank the staffs of the BEPC accelerator, the Computing Center at the Institute of High Energy Physics (Beijing), and the Texas High Performance Computing Center. We thank Professor Chaohsi Chang for useful discussions of Ds physics. Work supported in part by the National Natural Science Foundation of China under Contract No. 19290400 and the Chinese Academy of Sciences under Contract No. KJ85 (IHEP); by the Department of Energy under Contract No. DE-FG02-91ER40676 (Boston University), No. DE-FG03-92ER40701 (Caltech), No. DE-FG03- 93ER40788 (Colorado State University), No. DE-AC02- 76ER03069 (MIT), No. DE-AC03-76SF00515 (SLAC), No. DE-FG03-91ER40679 (UC Irvine), No. DE-FG03- 94ER40833 (U Hawaii), No. DE-FG05-92ER40736 (UT Dallas), and No. DE-AC35-89ER40486 (SSC Lab); by the U.S. National Science Foundation, Grant No. PHY9203212 (University of Washington); and by the Texas National Research Laboratory Commission under Contract No. RGFY91B5, No. RGFY92B5 (Colorado State), and No. RCFY93-316H (UT Dallas).
Funding AgencyGrant Number
National Natural Science Foundation of China19290400
Chinese Academy of SciencesKJ85
Department of Energy (DOE)DE-FG02-91ER40676
Department of Energy (DOE)DE-FG03-92ER40701
Department of Energy (DOE)DE-FG03-93ER40788
Department of Energy (DOE)DE-AC02-76ER03069
Department of Energy (DOE)DE-AC03-76SF00515
Department of Energy (DOE)DE-FG03-91ER40679
Department of Energy (DOE)DE-FG03-94ER40833
Department of Energy (DOE)DE-FG05-92ER40736
Department of Energy (DOE)DE-AC35-89ER40486
Texas National Research Laboratory CommissionRGFY91B5
Texas National Research Laboratory CommissionRGFY92B5
Texas National Research Laboratory CommissionRCFY93-316H
Issue or Number:23
Classification Code:PACS: 13.20.Fc, 14.40.Lb
Record Number:CaltechAUTHORS:20120215-145754333
Persistent URL:
Official Citation:Direct Measurement of the Pseudoscalar Decay Constant, fDs J. Z. Bai et al. (BES Collaboration) pp. 4599-4602
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:29312
Deposited By: Ruth Sustaita
Deposited On:15 Feb 2012 23:30
Last Modified:09 Nov 2021 17:05

Repository Staff Only: item control page