First measurement ofΓ(D*+)and precision measurement ofmD*+−mD0

A Anastassov,R Stroynowski,H Severini,B E Berger,A Shapiro,A Bornheim,J Lee,R A Briere,K Benslama,K K Gan,G P Chen,M Dubrovin,H Vogel,K Honscheid,V Boisvert,I Narsky,P Skubic,E Dambasuren,A H Mahmood,D H Miller,D Cinabro,S P Pappas,F Blanc,H Kagan,I P J Shipsey,J B Thayer,L Hsu,C Bebek,M M Zoeller,S J Richichi,D Hufnagel,R Mountain,L Gibbons,T Hart,D L Kreinick,J C Wang,D G Cassel,C D Jones,P S Drell,A L Lyon,M Artuso,V Jain,B K Heltsley,D L Hartill,J E Duboscq,D E Jaffe,A Wolf,R Godang,R J Morrison,T Skwarnicki,A Undrus,Y Maravin,K W Mclean,H N Nelson,W Park,S E Csorna,D Cronin-Hennessy,R Mahapatra,E I Shibata,T Ferguson,V Savinov,V Pavlunin,G Bonvicini,A Eppich,B Gittelman,J W Hinson,S Stone,S W Gray,M Kostin,T E Coan,T S Hill,Y S Gao,S Chen,Z Xu,K M Ecklund,E Von Toerne,R Kass,K Berkelman,E Lipeles,E H Thorndike,T K Pedlar,A J Weinstein,R Ehrlich,J Kandaswamy,K Bukin,H P Paar,G Masek,C Gwon,G Majumder,C Boulahouache,P Gaidarev,J Ye,J Alexander ,E A Eckhart ,W Sun ,I Dankó ,T Włodek ,Steven Mcgee ,S Köpp

doi:10.1103/physrevd.65.032003

First measurement ofΓ(D+)and precision measurement ofmD+−mD0

A Anastassov, R Stroynowski + Show 97 more

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https://doi.org/10.1103/physrevd.65.032003

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Journal: Physical Review D	Publication Date: Jan 10, 2002
Citations: 156

Affiliation: The Ohio State University, Cornell University, California Institute of Technology, Carnegie Mellon University, Syracuse University, Wayne State University, Southern Methodist University, University of Oklahoma, University of Rochester, Virginia Tech, University of California, Santa Barbara, Vanderbilt University, University of California, San Diego, Purdue University West Lafayette, University of Pittsburgh, The University of Texas at Austin

#D0 Pi #Size Of Beam Spot + Show 8 more

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Abstract

We present the first measurement of the D*+ width using 9/fb of e+ e- data collected near the Upsilon(4S) resonance by the CLEO II.V detector. Our method uses advanced tracking techniques and a reconstruction method that takes advantage of the small vertical size of the CESR beam spot to measure the energy release distribution from the D*+ -> D0 pi+ decay. We find Gamma(D*+) = 96 +- 4 (Statistical) +- 22 (Systematic) keV. We also measure the energy release in the decay and compute Delta m = m(D*+) - m(D0) = 145.412 +- 0.002 (Statistical) +- 0.012 (Systematic) MeV/c^2

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