First measurement of gamma(D*(+)).

S Ahmed,R Mahapatra,M Dubrovin,I Narsky,V Savinov,C Gwon,D Cronin-Hennessy,W Park,K Bukin,K Honscheid,A Anastassov,C Boulahouache,R Godang,P Skubic,R Mountain,D Cinabro,M Kostin,G Bonvicini,G Masek,V Pavlunin,E Dambasuren,T Hart,H Kagan,A Bornheim,A Eppich,K Benslama,E Von Toerne,T Skwarnicki,S P Pappas ,S Timm,D H Miller ,W Sun,J B Thayer ,S B Athar ,J W Hinson ,J C Wang ,E Lipeles,K W Mclean ,S Köpp ,T K Pedlar ,H P Paar ,K K Gan ,A J Weinstein ,D E Jaffe ,D Hufnage ,A H Mahmood ,S J Richichi ,Y S Gao ,S Stone,M Saleem,I P J Shipsey ,E I Shibata ,Z Xu,A Shapiro,Jhinhwan Lee ,V Jain,A L Lyon ,A Wolf,M S Alam ,S E Csorna ,Steven Mcgee ,F R Wappler ,R Kass,T Włodek ,T S Hill ,H Severini,S Chen,R Stroynowski,G Majumder,Y Maravin,I Dankó ,M M Zoeller ,A Undrus,E H Thorndike ,E A Eckhart ,J Ye,M Artuso,T E Coan ,R J Morrison ,L Jian,Ling Liu ,H N Nelson

doi:10.1103/physrevlett.87.251801

First measurement of gamma(D*(+)).

S Ahmed, R Mahapatra + Show 80 more

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https://doi.org/10.1103/physrevlett.87.251801

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Journal: Physical Review Letters	Publication Date: Nov 1, 2001
Citations: 108

Affiliation: University at Albany, State University of New York, University of California, San Diego, University of Rochester, The University of Texas at Austin, McGill University, University of Kansas, The Ohio State University, Vanderbilt University, University of Oklahoma, University of Pittsburgh, Purdue University West Lafayette, University of California, Santa Barbara, Carleton University, Virginia Tech, Syracuse University, Cornell University

#Size Of Beam Spot #Reconstruction Method + 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 Cornell Electron-positron Storage Ring beam spot to measure the energy release distribution from the D*(+)-->D(0)pi(+) decay. We find gamma(D*(+)) = 96+/-4 (stat)+/-22 (syst) keV. We also measure the energy release in the decay and compute Delta m identical with m(D*(+))-m(D(0)) = 145.412+/-0.002 (stat)+/-0.012 (syst) MeV/c(2).

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