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. 2001 Dec 17;87(25):251801.
doi: 10.1103/PhysRevLett.87.251801. Epub 2001 Nov 28.

First measurement of gamma(D*(+))

S Ahmed  1 , M S Alam, S B Athar, L Jian, L Ling, M Saleem, S Timm, F Wappler, A Anastassov, E Eckhart, K K Gan, C Gwon, T Hart, K Honscheid, D Hufnagel, H Kagan, R Kass, T K Pedlar, J B Thayer, E von Toerne, M M Zoeller, S J Richichi, H Severini, P Skubic, A Undrus, V Savinov, S Chen, J W Hinson, J Lee, D H Miller, E I Shibata, I P Shipsey, V Pavlunin, D Cronin-Hennessy, A L Lyon, W Park, E H Thorndike, T E Coan, Y S Gao, Y Maravin, I Narsky, R Stroynowski, J Ye, T Wlodek, M Artuso, K Benslama, C Boulahouache, K Bukin, E Dambasuren, G Majumder, R Mountain, T Skwarnicki, S Stone, J C Wang, A Wolf, S Kopp, M Kostin, A H Mahmood, S E Csorna, I Danko, V Jain, K W McLean, Z Xu, R Godang, G Bonvicini, D Cinabro, M Dubrovin, S McGee, A Bornheim, E Lipeles, S P Pappas, A Shapiro, W M Sun, A J Weinstein, D E Jaffe, R Mahapatra, G Masek, H P Paar, A Eppich, T S Hill, R J Morrison, H N Nelson, R A Briere, G P Chen, T Ferguson, H Vogel, J P Alexander, C Bebek, B E Berger, K Berkelman, F Blanc, V Boisvert, D G Cassel, P S Drell, J E Duboscq, K M Ecklund, R Ehrlich, P Gaidarev, L Gibbons, B Gittelman, S W Gray, D L Hartill, B K Heltsley, L Hsu, C D Jones, J Kandaswamy, D L Kreinick, M Lohner, A Magerkurth, H Mahlke-Krüger, T O Meyer, N B Mistry, E Nordberg, M Palmer, J R Patterson, D Peterson, D Riley, A Romano, H Schwarthoff, J G Thayer, D Urner, B Valant-Spaight, G Viehhauser, A Warburton, P Avery, C Prescott, A I Rubiera, H Stoeck, J Yelton, G Brandenburg, A Ershov, D Y Kim, R Wilson, B I Eisenstein, J Ernst, G E Gladding, G D Gollin, R M Hans, E Johnson, I Karliner, M A Marsh, C Plager, C Sedlack, M Selen, J J Thaler, J Williams, K W Edwards, A J Sadoff, R Ammar, A Bean, D Besson, X Zhao, S Anderson, V V Frolov, Y Kubota, S J Lee, R Poling, A Smith, C J Stepaniak, J Urheim; CLEO Collaboration
Affiliations

First measurement of gamma(D*(+))

S Ahmed et al. Phys Rev Lett. .

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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