First measurement of gamma(D(+))

• Published in: Physical review letters Vol. 87; no. 25; p. 251801
• Main Authors: Ahmed, S, Alam, M S, Athar, S B, Jian, L, Ling, L, Saleem, M, Timm, S, Wappler, F, Anastassov, A, Eckhart, E, Gan, K K, Gwon, C, Hart, T, Honscheid, K, Hufnagel, D, Kagan, H, Kass, R, Pedlar, T K, Thayer, J B, von Toerne, E, Zoeller, M M, Richichi, S J, Severini, H, Skubic, P, Undrus, A, Savinov, V, Chen, S, Hinson, J W, Lee, J, Miller, D H, Shibata, E I, Shipsey, I P, Pavlunin, V, Cronin-Hennessy, D, Lyon, A L, Park, W, Thorndike, E H, Coan, T E, Gao, Y S, Maravin, Y, Narsky, I, Stroynowski, R, Ye, J, Wlodek, T, Artuso, M, Benslama, K, Boulahouache, C, Bukin, K, Dambasuren, E, Majumder, G, Mountain, R, Skwarnicki, T, Stone, S, Wang, J C, Wolf, A, Kopp, S, Kostin, M, Mahmood, A H, Csorna, S E, Danko, I, Jain, V, McLean, K W, Xu, Z, Godang, R, Bonvicini, G, Cinabro, D, Dubrovin, M, McGee, S, Bornheim, A, Lipeles, E, Pappas, S P, Shapiro, A, Sun, W M, Weinstein, A J, Jaffe, D E, Mahapatra, R, Masek, G, Paar, H P, Eppich, A, Hill, T S, Morrison, R J, Nelson, H N, Briere, R A, Chen, G P, Ferguson, T, Vogel, H, Alexander, J P, Bebek, C, Berger, B E, Berkelman, K, Blanc, F, Boisvert, V, Cassel, D G, Drell, P S, Duboscq, J E, Ecklund, K M, Ehrlich, R, Gaidarev, P, Gibbons, L, Gittelman, B
• Format: Journal Article
• Language: English
• Published: United States 17-12-2001
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.87.251801

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).