Measurement of masses and widths of excited charm mesons D and evidence for broad states

• DOI: 10.1016/j.physletb.2004.02.017
• Publication Date: 2004-03-07T05:08:19Z
• Authors: J.M. Link; P.M. Yager; J.C. Anjos; I. Bediaga; C. Göbel; A.A. Machado; J. Magnin; A. Massafferri; J.M. de Miranda; I.M. Pepe; E. Polycarpo; A.C. dos Reis; S. Carrillo; E. Casimiro; E. Cuautle; A. Sánchez-Hernández; C. Uribe; F. Vázquez; L. Agostino; L. Cinquini; J.P. Cumalat; B. O'Reilly; I. Segoni; M. Wahl; J.N. Butler; H.W.K. Cheung; G. Chiodini; I. Gaines; P.H. Garbincius; L.A. Garren; E. Gottschalk; P.H. Kasper; A.E. Kreymer; R. Kutschke; M. Wang; L. Benussi; M. Bertani; S. Bianco; F.L. Fabbri; A. Zallo; M. Reyes; C. Cawlfield; D.Y. Kim; A. Rahimi; J. Wiss; R. Gardner; A. Kryemadhi; Y.S. Chung; J.S. Kang; B.R. Ko; J.W. Kwak; K.B. Lee; K. Cho; H. Park; G. Alimonti; S. Barberis; M. Boschini; A. Cerutti; P. D'Angelo; M. DiCorato; P. Dini; L. Edera; S. Erba; M. Giammarchi; P. Inzani; F. Leveraro; S. Malvezzi; D. Menasce; M. Mezzadri; L. Moroni; D. Pedrini; C. Pontoglio; F. Prelz; M. Rovere; S. Sala; T.F. Davenport; V. Arena; G. Boca; G. Bonomi; G. Gianini; G. Liguori; M.M. Merlo; D. Pantea; D. Lopes Pegna; S.P. Ratti; C. Riccardi; P. Vitulo; H. Hernandez; A.M. Lopez; E. Luiggi; H. Mendez; A. Paris; J.E. Ramirez; Y. Zhang; J.R. Wilson; T. Handler; R. Mitchell; D. Engh; M. Hosack; W.E. Johns; M. Nehring; P.D. Sheldon; K. Stenson; E.W. Vaandering; M. Webster; M. Sheaff
• Keywords: Nuclear and High Energy Physics; charmed meson; FOS: Physical sciences; (D0 pi+); D*2(2460); 01 natural sciences; High Energy Physics - Experiment; mass spectrum; (D+ pi-); High Energy Physics - Experiment (hep-ex); excited state; 0103 physical sciences; ma; hadronic decay; article; mass; mathematical computing; measurement; meson; structure analysis; experimental result; beryllium; magnetic spectrometer; photon nucleu; width; inclusive reaction; oxygen; photoproduction; Batavia TEVATRON PS

Using data from the FOCUS experiment we analyze $D^+π^-$ and $D^0π^+$ invariant mass distributions. We measure $D_2^{*0}$ $M_{D_2^{*0}} = (2464.5 \pm 1.1 1.9) \mev$ width $Γ_{D_2^{*0}} (38.7 5.3 2.9) \mev$, $D_2^{*+}$ $ M_{D_2^{*+}} (2467.6 1.5 0.76) Γ_{D_2^{*+}} (34.1 6.5 4.2) \mev$. find evidence for broad structures over background in both neutral charged final state. If each is interpreted as a single L=1, $j_q=1/2$ excited charm meson resonance, masses widths are $M_{1/2}^0 =(2407 21 35) $Γ_{1/2}^0 (240 55 59) $M_{1/2}^+ (2403 14 $Γ_{1/2}^+ (283 24 34) respectively.