Authors

D. Besson
S. Anderson
V. V. Frolov
D. T. Gong
Y. Kubota
S. Z. Li
R. Poling
A. Smith
C. J. Stepaniak
J. Urheim
Z. Metreveli
K. K. Seth
A. Tomaradze
P. Zweber
K. Arms
E. Eckhart
K. K. Gan
C. Gwon
T. K. Pedlar
E. von Toerne
H. Severini
P. Skubic
S. A. Dytman
J. A. Mueller
S. Nam
V. Savinov
J. W. Hinson
G. S. Huang
J. Lee
D. H. Miller
V. Pavlunin
B. Sanghi
E. I. Shibata
I. P. J. Shipsey
D. Cronin-Hennessy
C. S. Park
W. Park
J. B. Thayer
E. H. Thorndike
T. E. Coan
Y. S. Gao
F. Liu
R. Stroynowski
M. Artuso
C. Boulahouache
S. Blusk
E. Dambasuren
O. Dorjkhaidav
R. Mountain
H. Muramatsu
R. Nandakumar
T. Skwarnicki
S. Stone
J. C. Wang
A. H. Mahmood
S. E. Csorna
I. Danko
G. Bonvicini
D. Cinabro
M. Dubrovin
S. McGee
A. Bornheim
E. Lipeles
S. P. Pappas
A. Shapiro
W. M. Sun
A. J. Weinstein
R. A. Briere
G. P. Chen
T. Ferguson
G. Tatishvili
H. Vogel
M. E. Watkins
N. E. Adam
J. P. Alexander
K. Berkelman
V. Boisvert
D. G. Cassel
J. E. Duboscq
K. M. Ecklund
R. Ehrlich
R. S. Galik
L. Gibbons
B. Gittelman
S. W. Gray
D. L. Hartill
B. K. Heltsley
L. Hsu
C. D. Jones
J. Kandaswamy
D. L. Kreinick
A. Magerkurth
H. Mahlke-Kruger
T. O. Meyer
N. B. Mistry
J. R. Patterson
D. Peterson
J. Pivarski
S. J. Richichi
D. Riley
A. J. Sadoff
H. Schwarthoff
M. R. Shepherd
J. G. Thayer
D. Urner
T. Wilksen
A. Warburton
M. Weinberger
S. B. Athar
P. Avery
L. Breva-Newell
V. Potlia
H. Stoeck
J. Yelton
B. I. Eisenstein
G. D. Gollin
I. Karliner
N. Lowrey
C. Plager
C. Sedlack
M. Selen
J. J. Thaler
J. Williams
K. W. Edwards

Published in:

Physical Review D 68,3 (2003) 032002;

Abstract

Using 13.5 fb(-1) of e(+)e(-) annihilation data collected with the CLEO II detector, we have observed a narrow resonance decaying to D-s*(+)pi(0) with a mass near 2.46 GeV/c(2). The search for such a state was motivated by the recent discovery by the BaBar Collaboration of a narrow state at 2.32 GeV/c(2), the D-sJ*(2317)(+), that decays to D(s)(+)pi(0). Reconstructing the D(s)(+)pi(0) and D-s*(+)pi(0) final states in CLEO data, we observe peaks in both of the corresponding reconstructed mass difference distributions, DeltaM(D(s)pi(0))=M(D(s)pi(0))-M(D-s) and DeltaM(D-s*pi(0))=M(D-s*pi(0))-M(D-s*), both of them at values near 350 MeV/c(2). We interpret these peaks as signatures of two distinct states, the D-sJ*(2317)(+) plus a new state, designated as the D-sJ(2463)(+). Because of the similar DeltaM values, each of these states represents a source of background for the other if photons are lost, ignored or added. A quantitative accounting of these reflections confirms that both states exist. We have measured the mean mass differences =350.0+/-1.2 (stat)+/-1.0 (syst) MeV/c(2) for the D-sJ*(2317)(+) state, and =351.2+/-1.7 (stat)+/-1.0 (syst) MeV/c(2) for the new D-sJ(2463)(+) state. We have also searched, but find no evidence, for decays of the two states via the channels D-s*(+)gamma, D(s)(+)gamma, and D(s)(+)pi(+)pi(-). The observations of the two states at 2.32 and 2.46 GeV/c(2), in the D(s)(+)pi(0) and D-s*(+)pi(0) decay channels, respectively, are consistent with their interpretations as c (s) over bar mesons with an orbital angular momentum L=1 and spin and parity J(P)=0(+) and 1(+).

Keywords

heavy-quark symmetry;; spectroscopy;; meson;; model;; detector

Date of this Version

January 2003

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