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(+).
Published in:
Physical Review D 68,3 (2003) 032002;
Link to original published article:
http://dx.doi.org/10.1103/PhysRevD.68.032002
Keywords
heavy-quark symmetry;; spectroscopy;; meson;; model;; detector
Date of Version
January 2003
Recommended Citation
Besson, D.; Anderson, S.; Frolov, V. V.; Gong, D. T.; Kubota, Y.; Li, S. Z.; Poling, R.; Smith, A.; Stepaniak, C. J.; Urheim, J.; Metreveli, Z.; Seth, K. K.; Tomaradze, A.; Zweber, P.; Arms, K.; Eckhart, E.; Gan, K. K.; Gwon, C.; Pedlar, T. K.; von Toerne, E.; Severini, H.; Skubic, P.; Dytman, S. A.; Mueller, J. A.; Nam, S.; Savinov, V.; Hinson, J. W.; Huang, G. S.; Lee, J.; Miller, D. H.; Pavlunin, V.; Sanghi, B.; Shibata, E. I.; Shipsey, I. P. J.; Cronin-Hennessy, D.; Park, C. S.; Park, W.; Thayer, J. B.; Thorndike, E. H.; Coan, T. E.; Gao, Y. S.; Liu, F.; Stroynowski, R.; Artuso, M.; Boulahouache, C.; Blusk, S.; Dambasuren, E.; Dorjkhaidav, O.; Mountain, R.; Muramatsu, H.; Nandakumar, R.; Skwarnicki, T.; Stone, S.; Wang, J. C.; Mahmood, A. H.; Csorna, S. E.; Danko, I.; Bonvicini, G.; Cinabro, D.; Dubrovin, M.; McGee, S.; Bornheim, A.; Lipeles, E.; Pappas, S. P.; Shapiro, A.; Sun, W. M.; Weinstein, A. J.; Briere, R. A.; Chen, G. P.; Ferguson, T.; Tatishvili, G.; Vogel, H.; Watkins, M. E.; Adam, N. E.; Alexander, J. P.; Berkelman, K.; Boisvert, V.; Cassel, D. G.; Duboscq, J. E.; Ecklund, K. M.; Ehrlich, R.; Galik, R. S.; Gibbons, L.; Gittelman, B.; Gray, S. W.; Hartill, D. L.; Heltsley, B. K.; Hsu, L.; Jones, C. D.; Kandaswamy, J.; Kreinick, D. L.; Magerkurth, A.; Mahlke-Kruger, H.; Meyer, T. O.; Mistry, N. B.; Patterson, J. R.; Peterson, D.; Pivarski, J.; Richichi, S. J.; Riley, D.; Sadoff, A. J.; Schwarthoff, H.; Shepherd, M. R.; Thayer, J. G.; Urner, D.; Wilksen, T.; Warburton, A.; Weinberger, M.; Athar, S. B.; Avery, P.; Breva-Newell, L.; Potlia, V.; Stoeck, H.; Yelton, J.; Eisenstein, B. I.; Gollin, G. D.; Karliner, I.; Lowrey, N.; Plager, C.; Sedlack, C.; Selen, M.; Thaler, J. J.; Williams, J.; and Edwards, K. W., "Observation of a narrow resonance of mass 2.46 GeV/c(2) decaying to D-s(*+)pi(0) and confirmation of the D-sJ(*)(2317) state" (2003). Department of Physics and Astronomy Faculty Publications. Paper 517.
https://docs.lib.purdue.edu/physics_articles/517