Chronology of Milestone Events in Particle Physics - BRANDELIK 1977D
Chronology of Milestone Events in Particle Physics

BRANDELIK 1977D

DASP Collaboration; Brandelik, R. et al.
Evidence for the F Meson
Phys. Lett. 70B (1977) 132;

Reprinted in
J. L. Rosner, New Particles. Selected Reprints, Stony Brook, Am. Ass. of Physics Teachers (1981) 74.

Abstracts
Inclusive production by e+ e annihilation for cm energies between 4 and 5.2 GeV was studied. A strong signal was observed at 4.4 GeV, produced predominantly in conjunction with a low energy photon suggestive of F* or F** production. From events containing a and , and a low energy photon the F and F* masses were found to be 2.03 0.06 and 2.14 0.06 GeV, respectively.

Accelerator DESY-DORIS Detectors DASP

Related references
See also
S. L. Glashow, J. Iliopoulos, and L. Maiani, Phys. Rev. D2 (1970) 1285;
J. Siegrist et al., Phys. Rev. Lett. 36 (1976) 700;
B. Knapp et al., Phys. Rev. Lett. 37 (1976) 882;
M. K. Gaillard, B. W. Lee, and J. L. Rosner, Rev. of Mod. Phys. 47 (1975) 277;
G. Goldhaber et al., Phys. Rev. Lett. 37 (1976) 255;
I. Peruzzi et al., Phys. Rev. Lett. 37 (1976) 569;
J. E. Wiss et al., Phys. Rev. Lett. 37 (1976) 1531;
DASP Coll., W. Braunschweig et al., Phys. Lett. 63B (1976) 471;
PLUTO Coll., J. Burmester et al., Phys. Lett. 64B (1976) 369;
PLUTO Coll., J. Burmester et al., Phys. Lett. 66B (1977) 395;
DASP Coll., R. Brandelik et al., Phys. Lett. 67B (1977) 243;
DASP Coll., R. Brandelik et al., Phys. Lett. 67B (1977) 358;
J. W. Tukey, Exploratory data analysis, Vol. III, ch.24, Addison Wesley, Reading, Mass. (1971);
J. I. Friedman, SLAC-preprint 176 (1974);
E. G. Cazzoli et al., Phys. Rev. Lett. 34 (1975) 1125;

Reactions
  e+ e 2 X 4-5.1 GeV (Ecm) cs, mass
  e+ e X 4-5.1 GeV (Ecm) cs
  e+ e Ds+ 4-5.1 GeV (Ecm) cs
  e+ e Ds + 4-5.1 GeV (Ecm) cs

Particles studied
  Ds+- ex, mass, w, qn
  Ds+ ex, mass, w, qn
  Ds ex, mass, w, qn
  Ds* ex, mass, w, qn
  Ds*+ ex, mass, w, qn
  Ds*- ex, mass, w, qn

Record comments
First evidence for Ds+- and Ds strange charmed mesons.
    
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