S. Weseler
University of Washington
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Physical Review Letters | 1989
Joan Adler; D.H. Coward; D. E. Dorfan; W. Stockhausen; W. J. Wisniewski; G. Eigen; D. Pitman; R. E. Cassell; D. Wisinski; K. O. Bunnell; A. I. Mincer; Robert F. Mozley; J. D. Richman; K. Einsweiler; A. Li; C. A. Heusch; A. J. Weinstein; I. E. Stockdale; H. J. Willutzki; A. Odian; R. P. Hamilton; B. Tripsas; R. H. Schindler; U. Mallik; T. Browder; C. Simopoulos; C. Gatto; S. A. Plaetzer; J. Drinkard; D. M. Coffman
Measurements of the exclusive branching fractions B(D^0→π^-e^+ν_e) and B(D^0→K^-e^+ν_e), using data collected at the ψ(3770) with the Mark III detector at the SLAC e^+e^- storage ring SPEAR, are used to determine the ratio of the Kobayashi-Maskawa matrix elements │V_(cd)/V_(cs)│^2 =0.057_(-0.015)^(+0.038)±0.005.
Physical Review Letters | 1990
Z. Bai; G. Blaylock; T. A. Bolton; T. E. Browder; J. S. Brown; K. O. Bunnell; T. H. Burnett; R. E. Cassell; D. M. Coffman; Cook; F. DeJongh; D. E. Dorfan; J. Drinkard; G. P. Dubois; G. Eigen; K. Einsweiler; B. I. Eisenstein; T. Freese; C. Gatto; G. E. Gladding; J. Hauser; C. A. Heusch; D. G. Hitlin; J. M. Izen; P. Kim; J. Labs; A. Li; W. S. Lockman; U. Mallik; C. G. Matthews
We present a study of the radiative decay J/ψ→γOO in the γK + K − K + K − and γK + K − K S 0 K L 0 final states. A pseudoscalar state is observed in the OO invariant-mass spectrum at 2.22 GeV/c 2 with a width of 150 MeV/c 2 . The product branching ratios are B(J/ψ→γX)B(X→OO)=(3.3±0.8±0.5)×10 −4 for the MeV/c γK + K − K + K − mode and B(J/ψ→γX)B(X→OO)=(2.7±0.6±0.6)×10 −4 for the γK + K − K S 0 K L 0 mode. No evidence for 2 ++ states below 2.4 GeV/c 2 is found in this decay
Physical Review Letters | 1990
Z. Bai; G. Blaylock; T. A. Bolton; T. E. Browder; J. S. Brown; K. O. Bunnell; T. H. Burnett; R. E. Cassell; D. M. Coffman; V. Cook; F. DeJongh; D. E. Dorfan; J. Drinkard; G. P. Dubois; G. Eigen; K. Einsweiler; B. I. Eisenstein; T. Freese; C. Gatto; G. E. Gladding; J. Hauser; C. A. Heusch; D. G. Hitlin; J. M. Izen; P. Kim; J. Labs; A. Li; W. S. Lockman; U. Mallik; C. G. Matthews
We present a study of the radiative decay J/ψ→γOO in the γK + K − K + K − and γK + K − K S 0 K L 0 final states. A pseudoscalar state is observed in the OO invariant-mass spectrum at 2.22 GeV/c 2 with a width of 150 MeV/c 2 . The product branching ratios are B(J/ψ→γX)B(X→OO)=(3.3±0.8±0.5)×10 −4 for the MeV/c γK + K − K + K − mode and B(J/ψ→γX)B(X→OO)=(2.7±0.6±0.6)×10 −4 for the γK + K − K S 0 K L 0 mode. No evidence for 2 ++ states below 2.4 GeV/c 2 is found in this decay
Physical Review Letters | 1990
Z. Bai; G. T. Blaylock; T. Bolton; T. Browder; J. S. Brown; K. O. Bunnell; T. H. Burnett; R. E. Cassell; D. Coffman; V. Cook; F. DeJongh; D. E. Dorfan; J. Drinkard; G. P. Dubois; G. Eigen; K. F. Einsweiler; B. I. Eisenstein; T. Freese; C. Gatto; G. Gladding; J. Hauser; C. A. Heusch; D. G. Hitlin; J. M. Izen; P. C. Kim; J. Labs; A. Li; W. S. Lockman; U. Mallik; C. G. Matthews
We present a study of the radiative decay J/ψ→γOO in the γK + K − K + K − and γK + K − K S 0 K L 0 final states. A pseudoscalar state is observed in the OO invariant-mass spectrum at 2.22 GeV/c 2 with a width of 150 MeV/c 2 . The product branching ratios are B(J/ψ→γX)B(X→OO)=(3.3±0.8±0.5)×10 −4 for the MeV/c γK + K − K + K − mode and B(J/ψ→γX)B(X→OO)=(2.7±0.6±0.6)×10 −4 for the γK + K − K S 0 K L 0 mode. No evidence for 2 ++ states below 2.4 GeV/c 2 is found in this decay
Nuclear Physics B - Proceedings Supplements | 1990
Ronen Mir; D. Coffman; G. P. Dubois; F. DeJongh; G. Eigen; J. Hauser; D. G. Hitlin; A. I. Mincer; C. G. Matthews; J. D. Richman; William J. Wisniewski; Y. Zhu; Joan Adler; J. C. Brient; T. E. Browder; K. O. Bunnell; R. E. Cassell; D.H. Coward; K. Einsweiler; C. Grab; P. Kim; J. Labs; A. Odian; D. Pitman; R. H. Schindler; W. H. Toki; F. Villa; S. Wasserbaech; D. Wisinski; Z. Bai
This paper presents recent results from the Mark III detector at SPEAR, in the open charm sector. The first topic discussed is the reanalysis of the direct measurement of the D hadronic branching fractions, where a detailed study has been made of the Cabibbo suppressed and multi-..pi../sup 0/s D decays backgrounds in the double tag sample. Next, the Dalitz plot analysis of the D decays to K..pi pi.. is presented, leading to the relative fractions of three-body versus pseudoscalarvector decays. 7 refs., 5 figs.
Physical Review Letters | 1989
J. Adler; J. J. Becker; G. T. Blaylock; T. Bolton; J. C. Brient; T. Browder; J. S. Brown; K. O. Bunnell; Mark J. Burchell; T. H. Burnett; R. E. Cassell; D. Coffman; V. Cook; D. H. Coward; F. DeJongh; D. E. Dorfan; J. Drinkard; G. P. Dubois; G. Eigen; K. F. Einsweiler; B. I. Eisenstein; T. Freese; C. Gatto; G. Gladding; C. Grab; R. P. Hamilton; J. Hauser; C. A. Heusch; D. G. Hitlin; J. M. Izen
Measurements of the exclusive branching fractions B(D^0→π^-e^+ν_e) and B(D^0→K^-e^+ν_e), using data collected at the ψ(3770) with the Mark III detector at the SLAC e^+e^- storage ring SPEAR, are used to determine the ratio of the Kobayashi-Maskawa matrix elements │V_(cd)/V_(cs)│^2 =0.057_(-0.015)^(+0.038)±0.005.
Physical Review Letters | 1989
Joan Adler; J. J. Becker; G. Blaylock; T. A. Bolton; J. C. Brient; T. Browder; J. S. Brown; K. O. Bunnell; Mark J. Burchell; T. H. Burnett; R. E. Cassell; D. M. Coffman; V. Cook; D.H. Coward; F. DeJongh; D. E. Dorfan; J. Drinkard; G. P. Dubois; G. Eigen; K. Einsweiler; B. I. Eisenstein; T. Freese; C. Gatto; G. E. Gladding; C. Grab; R. P. Hamilton; J. Hauser; C. A. Heusch; D. G. Hitlin; J. M. Izen
Measurements of the exclusive branching fractions B(D^0→π^-e^+ν_e) and B(D^0→K^-e^+ν_e), using data collected at the ψ(3770) with the Mark III detector at the SLAC e^+e^- storage ring SPEAR, are used to determine the ratio of the Kobayashi-Maskawa matrix elements │V_(cd)/V_(cs)│^2 =0.057_(-0.015)^(+0.038)±0.005.
Physical Review Letters | 1989
Joan Adler; J. J. Becker; G. Blaylock; T. A. Bolton; J. C. Brient; T. Browder; J. S. Brown; K. O. Bunnell; Mark J. Burchell; T. H. Burnett; R. E. Cassell; D. M. Coffman; Cook; D.H. Coward; F. DeJongh; D. E. Dorfan; J. Drinkard; G. P. Dubois; G. Eigen; K. Einsweiler; B. I. Eisenstein; T. Freese; C. Gatto; G. E. Gladding; C. Grab; R. P. Hamilton; J. Hauser; C. A. Heusch; D. G. Hitlin; J. M. Izen
Measurements of the exclusive branching fractions B(D^0→π^-e^+ν_e) and B(D^0→K^-e^+ν_e), using data collected at the ψ(3770) with the Mark III detector at the SLAC e^+e^- storage ring SPEAR, are used to determine the ratio of the Kobayashi-Maskawa matrix elements │V_(cd)/V_(cs)│^2 =0.057_(-0.015)^(+0.038)±0.005.
Physical Review D | 1989
Joan Adler; J. J. Becker; G. Blaylock; T. A. Bolton; J. C. Brient; J. S. Brown; K. O. Bunnell; Mark J. Burchell; T. H. Burnett; R. E. Cassell; D. M. Coffman; V. Cook; D.H. Coward; F. DeJongh; D. E. Dorfan; J. Drinkard; G. P. Dubois; G. Eigen; K. Einsweiler; B. I. Eisenstein; T. Freese; C. Gatto; G. E. Gladding; C. Grab; R. P. Hamilton; J. Hauser; C. A. Heusch; D. G. Hitlin; J. M. Izen; P. C. Kim
A search for the decay of the charmed meson /ital D//sup 0//r arrow//bar K//sup 0/e/sup +/e/sup /minus// is presented, based on data collected at the /psi/(3770) resonance with the Mark III detector at the SLAC storage ring SPEAR. No evidence for this process is found, resulting in an upper limit on the decay branching ratio of 1.7/times/10/sup /minus/3/ at the 90% confidence level.
Physical Review Letters | 1990
Z. Bai; G. Blaylock; T. A. Bolton; J. C. Brient; T. E. Browder; J. S. Brown; K. O. Bunnell; Mark J. Burchell; T. H. Burnett; R. E. Cassell; D. M. Coffman; Cook; D.H. Coward; F. DeJongh; D. E. Dorfan; J. Drinkard; G. P. Dubois; G. Eigen; K. Einsweiler; B. I. Eisenstein; T. Freese; C. Gatto; G. E. Gladding; C. Grab; J. Hauser; C. A. Heusch; D. G. Hitlin; J. M. Izen; P. C. Kim; J. Labs
