J.F. Filaseta

Publications (5)0 Total impact

• Article: New results on heavy-flavor photoproduction from the E687 experiment at FNAL

  Collaboration, P. L. Frabetti, H. W. K. Cheung, J. P. Cumalat, C. Dallapiccola, J. F. Ginkel, S. V. Greene, W. E. Johns, M. S. Nehring, J. N. Butler, [......], J. R. Wilson, P. D. Sheldon, F. Davenport, J. F. Filaseta, G. R. Blackett, M. Pisharody, T. Handler, B. G. Cheon, J. S. Kang, K. Y. Kim
  [show abstract] [hide abstract]
  ABSTRACT: The new results on charm from E687 photoproduction experiment are presented. They follow from very high statistic measurents and cover a wide variety of physics items in the charm sector. Charm photoproduction studies, very accurate lifetime measurements, analysis of several semi-leptonic decays and hadronic decays are discussed. Particular attention has been devoted to compare E687 results with other experiments.
  Il Nuovo Cimento A 09/1994; 107(10):2025-2043.
• Article: A measurement of the Cabibbo-suppressed decays D0 → π−π+ and D0 → K−K+

  P.L. Frabetti, H.W.K. Cheung, J.P. Cumalat, C. Dallapiccola, J.F. Ginkel, S.V. Greene, W.E. Johns, M.S. Nehring, J.N. Butler, S. Cihangir, [......], J.R. Wilson, P.D. Sheldon, F. Davenport, J.F. Filaseta, G.R. Blackett, M. Pisharody, T. Handler, B.G. Cheon, J.S. Kang, K.Y. Kim
  [show abstract] [hide abstract]
  ABSTRACT: We report a measurement of the relative branching ratio of two Cabibbo-suppressed decay modes: D0 → π−π+ and D0 → K−K+. The data were accumulated in the 1990–1991 fixed target run of Fermilab high energy photoproduction experiment E687. The branching ratios of these modes relative to the Cabibbo-allowed decay D0 → K−π+ are also presented. The relative branching ratios are measured to be Γ(D0 → KK)/Γ(D0 → ππ) = 2.53 ± 0.46 ± 0.19, Γ(D0 → KK)/Γ(D0 → Kπ) = 0.109 ± 0.007 ± 0.009, and Γ(D0 → ππ)/Γ(D0 → Kπ) = 0.043 ± 0.007 ± 0.003.
  Physics Letters B.
• Article: Precise measurements of the D0 and D+ meson lifetimes

  P.L. Frabetti, H.W.K. Cheung, J.P. Cumalat, C. Dallapiccola, J.F. Ginkel, S.V. Greene, W.E. Johns, M.S. Nehring, J.N. Butler, S. Cihangir, [......], J.R. Wilson, P.D. Sheldon, F. Davenport, J.F. Filaseta, G.R. Blackett, M. Pisharody, T. Handler, B.G. Cheon, J.S. Kang, K.Y. Kim
  [show abstract] [hide abstract]
  ABSTRACT: We report precise measurements of the D0 and D+ meson lifetimes by the E687 Collaboration at Fermilab. The measurements have been made using 16000 fully reconstructed decays of the D0 into the K−π+ and K−π+π−π+ final states and 9000 decays of the D+ into the K−π+π+ final state. The lifetimes of the D0 and D+ mesons are measured to be 0.413±0.004±0.003 ps and 1.048±0.015±01011 ps respectively.
  Physics Letters B.
• Article: A measurement of Γ (DS+ → φμ+ν) /Γ (DS+ → φπ+)

  P.L. Frabetti, H.W.K. Cheung, J.P. Cumalat, C. Dallapiccola, J.F. Ginkel, S.V. Greene, W.E. Johns, M.S. Nehring, J.N. Butler, S. Cihangir, [......], J.R. Wilson, P.D. Sheldon, F. Davenport, J.F. Filaseta, G.R. Blackett, M. Pisharody, T. Handler, B.G. Cheon, J.S. Kang, K.Y. Kim
  [show abstract] [hide abstract]
  ABSTRACT: Fermilab high-energy photoproduction experiment E687 measures a branching ratio of Γ (DS+ → φμ+ν) /Γ (DS+ → φμ+) = 0.58 ± 0.17 (stat) ± 0.07 (sys). This branching ratio is combined with theoretical inputs to obtain a new measurement of the DS+ absolute branching ratio of Γ (DS+ → φμ+) / Γ (DS+ → all) = 0.031 ± 0.009 (stat 0.005 (sys) ± 0.004 (theoretical).
  Physics Letters B.
• Article: Measurement of the form factors for the decay D+s → φμ+ν

  P.L. Frabetti, H.W.K. Cheung, J.P. Cumalat, D. Dallapiccola, J.F. Ginkel, S.V. Greene, W.E. Johns, M.S. Nehring, J.N. Butler, S. Cihangir, [......], J.R. Wilson, P.D. Sheldon, F. Davenport, J.F. Filaseta, G.R. Blackett, M. Pisharody, T. Handler, B.G. Cheon, J.S. Kang, K.Y. Kim
  [show abstract] [hide abstract]
  ABSTRACT: The fermilab high-energy photoproduction experiment E687 provides a sample of approximately 90 events of the decay mode D+s→ φμ+ν. The ratios of the form factors governing the decay are measured to be Rv=1.8±0.9±0.2 and R2= 1.1±0.8±0.1, implying a polarization of for the electron decay, consistent with our measurement of the form factor for the decay .
  Physics Letters B.