S. Radeztsky

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E. M. Aitala,9 S. Amato,1 J. C. Anjos,1 J. A. Appel,5 D. Ashery,14 S. Banerjee,5 I. Bediaga,1 G. Blaylock,8 S. B. Bracker,15 P. R. Burchat,13 R. A. Burnstein,6 T. Carter,5 H. S. Carvalho,1 N. K. Copty,12 L. M. Cremaldi,9 C. Darling,18 K. Denisenko,5 S. Devmal,3 A. Fernandez,11 G. F. Fox,12 P. Gagnon,2 C. Gobel,1 K. Gounder,9 A. M. Halling,5 G. Herrera,4 G.(More)
From a sample of 1172 ± 61 D → πππ decay, we find Γ(D → πππ)/Γ(D → Kππ) = 0.0311 ± 0.0018 −0.0026. Using a coherent amplitude analysis to fit the Dalitz plot of this decays, we find strong evidence that a scalar resonance of mass 478 −23 ± 17 MeV/c 2 and width 324 −40 ± 21 MeV/c accounts for approximately half of all decays.
We have studied the diffractive dissociation into dijets of 500 GeV/c pions scattering coherently from carbon and platinum targets. Extrapolating to asymptotically high energies (where t(min)-->0), we find that when the per-nucleus cross section for this process is parametrized as sigma = sigma0Aalpha, alpha has values near 1.6, the exact result depending(More)
We study the Dalitz plot of the decay D(+)-->K(-)pi(+)pi(+) with a sample of 15090 events from Fermilab experiment E791. Modeling the decay amplitude as the coherent sum of known Kpi resonances and a uniform nonresonant term, we do not obtain an acceptable fit. If we allow the mass and width of the K(*)(0)(1430) to float, we obtain values consistent with(More)
From a sample of 848+/-44 D(+)(s)-->pi(-)pi(+)pi(+) decays, we find gamma(D(+)(s)-->pi(-)pi(+)pi(+))/gamma(D(+)(s)-->straight phipi(+)) = 0.245+/-0.028(+0.019)(-0.012). Using a Dalitz plot analysis of this three body decay, we find significant contributions from the channels rho(0)(770)pi(+), rho(0)(1450)pi(+), f(0)(980)pi(+), f(2)(1270)pi(+), and(More)
D. J. Summers, E. M. Aitala, S. Amato, J. C. Anjos, J. A. Appel, D. Ashery, S. Banerjee, I. Bediaga, G. Blaylock, S. B. Bracker, P. R. Burchat, R. A. Burnstein, T. Carter, H. S. Carvalho, N. K. Copty, L. M. Cremaldi, C. Darling, K. Denisenko, S. Devmal, A. Fernandez, G. F. Fox, P. Gagnon, C. Gobel, K. Gounder, A. M. Halling, G. Herrera, G. Hurvits, C.(More)
We report the results of a search for the avor-changing neutral-current decays D + ! + + ? and D + ! + e + e ? in data from Fermilab charm hadroproduction experiment E791. No signal above background is found, and we obtain upper limits on branching fractions, B(D + ! + + ?) < 2 Flavor-changing neutral-current (FCNC) decays have played a major role in our(More)
We present the first direct measurements of the pion valence-quark momentum distribution which is related to the square of the pion light-cone wave function. The measurements were carried out using data on diffractive dissociation of 500 GeV/c pi(-) into dijets from a platinum target at Fermilab experiment E791. The results show that the /q&q> light-cone(More)
We present results of a search for D 0 ? D 0 mixing and doubly-Cabibbo-suppressed decays of the D 0 in Fermilab experiment E791, a xed-target charm hadroproduction experiment. We look for evidence of mixing in the decay chain D ! D ! (K or K). If the charge of the pion from the D decay is the same as the charge of the kaon from the D decay (a \wrong-sign"(More)
We report results of a search for CP violation in the singly Cabibbosuppressed decays D → KKπ, φπ, K(892)0K+, and πππ based on data from the charm hadroproduction experiment E791 at Fermilab. We search for a difference in theD andD decay rates for each of the final states. No evidence for a difference is seen. The decay rate asymmetry parameters (ACP ),(More)