Browsing by Author "Abachi S."
  • Institution Publication
    Constraints on the CKM angle γ in B0→D̄0K*0 and B0→D0K*0 from a Dalitz analysis of D0 and D̄0 decays to KSπ+π-
    ( 2009-04-01)
    Aubert B.
    ;
    Bona M.
    ;
    Karyotakis Y.
    ;
    Lees J.P.
    ;
    Poireau V.
    ;
    Prudent X.
    ;
    Tisserand V.
    ;
    Zghiche A.
    ;
    Tico J.G.
    ;
    Grauges E.
    ;
    Lopez L.
    ;
    Palano A.
    ;
    Pappagallo M.
    ;
    Eigen G.
    ;
    Stugu B.
    ;
    Sun L.
    ;
    Abrams G.S.
    ;
    Battaglia M.
    ;
    Brown D.N.
    ;
    Button-Shafer J.
    ;
    Cahn R.N.
    ;
    Jacobsen R.G.
    ;
    Kadyk J.A.
    ;
    Kerth L.T.
    ;
    Kolomensky Y.G.
    ;
    Kukartsev G.
    ;
    Lynch G.
    ;
    Osipenkov I.L.
    ;
    Ronan M.T.
    ;
    Tackmann K.
    ;
    Tanabe T.
    ;
    Wenzel W.A.
    ;
    Hawkes C.M.
    ;
    Soni N.
    ;
    Watson A.T.
    ;
    Koch H.
    ;
    Schroeder T.
    ;
    Walker D.
    ;
    Asgeirsson D.J.
    ;
    Cuhadar-Donszelmann T.
    ;
    Fulsom B.G.
    ;
    Hearty C.
    ;
    Mattison T.S.
    ;
    McKenna J.A.
    ;
    Barrett M.
    ;
    Khan A.
    ;
    Saleem M.
    ;
    Teodorescu L.
    ;
    Blinov V.E.
    ;
    Bukin A.D.
    ;
    Buzykaev A.R.
    ;
    Druzhinin V.P.
    ;
    Golubev V.B.
    ;
    Onuchin A.P.
    ;
    Serednyakov S.I.
    ;
    Skovpen Y.I.
    ;
    Solodov E.P.
    ;
    Todyshev K.Y.
    ;
    Bondioli M.
    ;
    Curry S.
    ;
    Eschrich I.
    ;
    Kirkby D.
    ;
    Lankford A.J.
    ;
    Lund P.
    ;
    Mandelkern M.
    ;
    Martin E.C.
    ;
    Stoker D.P.
    ;
    Abachi S.
    ;
    Buchanan C.
    ;
    Gary J.W.
    ;
    Liu F.
    ;
    Long O.
    ;
    Shen B.C.
    ;
    Vitug G.M.
    ;
    Yasin Z.
    ;
    Zhang L.
    ;
    Paar H.P.
    ;
    Rahatlou S.
    ;
    Sharma V.
    ;
    Campagnari C.
    ;
    Hong T.M.
    ;
    Kovalskyi D.
    ;
    Mazur M.A.
    ;
    Richman J.D.
    ;
    Beck T.W.
    ;
    Eisner A.M.
    ;
    Flacco C.J.
    ;
    Heusch C.A.
    ;
    Kroseberg J.
    ;
    Lockman W.S.
    ;
    Schalk T.
    ;
    Schumm B.A.
    ;
    Seiden A.
    ;
    Wilson M.G.
    ;
    Winstrom L.O.
    ;
    Chen E.
    ;
    Cheng C.H.
    ;
    Doll D.A.
    ;
    Echenard B.
    ;
    Fang F.
    We present constraints on the angle γ of the unitarity triangle with a Dalitz analysis of neutral D decays to KSπ+π- from the processes B0→D̄0K*0 (B̄0→D0K̄*0) and B0→D0K*0 (B̄0→D̄0K̄*0) with K*0→K+π- (K̄*0→K-π+). Using a sample of 371×106 BB̄ pairs collected with the BABAR detector at PEP-II, we constrain the angle γ as a function of rS, the magnitude of the average ratio between b→u and b→c amplitudes. © 2009 The American Physical Society.
  • Institution Publication
    Exclusive initial-state-radiation production of the DD̄, D*D̄, and D*D̄* systems
    ( 2009-05-01)
    Aubert B.
    ;
    Karyotakis Y.
    ;
    Lees J.P.
    ;
    Poireau V.
    ;
    Prencipe E.
    ;
    Prudent X.
    ;
    Tisserand V.
    ;
    Garra Tico J.
    ;
    Grauges E.
    ;
    Lopez L.
    ;
    Lopez L.
    ;
    Palano A.
    ;
    Palano A.
    ;
    Pappagallo M.
    ;
    Pappagallo M.
    ;
    Eigen G.
    ;
    Stugu B.
    ;
    Sun L.
    ;
    Battaglia M.
    ;
    Brown D.N.
    ;
    Kerth L.T.
    ;
    Kolomensky Y.G.
    ;
    Lynch G.
    ;
    Osipenkov I.L.
    ;
    Tackmann K.
    ;
    Tanabe T.
    ;
    Hawkes C.M.
    ;
    Soni N.
    ;
    Watson A.T.
    ;
    Koch H.
    ;
    Schroeder T.
    ;
    Asgeirsson D.J.
    ;
    Fulsom B.G.
    ;
    Hearty C.
    ;
    Mattison T.S.
    ;
    McKenna J.A.
    ;
    Barrett M.
    ;
    Khan A.
    ;
    Randle-Conde A.
    ;
    Blinov V.E.
    ;
    Bukin A.D.
    ;
    Buzykaev A.R.
    ;
    Druzhinin V.P.
    ;
    Golubev V.B.
    ;
    Onuchin A.P.
    ;
    Serednyakov S.I.
    ;
    Skovpen Y.I.
    ;
    Solodov E.P.
    ;
    Todyshev K.Y.
    ;
    Bondioli M.
    ;
    Curry S.
    ;
    Eschrich I.
    ;
    Kirkby D.
    ;
    Lankford A.J.
    ;
    Lund P.
    ;
    Mandelkern M.
    ;
    Martin E.C.
    ;
    Stoker D.P.
    ;
    Abachi S.
    ;
    Buchanan C.
    ;
    Atmacan H.
    ;
    Gary J.W.
    ;
    Liu F.
    ;
    Long O.
    ;
    Vitug G.M.
    ;
    Yasin Z.
    ;
    Zhang L.
    ;
    Sharma V.
    ;
    Campagnari C.
    ;
    Hong T.M.
    ;
    Kovalskyi D.
    ;
    Mazur M.A.
    ;
    Richman J.D.
    ;
    Beck T.W.
    ;
    Eisner A.M.
    ;
    Heusch C.A.
    ;
    Kroseberg J.
    ;
    Lockman W.S.
    ;
    Martinez A.J.
    ;
    Schalk T.
    ;
    Schumm B.A.
    ;
    Seiden A.
    ;
    Winstrom L.O.
    ;
    Cheng C.H.
    ;
    Doll D.A.
    ;
    Echenard B.
    ;
    Fang F.
    ;
    Hitlin D.G.
    ;
    Narsky I.
    ;
    Piatenko T.
    ;
    Porter F.C.
    ;
    Andreassen R.
    ;
    Mancinelli G.
    ;
    Meadows B.T.
    ;
    Mishra K.
    ;
    Sokoloff M.D.
    ;
    Bloom P.C.
    ;
    Ford W.T.
    ;
    Gaz A.
    ;
    Hirschauer J.F.
    ;
    Nagel M.
    ;
    Nauenberg U.
    ;
    Smith J.G.
    We perform a study of the exclusive production of DD̄, D*D̄, and D*D̄* in initial-state-radiation events, from e+e- annihilations at a center-of-mass energy near 10.58.
  • Institution Publication
    Measurement of D0-D̄0 Mixing from a Time-Dependent Amplitude Analysis of D0→K+π-π0 Decays
    ( 2009-11-18)
    Aubert B.
    ;
    Bona M.
    ;
    Karyotakis Y.
    ;
    Lees J.P.
    ;
    Poireau V.
    ;
    Prencipe E.
    ;
    Prudent X.
    ;
    Tisserand V.
    ;
    Tico J.G.
    ;
    Grauges E.
    ;
    Lopez L.
    ;
    Lopez L.
    ;
    Palano A.
    ;
    Palano A.
    ;
    Pappagallo M.
    ;
    Pappagallo M.
    ;
    Eigen G.
    ;
    Stugu B.
    ;
    Sun L.
    ;
    Abrams G.S.
    ;
    Battaglia M.
    ;
    Brown D.N.
    ;
    Cahn R.N.
    ;
    Jacobsen R.G.
    ;
    Kerth L.T.
    ;
    Kolomensky Y.G.
    ;
    Lynch G.
    ;
    Osipenkov I.L.
    ;
    Ronan M.T.
    ;
    Tackmann K.
    ;
    Tanabe T.
    ;
    Hawkes C.M.
    ;
    Soni N.
    ;
    Watson A.T.
    ;
    Koch H.
    ;
    Schroeder T.
    ;
    Walker D.
    ;
    Asgeirsson D.J.
    ;
    Fulsom B.G.
    ;
    Hearty C.
    ;
    Mattison T.S.
    ;
    McKenna J.A.
    ;
    Barrett M.
    ;
    Khan A.
    ;
    Blinov V.E.
    ;
    Bukin A.D.
    ;
    Buzykaev A.R.
    ;
    Druzhinin V.P.
    ;
    Golubev V.B.
    ;
    Onuchin A.P.
    ;
    Serednyakov S.I.
    ;
    Skovpen Y.I.
    ;
    Solodov E.P.
    ;
    Todyshev K.Y.
    ;
    Bondioli M.
    ;
    Curry S.
    ;
    Eschrich I.
    ;
    Kirkby D.
    ;
    Lankford A.J.
    ;
    Lund P.
    ;
    Mandelkern M.
    ;
    Martin E.C.
    ;
    Stoker D.P.
    ;
    Abachi S.
    ;
    Buchanan C.
    ;
    Gary J.W.
    ;
    Liu F.
    ;
    Long O.
    ;
    Shen B.C.
    ;
    Vitug G.M.
    ;
    Yasin Z.
    ;
    Zhang L.
    ;
    Sharma V.
    ;
    Campagnari C.
    ;
    Hong T.M.
    ;
    Kovalskyi D.
    ;
    Mazur M.A.
    ;
    Richman J.D.
    ;
    Beck T.W.
    ;
    Eisner A.M.
    ;
    Flacco C.J.
    ;
    Heusch C.A.
    ;
    Kroseberg J.
    ;
    Lockman W.S.
    ;
    Schalk T.
    ;
    Schumm B.A.
    ;
    Seiden A.
    ;
    Wang L.
    ;
    Wilson M.G.
    ;
    Winstrom L.O.
    ;
    Cheng C.H.
    ;
    Doll D.A.
    ;
    Echenard B.
    ;
    Fang F.
    ;
    Hitlin D.G.
    ;
    Narsky I.
    ;
    Piatenko T.
    ;
    Porter F.C.
    ;
    Andreassen R.
    ;
    Mancinelli G.
    ;
    Meadows B.T.
    ;
    Mishra K.
    ;
    Sokoloff M.D.
    We present evidence of D0-D̄0 mixing using a time-dependent amplitude analysis of the decay D0→K+π-π0 in a data sample of 384fb-1 collected with the BABAR detector at the PEP-II e+e- collider at the Stanford Linear Accelerator Center. Assuming CP conservation, we measure the mixing parameters xKππ0′=[2.61-0.68+0.57(stat)±0.39(syst)]%, yKππ0′=[-0.06-0.64+0.55(stat)±0.34(syst)]%. This result is inconsistent with the no-mixing hypothesis with a significance of 3.2 standard deviations. We find no evidence of CP violation in mixing. © 2009 The American Physical Society.
  • Institution Publication
    Search for the Z(4430)- at B A B AR
    ( 2009-06-01)
    Aubert B.
    ;
    Bona M.
    ;
    Karyotakis Y.
    ;
    Lees J.P.
    ;
    Poireau V.
    ;
    Prencipe E.
    ;
    Prudent X.
    ;
    Tisserand V.
    ;
    Tico J.G.
    ;
    Grauges E.
    ;
    Lopez L.
    ;
    Lopez L.
    ;
    Palano A.
    ;
    Palano A.
    ;
    Pappagallo M.
    ;
    Pappagallo M.
    ;
    Eigen G.
    ;
    Stugu B.
    ;
    Sun L.
    ;
    Abrams G.S.
    ;
    Battaglia M.
    ;
    Brown D.N.
    ;
    Cahn R.N.
    ;
    Jacobsen R.G.
    ;
    Kerth L.T.
    ;
    Kolomensky Y.G.
    ;
    Lynch G.
    ;
    Osipenkov I.L.
    ;
    Ronan M.T.
    ;
    Tackmann K.
    ;
    Tanabe T.
    ;
    Hawkes C.M.
    ;
    Soni N.
    ;
    Watson A.T.
    ;
    Koch H.
    ;
    Schroeder T.
    ;
    Walker D.
    ;
    Asgeirsson D.J.
    ;
    Fulsom B.G.
    ;
    Hearty C.
    ;
    Mattison T.S.
    ;
    McKenna J.A.
    ;
    Barrett M.
    ;
    Khan A.
    ;
    Blinov V.E.
    ;
    Bukin A.D.
    ;
    Buzykaev A.R.
    ;
    Druzhinin V.P.
    ;
    Golubev V.B.
    ;
    Onuchin A.P.
    ;
    Serednyakov S.I.
    ;
    Skovpen Y.I.
    ;
    Solodov E.P.
    ;
    Todyshev K.Y.
    ;
    Bondioli M.
    ;
    Curry S.
    ;
    Eschrich I.
    ;
    Kirkby D.
    ;
    Lankford A.J.
    ;
    Lund P.
    ;
    Mandelkern M.
    ;
    Martin E.C.
    ;
    Stoker D.P.
    ;
    Abachi S.
    ;
    Buchanan C.
    ;
    Atmacan H.
    ;
    Gary J.W.
    ;
    Liu F.
    ;
    Long O.
    ;
    Vitug G.M.
    ;
    Yasin Z.
    ;
    Zhang L.
    ;
    Sharma V.
    ;
    Campagnari C.
    ;
    Hong T.M.
    ;
    Kovalskyi D.
    ;
    Mazur M.A.
    ;
    Richman J.D.
    ;
    Beck T.W.
    ;
    Eisner A.M.
    ;
    Flacco C.J.
    ;
    Heusch C.A.
    ;
    Kroseberg J.
    ;
    Lockman W.S.
    ;
    Martinez A.J.
    ;
    Schalk T.
    ;
    Schumm B.A.
    ;
    Seiden A.
    ;
    Wilson M.G.
    ;
    Winstrom L.O.
    ;
    Cheng C.H.
    ;
    Doll D.A.
    ;
    Echenard B.
    ;
    Fang F.
    ;
    Hitlin D.G.
    ;
    Narsky I.
    ;
    Piatenko T.
    ;
    Porter F.C.
    ;
    Andreassen R.
    ;
    Mancinelli G.
    ;
    Meadows B.T.
    ;
    Mishra K.
    ;
    Sokoloff M.D.
    We report the results of a search for Z(4430)- decay to J/ψπ- or ψ(2S)π- in B-,0→J/ψπ-K0,+ and B-,0→ψ(2S)π-K0,+ decays. The data were collected with the BABAR detector at the SLAC PEP-II asymmetric-energy e+e- collider operating at center-of-mass energy 10.58 GeV, and the sample corresponds to an integrated luminosity of 413fb-1. Each Kπ- mass distribution exhibits clear K*(892) and K2*(1430) signals, and the efficiency-corrected spectrum is well described by a superposition of the associated Breit-Wigner intensity distributions, together with an S-wave contribution obtained from the LASS I=1/2 Kπ- scattering amplitude measurements. Each Kπ- angular distribution varies significantly in structure with Kπ- mass, and is represented in terms of low-order Legendre polynomial moments. We find that each J/ψπ- or ψ(2S)π- mass distribution is well described by the reflection of the measured Kπ- mass and angular distribution structures. We see no significant evidence for a Z(4430)- signal for any of the processes investigated, neither in the total J/ψπ- or ψ(2S)π- mass distribution, nor in the corresponding distributions for the regions of Kπ- mass for which observation of the Z(4430)- signal was reported. We obtain branching-fraction upper limits B(B-→Z-K̄0,Z- →J/ψπ-)<1.5×10-5, B(B0→Z-K+,Z-→J/ψπ-) <0.4×10-5, B(B-→Z-K̄0,Z-→ψ(2S)π-)<4. 7×10-5, and B(B0→Z-K+,Z-→ψ(2S)π-)<3.1×10-5 at 95% confidence level, where the Z(4430)- mass and width have been fixed to the reported central values. © 2009 The American Physical Society.
  • Institution Publication
    Time-dependent amplitude analysis of B0→KS0π+π-
    ( 2009-12-02)
    Aubert B.
    ;
    Karyotakis Y.
    ;
    Lees J.P.
    ;
    Poireau V.
    ;
    Prencipe E.
    ;
    Prudent X.
    ;
    Tisserand V.
    ;
    Tico J.G.
    ;
    Grauges E.
    ;
    Martinelli M.
    ;
    Martinelli M.
    ;
    Palano A.
    ;
    Palano A.
    ;
    Pappagallo M.
    ;
    Pappagallo M.
    ;
    Eigen G.
    ;
    Stugu B.
    ;
    Sun L.
    ;
    Battaglia M.
    ;
    Brown D.N.
    ;
    Kerth L.T.
    ;
    Kolomensky Y.G.
    ;
    Lynch G.
    ;
    Osipenkov I.L.
    ;
    Tackmann K.
    ;
    Tanabe T.
    ;
    Hawkes C.M.
    ;
    Soni N.
    ;
    Watson A.T.
    ;
    Koch H.
    ;
    Schroeder T.
    ;
    Asgeirsson D.J.
    ;
    Fulsom B.G.
    ;
    Hearty C.
    ;
    Mattison T.S.
    ;
    McKenna J.A.
    ;
    Barrett M.
    ;
    Khan A.
    ;
    Randle-Conde A.
    ;
    Blinov V.E.
    ;
    Bukin A.D.
    ;
    Buzykaev A.R.
    ;
    Druzhinin V.P.
    ;
    Golubev V.B.
    ;
    Onuchin A.P.
    ;
    Serednyakov S.I.
    ;
    Skovpen Y.I.
    ;
    Solodov E.P.
    ;
    Todyshev K.Y.
    ;
    Bondioli M.
    ;
    Curry S.
    ;
    Eschrich I.
    ;
    Kirkby D.
    ;
    Lankford A.J.
    ;
    Lund P.
    ;
    Mandelkern M.
    ;
    Martin E.C.
    ;
    Stoker D.P.
    ;
    Abachi S.
    ;
    Buchanan C.
    ;
    Atmacan H.
    ;
    Gary J.W.
    ;
    Liu F.
    ;
    Long O.
    ;
    Vitug G.M.
    ;
    Yasin Z.
    ;
    Zhang L.
    ;
    Sharma V.
    ;
    Campagnari C.
    ;
    Hong T.M.
    ;
    Kovalskyi D.
    ;
    Mazur M.A.
    ;
    Richman J.D.
    ;
    Beck T.W.
    ;
    Eisner A.M.
    ;
    Heusch C.A.
    ;
    Kroseberg J.
    ;
    Lockman W.S.
    ;
    Martinez A.J.
    ;
    Schalk T.
    ;
    Schumm B.A.
    ;
    Seiden A.
    ;
    Winstrom L.O.
    ;
    Cheng C.H.
    ;
    Doll D.A.
    ;
    Echenard B.
    ;
    Fang F.
    ;
    Hitlin D.G.
    ;
    Narsky I.
    ;
    Piatenko T.
    ;
    Porter F.C.
    ;
    Andreassen R.
    ;
    Mancinelli G.
    ;
    Meadows B.T.
    ;
    Mishra K.
    ;
    Sokoloff M.D.
    ;
    Bloom P.C.
    ;
    Ford W.T.
    ;
    Gaz A.
    ;
    Hirschauer J.F.
    ;
    Nagel M.
    ;
    Nauenberg U.
    ;
    Smith J.G.
    We perform a time-dependent amplitude analysis of B0→KS0π+π- decays to extract the CP violation parameters of f0(980)KS0 and ρ0(770)KS0 and the direct CP asymmetry of K*+(892)π-. The results are obtained from a data sample of (383±3)×106 BB̄ decays, collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We find two solutions, with an equivalent goodness-of-fit. Including systematic and Dalitz plot model uncertainties, the combined confidence interval for values of the CP parameter βeff in B0 decays to f0(980)KS0 is 18°<β eff<76° at 95% confidence level (C.L). CP conservation in B0 decays to f0(980)KS0 is excluded at 3.5 standard deviations including systematic uncertainties. For B0 decays to ρ0(770)KS0, the combined confidence interval is -9°<βeff<57° at 95% C.L. In decays to K*+(892)π- we measure the direct CP asymmetry to be ACP=-0.20±0.10±0. 01±0.02. The measured phase difference (including B0B̄0 mixing) between decay amplitudes of B0→K*+(892)π- and B̄0→K *-(892)π+, excludes the interval -137°<ΔΦ(K*+(892) π-)<-5° at 95% C.L. © 2009 The American Physical Society.