J. Button-Shafer

Measurements of moments of the hadronic mass distribution in semileptonic B decays

B. Aubert, R. Barate, D. Boutigny, F. Couderc, J.-M. Gaillard, A. Hicheur, Y. Karyotakis, J. P. Lees, V. Tisserand, A. Zghiche, A. Palano, A. Pompili, J. C. Chen, N. D. Qi, G. Rong, P. Wang, Y. S. Zhu, G. Eigen, I. Ofte, B. Stugu, G. S. Abrams, A. W. Borgland, A. B. Breon, D. N. Brown, J. Button-Shafer, R. N. Cahn, E. Charles, C. T. Day, M. S. Gill, A. V. Gritsan, Y. Groysman, R. G. Jacobsen, R. W. Kadel, J. Kadyk, L. T. Kerth, Yu. G. Kolomensky, G. Kukartsev, C. LeClerc, M. E. Levi, G. Lynch, L. M. Mir, P. J. Oddone, T. J. Orimoto, M. Pripstein, N. A. Roe, M. T. Ronan, V. G. Shelkov, A. V. Telnov, W. A. Wenzel, K. Ford, T. J. Harrison, C. M. Hawkes, S. E. Morgan, A. T. Watson, N. K. Watson, M. Fritsch, K. Goetzen, T. Held, H. Koch, B. Lewandowski, M. Pelizaeus, K. Peters, H. Schmuecker, M. Steinke, J. T. Boyd, N. Chevalier, W. N. Cottingham, M. P. Kelly, T. E. Latham, C. Mackay, F. F. Wilson, K. Abe, T. Cuhadar-Donszelmann, C. Hearty, T. S. Mattison, J. A. McKenna, D. Thiessen, P. Kyberd, A. K. McKemey, L. Teodorescu, V. E. Blinov, A. D. Bukin, V. B. Golubev, V. N. Ivanchenko, E. A. Kravchenko, A. P. Onuchin, S. I. Serednyakov, Yu. I. Skovpen, E. P. Solodov, A. N. Yushkov, D. Best, M. Bruinsma, M. Chao, I. Eschrich, D. Kirkby, A. J. Lankford, M. Mandelkern, R. K. Mommsen, W. Roethel, D. P. Stoker, C. Buchanan, B. L. Hartfiel, J. W. Gary, J. Layter, B. C. Shen, K. Wang, D. del Re, H. K. Hadavand, E. J. Hill, D. B. MacFarlane, H. P. Paar, Sh. Rahatlou, V. Sharma, J. W. Berryhill, C. Campagnari, B. Dahmes, S. L. Levy, O. Long, A. Lu, M. A. Mazur, J. D. Richman, W. Verkerke, T. W. Beck, J. Beringer, A. M. Eisner, C. A. Heusch, W. S. Lockman, T. Schalk, R. E. Schmitz, B. A. Schumm, A. Seiden, P. Spradlin, W. Walkowiak, D. C. Williams, M. G. Wilson, J. Albert, E. Chen, G. P. Dubois-Felsmann, A. Dvoretskii, R. J. Erwin, D. G. Hitlin, I. Narsky, T. Piatenko, F. C. Porter, A. Ryd, A. Samuel, S. Yang, S. Jayatilleke, G. Mancinelli, B. T. Meadows, M. D. Sokoloff, T. Abe, F. Blanc, P. Bloom, S. Chen, P. J. Clark, W. T. Ford, U. Nauenberg, A. Olivas, P. Rankin, J. Roy, J. G. Smith, W. C. van Hoek, L. Zhang, J. L. Harton, T. Hu, A. Soffer, W. H. Toki, R. J. Wilson, J. Zhang, D. Altenburg, T. Brandt, J. Brose, T. Colberg, M. Dickopp, E. Feltresi, A. Hauke, H. M. Lacker, E. Maly, R. Müller-Pfefferkorn, R. Nogowski, S. Otto, J. Schubert, K. R. Schubert, R. Schwierz, B. Spaan, D. Bernard, G. R. Bonneaud, F. Brochard, P. Grenier, Ch. Thiebaux, G. Vasileiadis, M. Verderi, D. J. Bard, A. Khan, D. Lavin, F. Muheim, S. Playfer, M. Andreotti, V. Azzolini, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Luppi, M. Negrini, L. Piemontese, A. Sarti, E. Treadwell, R. Baldini-Ferroli, A. Calcaterra, R. de Sangro, G. Finocchiaro, P. Patteri, M. Piccolo, A. Zallo, A. Buzzo, R. Capra, R. Contri, G. Crosetti, M. Lo Vetere, M. Macri, M. R. Monge, S. Passaggio, C. Patrignani, E. Robutti, A. Santroni, S. Tosi, S. Bailey, M. Morii, E. Won, R. S. Dubitzky, U. Langenegger, W. Bhimji, D. A. Bowerman, P. D. Dauncey, U. Egede, J. R. Gaillard, G. W. Morton, J. A. Nash, G. P. Taylor, G. J. Grenier, S.-J. Lee, U. Mallik, J. Cochran, H. B. Crawley, J. Lamsa, W. T. Meyer, S. Prell, E. I. Rosenberg, J. Yi, M. Davier, G. Grosdidier, A. Höcker, S. Laplace, F. Le Diberder, V. Lepeltier, A. M. Lutz, T. C. Petersen, S. Plaszczynski, M. H. Schune, L. Tantot, G. Wormser, V. Brigljević, C. H. Cheng, D. J. Lange, M. C. Simani, D. M. Wright, A. J. Bevan, J. P. Coleman, J. R. Fry, E. Gabathuler, R. Gamet, M. Kay, R. J. Parry, D. J. Payne, R. J. Sloane, C. Touramanis, J. J. Back, P. F. Harrison, G. B. Mohanty, C. L. Brown, G. Cowan, R. L. Flack, H. U. Flaecher, S. George, M. G. Green, A. Kurup, C. E. Marker, T. R. McMahon, S. Ricciardi, F. Salvatore, G. Vaitsas, M. A. Winter, D. Brown, C. L. Davis, J. Allison, N. R. Barlow, R. J. Barlow, P. A. Hart, M. C. Hodgkinson, G. D. Lafferty, A. J. Lyon, J. C. Williams, A. Farbin, W. D. Hulsbergen, A. Jawahery, D. Kovalskyi, C. K. Lae, V. Lillard, D. A. Roberts, G. Blaylock, C. Dallapiccola, K. T. Flood, S. S. Hertzbach, R. Kofler, V. B. Koptchev, T. B. Moore, S. Saremi, H. Staengle, S. Willocq, R. Cowan, G. Sciolla, F. Taylor, R. K. Yamamoto, D. J. J. Mangeol,

Dalitz Plot Analysis of the Decay B0(B0bar) to K^+/- pi^-/+ pi0

We report a Dalitz-plot analysis of the charmless hadronic decays of neutral B mesons to K±π∓π0. With a sample of (231.8±2.6)×106Υ(4S)→BB decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we measure the magnitudes and phases of the intermediate resonant and nonresonant amplitudes for B0 and B 0 decays and determine the corresponding CP-averaged branching fractions and charge asymmetries. The inclusive branching fraction and CP-violating charge asymmetry are measured to be B(B0→K+π-π0)=(35.7-1.5+2.6±2.2)×10-6 and ACP=-0.030-0.051+0.045±0.055 where the first errors are statistical and the second systematic. We observe the decay B0→K*0(892)π0 with the branching fraction B(B0→K*0(892)π0)=(3.6-0.8+0.7±0.4)×10-6. This measurement differs from zero by 5.6 standard deviations (including the systematic uncertainties). The selected sample also contains B0→D 0π0 decays where D 0→K+π-, and we measure B(B0→D 0π0)=(2.93±0.17±0.18)×10-4.

Measurement of the Decay B{sup -}{yields}D*{sup 0}e{sup -}{nu}{sub e}

Using 226x10{sup 6} BB events recorded on the {upsilon}(4S) resonance with the BABAR detector at the SLAC e{sup +}e{sup -} PEP-II storage rings, we reconstruct B{sup -}{yields}D*{sup 0}e{sup -}{nu}{sub e} decays using the decay chain D*{sup 0}{yields}D{sup 0}{pi}{sup 0} and D{sup 0}{yields}K{sup -}{pi}{sup +}. From the dependence of their differential rate on w, the dot product of the four velocities of B{sup -} and D*{sup 0}, and using the form factor description by Caprini et al. with the parameters F(1) and {rho}{sub A{sub 1}}{sup 2}, we obtain the results {rho}{sub A{sub 1}}{sup 2}=1.16{+-}0.06{+-}0.08, F(1)|V{sub cb}|=(35.9{+-}0.6{+-}1.4)x10{sup -3}, and B(B{sup -}{yields}D*{sup 0}e{sup -}{nu}{sub e})=(5.56{+-}0.08{+-}0.41)%.

Search for Lepton Flavor Violating Decays {tau}{sup {+-}}{yields}l{sup {+-}}{omega}

A search for lepton flavor violating decays of a τ to a lighter-mass charged lepton and an ω vector meson is performed using 384.1  fb-1 of e+e- annihilation data collected with the BABAR detector at the Stanford Linear Accelerator Center PEP-II storage ring. No signal is found, and the upper limits on the branching ratios are determined to be B(τ±→e±ω)<1.1×10-7 and B(τ±→μ±ω)<1.0×10-7 at 90% confidence level.

Study of B-meson decays to {eta}{sub c}K{sup (*)}, {eta}{sub c}(2S)K{sup (*)}, and {eta}{sub c}{gamma}K{sup (*)}

We study two-body B-meson decays to a charmonium state (eta(c), eta(c)(2S) or h(c)) and a K+ or K-*0(892) meson using a sample of 349 fb(-1) of data collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at the Stanford Linear Accelerator Center. We measure B(B-0 -> eta K-c*(0)) = (5.7 +/- 0.6(stat) +/- 0.9(syst)) x 10(-4), B(B-0 -> eta(c)(2S)K*(0)) h(c)K(+)) x B(h(c) -> eta(c)gamma) h(c)K*(0)) x B(h(c) -> eta(c)gamma) K (K) over bar pi) = (1.9 +/- 0.4(stat) +/- 1.1(syst))%. We also measure the mass and width of the eta(c) meson to be m(eta(c)) = (2985.8 +/- 1.5(stat) +/- 3.1(syst)) MeV/c(2) and Gamma(eta(c)) = (36.3(-3.6)(+3.7)(stat) +/- 4.4(syst)) MeV.

Measurement of the branching fractions of the rare decays B{sup 0}{yields}D{sub s}{sup (*)+}{pi}{sup -}, B{sup 0}{yields}D{sub s}{sup (*)+}{rho}{sup -}, and B{sup 0}{yields}D{sub s}{sup (*)-}K{sup (*)+}

We report the measurement of the branching fractions of the rare decays B{sup 0}{yields}D{sub s}{sup (*)+}{pi}{sup -}, B{sup 0}{yields}D{sub s}{sup (*)+}{rho}{sup -}, and B{sup 0}{yields}D{sub s}{sup (*)-}K{sup (*)+} in a sample of 381x10{sup 6}{upsilon}(4S) decays into BB pairs collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} storage ring. We present evidence for the decay B{sup 0}{yields}D{sub s}{sup -}K*{sup +} and the vector-vector decays B{sup 0}{yields}D{sub s}*{sup +}{rho}{sup -} and B{sup 0}{yields}D{sub s}*{sup -}K*{sup +}, as well as the first measurement of the vector meson polarization in these decays. We also determine the ratios of the CKM-suppressed to CKM-favored amplitudes r(D{sup (*)}{pi}) and r(D{sup (*)}{rho}) in decays B{sup 0}{yields}D{sup (*){+-}}{pi}{sup {+-}} and B{sup 0}{yields}D{sup (*){+-}}{rho}{sup {+-}}, and comment on the prospects for measuring the CP observable sin(2{beta}+{gamma})

Improved measurement of the CKM angle {gamma} in B{sup {+-}}{yields}D{sup (*)}K{sup (*){+-}} decays with a Dalitz plot analysis of D decays to K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} and K{sub S}{sup 0}K{sup +}K{sup -}

We report on an improved measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase {gamma} through a Dalitz plot analysis of neutral D meson decays to K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} and K{sub S}{sup 0}K{sup +}K{sup -} produced in the processes B{sup {+-}}{yields}DK{sup {+-}}, B{sup {+-}}{yields}D*K{sup {+-}} with D*{yields}D{pi}{sup 0}, D{gamma}, and B{sup {+-}}{yields}DK*{sup {+-}} with K*{sup {+-}}{yields}K{sub S}{sup 0}{pi}{sup {+-}}. Using a sample of 383x10{sup 6} BB pairs collected by the BABAR detector, we measure {gamma}=(76{+-}22{+-}5{+-}5) deg. (mod 180 deg.), where the first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the uncertainty on the description of the Dalitz plot distributions. The corresponding 2-standard-deviation region is 29 deg. <{gamma}<122 deg. This result has a significance of direct CP violation ({gamma}{ne}0) of 3.0 standard deviations.

Study of B{yields}X(3872)K, with X(3872){yields}J/{psi}{pi}{sup +}{pi}{sup -}

We present measurements of the decays B{sup +}{yields}X(3872)K{sup +} and B{sup 0}{yields}X(3872)K{sup 0} with X(3872){yields}J/{psi}{pi}{sup +}{pi}{sup -}. The data sample used, collected with the BABAR detector at the PEP-II e{sup +}e{sup -} asymmetric-energy storage ring, corresponds to 455x10{sup 6}BB pairs. Branching fraction measurements of B(B{sup +}{yields}X(3872)K{sup +})xB(X(3872){yields}J/{psi}{pi}{sup +}{pi}{sup -})=(8.4{+-}1.5{+-}0.7)x10{sup -6} and B(B{sup 0}{yields}X(3872)K{sup 0})xB(X(3872){yields}J/{psi}{pi}{sup +}{pi}{sup -})=(3.5{+-}1.9{+-}0.4)x10{sup -6} are obtained. We set an upper limit on the natural width of the X(3872) of {gamma}<3.3 MeV/c{sup 2} at the 90% confidence level.We present measurements of the decays B+ -> X(3872) K+ and B0 -> X(3872) K0 with X(3872) -> Jpsi pi+ pi-. The data sample used, collected with the BABAR detector at the PEP-II e+e- asymmetric-energy storage ring, corresponds to 455 x 10^6 BBbar pairs. Branching fraction measurements of BF(B+ -> X(3872) K+) x BF(X(3872) -> Jpsi pi+ pi-) = (8.4 +/- 1.5 +/- 0.7) x 10^{-6} and BF(B0 -> X(3872) K0) x BF(X(3872) -> Jpsi pi+ pi- = (3.5 +/- 1.9 +/- 0.4) x 10^{-6} are obtained. We set an upper limit on the natural width of the X(3872) of Gamma < 3.3 MeV/c^2 at the 90% confidence level.

Observation of B{sup +}{yields}{eta}{rho}{sup +} and search for B{sup 0} decays to {eta}'{eta}, {eta}{pi}{sup 0}, {eta}'{pi}{sup 0}, and {omega}{pi}{sup 0}

We present measurements of branching fractions for five B-meson decays to two-body charmless final states. The data, collected with the BABAR detector at the Stanford Linear Accelerator Center, represent 459×106 BB pairs. The results for branching fractions are, in units of 10-6 (upper limits at 90% C.L.), B(B+→ηρ+)=9.9±1.2±0.8, B(B0→η′η)=0.5±0.4±0.1(<1.2), B(B0→ηπ0)=0.9±0.4±0.1(<1.5), B(B0→η′π0)=0.9±0.4±0.1(<1.5), and B(B0→ωπ0)=0.07±0.26±0.02(<0.5). The first error quoted is statistical and the second systematic. For the ηρ+ mode, we measure the charge asymmetry Ach(B+→ηρ+)=0.13±0.11±0.02.

Time-dependent Dalitz plot analysis of B{sup 0}{yields}D{sup {+-}}K{sup 0}{pi}{sup {+-}} decays

We present for the first time a measurement of the weak phase 2 beta+gamma obtained from a time-dependent Dalitz plot analysis of B-0 ->(DK0)-K--/+pi(+/-) decays. Using a sample of approximately 347x10(6) B (B) over bar pairs collected by the BABAR detector at the PEP-II asymmetric-energy storage rings and assuming the ratio r of the b -> u and b -> c decay amplitudes to be 0.3, we obtain 2 beta+gamma=(83 +/- 53 +/- 20)degrees and the equivalent solution at +180 degrees. The magnitudes and phases for the resonances associated with the b -> c transitions are also extracted from the fit.