N. Dyce

A measurement of σtot (γp) at √s=210 GeV

Abstract The total photoproduction cross section is determined from a measurement of electroproduction with the ZEUS detector at HERA. The Q 2 values of the virtual photons are in the range 10 −7 Q 2 −2 GeV 2 . The γp total cross section in the γp centre of mass energy range 186–233 GeV is 154 ± 16 (stat.) ± 32 (syst.) μ b.

Measurement of [Formula presented] Branching Fractions and Charge Asymmetries

The branching fractions of the exclusive decays B0-->K(*0)gamma and B+-->K(*+)gamma are measured from a sample of (22.74+/-0.36)x10(6) BB decays collected with the BABAR detector at the PEP-II asymmetric e(+)e(-) collider. We find B (B0-->K(*0)gamma) = [4.23+/-0.40(stat)+/-0.22(syst)]x10(-5), B(B+-->K(*+)gamma) = [3.83+/-0.62(stat)+/-0.22(syst)]x10(-5) and constrain the CP-violating charge asymmetry to be -0.170K(*)gamma)<0.082 at 90% C.L.

Measurement of [Formula Presented] and [Formula Presented] production in [Formula Presented] meson decays and from continuum [Formula Presented] annihilation at [Formula Presented] GeV

Author(s): Aubert, B; Boutigny, D; Gaillard, JM; Hicheur, A; Karyotakis, Y; Lees, JP; Robbe, P; Tisserand, V; Palano, A; Pompili, A; Chen, GP; Chen, JC; Qi, ND; Rong, G; Wang, P; Zhu, YS; Eigen, G; Stugu, B; Abrams, GS; Borgland, AW; Breon, AB; Brown, DN; Button-Shafer, J; Cahn, RN; Clark, AR; Gill, MS; Gritsan, AV; Groysman, Y; Jacobsen, RG; Kadel, RW; Kadyk, J; Kerth, LT; Kolomensky, YG; Kral, JF; LeClerc, C; Levi, ME; Lynch, G; Oddone, PJ; Perazzo, A; Pripstein, M; Roe, NA; Romosan, A; Ronan, MT; Shelkov, VG; Telnov, AV; Wenzel, WA; Bright-Thomas, PG; Harrison, TJ; Hawkes, CM; Knowles, DJ; O Neale, SW; Penny, RC; Watson, AT; Watson, NK; Deppermann, T; Goetzen, K; Koch, H; Kunze, M; Lewandowski, B; Peters, K; Schmuecker, H; Steinke, M; Andress, JC; Barlow, NR; Bhimji, W; Chevalier, N; Clark, PJ; Cottingham, WN; Dyce, N; Foster, B; Mackay, C; Wallom, D; Wilson, FF; Abe, K; Hearty, C; Mattison, TS; McKenna, JA; Thiessen, D; Jolly, S; McKemey, AK; Blinov, VE; Bukin, AD; Bukin, DA; Buzykaev, AR; Golubev, VB | Abstract: New measurements of (Formula presented) and (Formula presented) meson production rates from B decays and from (Formula presented) continuum events near the (Formula presented) resonance are presented. Using 20.8 (Formula presented) of data on the (Formula presented) resonance and 2.6 (Formula presented) off-resonance, we find the inclusive branching fractions (Formula presented) and (Formula presented) where the first error is statistical, the second is systematic, and t he third is due to the (Formula presented) branching fraction uncertainty. The production cross sections (Formula presented) and (Formula presented) are measured at center-of-mass energies about 40 MeV below the (Formula presented) mass. The branching fractions (Formula presented) and (Formula presented) are determined from the (Formula presented) momentum spectra. The mass difference (Formula presented) is also measured.