2,611 research outputs found
Measurement of the Decays , and at Belle
No full textWe report a measurement of the branching fraction of the decay , evidence and a branching fraction measurement for , and the determination of the total branching fraction, including the resonant and non-resonant contributions to the channel. We also determine the -wave contribution within the mass region. The absolute branching fractions are , and , where the last systematic error is due to the branching fraction of . The branching fraction ratio is found to be . All results are based on a 121.4 fb data sample collected at the resonance by the Belle experiment at the KEKB asymmetric-energy collider
FIGURE 4. Tanycypris centa n in Nonmarine ostracods (Crustacea) from South Korea, including a description of a new species of Tanycypris Triebel (Cyprididae, Cypricercinae)
No full textFIGURE 4. Tanycypris centa n. sp. A, Mx (setae on endites not drawn) (NIBRIV0000243259). B, L5 (NIBRIV0000243259). C, L6 (NIBRIV0000243259). D, L7 (NIBRIV0000243259). E, CR (NIBRIV0000243259). F, CR attachment (NIBRIV0000243259).Published as part of Chang, Cheon Young, Lee, Jimin & Smith, Robin J., 2012, Nonmarine ostracods (Crustacea) from South Korea, including a description of a new species of Tanycypris Triebel (Cyprididae, Cypricercinae), pp. 1-19 in Zootaxa 3161 on page 7, DOI: 10.5281/zenodo.21422
Search for the decays
No full textInternational audienceWe report the results of a search for the B→Y(4260)K, Y(4260)→J/ψπ+π- decays. This study is based on a data sample corresponding to an integrated luminosity of 711 fb-1, collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We investigate the J/ψπ+π- invariant mass distribution in the range 4.0 to 4.6 GeV/c2 using both B+→J/ψπ+π-K+ and B0→J/ψπ+π-KS0 decays. We find excesses of events above the background levels, with significances of 2.1 and 0.9 standard deviations for charged and neutral B→Y(4260)K decays, respectively, taking into account the systematic uncertainties. These correspond to upper limits on the product of branching fractions, B(B+→Y(4260)K+)×B(Y(4260)→J/ψπ+π-)<1.4×10-5 and B(B0→Y(4260)K0)×B(Y(4260)→J/ψπ+π-)<1.7×10-5 at the 90% confidence level
Liquid entrainment and off-take through the break at the top of a vessel
No full textIn order to determine the bleed capacity of the safety depressurization system (SDS) of Advanced Power Reactor 1400 (APR1400) in the case of total loss of feed water (TLOFW), we performed an experimental study of liquid entrainment and liquid off-take from the swelled two-phase mixture surface in a vessel. A total of 220 experimental data on the entrainment and off-take are obtained using a test vessel with a height of 2.0 m and an inner diameter of 0.3 m and a top break with a diameter of 0.05 m. Two-phase mixture levels are measured by an ultrasonic sensor within +/- 1.77% with respect to the visual level data. Droplet entrainment data are obtained with and without the top break and are compared with the existing pool entrainment data. The present droplet entrainment data have higher values than the existing pool entrainment data due to (a) the pulling toward the break of the liquid deentrained on the top wall of the vessel and (b) gas acceleration in the vicinity of the break. In the present experiment, droplet entrainment, E-fg, strongly depends upon j(g)(*)/h* and is proportional to the seventh power of j(g)(*)/h* in the same way as the off-take data. The empirical correlation for the onset of off-take is developed in terms of the Froude number (Fr-g) at the break and the non-dimensional inception height (h(b)/d). This correlation shows agreement with the present experimental data within +/- 15%. The present off-take quality data show agreement with Schrock's off-take quality correlation with the rms error of 15.8%. (c) 2005 Elsevier B.V. All rights reserved
Observation of B-→J/ψΛp̄ and searches for B-→J/ψΣ0p̄ and B0→J/ψpp̄ decays
No full textWe report the observation of B-→J/ψΛp̄ and searches for B-→J/ψΣ0p̄ and B0→J/ψpp̄ decays, using a sample of 275×106 BB̄ pairs collected with the Belle detector at the Υ(4S) resonance. We observe a signal of 17.2±4.1 events with a significance of 11.1σ and obtain a branching fraction of B(B-→J/ψΛp̄)=11.6±2.8(stat)-2.3+1.8(sys)×10-6. No signal is found for either of the two decay modes, B-→J/ ψΣ0p̄ and B0→J/ψpp̄, and upper limits for the branching fractions are determined to be B(B-→J/ψΣ0p̄)<1. 1×10-5 and B(B0→J/ψpp̄)<8.3×10-7 at 90% confidence level. © 2005 The American Physical Society.LPH
FIGURE 9. A & B, Bradleytriebella tuberculata. A in Two new species of non-marine Ostracoda (Crustacea) of the genera Vestalenula Rossetti & Martens, 1998 (Darwinuloidea) and Microloxoconcha Hartmann, 1954 (Cytheroidea) from Tsushima, Japan, and a summary of the non-marine ostracod fauna of the island
No full textFIGURE 9. A & B, Bradleytriebella tuberculata. A, female, RV, ext. B, female, LV, int. C & D, Cavernocypris cavernosa. C, female, RV, ext. D, female, LV, int. E & F, Hemicypris posterotruncata. E, female, LV, ext. B, female, RV, int. G & H, Dolerocypris ikeyai. G, female, LV, ext. H, female, RV, int. I & J, Dolerocypris fasciata. I, female, LV, int. J, female, RV, int. K & L, Candonocypris caledonica sensu Okubo 2004. K, female, LV, int. L, female, RV, int. M & N, Stenocypris hirutai. M, female, RV, int. L, female, LV, int. O & P, Stenocypris hislopi. O, female, RV, ext. P, female, LV, int. Q & R, Scottia pseudobrowniana. Q, female, LV, ext. R, female, RV, int. Scale bar = 463 µm for A & B, 321 µm for C & D, 652 µm for E & F, 634 µm for G & H, 935 µm for I & J, 950 µm for K & L, 1007 µm for M & N, 960 µm for O & P, and 459 µm for Q & R.Published as part of Smith, Robin James & Chang, Cheon Young, 2022, Two new species of non-marine Ostracoda (Crustacea) of the genera Vestalenula Rossetti & Martens, 1998 (Darwinuloidea) and Microloxoconcha Hartmann, 1954 (Cytheroidea) from Tsushima, Japan, and a summary of the non-marine ostracod fauna of the island, pp. 529-555 in Zootaxa 5150 (4) on page 549, DOI: 10.11646/zootaxa.5150.4.4, http://zenodo.org/record/662690
Observation of B-s(0) -> J/psi f(0)(980) and Evidence for B-s(0) -> J/psi f(0)(1370)
No full textWe report the observation of B-s(0) -> J/psi f(0(980)) and evidence for B-s(0) -> J/psi f(0)(1370), which are CP eignstate decay modes. These results are obtained from 121.4 fb(-1) of data collected at the Y(5S) resonance with the Belle detector at the KEKB e(+)e(-) collider. We measure the branching fractions B(B-s(0) -> J/psi f(0)(980); f(0)(980) -> pi(+)pi(-)) = (1.16(-0.19)(+0.31)(stat)(-0.17)(+0.15)(syst)(-0.18)(+0.26)(N-Bs(*)(B) over bars(*))) X 10(-4) with a significance of 8.4 sigma, and B(B-s(0) -> j/psi f(0)(1370); f(0)(1370) -> pi(+)pi(-)) = (0.34(-0.14)(+0.11)(stat)(-0.02)(+0.03)(syst)(-0.05)(+0.08) (N-Bs(*)(B) over bars(*))) X 10(-4) with a significance of 4.2 sigma. The last error listed is due to uncertainty in the number of produced B-s((*)) (B) over bar ((*))(s) pairs.LPH
Search for CP violating charge asymmetry in B^+ -> J/psi K^+ decays
No full textWe present the result of a search for charge asymmetry in B^+ -> J/psi K^+ decays. The CP-violating charge asymmetry is measured to be A_CP(B^+ -> J/psi K^+) = [-0.76 +/- 0.50 (stat) +/- 0.22 (syst)]%
Nonmarine Ostracoda (Crustacea) from Jeju Island, South Korea, including descriptions of two new species
No full textFigure 5. (A–E) Cypretta karanovicae n. sp.: (A) left view of female carapace (paratype, DB40043); (B) internal view of female left valve (holotype, NIBRIV0000297035); (C) internal view of female right valve (holotype, NIBRIV0000297035); (D) dorsal view of female carapace, anterior to right (paratype, DB40043); (E) ventral view of female carapace, anterior to right (paratype, DB40043). (F–J) Cypretta seurati: (F) left view of female carapace (DB40038); (G) internal view of female left valve (DB40039); (H) internal view of female right valve (DB40039); (I) dorsal view of female carapace, anterior to right (DB40038); (J) dorsal view of female carapace, anterior to right (DB40040). Scale bar = 300 µm.Published as part of Smith, Robin James, Lee, Jimin & Chang, Cheon Young, 2014, Nonmarine Ostracoda (Crustacea) from Jeju Island, South Korea, including descriptions of two new species, pp. 37-76 in Journal of Natural History 49 (1) on page 54, DOI: 10.1080/00222933.2014.946110, http://zenodo.org/record/400251
{Measurement of the B+/B0 production ratio in e+e- collisions at the \Upsilon{}(4S) resonance using B\textrightarrow{}J/\ensuremath{\psi}(\ensuremath{\ell}\ensuremath{\ell})K decays at Belle}
No full textWe measure the ratio of branching fractions for the Υ(4S) decays to B+B- and B0B ̄0 using B+→J/ψ(ll)K+ and B0→J/ψ(ll)K0 samples, where J/ψ(ll) stands for J/ψ→l+l- (l=e or μ), with 711 fb-1 of data collected at the Υ(4S) resonance with the Belle detector. We find the decay rate ratio of Υ(4S)→B+B- over Υ(4S)→B0B ̄0 to be 1.065±0.012±0.019±0.047, which is the most precise measurement to date. The first and second uncertainties are statistical and systematic, respectively, and the third uncertainty is due to the assumption of isospin symmetry in B→J/ψ(ll)K
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