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Start Over Author "Wallom, D." Publisher escholarship, university of california
27 results on '"Wallom, D."'

1. Half a degree additional warming, prognosis and projected impacts (HAPPI): Background and experimental design

Author

Mitchell, D, AchutaRao, K, Allen, M, Bethke, I, Beyerle, U, Ciavarella, A, Forster, PM, Fuglestvedt, J, Gillett, N, Haustein, K, Ingram, W, Iversen, T, Kharin, V, Klingaman, N, Massey, N, Fischer, E, Schleussner, CF, Scinocca, J, Seland, Ø, Shiogama, H, Shuckburgh, E, Sparrow, S, Stone, D, Uhe, P, Wallom, D, Wehner, M, and Zaaboul, R

Subjects
Earth Sciences
Abstract

The Intergovernmental Panel on Climate Change (IPCC) has accepted the invitation from the UNFCCC to provide a special report on the impacts of global warming of 1.5 °C above pre-industrial levels and on related global greenhouse-gas emission pathways. Many current experiments in, for example, the Coupled Model Inter-comparison Project (CMIP), are not specifically designed for informing this report. Here, we document the design of the half a degree additional warming, projections, prognosis and impacts (HAPPI) experiment. HAPPI provides a framework for the generation of climate data describing how the climate, and in particular extreme weather, might differ from the present day in worlds that are 1.5 and 2.0 °C warmer than pre-industrial conditions. Output from participating climate models includes variables frequently used by a range of impact models. The key challenge is to separate the impact of an additional approximately half degree of warming from uncertainty in climate model responses and internal climate variability that dominate CMIP-style experiments under low-emission scenarios. Large ensembles of simulations (> 50 members) of atmosphere-only models for three time slices are proposed, each a decade in length: the first being the most recent observed 10-year period (2006-2015), the second two being estimates of a similar decade but under 1.5 and 2 °C conditions a century in the future. We use the representative concentration pathway 2.6 (RCP2.6) to provide the model boundary conditions for the 1.5 °C scenario, and a weighted combination of RCP2.6 and RCP4.5 for the 2 °C scenario.

Published
2017

2. Measurement of branching fractions for exclusive B decays to charmonium final states

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Clark, AR, Gill, MS, Gritsan, A, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kluth, S, Kolomensky, YG, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, A, Momayezi, M, 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, Kirk, A, Knowles, DJ, O'Neale, SW, Penny, RC, Watson, AT, Watson, NK, Deppermann, T, Goetzen, K, Koch, H, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, and Salnikov, AA

Subjects
hep-ex, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics
Abstract

We report branching fraction measurements for exclusive decays of charged and neutral B mesons into two-body final states containing a charmonium meson. We use a sample of 22.72±0.36 million BB̄ events collected between October 1999 and October 2000 with the BABAR detector at the PEP-II storage rings at the Stanford Linear Accelerator Center. The charmonium mesons considered here are J/Ψ, Ψ(2S), and Χ c1and the light meson in the decay is either a K, K*, or π 0. © 2002 The American Physical Society.

Published
2002

3. Measurement of Ds+ and Ds*+ production in B meson decays and from continuum e+e- annihilation at s=10.6 GeV

Author

Aubert, B, Boutigny, D, Gaillard, J-M, 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, Yu G, 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, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, Serednyakov, SI, Skovpen, Yu I, Telnov, VI, Yushkov, AN, Best, D, Chao, M, Lankford, AJ, Mandelkern, M, McMahon, S, and Stoker, DP

Subjects
Down Syndrome, Brain Disorders, Intellectual and Developmental Disabilities (IDD), hep-ex, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
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. © 2002 The American Physical Society.

Published
2002

4. Measurement of Ds+ and Ds*+ production in B meson decays and from continuum e+e- annihilation at √s = 10.6 GeV

Author

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, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, Serednyakov, SI, Skovpen, YI, Telnov, VI, Yushkov, AN, Best, D, Chao, M, Lankford, AJ, Mandelkern, M, McMahon, S, and Stoker, DP

Subjects
hep-ex, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract

New measurements of Ds+ and Ds*+ meson production rates from B decays and from qq̄ continuum events near the Y(4S) resonance are presented. Using 20.8 fb-1 of data on the Y(4S) resonance and 2.6 fb-1 off-resonance, we find the inclusive branching fractions B(B→Ds+ X)=(10.93±0.19±0.58±2.73)% and B(B→Ds*+X)=(7.9±0.8±0.7 ±2.0)%, where the first error is statistical, the second is systematic, and the third is due to the Ds+→φπ+ branching fraction uncertainty. The production cross sections σ(e+e- →Ds+X) × B(Ds+→φπ+)=7.55±0.20 ±0.34 pb and σ(e+e-→Ds *±X) × B(Ds+→φπ+) = 5.8±0.7±0.5 pb are measured at center-of-mass energies about 40 MeV below the Y(4S) mass. The branching fractions ΣB(B→Ds(*)+ D̄(*))=(5.07±0.14±0.30±1.27)% and ∑B(B→Ds*+D̄(*)) =(4.1±0.2±0.4±1.0)% are determined from the Ds(*)+ momentum spectra. The mass difference m(Ds+)-m(D+)=98.4±0.1 ±0.3 MeV/c2 is also measured.

Published
2002

5. Study of CP-violating asymmetries in B0→π+π-, K+π- decays

Author

Aubert, B, Boutigny, D, Gaillard, J-M, 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, Yu G, 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, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, Serednyakov, SI, Skovpen, Yu I, Telnov, VI, Yushkov, AN, Best, D, Chao, M, Lankford, AJ, Mandelkern, M, McMahon, S, and Stoker, DP

Subjects
hep-ex, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract

We present a measurement of the time-dependent CP-violating asymmetries in neutral B decays to the eigenstate, and an updated measurement of the charge asymmetry in B0→K+π-~ decays. In a sample of 33 million Y(4S)→BB̄ decays collected with the BABAR detector at the SLAC PEP-II asymmetric B factory, we find 65-11+12 and 217±18 K+π- candidates and measure the asymmetry parameters Sππ=0.03-0.56+0.53±0.111, Cππ=-0.25-0.17+0.45±0.14, and AKπ = -0.07±0. 08±0.02, where the first error is statistical and the second is systematic. © 2002 The American Physical Society.

Published
2002

6. Measurement of B --> K*gamma branching fractions and charge asymmetries.

Author

Aubert, B, Boutigny, D, Gaillard, J-M, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, 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, Kluth, S, Kolomensky, Yu G, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, Oddone, PJ, Perazzo, A, Pripstein, M, Roe, NA, Romosan, A, Ronan, MT, Shelkov, VG, Telnov, AV, Wenzel, WA, Zisman, MS, Bright-Thomas, PG, Harrison, TJ, Hawkes, CM, Knowles, DJ, O'Neale, SW, Penny, RC, Watson, AT, Watson, NK, Deppermann, T, Goetzen, K, Koch, H, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, and Serednyakov, SI

Subjects
BABAR Collaborations, hep-ex, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

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)

Published
2002

7. Measurement of the branching fractions for ψ(2S)→e+e- and ψ(2S)→μ+μ-

Author

Aubert, B, Boutigny, D, Gaillard, J-M, 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, Reinertsen, PL, 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, Yu G, Kral, JF, LeClerc, C, Levi, ME, Liu, T, 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, De Groot, N, Dyce, N, Foster, B, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, Serednyakov, SI, Skovpen, Yu I, Telnov, VI, Yushkov, AN, Best, D, and Lankford, AJ

Subjects
hep-ex, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract

We measure the branching fractions of the Ψ(2S) meson to the leptonic final states e+e- and μ+μ- relative to that for Ψ(2S)→J/Ψπ_. The method uses Ψ(2S) mesons produced in the decay of B mesons at the Y(45) resonance in a data sample collected with the BABAR detector at the Stanford Linear Accelerator Center. Using previous measurements for the Ψ(2S) →J/Ψπ+π- branching fraction, we determine the e+e- and π+π- branching fractions to be 0.0078±0.0009±0.0008 and 0.0067±0. 0008±0.0007, respectively. © 2001 The American Physical Society.

Published
2002

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

Author

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, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, Serednyakov, SI, Skovpen, YI, Telnov, VI, Yushkov, AN, Best, D, Chao, M, Lankford, AJ, Mandelkern, M, McMahon, S, and Stoker, DP

Subjects
Brain Disorders, Intellectual and Developmental Disabilities (IDD), Down Syndrome, hep-ex, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics
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. © 2002 The American Physical Society.

Published
2002

9. Measurement of the branching fractions for Ψ(2S)→e +e- and Ψ(2S)→μ+-

Author

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, Reinertsen, PL, 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, Liu, T, 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, de Groot, N, Dyce, N, Foster, B, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, Serednyakov, SI, Skovpen, YI, Telnov, VI, Yushkov, AN, Best, D, and Lankford, AJ

Subjects
hep-ex, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics
Abstract

We measure the branching fractions of the Ψ(2S) meson to the leptonic final states e+e- and μ+μ- relative to that for Ψ(2S)→J/Ψπ_. The method uses Ψ(2S) mesons produced in the decay of B mesons at the Y(45) resonance in a data sample collected with the BABAR detector at the Stanford Linear Accelerator Center. Using previous measurements for the Ψ(2S) →J/Ψπ+π- branching fraction, we determine the e+e- and π+π- branching fractions to be 0.0078±0.0009±0.0008 and 0.0067±0. 0008±0.0007, respectively. © 2001 The American Physical Society.

Published
2002

10. Search for the decay B0-->gammagamma.

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Clark, AR, Gill, MS, Gritsan, A, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kluth, S, Kolomensky, YG, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, 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, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, Serednyakov, SI, and Skovpen, YI

Subjects
BABAR Collaboration, hep-ex, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

We present a limit on the branching fraction for the decay B0-->gammagamma using data collected at the Upsilon(4S) resonance with the BABAR detector at the PEP-II asymmetric energy e+e- collider. Based on the observation of one event in the signal region, out of a sample of 21.3x10(6) e+e--->Upsilon(4S)-->BB decays, we establish an upper limit on the branching fraction of B(B0-->gammagamma)

Published
2001

11. Measurement of the B--> J/psiK*(892) decay amplitudes.

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Clark, AR, Gill, MS, Gritsan, A, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kluth, S, Kolomensky, YG, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, 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, Kirk, A, Knowles, DJ, O'Neale, SW, Penny, RC, Watson, AT, Watson, NK, Deppermann, T, Goetzen, K, Koch, H, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, and Serednyakov, SI

Subjects
BABAR Collaboration, hep-ex, General Physics, Mathematical Sciences, Physical Sciences, Engineering
Abstract

We present a measurement of the decay amplitudes in B-->J/psiK*(892) channels using 20.7 fb(-1) of data collected at the Upsilon(4S) resonance with the BABAR detector at PEP-II. We measure a P-wave fraction R(perpendicular) = (16.0 +/- 3.2 +/- 1.4)% and a longitudinal polarization fraction (59.7 +/- 2.8 +/- 2.4)%. The measurement of a relative phase that is neither 0 nor pi, phi = 2.50 +/- 0.20 +/-0.08 radians, favors a departure from the factorization hypothesis. Although the decay B-->/psiK(pi) proceeds mainly via K*(892), there is also evidence for K2*(1430) and K(pi) S-wave contributions.

Published
2001

12. Measurements of the branching fractions of exclusive charmless B meson decays with eta(') or omega mesons.

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Clark, AR, Gill, MS, Gritsan, A, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kluth, S, Kolomensky, YG, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, 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, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, Serednyakov, SI, and Skovpen, YI

Subjects
BARBAR Collaboration, Prevention, Complementary and Integrative Health, hep-ex, General Physics, Mathematical Sciences, Physical Sciences, Engineering
Abstract

We present the results of searches for B decays to charmless two-body final states containing eta(') or omega mesons, based on 20.7 fb(-1) of data collected with the BABAR detector. We find the branching fractions Beta(B(+)-->eta(')K(+)) = (70+/-8+/-5) x 10(-6), Beta(B(0)-->eta(')K(0)) = (42(+13)(-11) +/- 4) x 10(-6), and Beta(B(+)-->omega pi(+)) = (6.6(+2.1)(-1.8) +/- 0.7) x 10(-6), where the first error quoted is statistical and the second is systematic. We give measurements of four additional modes for which the 90% confidence level upper limits are Beta(B(+)-->eta(')pi(+)) < 12 x 10(-6), Beta(B(+)-->omega K(+)) < 4 x 10(-6), Beta(B(0)-->omega K(0)) < 13 x 10(-6), and Beta(B(0)-->omega pi(0)) < 3 x 10(-6).

Published
2001

13. Measurement of the B(0) and B(+) meson lifetimes with fully reconstructed hadronic final states.

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Clark, AR, Gill, MS, Gritsan, A, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kluth, S, Kolomensky, YG, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, 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, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, Serednyakov, SI, and Skovpen, YI

Subjects
BABAR Collaboration, hep-ex, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

The B(0) and B(+) meson lifetimes have been measured in e(+)e(-) annihilation data collected in 1999 and 2000 with the BABAR detector at center-of-mass energies near the Upsilon(4S) resonance. Events are selected in which one B meson is fully reconstructed in a hadronic final state while the second B meson is reconstructed inclusively. A combined fit to the B(0) and the B(+) decay time difference distributions yields tau(B(0)) = 1.546+/-0.032(stat)+/-0.022(syst) ps, tau(B(+)) = 1.673+/-0.032(stat)+/-0.023(syst) ps, and tau(B(+))/tau(B(0)) = 1.082+/-0.026(stat)+/-0.012(syst).

Published
2001

14. Measurement of the decays B--> phiK and B--> phiK*.

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Clark, AR, Fan, Q, Gill, MS, Gowdy, SJ, Gritsan, A, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kluth, S, Kolomensky, YG, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, 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, Kirk, A, Knowles, DJ, O'Neale, SW, Penny, RC, Watson, AT, Watson, NK, Deppermann, T, Koch, H, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, Mass, A, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Camanzi, B, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Dubrovin, MS, Golubev, VB, Ivanchenko, VN, and Korol, AA

Subjects
BARBAR Collaboration, hep-ex, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

We have observed the decays B--> phiK and phiK(*) in a sample of over 45 million B mesons collected with the BABAR detector at the PEP-II collider. The measured branching fractions are B(B+--> phiK+) = (7.7(+1.6)(-1.4)+/-0.8)x10(-6), B(B0--> phiK0) = (8.1(+3.1)(-2.5)+/-0.8)x10(-6), B(B+--> phiK(*+)) = (9.7(+4.2)(-3.4)+/-1.7)x10(-6), and B(B0--> phiK(*0)) = (8.7(+2.5)(-2.1)+/-1.1)x10(-6). We also report the upper limit B(B+--> phipi(+))

Published
2001

15. Measurement of J/psi production in continuum e(+)e(-) annihilations near square root of s = 10.6 GeV.

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Clark, AR, Fan, Q, Gill, MS, Gritsan, A, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kluth, S, Kolomensky, YG, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, 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, Kirk, A, Knowles, DJ, O'Neale, SW, Penny, RC, Watson, AT, Watson, NK, Deppermann, T, Goetzen, K, Koch, H, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, Mass, A, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Camanzi, B, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Dubrovin, MS, Golubev, VB, Ivanchenko, VN, and Korol, AA

Subjects
BABAR Collaboration, hep-ex, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

The production of J/psi mesons in continuum e(+)e(-) annihilations has been studied with the BABAR detector at energies near the Upsilon(4S) resonance. The mesons are distinguished from J/psi production in B decays through their center-of-mass momentum and energy. We measure the cross section e(+)e(-)-->J/psi X to be 2.52+/-0.21+/-0.21 pb. We set a 90% C.L. upper limit on the branching fraction for direct Upsilon(4S)-->J/psi X decays at 4.7 x 10(-4).

Published
2001

16. Measurement of branching fractions and search for CP-violating charge asymmetries in charmless two-body B decays into pions and kaons.

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Clark, AR, Fan, Q, Gill, MS, Gowdy, SJ, Gritsan, A, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kluth, S, Kolomensky, YG, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, 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, Kirk, A, Knowles, DJ, O'Neale, SW, Penny, RC, Watson, AT, Watson, NK, Deppermann, T, Koch, H, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, Mass, A, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Camanzi, B, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Dubrovin, MS, Golubev, VB, Ivanchenko, VN, and Korol, AA

Subjects
BABAR Collaboration, hep-ex, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

We present measurements, based on a sample of approximately 23x10(6) BB pairs, of the branching fractions and a search for CP-violating charge asymmetries in charmless hadronic decays of B mesons into two-body final states of kaons and pions. We find the branching fractions B(B0-->pi(+)pi(-)) = (4.1+/-1.0+/-0.7)x10(-6), B(B0-->K+pi(-)) = (16.7+/-1.6+/-1.3)x10(-6), B(B+-->K+pi(0)) = (10.8(+2.1)(-1.9)+/-1.0)x10(-6), B(B+-->K0pi(+)) = (18.2(+3.3)(-3.0)+/-2.0)x10(-6), B(B0-->K0pi(0)) = (8.2(+3.1)(-2.7)+/-1.2)x10(-6). We also report 90% confidence level upper limits for B meson decays to the pi(+)pi(0), K+K-, and K0K+ final states. In addition, charge asymmetries have been found to be consistent with zero, where the statistical precision is in the range of +/-0.10 to +/-0.18, depending on the decay mode.

Published
2001

17. Observation of CP violation in the B(0) meson system.

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, 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, Kluth, S, Kolomensky, YG, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, Oddone, PJ, Perazzo, A, Pripstein, M, Roe, NA, Romosan, A, Ronan, MT, Shelkov, VG, Telnov, AV, Wenzel, WA, Zisman, MS, Bright-Thomas, PG, Harrison, TJ, Hawkes, CM, Knowles, DJ, O'Neale, SW, Penny, RC, Watson, AT, Watson, NK, Deppermann, T, Goetzen, K, Koch, H, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, and Serednyakov, SI

Subjects
BABAR Collaboration, hep-ex, General Physics, Mathematical Sciences, Physical Sciences, Engineering
Abstract

We present an updated measurement of time-dependent CP-violating asymmetries in neutral B decays with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. This result uses an additional sample of Upsilon(4S) decays collected in 2001, bringing the data available to 32 x 10(6) BB macro pairs. We select events in which one neutral B meson is fully reconstructed in a final state containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2 beta, is derived from the decay time distributions in such events. The result sin2 beta = 0.59+/-0.14(stat)+/-0.05(syst) establishes CP violation in the B(0) meson system. We also determine absolute value of lambda = 0.93+/-0.09(stat)+/-0.03(syst), consistent with no direct CP violation.

Published
2001

18. The ocean sampling day consortium

Author

Kopf, A, Bicak, M, Kottmann, R, Schnetzer, J, Kostadinov, I, Lehmann, K, Fernandez-Guerra, A, Jeanthon, C, Rahav, E, Ullrich, M, Wichels, A, Gerdts, G, Polymenakou, P, Kotoulas, G, Siam, R, Abdallah, RZ, Sonnenschein, EC, Cariou, T, O'Gara, F, Jackson, S, Orlic, S, Steinke, M, Busch, J, Duarte, B, Caçador, I, Canning-Clode, J, Bobrova, O, Marteinsson, V, Reynisson, E, Loureiro, CM, Luna, GM, Quero, GM, Löscher, CR, Kremp, A, DeLorenzo, ME, Øvreås, L, Tolman, J, LaRoche, J, Penna, A, Frischer, M, Davis, T, Katherine, B, Meyer, CP, Ramos, S, Magalhães, C, Jude-Lemeilleur, F, Aguirre-Macedo, ML, Wang, S, Poulton, N, Jones, S, Collin, R, Fuhrman, JA, Conan, P, Alonso, C, Stambler, N, Goodwin, K, Yakimov, MM, Baltar, F, Bodrossy, L, Van De Kamp, J, Frampton, DMF, Ostrowski, M, Van Ruth, P, Malthouse, P, Claus, S, Deneudt, K, Mortelmans, J, Pitois, S, Wallom, D, Salter, I, Costa, R, Schroeder, DC, Kandil, MM, Amaral, V, Biancalana, F, Santana, R, Pedrotti, ML, Yoshida, T, Ogata, H, Ingleton, T, Munnik, K, Rodriguez-Ezpeleta, N, Berteaux-Lecellier, V, Wecker, P, Cancio, I, Vaulot, D, Bienhold, C, Ghazal, H, Chaouni, B, Essayeh, S, Ettamimi, S, Zaid, EH, Boukhatem, N, Bouali, A, Chahboune, R, Barrijal, S, Timinouni, M, El Otmani, F, Bennani, M, and Mea, M

Subjects
Microorganism, Standards, Bacteria, Marine, Oceans and Seas, Marine Biology, Biodiversity, Genomics, Health Index, OSD, Micro B3, Database Management Systems, Ocean sampling day, Metagenomics, Life Below Water
Abstract

© 2015 Kopf et al. Ocean Sampling Day was initiated by the EU-funded Micro B3 (Marine Microbial Biodiversity, Bioinformatics, Biotechnology) project to obtain a snapshot of the marine microbial biodiversity and function of the world's oceans. It is a simultaneous global mega-sequencing campaign aiming to generate the largest standardized microbial data set in a single day. This will be achievable only through the coordinated efforts of an Ocean Sampling Day Consortium, supportive partnerships and networks between sites. This commentary outlines the establishment, function and aims of the Consortium and describes our vision for a sustainable study of marine microbial communities and their embedded functional traits.

Published
2015

19. Measurement of Ds+and Ds*+production in B meson decays and from continuum e+e-annihilation at √s = 10.6 GeV

Author

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, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, Serednyakov, SI, Skovpen, YI, Telnov, VI, Yushkov, AN, Best, D, Chao, M, Lankford, AJ, Mandelkern, M, McMahon, S, and Stoker, DP

Abstract

New measurements of Ds+and Ds*+meson production rates from B decays and from qq̄ continuum events near the Y(4S) resonance are presented. Using 20.8 fb-1of data on the Y(4S) resonance and 2.6 fb-1off-resonance, we find the inclusive branching fractions B(B→Ds+X)=(10.93±0.19±0.58±2.73)% and B(B→Ds*+X)=(7.9±0.8±0.7 ±2.0)%, where the first error is statistical, the second is systematic, and the third is due to the Ds+→φπ+branching fraction uncertainty. The production cross sections σ(e+e-→Ds+X) × B(Ds+→φπ+)=7.55±0.20 ±0.34 pb and σ(e+e-→Ds*±X) × B(Ds+→φπ+) = 5.8±0.7±0.5 pb are measured at center-of-mass energies about 40 MeV below the Y(4S) mass. The branching fractions ΣB(B→Ds(*)+D̄(*))=(5.07±0.14±0.30±1.27)% and ∑B(B→Ds*+D̄(*)) =(4.1±0.2±0.4±1.0)% are determined from the Ds(*)+momentum spectra. The mass difference m(Ds+)-m(D+)=98.4±0.1 ±0.3 MeV/c2is also measured.

Published
2002

20. Measurement of [Formula presented] Branching Fractions and Charge Asymmetries

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, 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, Kluth, S, Kolomensky, YG, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, Oddone, PJ, Perazzo, A, Pripstein, M, Roe, NA, Romosan, A, Ronan, MT, Shelkov, VG, Telnov, AV, Wenzel, WA, Zisman, MS, Bright-Thomas, PG, Harrison, TJ, Hawkes, CM, Knowles, DJ, O'Neale, SW, Penny, RC, Watson, AT, Watson, NK, Deppermann, T, Goetzen, K, Koch, H, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, and Serednyakov, SI

Subjects
High Energy Physics::Experiment
Abstract

The branching fractions of the exclusive decays [Formula presented] and [Formula presented] are measured from a sample of [Formula presented] [Formula presented] decays collected with the BABAR detector at the PEP-II asymmetric [Formula presented] collider. We find [Formula presented], [Formula presented] and constrain the [Formula presented]-violating charge asymmetry to be [Formula presented] at [Formula presented] C.L. © 2002 The American Physical Society.

Published
2002

21. Measurement of the B → J/ΨK* (892) decay amplitudes

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Clark, AR, Gill, MS, Gritsan, A, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kluth, S, Kolomensky, YG, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, 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, Kirk, A, Knowles, DJ, O’neale, SW, Penny, RC, Watson, AT, Watson, NK, Deppermann, T, Goetzen, K, Koch, H, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, and Serednyakov, SI

Abstract

We present a measurement of the decay amplitudes in B → J/ΨK* channels using 20.7 fb−1 of data collected at the ϒ(4S) resonance with the BABAR detector at PEP-II. We measure a P-wave fraction R⊥=(16.0°3.2°1.4)% and a longitudinal polarization fraction (59.7°2.8°2.4)%. The measurement of a relative phase that is neither 0 nor π, ψ‖ = 2.50°0.20°0.08 radians, favors a departure from the factorization hypothesis. Although the decay B → J/ΨKπ proceeds mainly via K*(892), there is also evidence for K*2(1430) and KπS-wave contributions. © 2001 The American Physical Society.

Published
2001

22. Search for the decay B^0 → gamma-gamma

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Clark, AR, Gill, MS, Gritsan, A, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kluth, S, Kolomensky, YG, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, 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, Kirk, A, Knowles, DJ, O’neale, SW, Penny, RC, Watson, AT, Watson, NK, Deppermann, T, Goetzen, K, Koch, H, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, and Serednyakov, SI

Abstract

We present a limit on the branching fraction for the decay B0→ ϒϒ using data collected at the ϒ(4S) resonance with the BABAR detector at the PEP-II asymmetric energy e+e− collider. Based on the observation of one event in the signal region, out of a sample of 21.3 · 106 e+e− → ϒ(4S) → BB― decays, we establish an upper limit on the branching fraction of B(B0→ ϒϒ) < 1.7 · 10−6 at the 90% confidence level. This result substantially improves upon existing limits. © 2001 The American Physical Society.

Published
2001

23. Measurement of the decays B → φK and B → φK

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Clark, AR, Fan, Q, Gill, MS, Gowdy, SJ, Gritsan, A, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kluth, S, Kolomensky, YG, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, 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, Kirk, A, Knowles, DJ, O'Neale, SW, Penny, RC, Watson, AT, Watson, NK, Deppermann, T, Koch, H, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, Mass, A, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Camanzi, B, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Dubrovin, MS, Golubev, VB, Ivanchenko, VN, and Korol, AA

Abstract

We have observed the decays B → φK and B → φK* in a sample of over 45 million B mesons collected with the BABAR detector at the PEP-II collider. The measured branching fractions are B(B + → φK + ) = (7.7 +1.6 −1.4 ± 0.8) × 10 −6 , B(B 0 → φK 0 ) = (8.1 +3.1 −2.5 ± 0.8) × 10 −6 , B(B + → φK* + ) = (9.7 +4.2 −3.4 ± 1.7) × 10 −6 , and B(B 0 → φK *0 ) = (8.7 +2.5 −2.1 ± 1.1) × 10 −6 . We also report the upper limit B(B + → φπ + ) < 1.4 × 10 −6 (90% C.L.). © 2001 The American Physical Society.

Published
2001

24. Observation of CP violation in the B0meson system

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, 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, Kluth, S, Kolomensky, YG, Kral, JF, LeClerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, Oddone, PJ, Perazzo, A, Pripstein, M, Roe, NA, Romosan, A, Ronan, MT, Shelkov, VG, Telnov, AV, Wenzel, WA, Zisman, MS, Bright-Thomas, PG, Harrison, TJ, Hawkes, CM, Knowles, DJ, O'Neale, SW, Penny, RC, Watson, AT, Watson, NK, Deppermann, T, Goetzen, K, Koch, H, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, McFall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, McKenna, JA, Thiessen, D, Jolly, S, McKemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, and Serednyakov, SI

Subjects
High Energy Physics::Experiment
Abstract

We present an updated measurement of time-dependent CP-violating asymmetries in neutral B decays with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. This result uses an additional sample of γ(4S)decays collected in 2001, bringing the data available to 32 ×106BB¯We select events in which one neutral B meson is fully reconstructed in a final state containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2β, is derived from the decay time distributions in such events. The result sin2β=0.59 ± 0.14(stat)±0.05(syst) establishes CP violation in the B0meson system. We also determine |λ|= 0.93±0.09(stat)±0.03(syst), consistent with no direct CP violation. © 2001 The American Physical Society.

Published
2001

25. Measurements of the branching fractions of exclusive charmless B meson decays with η′ or ω mesons

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Clark, AR, Gill, MS, Gritsan, A, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kluth, S, Kolomensky, YG, Kral, JF, Le Clerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, 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, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, Mc Fall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, Mc Kenna, JA, Thiessen, D, Jolly, S, Mc Kemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, Serednyakov, SI, and Skovpen, YI

Abstract

We present the results of searches for B decays to charmless two-body final states containing η′ or ω mesons, based on 50.7fb-1of data collected with the BABAR detector. We find the branching fractions B(B+→ η′K+) = (70 ± 8 ± 5) × 10-6, B(B0→ η′K0) = (42+13-11± 4) × 10-6, and B(B+→ ωπ+) = (6.6+2.1-1.8± 0.7) × 10-6, where the first error quoted is statistical and the second is systematic. We give measurements of four additional modes for which the 90% confidence level upper limits are B(B+→ η′π+) < 12 × 10-6, B(B+→ ωK+) < 4 × 10-6, B(B0→ ωK0) < 13 × 10-6, and B(B0→ ωπ0) < 3 × 10-6. © 2001 The American Physical Society.

Published
2001

26. Measurement of the B0and B+meson lifetimes with fully reconstructed hadronic final states

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Clark, AR, Gill, MS, Gritsan, A, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kluth, S, Kolomensky, YG, Kral, JF, Le Clerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, 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, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, Mc Fall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, Mc Kenna, JA, Thiessen, D, Jolly, S, Mc Kemey, AK, Tinslay, J, Bukin, DA, Bukin, AD, Bukin, D, Buzykaev, AR, Golubev, VB, Ivanchenko, VN, Korol, AA, Kravchenko, EA, Onuchin, AP, Salnikov, AA, Serednyakov, SI, and Skovpen, YI

Subjects
High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment
Abstract

The B0and B+meson lifetimes have been measured in e+e- annihilation data collected in 1999 and 2000 with the BABAR detector at center-of-mass energies near the γ(4S) resonance. Events are selected in which one B meson is fully reconstructed in a hadronic final state while the second B meson is reconstructed inclusively. A combined fit to the B0and the B+decay time difference distributions yields τB0= 1.546 ± 0.032(stat) ± 0.022(syst) ps, τB+= 1.673 ± 0.032(stat) ± 0.023(syst) ps, and τB+/τB0= 1.082 ± 0.026(stat) ± 0.012(syst). © 2001 The American Physical Society.

Published
2001

27. Measurement of J/ψ production in continuum e+e- annihilations near √s = 10.6 GeV

Author

Aubert, B, Boutigny, D, Gaillard, JM, Hicheur, A, Karyotakis, Y, Lees, JP, Robbe, P, Tisserand, V, Palano, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Reinertsen, PL, Stugu, B, Abbott, B, Abrams, GS, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Clark, AR, Fan, Q, Gill, MS, Gritsan, A, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, J, Kerth, LT, Kluth, S, Kolomensky, YG, Kral, JF, Le Clerc, C, Levi, ME, Liu, T, Lynch, G, Meyer, AB, Momayezi, M, 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, Kirk, A, Knowles, DJ, Neale, SWO, Penny, RC, Watson, AT, Watson, NK, Deppermann, T, Goetzen, K, Koch, H, Krug, J, Kunze, M, Lewandowski, B, Peters, K, Schmuecker, H, Steinke, M, Andress, JC, Barlow, NR, Bhimji, W, Chevalier, N, Clark, PJ, Cottingham, WN, De Groot, N, Dyce, N, Foster, B, Mass, A, Mc Fall, JD, Wallom, D, Wilson, FF, Abe, K, Hearty, C, Mattison, TS, Mc Kenna, JA, Thiessen, D, Camanzi, B, Jolly, S, Mc Kemey, AK, Tinslay, J, Blinov, VE, Bukin, AD, Bukin, DA, Buzykaev, AR, Dubrovin, MS, Golubev, VB, Ivanchenko, VN, and Korol, AA

Subjects
High Energy Physics::Experiment
Abstract

The production of J/ψ mesons in continuum e+e- annihilations has been studied with the BABAR detector at energies near the Υ(4S) resonance. The mesons are distinguished from J/ψ production in B decays through their center-of-mass momentum and energy. We measure the cross section e+e- → J/ψX to be 2.52 ± 0.21 ± 0.21pb. We set a 90% C.L. upper limit on the branching fraction for direct Υ(4S) → J/ψX decays at 4.7 × 10-4. © 2001 The American Physical Society.

Published
2001

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