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Page : 8 pages
File Size : 21,21 MB
Release : 2005
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The authors have measured several branching ratios for?' decay using the data collected by FNAL E835 experiment during year 2000, obtaining?(?' 2!ee−) = 0.0068 ± 0.0001 ± 0.0004,?(?' 2!J/??+?−) = 0.292 ± 0.005 ± 0.018,?(?' 2!J/??°?°) = 0.167 ± 0.005 ± 0.014 and?(?' 2!J/??) = 0.028 ± 0.002 ± 0.002. They also present a measurement of the dipion mass distribution in the decays?' 2!J/???
Author :
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Page : 5 pages
File Size : 46,33 MB
Release : 2002
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We present a measurement of the branching fraction for the decay of the neutral B meson into the final state J/???−. The data set contains approximately 56 million B{bar B} pairs produced at the?(4S) resonance and recorded with the BABAR detector at the PEP-II asymmetric-energy e+e− storage ring. The result of this analysis is?(B ° → J/??+?−) = (4.6 ± 0.7 ± 0.6) x 10−5, where the first error is statistical and the second is systematic. In addition we measure?(B° → J???°) = (1.6 ± 0.6 ± 0.4) x 10−5.
Author :
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Page : pages
File Size : 37,15 MB
Release : 2004
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The authors measure the branching fractions of the [psi](2S) meson to the leptonic final states e[sup +]e[sup -] and [mu][sup +][mu][sup -] relative to that for [psi](2S) [yields] J/[psi] [pi][sup +][pi][sup -]. The method uses [psi](2S) mesons produced in the decay of B mesons at the [Upsilon](4S) resonance in a data sample collected with the BABAR detector at the Stanford Linear Accelerator Center. Using previous measurements for the [psi](2S) [yields] J/[psi] [pi][sup +][pi][sup -] branching fraction, they determine the e[sup +]e[sup -] and [mu][sup +][mu][sup -] branching fractions to be 0.0078 [+-] 0.0009 [+-] 0.0008 and 0.0067 [+-] 0.0008 [+-] 0.0007 respectively.
Author :
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Page : 1430 pages
File Size : 13,34 MB
Release : 1984
Category : Power resources
ISBN :
Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Author : Particle Data Group
Publisher :
Page : 278 pages
File Size : 13,34 MB
Release : 1978
Category : Baryons
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Author :
Publisher :
Page : 112 pages
File Size : 38,19 MB
Release : 1997
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Author : William Malcolm Lee
Publisher :
Page : 212 pages
File Size : 20,87 MB
Release : 1999
Category : Charmonium
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Author :
Publisher :
Page : 137 pages
File Size : 50,76 MB
Release : 1997
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Author : Duc Ong
Publisher :
Page : 130 pages
File Size : 15,48 MB
Release : 2007
Category : Branching fractions (Nuclear physics)
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Author : K. George
Publisher :
Page : pages
File Size : 18,78 MB
Release : 2006
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ISBN :
We present measurements of the branching fraction and time-dependent CP asymmetries in B{sup 0} {yields} J/{psi}{pi}{sup 0} decays based on (231.8 {+-} 2.6) x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. We obtain a branching fraction {Beta}(B{sup 0} {yields} J/{psi}{pi}{sup 0}) = (1.94 {+-} 0.22 (stat) {+-} 0.17 (syst)) x 10{sup -5}. We also measure the CP asymmetry parameters C = -0.21 {+-} 0.26 (stat) {+-} 0.06 (syst) and S = -0.68 {+-} 0.30 (stat) {+-} 0.04 (syst).
