Measurement Of The Ratio Of Branching Ratios B B To J Psi Pi

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Energy Research Abstracts

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High Energy Physics Index

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A Measurement Of The B0 J Psi Pi Pi Branching Fraction

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language : en
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Release Date : 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/[psi][pi][sup+][pi][sup -]. The data set contains approximately 56 million B[bar B] pairs produced at the[Upsilon](4S) resonance and recorded with the BABAR detector at the PEP-II asymmetric-energy e[sup+]e[sup -] storage ring. The result of this analysis is[Beta](B[sup 0][yields] J/[psi][pi][sup+][pi][sup -])= (4.6[+-] 0.7[+-] 0.6) x 10[sup -5], where the first error is statistical and the second is systematic. In addition we measure[Beta](B[sup 0][yields] J?[psi][rho][sup 0])= (1.6[+-] 0.6[+-] 0.4) x 10[sup -5].

Measurement Of The Branching Fractions For Psi 2s E E And Psi 2s Mu Mu

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language : en
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Release Date : 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.

A Measurement Of The Kl Pi Pi Branching Ratio

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Author : Angel Mario Lopez-Berrios
language : en
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Release Date : 1976

A Measurement Of The Kl Pi Pi Branching Ratio written by Angel Mario Lopez-Berrios and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Branching ratios (Nuclear physics) categories.