Measurement Of B0 D S D Branching Fractions And Polarization In The Decay B0 Ds File With A Partial Reconstruction Technique
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Measurement Of B0 D S D Branching Fractions And Polarization In The Decay B0 Ds File With A Partial Reconstruction Technique
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Author :
language : en
Publisher:
Release Date : 2003
Measurement Of B0 D S D Branching Fractions And Polarization In The Decay B0 Ds File With A Partial Reconstruction Technique written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
We present measurements of the decays B[sup 0][yields] D[sub s][sup (*)+] D*[sup -], using data recorded by the BABAR detector in 1999 and 2000, consisting of 20.8 fb[sup -1]. The analysis is conducted with a partial reconstruction technique, in which only the D[sub s][sup (*)+] and the soft pion from the D*[sup -] decay are reconstructed. From the observed rates, we measure the branching fractions[Beta](B[sup 0][yields] D[sub s][sup+] D*[sup -])= (1.03[+-] 0.14[+-] 0.13[+-] 0.26)% and[Beta](B[sup 0][yields] D*[sub s][sup+] D*[sup -])= (1.97[+-] 0.15[+-] 0.30[+-] 0.49)%, where the first error is statistical, the second is systematic, and the third is the error due to the D[sub s][sup+][yields][phi][pi][sup+] branching fraction uncertainty. From the[Beta](B[sup 0][yields] D*[sub s][sup+] D*[sup -]) angular distributions, we measure the fraction of longitudinal polarization[Lambda][sub L]/[Lambda]= (51.9[+-] 5.0[+-] 2.8)%, which is consistent with the theoretical prediction, based on factorization. These results are preliminary.
Measurement Of B0 Ds D Branching Fractions And B0 Ds D Polarization With A Partial Reconstruction Technique
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Author :
language : en
Publisher:
Release Date : 2003
Measurement Of B0 Ds D Branching Fractions And B0 Ds D Polarization With A Partial Reconstruction Technique written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
The authors present a study of the decays B[sup 0][yields] D[sub s][sup (*)+] D*[sup -], using 20.8 fb[sup -1] of e[sup+]e[sup -] annihilation data recorded with the BABAR detector. The analysis is conducted with a partial reconstruction technique, in which only the D[sub s][sup (*)+] and the soft pion from the D*[sup -] decay are reconstructed. They measure the branching fractions[Beta](B[sup 0][yields] D[sub s][sup (*)+] D*[sup -])= (1.03[+-] 0.14[+-] 0.13[+-] 0.26)% and[Beta](B[sup 0][yields] D[sub s][sup (*)+] D*[sup -])= (1.97[+-] 0.15[+-] 0.30[+-] 0.49)%, where the first error is statistical, the second is systematic, and the third is the error due to the D[sub s][sup+][yields][phi][pi][sup+] branching fraction uncertainty. From the B[sup 0][yields] D[sub s][sup (*)+] D*[sup -] angular distributions, they measure the fraction of longitudinal polarization[Lambda][sub L]/[Lambda]= (51.9[+-] 5.0[+-] 2.8)%, which is consistent with theoretical predictions based on factorization.
Preventie Van Psychische Stoornissen
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language : en
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Release Date : 1994
Preventie Van Psychische Stoornissen written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Partial Reconstruction Of Bz To Dss Dstarm Decays And Measurement Of The Ds To Phi Pip Branching Fraction
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language : en
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Release Date : 2004
Partial Reconstruction Of Bz To Dss Dstarm Decays And Measurement Of The Ds To Phi Pip Branching Fraction written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Preliminary results are presented on the branching fractions B (B[sup 0] --> D[sub s][sup *+]D[sup *-]) and B (D[sub s][sup +] --> [phi][pi][sup +]), based on a data sample of approximately 124 x 10[sup 6] B[bar B] events collected by the BABAR detector at the PEP-II e[sup +]e[sup -] B-factory. B (B[sup 0] --> D[sub s][sup *+]D[sup *-]) is measured selecting neutral B meson decays to the final state D[sup *-]D[sub s][sup *+] with partial reconstruction of the D[sub s][sup *+], in which only the D[sup *-] and the soft photons from the decay D[sub s][sup *+] --> D[sub s][sup +][gamma] are reconstructed. The branching fraction product B (B[sup 0] --> D[sub s][sup *+]D[sup *-]) [center-dot] B(D[sub s][sup +] --> [phi][pi][sup +]) is measured via a complete reconstruction of the whole decay chain. Comparing these two measurements provides a model-independent determination of the B (D[sub s][sup +] --> [phi][pi][sup +]) branching fraction. The authors obtain the following preliminary results: B(B[sup 0] --> D[sub s][sup *+]D[sup *-]) = (1.85 [+-] 0.09 [+-] 0.16)%; B(D[sub s][sup +] --> [phi][pi][sup +]) = (4.71 [+-] 0.47 [+-] 0.35)% where the first error in each measurement is statistical, the second systematic.
Measurement Of The B0 D A 1 Branching Fraction With Partially Reconstructed D
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language : en
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Release Date : 2003
Measurement Of The B0 D A 1 Branching Fraction With Partially Reconstructed D written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
The B[sup 0][yields] D*[sup -] a[sub 1][sup+] branching fraction has been measured with data collected by the BaBar experiment in 1999 and 2000 corresponding to a total integrated luminosity of 20.6 fb[sup -1]. Signal events have been selected using a partial reconstruction technique, in which only the a[sub 1][sup+] and the slow pion ([pi][sub s]) from the D*[sup -] decay are identified. A signal yield of 18400[+-] 1200 events has been found, corresponding to a preliminary branching fraction of (1.20[+-] 0.07(stat)[+-] 0.14(syst))%.
Measurement Of The B0 To D D S And D S To Phi Pi Branching Fractions
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Author :
language : en
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Release Date : 2005
Measurement Of The B0 To D D S And D S To Phi Pi Branching Fractions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
The authors present measurements of the branching fractions?(B° → D*−D*{sub s}) and?(D{sub s}+ →??+), based on 123 x 106?(4S) → B{bar B} decays collected by the BABAR detector at the PEP-II asymmetric-energy e+e− B factory. A partial reconstruction technique is used to measure?(B° → D*−D*{sub s}+) and the decay chain is fully reconstructed to measure the branching fraction product?(B° → D*− D*{sub s}+) x?(D{sub s}+ →??+). Comparing these two measurements provides a model-independent determination of the D{sub s}+ →??+ branching fraction. They obtain?(B° → D*−D*{sub s}+) = (1.88 ± 0.09 ± 0.17)% and?(D{sub s}+ →??+) = (4.81 ± 0.52 ± 0.38)%, where the first uncertainties are statistical and the second systematic.
Measurement Of Beta B Sup 0 Yields D Sub S Sup D Sup And Determination Of The D Sub S Sup Yields Phi Pi Sup Branching Fraction With A Partial Reconstruction Method
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language : en
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Release Date : 2003
Measurement Of Beta B Sup 0 Yields D Sub S Sup D Sup And Determination Of The D Sub S Sup Yields Phi Pi Sup Branching Fraction With A Partial Reconstruction Method written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
The authors present model-independent measurements of the branching fractions[Beta](B[sup 0][yields] D*[sub s][sup+] D*[sup -]) and[Beta](D[sub s][sup+][yields][phi][pi][sup+]) based on 19.3 fb[sup -1] of data collected by the BABAR detector at the PEP-II e[sup+]e[sup -] B Factory. Neutral B-meson decays to the D*[sub s][sup+]D*[sup -] final state are selected with a partial reconstruction of the D*[sub s][sup+]; that is, only the D*[sup -] and the soft photon from the decay D*[sub s][sup+][yields] D[sub s][sup+][gamma] are reconstructed. The branching fraction[Beta](B[sup 0][yields] D*[sub s][sup+] D*[sup -]) is extracted from these event yields, while[Beta](D[sub s][sup+][yields][phi][pi][sup+]) is determined by combining this result with a previous measurement of the product[Beta](B[sup 0][yields] D*[sub s][sup+] D*[sup -]) x[Beta](D[sub s][sup+][yields][phi][pi][sup+]) with partial reconstruction of the D*[sup -]. They obtain the following preliminary results:[Beta](B[sup 0][yields] D*[sub s][sup+] D*[sup -])= (1.50[+-] 0.16[+-] 0.12)%, [Beta](D[sub s][sup+][yields][phi][pi][sup+])= (4.7[+-] 0.6[+-] 0.8)% where the first error is statistical, and the second systematic.
Measurement Of The Exclusive And Inclusive Branching Fractions Of B 0 S To D S D S Decays At Cdf And Its Implications On The Decay Width Difference In The B 0 S B 0 S Meson System
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language : en
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Release Date : 2011
Measurement Of The Exclusive And Inclusive Branching Fractions Of B 0 S To D S D S Decays At Cdf And Its Implications On The Decay Width Difference In The B 0 S B 0 S Meson System written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
The purpose of this thesis is threefold: Firstly, new measurements of both the exclusive and semi-inclusive partial decay widths of $B^{0}_{s} \to D^{(*)+}_{s}D^{(*)-}_{s}$ meson decays are presented. Secondly, the feasibility of extracting the unknown polarization components in $B^{0}_{s} \to D^{(*)+}_{s}D^{(*)-}_{s}$ by partial reconstruction of this pseudo-scalar to vector-vector decay in a Monte Carlo driven analysis scheme is studied. Finally, based on the suggestions contributed by the theory community this study discusses how a measurement of the branching fraction of semi-inclusive decays $B^{0}_{s} \to D^{(*)+}_{s}D^{(*)-}_{s}$ can contribute to gain insight about the relative decay width di erence in the B$0\atop{s}$--B$0\atop{s}$ meson system.
Measurement Of B D Sub S D And Determination Of The D Sub S Branching Fraction With A Partial Reconstruction Method
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Author :
language : en
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Release Date : 2003
Measurement Of B D Sub S D And Determination Of The D Sub S Branching Fraction With A Partial Reconstruction Method written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
The authors present model-independent measurements of the branching fractions?(B° → D*{sub s} D*−) and?(D{sub s}+ →??+) based on 19.3 fb−1 of data collected by the BABAR detector at the PEP-II e+e− B Factory. Neutral B-meson decays to the D*{sub s}+D*− final state are selected with a partial reconstruction of the D*{sub s}+; that is, only the D*− and the soft photon from the decay D*{sub s}+ → D{sub s}+? are reconstructed. The branching fraction?(B° → D*{sub s}+ D*−) is extracted from these event yields, while?(D{sub s}+ →??+) is determined by combining this result with a previous measurement of the product?(B° → D*{sub s}+ D*−) x?(D{sub s}+ →??+) with partial reconstruction of the D*−. They obtain the following preliminary results:?(B° → D*{sub s}+ D*−) = (1.50 ± 0.16 ± 0.12)%,?(D{sub s}+ →??+) = (4.7 ± 0.6 ± 0.8)% where the first error is statistical, and the second systematic.
Measurement Of The Branching Fraction And Polarization For The Decay B D 0k
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language : en
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Release Date : 2003
Measurement Of The Branching Fraction And Polarization For The Decay B D 0k written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.