Measurement Of B0 Ds D Branching Fractions And B0 Ds D Polarization With A Partial Reconstruction Technique

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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.

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.

High Energy Physics Ichep 2000 Proceedings Of The 30th International Conference In 2 Volumes

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Author : Chong-sa Lim
language : en
Publisher: World Scientific
Release Date : 2001-04-30

High Energy Physics Ichep 2000 Proceedings Of The 30th International Conference In 2 Volumes written by Chong-sa Lim and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-04-30 with Science categories.

This book presents topics of major interest to the high energy physics community, as well as recent research results.

Preventie Van Psychische Stoornissen

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Author :
language : en
Publisher:
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.

Dissertation Abstracts International

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Author :
language : en
Publisher:
Release Date : 1990

Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Dissertations, Academic categories.

Partial Reconstruction Of Bz To Dss Dstarm Decays And Measurement Of The Ds To Phi Pip Branching Fraction

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Author :
language : en
Publisher:
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 To D D S And D S To Phi Pi Branching Fractions

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Author :
language : en
Publisher:
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 The B0 D A 1 Branching Fraction With Partially Reconstructed D

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Author :
language : en
Publisher:
Release Date : 2002

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 2002 with categories.

The B° 2!D*− a1 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−1. Signal events have been selected using a partial reconstruction technique, in which only the a1 and the slow pion ([pi]{sub s}) from the D*− 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 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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Author :
language : en
Publisher:
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 Branching Fraction Bs Ds Ds Using The D0 Detector At Fermilab

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Author :
language : en
Publisher:
Release Date : 2009

Measurement Of The Branching Fraction Bs Ds Ds Using The D0 Detector At Fermilab written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

This thesis describes a measurement of the branching fraction Br(B°{sub s} → D{sup (*)}{sub s} D{sup (*)}{sub s}) made using a data sample collected from proton-antiproton collisions at a centre-of-mass energy of 1.96 TeV, corresponding to approximately 1.3 fb−1 of integrated luminosity collected in 2002--2006 by the D0 detector at the Fermilab Tevatron Collider. One D{sup (*)}{sub s} meson was partially reconstructed in the decay D{sub s} → [phi][mu][nu], and the other D{sup (*)}{sub s} meson was identified using the decay D{sub s} → [phi][pi] where no attempt was made to distinguish D{sub s} and D{sup *}{sub s} states. The resulting measurement is Br(B°{sub s} → D{sup (*)}{sub s} D{sup (*)}{sub s}) = 0.039{sup +0.019}{sub -0.017}(stat){sup +0.016}{sub -0.015}(syst). This was subsequently used to estimate the width difference [Delta][Gamma]{sup CP}{sub s} in the B°{sub s}-{anti B}°{sub s} system: [Delta][Gamma]{sup CP}{sub s}/[Gamma]{sub s} = 0.079{sup +0.038}{sub -0.035}(stat){sup +0.031}{sub 0.030}(syst), and is currently one of the most precise estimates of this quantity and consistent with the Standard Model.