Measurement Of The Branching Fraction Br B0s U2192 Ds Ds Using The D0 Detector At Fermilab

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Measurement Of The Branching Fraction Br B0s U2192 Ds Ds Using The D0 Detector At Fermilab

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Author :
language : en
Publisher:
Release Date : 2008

Measurement Of The Branching Fraction Br B0s U2192 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 2008 with categories.

This thesis describes a measurement of the branching fraction Br (B0s → Ds*Ds*) 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*s meson was partially reconstructed in the decay Ds → ??v, and the other D*s meson was identified using the decay Ds → ?? where no attempt was made to distinguish Ds and D*s states. The resulting measurement is Br (B0s → Ds*Ds*) = 0.039+0.019-0.017(stat) +0.016-0.015(syst). This was subsequently used to estimate the width difference ??CPs in the B0s-$ar{B}$0s system: ??CPs/?s = 0.079+0.038-0.035(stat)+0.031-0.030(syst), and is currently one of the most precise estimates of this quantity and consistent with the Standard Model.

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.

Measurement Of The Branching Fraction Br Bos Ds Using The Do Detector At Fermilab

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Author : James William Walder
language : en
Publisher:
Release Date : 2008

Measurement Of The Branching Fraction Br Bos Ds Using The Do Detector At Fermilab written by James William Walder and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.

Measurement Of The Ratio Of Branching Fractions B D0 K Pi

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Author :
language : en
Publisher:
Release Date : 2006

Measurement Of The Ratio Of Branching Fractions B D0 K Pi written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

The authors present a measurement of R{sub B}, the ratio of the branching fraction for the rare decay D° → K?− to that for the Cabibbo-favored decay D° → K−?+. Charge conjugate decays are implicitly included. A signal of 2005 ± 104 events for the decay D° → K+?− is obtained using the CDF II detector at the Fermilab Tevatron collider. The data set corresponds to an integrated luminosity of 0.35 fb−1 produced in {bar p}p collisions at √s = 1.96 TeV. Assuming no mixing, they find R{sub B} = [4.05 ± 0.21(stat) ± 0.11(syst)] x 10−3. This measurement is consistent with the world average, and comparable in accuracy with the best measurements from other experiments.

Measurement Of The Ratio Of Branching Fractions B 0 Atop S U2192 D Atop S D Atop S B B0 U2192 D D Atop S With The Cdf Detector

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Author :
language : en
Publisher:
Release Date : 2007

Measurement Of The Ratio Of Branching Fractions B 0 Atop S U2192 D Atop S D Atop S B B0 U2192 D D Atop S With The Cdf Detector written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.

In this thesis they report the measurement of ratios of branching fractions: ?(B$0top{s}$ → D$-top{s}$ ?+?+?-)/?(B0 → D-?+?+?-), and ?(B0 → D-D$+top{s}$)/?(B0 → D-?+?+?-), using 355 pb-1 of data collected by CDF detector at the Tevatron p$ar{p}$ collider at √s = 1.96 TeV.

Measurement Of The Branching Fraction Ratio Br B Bar D 0k U2192 K K Br B Bar D 0 K With The Cdf Ii Detector

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Author :
language : en
Publisher:
Release Date : 2006

Measurement Of The Branching Fraction Ratio Br B Bar D 0k U2192 K K Br B Bar D 0 K With The Cdf Ii Detector written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

In this thesis the author has described the first measurement performed at a hadron collider of the branching fraction of the Cabibbo-suppressed mode B+ → $ar{D}$0 K+. The analysis has been performed with 360 pb-1 of data collected by the CDF II detector.

Measurement Of The Bar B 0 U2192 D L Bar V Branching Fraction With A Partial Reconstruction Technique

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Author :
language : en
Publisher:
Release Date : 2009

Measurement Of The Bar B 0 U2192 D L Bar V Branching Fraction 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 2009 with categories.

Presented is a precise measurement of the $ar{B}$0 → D*+l-$ar{v}$l branching fraction using 81.47 fb-1 of data collected with the BABAR detector at the PEP-II e+e- storage ring at the Stanford Linear Accelerator Center. The measurement was performed by partially reconstructing the D*+ meson from $ar{B}$0 → D*+l-$ar{v}$l decays using only the soft pion of the D*+ → D0?+ decay to reconstruct its four vector. The branching fraction was measured to be ?($ar{B}$0 → D*+l-$ar{v}$l) = (4.91 ± 0.01stat ± 0.15syst)%.

Measurement Of The Ratios Of Branching Fractions B Bs Ds Pi Pi Pi

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Author :
language : en
Publisher:
Release Date : 2006

Measurement Of The Ratios Of Branching Fractions B Bs Ds Pi Pi Pi written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

Using 355 pb−1 of data collected by the CDF II detector in p{bar p} collisions at √s = 1.96 TeV at the Fermilab Tevatron, they study the fully reconstructed hadronic decays B{sub (s)}° → D{sub (s)}−? and B{sub (s)}° → D{sub (s)}−?+?+?−. They present the first measurement of the ratio of branching fractions?(B{sub s}° → D{sub s}−?+?+?−)/?(B° → D−?+?+?−) = 1.05 ± 0.10(stat.) ± 0.22(syst.). They also update their measurement of?(B{sub s}° → D{sub s}−?+)/?(B° → D−?+) to 1.13 ± 0.08(stat.) ± 0.23(syst.) improving the statistical uncertainty by more than a factor of two. They find?(B{sub s}° → D{sub s}−?+) = [3.8 ± 0.3(stat.) ± 1.3(syst.)] x 10−3 and?(B{sub s}° → D{sub s}−?+?+?−) = [8.4 ± 0.8(stat.) ± 3.2(syst.)] x 10−3.

Measurement Of The Ratio Of Branching Fractions Br B 0 Atop S U2192 D Atop S Br B0 U2192 D At Cdf Ii

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Author :
language : en
Publisher:
Release Date : 2004

Measurement Of The Ratio Of Branching Fractions Br B 0 Atop S U2192 D Atop S Br B0 U2192 D At Cdf Ii 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.

The measurement of B$0top{s}$ mixing is one of the flagship analyses for the Run II B physics program. The sensitivity of the measurement to the frequency of B$0top{s}$ oscillations strongly depends on the number of reconstructed B$0top{s}$ mesons. They present the measurement of the ratio of branching fractions Br(B$0top{s}$ → D$-top{s}$?+)/Br(B0 → D-?+), which directly influences the number of B$0top{s}$ events available for the measurement of B$0top{s}$ mixing at CDF-II. They analyze 115 pb-1 of data collected with the CDF-II detector in p$ar{p}$ collisions at √s = 1.96 TeV using a novel displaced track trigger. They reconstruct 78 ± 11 B$0top{s}$ → D$-top{s}$?+ decays at 1153 ± 45 B0 → D-?+ decays with good signal to background ratio. This is the world's largest sample of fully reconstructed B$0top{s}$ → D$-top{s}$?+ decays. They find the ratio of production fractions multiplied by the ratio of branching fractions to be: fs/fd • Br(B$0top{s}$ → D$-top{s}$?+)/Br(B0 → D-?+) = 0.325 ± 0.046(stat) ± 0.034(syst) ± 0.084 (BR). Using the world average value of fs/fd = 0.26 ± 0.03, we infer that the ratio of branching fractions is: Br(B$0top{s}$ → D$-top{s}$?+)/Br(B0 → D-?+) = 1.25 ± 0.18(stat) ± 0.13(syst) ± 0.32(BR) ± 0.14(PR) where the last uncertainty is due to the uncertainty on the world average measurement of the ratio of B$0top{s}$ to B0 production rates, fs/fd.

Measurement Of The Branching Fraction For B D0 K

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Author :
language : en
Publisher:
Release Date : 2003

Measurement Of The Branching Fraction For B D0 K 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 measurement of the branching fraction for the decay B− → D° K{sup *-} using a sample of approximately 86 million B{bar B} pairs collected by the BABAR detector from ee− collisions near the?(4S) resonance. The D° is detected through its decays to K−?+, K−?+?° and K−?+?−?+, and the K{sup *-} through its decay to K{sub S}°?−. They measure the branching fraction to be?(B− → D°K{sup *-}) = (6.3 ± 0.7(stat.)±0.5(syst.)) x 10−4.