Measurement Of The Lambda Subscript B Lifetime In The Decay Mode Lambda Subscript B Right Arrow J Psi Lambda

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Measurement Of The Lambda Subscript B Lifetime In The Decay Mode Lambda Subscript B Right Arrow J Psi Lambda

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Author : Robyn Madrak
language : en
Publisher:
Release Date : 2003

Measurement Of The Lambda Subscript B Lifetime In The Decay Mode Lambda Subscript B Right Arrow J Psi Lambda written by Robyn Madrak and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Mesons categories.

Inis Atomindex

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Author :
language : en
Publisher:
Release Date : 1988

Inis Atomindex written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Nuclear energy categories.

Current Programs

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Author :
language : en
Publisher:
Release Date : 1977

Current Programs written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Engineering categories.

Measurement Of The Lambda 0 B Lifetime In The Exclusive Decay Lambda 0 B Rightarrow J Psi Lambda 0 With The D0 Detector

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Author :
language : en
Publisher:
Release Date : 2012

Measurement Of The Lambda 0 B Lifetime In The Exclusive Decay Lambda 0 B Rightarrow J Psi Lambda 0 With The D0 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 2012 with categories.

In this work we report a measurement of the [Lambda]0b baryon lifetime using the exclusive decay [Lambda]0b→ J/ [Psi][Lambda]0. The B0 meson lifetime is also measured in the topologically similar channel B0→ J/ K0S , which provides a crosscheck of the measurement procedure, and allows a direct determination of the ratio of the [Lambda]0b and the B0 lifetimes. The data used in this analysis were collected with the DØ detector during the complete Run II of the Fermilab Tevatron Collider, from 2002 to 2011, and correspond to an integrated luminosity of 10.4 fb-1 of proton-antiproton collisions at a center of mass energy √s = 1.96 TeV. We obtain [tau] ([Lambda]0b ) = 1.303 ± 0.075 (stat.) ± 0.035 (syst.) ps, [tau] (B0) = 1.508±0.025 (stat.)±0.043 (syst.) ps and [tau] ([Lambda]0b )/[tau] (B0) = 0.864± 0.052 (stat.)±0.033 (syst.). These measurements supersede previous results of the DØ Collaboration using the same decay channels. Our measurement of the lifetime ratio is in excellent agreement with theoretical predictions and compatible with the current world-average, but differs with the latest measurement of the CDF Collaboration in more than 2 standard deviations.

Measurement Of The Lambda B Lifetime In The Exclusive Decay Lambda B J

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Author :
language : en
Publisher:
Release Date : 2007

Measurement Of The Lambda B Lifetime In The Exclusive Decay Lambda B J 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.

We have measured the?{sub b} lifetime using the exclusive decay?{sub b}→J/??, based on 1.2 fb−1 of data collected with the D0 detector during 2002-2006. From 171 reconstructed?{sub b} decays, where the J/? and? are identified via the decays J/??????????− and????????p?, we measured the?{sub b} lifetime to be?(?{sub b})=1.218{sub -0.115}{sup +0.130}(stat)±0.042(syst) ps. We also measured the B° lifetime in the decay B°→J/?(?+?−)K{sub S}°(?+?−) to be?(B°)=1.501{sub -0.074}{sup +0.078}(stat)±0.050(syst) ps, yielding a lifetime ratio of?(?{sub b})/?(B°)=0.811{sub -0.087}{sup +0.096}(stat)±0.034(syst =).

Measurement Of Lifetime And Decay Width Difference In B0s J Psi Phi Decays

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Author :
language : en
Publisher:
Release Date : 2007

Measurement Of Lifetime And Decay Width Difference In B0s J Psi Phi Decays 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.

The authors measure the mean lifetime, [tau] = 2/([Lambda]{sub L} + [Lambda]{sub H}), and the decay-width difference, [Delta][Lambda] = [Lambda]{sub L} - [Lambda]{sub H}, of the light and heavy mass eigenstates of the B{sub s}° meson, B{sub sL}° and B{sub sH}°, in B{sub s}° → J/[psi][phi] decays using 1.7 fb−1 of data collected with the CDF II detector at the Fermilab Tevatron p{bar p} collider. Assuming CP conservation, a good approximation for the B{sub s}° system in the standard model, they obtain [Delta][Lambda] = 0.076{sub -0.063}{sup +0.059}(stat.) ± 0.006(syst.) ps−1 and [tau] = 1.52 ± 0.04(stat.) ± 0.02(syst.) ps, the most precise measurements to date. The constraints on the weak phase and [Delta][Lambda] are consistent with CP conservation.

Measurement Of The Lambda B Baryon Lifetime In Z Decays

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Author : Owen J. Hayes
language : en
Publisher:
Release Date : 1999

Measurement Of The Lambda B Baryon Lifetime In Z Decays written by Owen J. Hayes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.

B Lifetimes And X Y Z States At The Tevatron

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Author :
language : en
Publisher:
Release Date : 2011

B Lifetimes And X Y Z States At The Tevatron 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.

A measurement of b-hadron lifetimes in the fully reconstructed decay modes B 2!J/[psi]K+, B° 2!J/[psi]K*°, B° 2!J/[psi]K{sub S}°, and [Lambda]{sub b}° 2!J/[psi] [Lambda]° is reported using data corresponding to an integrated luminosity of 4.3 fb−1, collected by the CDF II detector at the Fermilab Tevatron. The measured values are [tau](B+) = 1.639 ± 0.009(stat) ± 0.009(syst) ps, [tau](B°) = 1.507 ± 0.010(stat) ± 0.008(syst) ps and [tau]([Lambda]{sub b}°) = 1.537 ± 0.045(stat) ± 0.014(syst) ps. The lifetime ratios are [tau](B+)/[tau](B°) - 1.088 ± 0.009(stat) ± 0.004(syst) and [tau]([Lambda]{sub b}°)/[tau](B°) = 1.020 ± 0.030(stat) ± 0.008(syst). These are the most precise measurements of these quantities from a single experiment. Observation is also reported for a structure near the J/[psi][phi] threshold, in B+ to J/[psi][phi]K+ decays with an integrated luminosity of 6.0 fb−1 and a statistical significance of 5 standard deviations. There are 19 ± 6 events observed for this structure at a mass of 4143.4{sub -3.0}{sup +2.9} ± 0.6 MeV/c2 and a width of 15.3{sub -6.1}{sup +10.4} ± 2.5 MeV/c2.

B 0 S And Lambda 0 B Lifetimes And Branching Ratios At The Tevatron

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Author : S. Behari
language : en
Publisher:
Release Date : 2006

B 0 S And Lambda 0 B Lifetimes And Branching Ratios At The Tevatron written by S. Behari 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 review B{sub s}{sup 0} and {Lambda}{sub b}{sup 0} lifetime and branching ratio measurements from the CDF and D0 experiments at the Tevatron Run II. Using up to 1 fb{sup -1} data samples per experiment, {Lambda}{sub b}{sup 0} lifetime in J/{Psi}{Lambda}{sup 0} decays, B{sub s}{sup 0} lifetime difference in K{sup +}K{sup -} and D{sub s}{sup (*)+} D{sub s}{sup (*)-} decays and B{sub s}{sup 0} branching ratio in D{sub s1}{sup -}(2536){mu}{sup +} {nu}X decays are reported.

Measurement Of The Lambda B 0 Lifetime Using Semileptonic Decays

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Author :
language : en
Publisher:
Release Date : 2007

Measurement Of The Lambda B 0 Lifetime Using Semileptonic Decays 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.