A Measurement Of The Lambda C Baryon Decays To Proton Kaon Pion Absolute Branching Fraction With The Babar Detector

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A Measurement Of The Lambda C Baryon Decays To Proton Kaon Pion Absolute Branching Fraction With The Babar Detector

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Author :
language : en
Publisher:
Release Date : 2004

A Measurement Of The Lambda C Baryon Decays To Proton Kaon Pion Absolute Branching Fraction With The Babar 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 2004 with categories.

A measurement of [Beta]([Lambda][sub c][sup +] [yields] pK[sup -] [pi][sup +]) is presented based on data collected with the BaBar detector at the Stanford Linear Accelerator Center. Branching fraction measurements represent a large portion of what is known about short-lived particles, the strong force that binds them, and the weak force that causes them to decay. While the majority of branching fraction measurements are done as ratios between two decay modes, it is the absolute measurements of a few particular decay modes that set the scale for these relative measurements. The [Lambda][sub c][sup +] particle is one of the four weakly decaying hadrons into which more than 90% of the known heavy quark hadrons will eventually decay. Thus, an absolute measurement of the branching fraction for [Lambda][sub c][sup +] [yields] pK[sup -][pi][sup +] is important for many studies of the heavy quark sector, from spectroscopy to B meson decays. The number of produced [Lambda][sub c][sup +]'s is inferred from the number of events reconstructed with an antiproton and an accompanying D meson. The final result of [Beta]([Lambda][sub c][sup +] [yields] pK[sup -] [pi][sup +]) = [6.12 [+-] 0.31(stat.) [+-] 0.42(syst.)]% represents more than a two-fold improvement in precision over the world average. The dominant source of systematic uncertainty is the irreducible background of [Xi][sub c] baryons.

A Measurement Of The Lambda C Baryon Decays To Proton Kaon Pion Absolute Branching Fraction With The Babar Detector

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Author : C. Roat
language : en
Publisher:
Release Date : 2003

A Measurement Of The Lambda C Baryon Decays To Proton Kaon Pion Absolute Branching Fraction With The Babar Detector written by C. Roat 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.

A measurement of {Beta}({Lambda}{sub c}{sup +} {yields} pK{sup -} {pi}{sup +}) is presented based on data collected with the BaBar detector at the Stanford Linear Accelerator Center. Branching fraction measurements represent a large portion of what is known about short-lived particles, the strong force that binds them, and the weak force that causes them to decay. While the majority of branching fraction measurements are done as ratios between two decay modes, it is the absolute measurements of a few particular decay modes that set the scale for these relative measurements. The {Lambda}{sub c}{sup +} particle is one of the four weakly decaying hadrons into which more than 90% of the known heavy quark hadrons will eventually decay. Thus, an absolute measurement of the branching fraction for {Lambda}{sub c}{sup +} {yields} pK{sup -}{pi}{sup +} is important for many studies of the heavy quark sector, from spectroscopy to B meson decays. The number of produced {Lambda}{sub c}{sup +}'s is inferred from the number of events reconstructed with an antiproton and an accompanying D meson. The final result of {Beta}({Lambda}{sub c}{sup +} {yields} pK{sup -} {pi}{sup +}) = [6.12 {+-} 0.31(stat.) {+-} 0.42(syst.)]% represents more than a two-fold improvement in precision over the world average. The dominant source of systematic uncertainty is the irreducible background of {Xi}{sub c} baryons.

A Measurement Of The Lambda Charm Decay To Proton Kaon Pion Absolute Branching Fraction With The Babar Detector

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Author : Christopher M. Roat
language : en
Publisher:
Release Date : 2003

A Measurement Of The Lambda Charm Decay To Proton Kaon Pion Absolute Branching Fraction With The Babar Detector written by Christopher M. Roat 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.

Search For Semileptonic Decays In The B Meson Into The Lambda Subscript C Baryon

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Author : Tomohiko Tanabe
language : en
Publisher:
Release Date : 2009

Search For Semileptonic Decays In The B Meson Into The Lambda Subscript C Baryon written by Tomohiko Tanabe 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.

Measurement Of Lambda C Branching Fractions Of Cabibbo Suppressed Decay Modes In The Babar Experiment

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Author : Muhammad Saleem
language : en
Publisher:
Release Date : 2006

Measurement Of Lambda C Branching Fractions Of Cabibbo Suppressed Decay Modes In The Babar Experiment written by Muhammad Saleem 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.

This dissertation reports on a study of the relative branching fraction measurement of the charmed baryon {Lambda}{sub c} decaying to the Cabibbo-suppressed modes.

Recueil Factice D Articles De Presse Concernant Henriette Berthias

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Author :
language : en
Publisher:
Release Date :

Recueil Factice D Articles De Presse Concernant Henriette Berthias written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.

Measurements Of Cal B Overline B 0 To Lambda C Overline P And Cal B B To Lambda C Overline P Pi And Studies Of Lambda C Pi Resonances

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Author :
language : en
Publisher:
Release Date : 2008

Measurements Of Cal B Overline B 0 To Lambda C Overline P And Cal B B To Lambda C Overline P Pi And Studies Of Lambda C Pi Resonances 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.

The authors present an investigation of the decays {bar B}° →?{sub c}{bar p} and B− →?{sub c}+{bar p}?− based on 383 x 106?(4S) → B{bar B} decays recorded with the BABAR detector. They measure the branching fractions of these decays; their ratio is?(B− →?{sub c}+{bar p}?−)/?({bar B}° →?{sub c}+{bar p}) = 15.4 ± 1.8 ± 0.3. The B− →?{sub c}+{bar p}?− process exhibits an enhancement at the?{sub c}+{bar p} threshold and is a laboratory for searches for excited charm baryon states. They observe the resonant decays B− →?{sub c}(2455)°{bar p} and B−?{sub c}(2800)°{bar p} but see no evidence for B− →?{sub c}(2520)°{bar p}. This is the first observation of the decay B− →?{sub c}(2800)°{bar p}; however, the mass of the observed excited?{sub c}° state is (2846 ± 8 ± 10) MeV/c2, which is somewhat inconsistent with previous measurements. Finally, they examine the angular distribution of the B− →?{sub c}(2455)°{bar p} decays and measure the spin of the?{sub c}(2455)° baryon to be 1/2, as predicted by the quark model.

Measurement Of The B0 Lambda Bar P Pi Branching Fraction Andstudy Of The Decay Dynamics

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Author : M. Bondioli
language : en
Publisher:
Release Date : 2006

Measurement Of The B0 Lambda Bar P Pi Branching Fraction Andstudy Of The Decay Dynamics written by M. Bondioli 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.

We present a measurement of the B{sup 0} {center_dot} {bar {Lambda}}p{pi}{sup -} branching fraction performed using the BABAR detector at the PEP-II asymmetric energy e{sup +}e{sup -} collider. Based on a 232 million B{bar B} pairs data sample we measure: {center_dot} (B{sup 0} {center_dot} {bar {Lambda}}p{pi}{sup -}) = [3.30 {center_dot} 0.53(stat.) {center_dot} 0.31 (syst.)] {center_dot} 10{sup -6}. A measurement of the differential spectrum as a function of the di-baryon invariant mass m({Lambda}p) is also presented; this shows a near-threshold enhancement similar to that observed in other baryonic B decays.

Measurement Of Lambda C Branching Fractions Of Cabibbo Suppressed Decay Modes In The Babar Experiment

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Author : Muhammad Saleem
language : en
Publisher:
Release Date : 2006

Measurement Of Lambda C Branching Fractions Of Cabibbo Suppressed Decay Modes In The Babar Experiment written by Muhammad Saleem 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.

This dissertation reports on a study of the relative branching fraction measurement of the charmed baryon {Lambda}{sub c} decaying to the Cabibbo-suppressed modes.

Evidence For B Semileptonic Decays Into The Lambda C Charm Baryon

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Author :
language : en
Publisher:
Release Date : 2008

Evidence For B Semileptonic Decays Into The Lambda C Charm Baryon 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.

We present the first evidence for B semileptonic decays into the charmed baryon [Lambda]{sub c} based on 420 fb−1 of data collected at the [Upsilon](4S) resonance with the BABAR detector at the PEP-II ee− storage rings. Events are tagged by fully reconstructing one of the B mesons in a hadronic decay mode. We measure the relative branching fraction [Beta]({bar B} 2![Lambda]{sub c}+ Xl−{bar {nu}}{sub {ell}})/[Beta]({bar B} 2![Lambda]{sub c}+/{bar {Lambda}}{sub c}−X) = (3.2 ± 0.9{sub stat.} ± 0.9{sub syst.})%. The significance of the signal including the systematic uncertainty is 4.9 standard deviations.