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

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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.

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.

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 Cp Asymmetries And Branching Fractions In Neutral B Meson Decays To Charged Pions And Kaons With The Babar Detector

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Author :
language : en
Publisher:
Release Date : 2005

Measurement Of Cp Asymmetries And Branching Fractions In Neutral B Meson Decays To Charged Pions And Kaons 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 2005 with categories.

Search For Cp Violation In B0 To D K0 Decays

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Author : Troels C. Petersen
language : en
Publisher:
Release Date : 2004

Search For Cp Violation In B0 To D K0 Decays written by Troels C. Petersen 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.

Following the idea of considering three-body decays with final state B to DKpi in the pursuit of the notoriously elusive unitary angle gamma, the initial steps towards its measurement are presented. Using a sample of approximately 88 million BBbar pairs collected with the BaBar detector at the PEP-II collider, a measurement of the branching fractions BO to D+- KO pi-+ and BO to D*+- KO pi-+ are presented for the entire Dalitz region: Br(BO to D+- KO pi-+) = (4.97 +- 0.69 +- 0.55) x 10^(-4) Br(BO to D*+- KO pi-+) = (3.00 +- 0.66 +- 0.29) x 10^(-4). In both decay modes the dominant resonance is the K*+-(892) between the neutral kaon and the charged pion. Measuring the branching fractions of the corresponding resonant two-body decays yields: Br(BO to D+- K*-+) = (4.78 +- 0.58 +- 0.53) x 10^(-4) Br(BO to D*+- K*-+) = (3.22 +- 0.59 +- 0.29) x 10^(-4). Performing a time-dependent CP asymmetries fit of the resonant decay mode BO to D+- K*-+ yields: C = 0.93 +- 0.18 +- 0.03 ABS[lambda] = 0.19 +- 0.25 +- 0.04 S = 0.18 +- 0.28 +- 0.02 Delta S = 0.08 +- 0.28 +- 0.02. As the amplitude ratio ABS[lambda] is consistant with zero, no interference sensitive to gamma can be established at this point.

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 Branching Fraction And Polarization For The Decay B Sup Yields D Sup 0 K Sup

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Author :
language : en
Publisher:
Release Date : 2003

Measurement Of The Branching Fraction And Polarization For The Decay B Sup Yields D Sup 0 K Sup 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 decay B[sup -][yields] D*[sup 0] K*[sup -] based on a sample of 86 million[Upsilon](4S)[yields] B[bar B] decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factor at SLAC. The authors measure the branching fraction[Beta](B[sup -][yields] D*[sup 0] K*[sup -])= (8.3[+-] 1.1(stat)[+-] 1.0(syst)) x 10[sup -4], and the fraction of longitudinal polarization in this decay to be[Lambda][sub L]/[Lambda]= 0.86[+-] 0.06(stat)[+-] 0.03(syst).

Measurements Of Cp Violating Asymmetries And Branching Fractions In The Decays Of B Mesons To Charged Pions And Kaons At The Babar Detector

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Author : Morris Nicholas Danielson
language : en
Publisher:
Release Date : 2005

Measurements Of Cp Violating Asymmetries And Branching Fractions In The Decays Of B Mesons To Charged Pions And Kaons At The Babar Detector written by Morris Nicholas Danielson 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.

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.