Study Of The Decay B0bar Lambdac Pbar Pi Pi And Its Intermediate States

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Study Of The Decay B0bar Lambdac Pbar Pi Pi And Its Intermediate States

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Author :
language : en
Publisher:
Release Date : 2013

Study Of The Decay B0bar Lambdac Pbar Pi Pi And Its Intermediate States written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.

Study Of The Decay B 0 Lambda C Pp P And Its Intermediate States

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Author : Thomas Hartmann
language : en
Publisher:
Release Date : 2011

Study Of The Decay B 0 Lambda C Pp P And Its Intermediate States written by Thomas Hartmann 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.

Observation Of The Baryonic B Decay B0bar Lambdac Antiproton K Pi

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Author :
language : en
Publisher:
Release Date : 2009

Observation Of The Baryonic B Decay B0bar Lambdac Antiproton 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 2009 with categories.

The authors report the observation of the baryonic B-decay {bar B}° → ?{sub c}+{bar p}K−?+, excluding contributions from the decay {bar B}° → ?{sub c}+{bar ?}K−. Using a data sample of 467 million B{bar B} pairs collected with the BABAR detector at the PEP-II storage ring at SLAC, the measured branching fraction is (4.33 ± 0.82){sub stat} ± 0.33{sub syst} ± 1.13{sub ?{sub c}+} x 10−5. In addition they find evidence for the resonant decay {bar B}° → ?{sub c}(2455){sup ++}{bar p}K− and determine its branching fraction to be (1.11 ± 0.30{sub stat} ± 0.09{sub syst} ± 0.29{sub ?{sub c}+}) x 10−5. The errors are statistical, systematic, and due to the uncertainty in the ?{sub c}+ branching fraction. For the resonant decay {bar B}° → ?{sub c}+{bar p}{bar K}*° we obtain an upper limit of 2.42 x 10−5 at 90% confidence level.

Study Of The Decay B0bar D Omega Pi

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Author : B. Aubert
language : en
Publisher:
Release Date : 2006

Study Of The Decay B0bar D Omega Pi written by B. Aubert 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 report on a study of the decay {bar B}{sup 0} {yields} D*{sup +}{omega}{pi}{sup -} with the BABAR detector at the PEP-II B-factory at the Stanford Linear Accelerator Center. Based on a sample of 232 million B{bar B} decays, we measure the branching fraction {Beta}({bar B}{sup 0} {yields} D*{sup +}{omega}{pi}{sup -}) = (2.88 {+-} 0.21(stat.) {+-} 0.31(syst.)) x 10{sup -3}. We study the invariant mass spectrum of the {omega}{pi}{sup -} system in this decay. This spectrum is in good agreement with expectations based on factorization and the measured spectrum in {tau}{sup -} {yields} {omega}{pi}{sup -} {nu}{sub {tau}}. We also measure the polarization of the D*{sup +} as a function of the {omega}{pi}{sup -} mass. In the mass region 1.1 to 1.9 GeV we measure the fraction of longitudinal polarization of the D*{sup +} to be {Lambda}{sub L}/{Lambda} = 0.654 {+-} 0.042(stat.) {+-} 0.016(syst.). This is in agreement with the expectations from heavy-quark effective theory and factorization assuming that the decay proceeds as {bar B}{sup 0} {yields} D*{sup +}{rho}(1450), {rho}(1450) {yields} {omega}{pi}{sup -}.

Observation And Study Of Baryonic B Decays

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Author :
language : en
Publisher:
Release Date : 2009

Observation And Study Of Baryonic B 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 2009 with categories.

We present a study of ten B-meson decays to a D{sup (*)}, a proton-antiproton pair, and a system of up to two pions using BABAR's data set of 455 x 106 B{bar B} pairs. Four of the modes {bar B}° → D°p{bar p}, {bar B}° → D*°p{bar p}, {bar B}° → Dp{bar p}?−, {bar B}° → D{sup ast+}p{bar p}?− are studied with improved statistics compared to previous measurements; six of the modes (B− → D°p{bar p}?−, B− → D*°p{bar p}?−, {bar B}° → D°p{bar p}?−?+, {bar B}° → D*°p{bar p}?−?+, B− → D+p{bar p}?−?−, B− → D{sup ast+}p{bar p}?−?−) are first observations. The branching fractions for 3- and 5-body decays are suppressed compared to 4-body decays. Kinematic distributions for 3-body decays show non-overlapping threshold enhancements in m(p{bar p}) and m(D{sup (*)0}p) in the Dalitz plots. For 4-body decays, m(p?−) mass projections show a narrow peak with mass and full width of (1497.4 ± 3.0 ± 0.9)MeV/c2 and (47 ± 12 ± 4)MeV/c2, respectively, where the first (second) errors are statistical (systematic). For 5-body decays, mass projections are similar to phase space expectations. All results are preliminary.

Observation Of The Decay B0bar Lambdac Antiproton Pi0

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Author :
language : en
Publisher:
Release Date : 2010

Observation Of The Decay B0bar Lambdac Antiproton Pi0 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.

In a sample of 467 million B{bar B} pairs collected with the BABAR detector at the PEP-II collider at SLAC we have observed the decay {bar B}° →?{sub c}{bar p}?° and measured the branching fraction to be (1.94 ± 0.17 ± 0.14 ± 0.50) x 10−4, where the uncertainties are statistical, systematic, and the uncertainty on the?{sub c}+ → pK−?+ branching fraction, respectively. We determine an upper limit of 1.5 x 10−6 at 90% C.L. for the product branching fraction?({bar B}° →?{sub c}+(2455){bar p}) x?(?{sub c}+ → pK−?+). Furthermore, we observe an enhancement at the threshold of the invariant mass of the baryon-antibaryon pair.

Study Of The D0 To Pi Pi Pi0 Decay At Babar

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Author :
language : en
Publisher:
Release Date : 2012

Study Of The D0 To Pi Pi Pi0 Decay At Babar 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.

The Dalitz-plot of the decay D° →??−?° measured by the BABAR collaboration shows the structure of a final state having quantum numbers I{sup G}J{sup PC} = 0−02−. An isospin analysis of this Dalitz-plot finds that the fraction of the I = 0 contribution is about 96%. This high I = 0 contribution is unexpected because the weak interaction violates the isospin.

Dalitz Plot Analysis Of The Decay B0 B0bar To K Pi Pi0

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Author :
language : en
Publisher:
Release Date : 2008

Dalitz Plot Analysis Of The Decay B0 B0bar To K Pi Pi0 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 report a Dalitz-plot analysis of the charmless hadronic decays of neutral B mesons to K{sup ±}?{sup {-+}}?°. With a sample of (231.8 ± 2.6) x 106?(4S) → B{bar B} decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, they measure the magnitudes and phases of the intermediate resonant and nonresonant amplitudes for B° and {bar B}° decays and determine the corresponding CP-averaged branching fractions and charge asymmetries. The inclusive branching fraction and CP-violating charge asymmetry are measured to be?(B° → K?−?°) = (35.7{sub -1.5}{sup +2.6} ± 2.2) x 10−6, and?{sub CP} = -0.030{sub -0.051}{sup +0.045} ± 0.055 where the first errors are statistical and the second systematic. They observe the decay B° → K*°(892)?° with the branching fraction?(B° → K*°(892)?°) = (3.6{sub -0.8}{sup +0.7} ± 0.4) x 10−6. This measurement differs from zero by 5.6 standard deviations (including the systematic uncertainties). The selected sample also contains B° → {bar D}°?° decays where {bar D}° → K+?−, and they measure?(B° → {bar D}°?°) = (2.93 ± 0.17 {+-} 0.18) x 10−4.

Isospin Analysis And Study Of The Decay Modes B 0 Lambda C P Pi 0 And B 0 Lambda C P Eta

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Author : Marcus Ebert
language : en
Publisher:
Release Date : 2011

Isospin Analysis And Study Of The Decay Modes B 0 Lambda C P Pi 0 And B 0 Lambda C P Eta written by Marcus Ebert 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.