Branching Fraction Measurement Of B0 To D Pi And B To D 0pi And Isospin Analyses Of B To D Pi Decays

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Branching Fraction Measurement Of B0 To D Pi And B To D 0pi And Isospin Analyses Of B To D Pi Decays

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

Branching Fraction Measurement Of B0 To D Pi And B To D 0pi And Isospin Analyses Of B To D Pi Decays 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.

Using 65 million {Upsilon}(4S) {yields} B{bar B} events collected with the BABAR detector at the PEP-II e{sup +}e{sup -} storage ring at the Stanford Linear Accelerator Center, they measure the color-favored branching fractions {Beta}({bar B}{sup 0} {yields} D{sup +}{pi}{sup -}) = (2.63 {+-} 0.05 {+-} 0.22) x 10{sup -3}, {Beta}({bar B}{sup 0} {yields} D*{sup +}{pi}{sup -}) = (2.79 {+-} 0.08 {+-} 0.18) x 10{sup -3}, {Beta}(B{sup -} {yields} D{sup 0}{pi}{sup -}) = (4.90 {+-} 0.07 {+-} 0.23) x 10{sup -3} and {Beta}(B{sup -} {yields} D*{sup 0} {pi}{sup -}) = (5.52 {+-} 0.17 {+-} 0.43) x 10{sup -3}, where the first error is statistical and the second is systematic. With these results and the current world average for the branching fraction for the color-suppressed decay {bar B}{sup 0} {yields} D{sup (*)0}{pi}{sup 0}, the cosines of the strong phase difference {delta} between the I = 1/2 and I = 3/2 isospin amplitudes are determined to be cos{sigma} = 0.860{sub -0.006-0.028}{sup +0.007+0.029} for the {bar B} {yields} D{pi} process and cos{sigma} = 0.917{sub -0.016-0.051}{sup +0.018+0.059} for the {bar B} {yields} D*{pi} process. The results for cos{delta} suggest that final-state interactions are presented in the D{pi} system.

Branching Fractions And Cp Asymmetries In B0 To Pi0pi0 B To Pi Pi0 And B To K Pi0 Decays And Isospin Analysis Of The B To Pi Pi System

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Author :
language : en
Publisher:
Release Date : 2004

Branching Fractions And Cp Asymmetries In B0 To Pi0pi0 B To Pi Pi0 And B To K Pi0 Decays And Isospin Analysis Of The B To Pi Pi System 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.

Based on a sample of 227 million B{bar B} pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we measure the branching fraction?(B° →?°?°) = (1.17 ± 0.32 ± 0.10) x 10−6, and the asymmetry C{sub?°?°} = -0.12 ± 0.56 ± 0.06. The B° →?°?° signal has a significance of 5.0?. We also measure?(B →?+?°) = (5.8 ± 0.6 ± 0.4) x 10−6,?(B+ → K+?°) = (12.0 ± 0.7 ± 0.6) x 10−6, and the charge asymmetries?{sub?+{pi}°} = -0.01 ± 0.10 ± 0.02 and?{sub K{sup +}{pi}°} = 0.06 ± 0.06 ± 0.01. Using isospin relations we find an upper bound on the angle difference.

Measurement Of Branching Fraction And Dalitz Distribution For B0 To D K0 Pi Decays

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Author :
language : en
Publisher:
Release Date : 2005

Measurement Of Branching Fraction And Dalitz Distribution For B0 To D K0 Pi 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 2005 with categories.

The authors present measurements of the branching fractions for the three-body decays B° → D{sup (*){-+}} K°[pi]{sup {+-}} and their resonant submodes B° → D{sup (*){-+}} K*{sup {+-}} using a sample of approximately 88 million B{bar B} pairs collected by the BABAR detector at the PEP-II asymmetric energy storage ring.

Measurement Of The Absolute Branching Fractionsb To D Pi D Pi D Pi With Amissing Mass Method

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Author : J. C. Chen
language : en
Publisher:
Release Date : 2006

Measurement Of The Absolute Branching Fractionsb To D Pi D Pi D Pi With Amissing Mass Method written by J. C. Chen 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 branching fraction measurements of charged and neutral B decays to D{pi}{sup -}, D*{pi}{sup -} and D**{pi}{sup -} with a missing mass method, based on a sample of 231 million {Upsilon}(4S) {yields} B{bar B} pairs collected by the BABAR detector at the PEP-II e{sup +}e{sup -} collider. One of the B mesons is fully reconstructed and the other one decays to a reconstructed charged {pi} and a companion charmed meson identified by its recoil mass, inferred by kinematics. Here D** refers to the sum of all the non-strange charm meson states with masses in the range 2.2-2.8 GeV/c{sup 2}.

Improved Measurements Of Neutral B Decay Branching Fractions To K0s Pi Pi And The Charge Asymmetry Of B0 K Pi

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Author : J. C. Chen
language : en
Publisher:
Release Date : 2005

Improved Measurements Of Neutral B Decay Branching Fractions To K0s Pi Pi And The Charge Asymmetry Of B0 K Pi written by J. C. Chen 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.

The authors analyze the decay B{sup 0} {yields} K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} using a sample of 232 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. A maximum likelihood fit finds the following branching fractions: {Beta}(B{sup 0} {yields} K{sup 0}{pi}{sup +}{pi}{sup -}) = (43.0 {+-} 2.3 {+-} 2.3) x 10{sup -6}, {Beta}(B{sup 0} {yields} f{sub 0}({yields} {pi}{sup +}{pi}{sup -})K{sup 0}) = (5.5 {+-} 0.7 {+-} 0.5 {+-} 0.3) x 10{sup -6} and {Beta}(B{sup 0} {yields} K*{sup +}{pi}{sup -}) = (11.0 {+-} 1.5 {+-} 0.5 {+-} 0.5) x 10{sup -6}. For these results, the first uncertainty is statistical, the second is systematic, and the third (if present) is due to the effect of interference from other resonances. They also measure the CP-violating charge asymmetry in the decay B{sup 0} {yields} K*{sup +}{pi}{sup -}, {Alpha}{sub K*{pi}} = -0.11 {+-} 0.14 {+-} 0.05.

Measurement Of The Branching Fractions For The Decays B Sup 0 D Sup P Bar P Pi Sup B Sup 0 D Sup P Bar P Pi Sup B0 D Sup 0 P Bar P And B Sup 0 D Sup 0 P Bar P

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Author :
language : en
Publisher:
Release Date : 2004

Measurement Of The Branching Fractions For The Decays B Sup 0 D Sup P Bar P Pi Sup B Sup 0 D Sup P Bar P Pi Sup B0 D Sup 0 P Bar P And B Sup 0 D Sup 0 P Bar P 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 B[sup 0] meson decay modes B[sup 0] --> D*[sup -]p[bar p][pi][sup +], D[sup -]p[bar p][sup +], [bar D]*[sup 0]p[bar p], and B[sup 0] --> [bar D][sup 0]p[bar p] are studied in a sample of 124 x 10[sup 6] B[bar B] pairs collected with the BABAR detector at the PEP-II collider. The decay of B[sup 0] --> D[sup -]p[bar p][pi][sup +] is observed for the first time, with a measured branching fraction B(B[sup 0] --> D[sup -]p[bar p][pi][sup +]) = (3.80 [+-] 0.35 [+-] 0.46) x 10[sup -4]. The following branching fractions are also determined: B(B[sup 0] --> D*[sup -]p[bar p][pi][sup +]) = (5.61 [+-] 0.59 [+-] 0.73) x 10[sup -4], B(B[sup 0] --> [bar D]*[sup 0] p[bar p]) = (0.67 [+-] 0.21 [+-] 0.09) x 10[sup -4], and B(B[sup 0] --> [bar D][sup 0]p[bar p]) = (1.24 [+-] 0.14 [+-] 0.12) x 10[sup -4]. In each decay mode the invariant mass spectra of the charmed mesons and the baryons are compared with a pure phase-space hypothesis in order to gain insight into the B meson decay dynamics. In particular, the Dalitz plots of [bar D]*[sup 0]p versus [bar D]*[sup 0][bar p] for B[sup 0] --> [bar D]*[sup 0]p[bar p] and of [bar D][sup 0]p versus [bar D][sup 0][bar p] for B[sup 0] --> [bar D][sup 0]p[bar p] are presented. All results are preliminary.

Measurement Of Branching Fractions And Resonance Contributions For B0 D0bar K Pi And Search For B0 D0 K Pi Decays

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Author :
language : en
Publisher:
Release Date : 2005

Measurement Of Branching Fractions And Resonance Contributions For B0 D0bar K Pi And Search For B0 D0 K Pi 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 2005 with categories.

Using 226 million?(4S) → B{bar B} events collected with the BABAR detector at the PEp-II ee− storage ring at the Stanford Linear Accelerator Center, they measure the branching fraction for B° → {bar D}°K+?−, excluding B° → D*−K+, to be?(B° → {bar D}°K+?−) = 88 ± 15 ± 9 x 10−6. They observe B° → {bar D}°K*(892)° and B° → D*2(2460)−K+ contributions. The ratio of branching fractions?(B° → D*− K+)/?(B° → D*−?+) = (7.76 ± 0.34 ± 0.29)% is measured separately. The branching fraction for the suppressed mode B° → D°K+?− is?(B° → D°K+?−)

Measurement Of The Ratios Of The Branching Fractions Beta B0 Sigma D Sigma Pi Pi Pi Beta B0 D Pi Pi Pi And Beta B0 Sigma D Sigma Pi Beta B0 D Pi Pi Pi With The Cdf Detector

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Author : Arkadiy Bolshov
language : en
Publisher:
Release Date : 2007

Measurement Of The Ratios Of The Branching Fractions Beta B0 Sigma D Sigma Pi Pi Pi Beta B0 D Pi Pi Pi And Beta B0 Sigma D Sigma Pi Beta B0 D Pi Pi Pi With The Cdf Detector written by Arkadiy Bolshov 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 present the measurement of the ratios of branching fractions B... to B..., and B... to B... We analyze data taken with the CDF II detector that corresponds to an integrated luminosity of 355 pb - 1 in pp collisions at ... TeV at the Fermilab Tevatron. Using a novel displaced track trigger we reconstruct 494 ± 28 B... decays, 8098 ± 114 B... decays, 159 ± 17 B... decays, and 3288 ± 76 B... decays. Using the world average value of the ... production ratio fs/fd = 0.259 ± 0.038, we determine the ratios of branching fractions ... where the uncertainties labeled BR and PR refer to the uncertainty on the D meson branching fractions and the production ratio fs/fd, respectively.

Measurement Of The Branching Fraction Of B0 Meson Decay To A 1 1260 Pi

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Author : J. C. Chen
language : en
Publisher:
Release Date : 2005

Measurement Of The Branching Fraction Of B0 Meson Decay To A 1 1260 Pi written by J. C. Chen 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.

We present a preliminary measurement of the branching fraction of the B meson decay B{sup 0} {yields} a{sub 1}{sup +}(1260){pi}{sup -}with a{sub 1}{sup +}(1260) {yields} {pi}{sup +}{pi}{sup +}{pi}{sup -}. The data sample corresponds to 218 x 10{sup 6} B{bar B} pairs produced in e{sup +}e{sup -} annihilation through the {Upsilon}(4S) resonance. We find the branching fraction (40.2 {+-} 3.9 {+-} 3.9) x 10{sup -6}, where the first error quoted is statistical and the second is systematic. The fitted values of the a{sub 1}(1260) parameters are m{sub a{sub 1}} = 1.22 {+-} 0.02 GeV/c{sup 2} and {Lambda}{sub a{sub 1}} = 0.423 {+-} 0.050 GeV/c{sup 2}.

Measurements Of B To Pi Eta Eta L Nu Branching Fractions Anddetermination Of

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Author :
language : en
Publisher:
Release Date : 2008

Measurements Of B To Pi Eta Eta L Nu Branching Fractions Anddetermination Of 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.