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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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 Cp Asymmetries And Branching Fractions In B0 Pi Pi B0 K Pi B0 Pi0 Pi0 B0 K0 Pi0 And Isospin Analysis Of B Pi Pi Decays
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Author :
language : en
Publisher:
Release Date : 2008
Measurement Of Cp Asymmetries And Branching Fractions In B0 Pi Pi B0 K Pi B0 Pi0 Pi0 B0 K0 Pi0 And Isospin Analysis Of B Pi 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 2008 with categories.
The authors present preliminary results of improved measurements of the CP-violating asymmetries and branching fractions in the decays B° →??−, B° → K+?−, B° →?°?°, and B° → K°?°. This update includes all data taken at the?(4S) resonance by the BABAR experiment at the asymmetric PEP-II B-meson factory at SLAC, corresponding to 467 ± 5 million B{bar B} pairs. They find S{sub??} = -0.68 ± 0.10 ± 0.03, C{sub??} = -0.25 ± 0.08 ± 0.02,?{sub K{sub?}} = -0.107 ± 0.016{sub -0.004}, {sup +0.006}, C{sub?°?°} = -0.43 ± 0.26 ± 0.05,?(B° →?°?°) = (1.83 ± 0.21 ± 0.13) x 10−6,?(B° → K°?°) = (10.1 ± 0.6 ± 0.4) x 10−6, where the first error is statistical and the second is systematic. They observe CP violation with a significance of 6.7? in B° → {pi}− and 6.1? in B° → K+{pi}−. Constraints on the Unitarity Triangle angle? are determined from the isospin relation between all B → {pi}{pi} rates and asymmetries.
Measurements Of The Branching Fraction And Time Dependent Cp Asymmetries Of B0 To J Psi Pi0 Decays
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Author : K. George
language : en
Publisher:
Release Date : 2006
Measurements Of The Branching Fraction And Time Dependent Cp Asymmetries Of B0 To J Psi Pi0 Decays written by K. George 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 measurements of the branching fraction and time-dependent CP asymmetries in B{sup 0} {yields} J/{psi}{pi}{sup 0} decays based on (231.8 {+-} 2.6) x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. We obtain a branching fraction {Beta}(B{sup 0} {yields} J/{psi}{pi}{sup 0}) = (1.94 {+-} 0.22 (stat) {+-} 0.17 (syst)) x 10{sup -5}. We also measure the CP asymmetry parameters C = -0.21 {+-} 0.26 (stat) {+-} 0.06 (syst) and S = -0.68 {+-} 0.30 (stat) {+-} 0.04 (syst).
Measurements Of The Branching Fraction And Time Dependent Cp Asymmetries Of B0 To J Psi Pi0 Decays
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Author : B. Aubert
language : en
Publisher:
Release Date : 2005
Measurements Of The Branching Fraction And Time Dependent Cp Asymmetries Of B0 To J Psi Pi0 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 2005 with categories.
The authors present measurements of the branching fraction and time-dependent CP asymmetries in B{sup 0} {yields} J/{psi} {pi}{sup 0} decays based on (231.8 {+-} 2.6) x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC during the years 1999-2004. We obtain a branching fraction {Beta}(B{sup 0} {yields} J/{psi}{pi}{sup 0}) = (1.94 {+-} 0.22 (stat) {+-} 0.17 (syst)) x 10{sup -5}. They also measure the CP asymmetry parameters C = -0.21 {+-} 0.26 (stat) {+-} 0.09 (syst) and S = -0.68 {+-} 0.30 (stat) {+-} 0.04 (syst). All results presented in this paper are preliminary.
Measurements Of Branching Fractions And Direct Cp Asymmetries In Pi Pi0 K Pi0 And K0 Pi0 B Decays
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Author :
language : en
Publisher:
Release Date : 2003
Measurements Of Branching Fractions And Direct Cp Asymmetries In Pi Pi0 K Pi0 And K0 Pi0 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 2003 with categories.
The authors present preliminary results of the analyses of B[sup+][yields] h[sup+][pi][sup 0] (with H[sup+]=[pi][sup+], K[sup+]) and B[sup 0][yields] K[sup 0][pi][sup 0] decays from a sample of approximately 88 million b[bar B] pairs collected by the BaBar detector at the PEP-II asymmetric-energy B Factory at SLAC. They measure the[pi][sup+][pi][sup 0] branching fraction and they obtain[Beta](B[sup+][yields][pi][sup+][pi][sup 0])= (5.5[sub -0.9][sup+1.0][+-] 0.6) x 10[sup -6] with a significance of 7.7[sigma] including systematic uncertainties. The measure the K[sup+][pi][sup 0] and K[sup 0][pi][sup 0] branching fractions to be[Beta](B[sup+][yields] K[sup+][pi][sup 0])= (12.8[sub -1.1][sup+1.2][+-] 1.0) x 10[sup -6] and[Beta](B[sup 0][yields] K[sup 0][pi][sup 0])= (10.4[+-] 1.5[+-] 0.8) x 10[sup -6]. At the same time, the direct CP-violating asymmetries are investigated and they find[Alpha][sub[pi][sup+][pi][sup 0]]= -0.03[sub -0.17][sup+0.18][+-] 0.02, [Alpha][sub K[sup+][pi][sup 0]]= -0.09[+-] 0.09[+-] 0.01and[Alpha][sub K[sup 0][pi][sup 0]]= 0.03[+-] 0.36[+-] 0.09, where the errors are statistical and systematic, respectively.
Measurement Of The Branching Fraction And The Cp Violating Asymmetry For The Decay B0 To K0s Pi0
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Author :
language : en
Publisher:
Release Date : 2005
Measurement Of The Branching Fraction And The Cp Violating Asymmetry For The Decay B0 To K0s 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 2005 with categories.
The authors measure the branching fraction and the CP-violating asymmetry of B° 2!K{sub S}°[pi]° decays with 227 million [Upsilon](4S) 2!B{bar B} events collected with the BABAR detector at the PEP-II asymmetric-energy ee− collider at SLAC. They obtain a branching fraction [Beta](B° 2!K°[pi]°) = (11.4 ± 0.9 ± 0.6) x 10−6 and CP-violating asymmetry parameters C{sub K{sub S}°[pi]°} = 0.06 ± 0.18 ± 0.03 and S{sub K{sub S}°[pi]°} = 0.35{sub -0.33}{sup +0.30} ± 0.04, where the first error is statistical and the second systematic.
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.
Measurements Of Branching Fractions And Cp Violating Asymmetries In B0 Pi Pi K Pi K K Decays
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Author :
language : en
Publisher:
Release Date : 2003
Measurements Of Branching Fractions And Cp Violating Asymmetries In B0 Pi Pi K Pi K K 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 2003 with categories.
We present measurements of branching fractions and CP-violating asymmetries for neutral B meson decays to two-body final states of charged pions and kaons. The results are obtained from a data sample of about 88 million[Upsilon](4S)[yields] B[bar B] decays collected between 1999 and 2002 with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. From a time-independent fit we measure the charge-averaged branching fractions[Beta](B[sup 0][yields][pi][sup+][pi][sup -])= (4.7[+-] 0.6[+-] 0.2) x 10[sup -6] and[Beta](B[sup 0][yields] K[sup+][pi][sup -])= (17.9[+-] 0.9[+-] 0.7) x 10[sup -6], where the first uncertainty is statistical and the second is systematic; the 90% confidence level upper limit[Beta](B[sup 0][yields] K[sup+]K[sup -])
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 Branching Fractions And Cp Asymmetries In B Wk Decays And First Observation Of The B0 Psi 2s Pi0 Decay
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Author : Veronika Chobanova
language : en
Publisher:
Release Date : 2015
Measurement Of Branching Fractions And Cp Asymmetries In B Wk Decays And First Observation Of The B0 Psi 2s Pi0 Decay written by Veronika Chobanova and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.