Measurement Of Branching Fractions And Cp Violating Asymmetries In B0 U2192 K0 Bar K 0 And B To Bar K 0k Decays At The Babar Experiment
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Measurement Of Branching Fractions And Cp Violating Asymmetries In B0 U2192 K0 Bar K 0 And B To Bar K 0k Decays At The Babar Experiment
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language : en
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Release Date : 2007
Measurement Of Branching Fractions And Cp Violating Asymmetries In B0 U2192 K0 Bar K 0 And B To Bar K 0k Decays At The Babar Experiment written by 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.
Over the last few years, the B factories have established the Cabbibo-Kobayashi-Maskawa mechanism of CP violation in the Standard Model through the study of the decays of B mesons. The focus of Belle and BaBar has now expanded to the search for signatures of new physics beyond the Standard Model, particularly through examination of flavor-changing neutral-current transitions, which proceed through diagrams involving virtual loops. These decays are suppressed in the Standard Model, increasing sensitivity to new-physics effects but decreasing branching fractions. Exploiting large and growing datasets, BaBar and Belle have made many measurements in loop decays where a b quark transitions to an s quark, observing hints of possible deviations from Standard Model expectations in CP-violating measurements.
Measurement Of Cp Violation In B0 To K0 And Of Branching Fraction And Cp Violation In B0 U2192 F0 980 K 0 Atop S
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language : en
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Release Date : 2006
Measurement Of Cp Violation In B0 To K0 And Of Branching Fraction And Cp Violation In B0 U2192 F0 980 K 0 Atop S written by 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.
The authors measure the time-dependent CP asymmetry parameters in B0 → K+K-K0 based on a data sample of approximately 277 million B-meson pairs recorded at the Y(4S) resonance with the BABAR detector at the PEP-II B-meson Factory at SLAC. They reconstruct two-body B0 decays to ?(1020)K$0top{S}$ and ?(1020)K$0top{L}$. Using a time-dependent maximum-likelihood fit, they measure sin2?eff(?K0) = 0.48 ± 0.28 ± 0.10, and C(?K0) = 0.16 ± 0.25 ± 0.09, where the first error is statistical, and the second is systematic. They also present measurements of the CP-violating asymmetries in the decay B0 → f0(→ ?+?-)K$0top{S}$. The results are obtained from a data sample of 209 x 106 Y(4S) → B$ar{B}$ decays, also collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. From a time-dependent maximum-likelihood fit they measure the mixing-induced CP violation parameter S(f0(980)K$0top{S}$) = - sin 2?efff0(980)K$0top{S}$ = -0.95$+0.32top{-0.23}$ ± 0.10 and the direct CP violation parameter C(f0(980)K$0top{S}$) = - 0.24 ± 0.31 ± 0.15, where the first errors are statistical and the second systematic. Finally, they present a measurement of the branching fraction of the decay B0 → f0(→ ?+?-)K$0top{S}$. From a time-dependent maximum likelihood fit to a data sample of 123 x 106 Y(4S) → B$ar{B}$ decays they find 93.6 ± 13.6 ± 6.4 signal events corresponding to a branching fraction of ?(B0 → f0(980)(→ ?+?-)K0) = (6.0 ± 0.9 ± 0.6 ± 1.2) x 10-6, where the first error is statistical, the second systematic, and the third due to model uncertainties.
Measurement Of Branching Fractions And Cp Violating Asymmetries In B Rho H
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language : en
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Release Date : 2003
Measurement Of Branching Fractions And Cp Violating Asymmetries In B Rho H 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 in B[sup 0][yields][rho][sup[+-]][pi][sup[-+]] and B[sup 0][yields][rho][sup -]K[sup+] decays. The results are obtained from a data sample of 88.9 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. From a time-dependent maximum likelihood fit we measure the charge-averaged branching fractions[Beta](B[sup 0][yields][rho][sup[+-]][pi][sup[-+]])= (22.6[+-] 1.8 (stat)[+-] 2.2 (syst)) x 10[sup -6] and[Beta](B[sup 0][yields][rho][sup -]K[sup+])= (7.3[sub -1.2][sup+1.3][+-] 1.3) x 10[sup -6]; and the CP-violating charge asymmetries A[sub CP][sup[rho][pi]]= -0.18[+-] 0.08[+-] 0.03 and A[sub CP][sup[rho]K]= 0.28[+-] 0.17[+-] 0.08; the direct CP violation parameter C[sub[rho][pi]]= 0.36[+-] 0.18[+-] 0.04 and the mixing-induced CP violation parameter S[sub[rho][pi]]= 0.19[+-] 0.24[+-] 0.03; and the dilution parameters[Delta]C[sub[rho][pi]]= 0.28[sub -0.19][sup+0.18][+-] 0.04 and[Delta]S[sub[rho][pi]]= 0.15[+-] 0.25[+-] 0.03.
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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language : en
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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.
Dedham Library Scrapbook 1972 1980
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language : en
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Release Date : 1972
Dedham Library Scrapbook 1972 1980 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Libraries categories.
2
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language : en
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Release Date : 1966
2 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with categories.
Measurement Of Cp Violation In B0 To Phi K0 And Of Branching Fraction And Cp Violation In B0 2 F0 980 K 0 Atop S
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language : en
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Release Date : 2006
Measurement Of Cp Violation In B0 To Phi K0 And Of Branching Fraction And Cp Violation In B0 2 F0 980 K 0 Atop S written by 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.
The authors measure the time-dependent CP asymmetry parameters in B0 2!K+K-K0 based on a data sample of approximately 277 million B-meson pairs recorded at the Y(4S) resonance with the BABAR detector at the PEP-II B-meson Factory at SLAC. They reconstruct two-body B0 decays to [Phi](1020)K$0\atop{S}$ and [Phi](1020)K$0\atop{L}$. Using a time-dependent maximum-likelihood fit, they measure sin2[beta]eff([Phi]K0) = 0.48 ± 0.28 ± 0.10, and C([Phi]K0) = 0.16 ± 0.25 ± 0.09, where the first error is statistical, and the second is systematic. They also present measurements of the CP-violating asymmetries in the decay B0 2!f0(2![pi]+[pi]- )K$0\atop{S}$. The results are obtained from a data sample of 209 x 106 Y(4S) 2!B$\bar{B}$ decays, also collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. From a time-dependent maximum-likelihood fit they measure the mixing-induced CP violation parameter S(f0(980)K$0\atop{S}$) = - sin 2[beta]efff0(980)K$0\atop{S}$ = -0.95$+0.32\atop{-0.23}$ ± 0.10 and the direct CP violation parameter C(f0(980)K$0\atop{S}$) = - 0.24 ± 0.31 ± 0.15, where the first errors are statistical and the second systematic. Finally, they present a measurement of the branching fraction of the decay B0 2!f0(2![pi]+[pi]- )K$0\atop{S}$. From a time-dependent maximum likelihood fit to a data sample of 123 x 106 Y(4S) 2!B$\bar{B}$ decays they find 93.6 ± 13.6 ± 6.4 signal events corresponding to a branching fraction of [beta](B0 2!f0(980)(2![pi]+[pi]- )K0) = (6.0 ± 0.9 ± 0.6 ± 1.2) x 10-6, where the first error is statistical, the second systematic, and the third due to model uncertainties.
Babar Explores Cp Violation
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language : en
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Release Date : 2003
Babar Explores Cp Violation 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 most recent results obtained by the BABAR experiment at the PEP-II asymmetric-energy B Factory at SLAC on CP-violating asymmetries and branching fractions for neutral and charged B decays are presented here. The analysis was performed on a data sample of[approx] 88 million[Upsilon](4S)[yields] B[bar B] decays collected between 1999 and 2002. Using b[yields] c[bar c]s decays, we measure sin2[beta]= 0.741[+-] 0.067(stat)[+-] 0.034(syst). We also present sin2[beta] measurements from, b[yields] s[bar s]s and b[yields] c[bar c]d processes. From neutral B meson decays to two-body final states of charged pions and kaons, we derive for the CP violating parameters, S[sub[pi][pi]]= 0.02[+-] 0.34[+-] 0.05[-0.54,+0.58] and C[sub[pi][pi]]= -0.30[+-] 0.25[+-] 0.04[-0.72,+0.12]. First results for B[yields][pi][sup+][pi][sup -][pi][sup 0] and K[sup[+-]][pi][sup[-+]][pi][sup 0] final states dominated by the[rho][sup[+-]] resonance, are also presented.
Measurement Of Branching Fractions And Cp Violating Asymmetries In B0 To K0k0bar And B To K0bark Decays At The Babar Experiment
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language : en
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Release Date : 2007
Measurement Of Branching Fractions And Cp Violating Asymmetries In B0 To K0k0bar And B To K0bark Decays At The Babar Experiment written by 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.
Over the last few years, the B factories have established the Cabbibo-Kobayashi-Maskawa mechanism of CP violation in the Standard Model through the study of the decays of B mesons. The focus of Belle and BaBar has now expanded to the search for signatures of new physics beyond the Standard Model, particularly through examination of flavor-changing neutral-current transitions, which proceed through diagrams involving virtual loops. These decays are suppressed in the Standard Model, increasing sensitivity to new-physics effects but decreasing branching fractions. Exploiting large and growing datasets, BaBar and Belle have made many measurements in loop decays where a b quark transitions to an s quark, observing hints of possible deviations from Standard Model expectations in CP-violating measurements.
Cp Violation In B Decays And The Babar Experiment
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language : en
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Release Date : 2002
Cp Violation In B Decays And The Babar Experiment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
During the first year of data taking, the 1999-2000 run, the BABAR detector at the SLAC PEP-II asymmetric collider has collected an integrated luminosity of 20.7 fb[sup -1] corresponding to 22.7 million B[bar B] pairs at the[Upsilon](4S) resonance. Using this data, we present the measurement of sin2[beta] based on samples of B[sup 0][yields] J/[psi] K[sub S][sup 0], B[sup 0][yields][psi](2S) K[sub S][sup 0] and B[sup 0][yields] J/[psi] K[sub L][sup 0] L decays. Our measured value is sin2[beta]= 0.34[+-] 0.20 (stat)[+-] 0.05 (syst). In addition we report on the measurement of branching fractions for exclusive B decays to charmonium final states, measurements of charged and neutral B meson lifetimes and also the B[sup 0][bar B][sup 0] oscillation frequency.