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Measurement Of The Branching Fraction And Polarization For The Decay B 2d K
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Book Synopsis Measurement of the Branching Fraction and Polarization for the Decay B− 2!D*° K*− by :
Download or read book Measurement of the Branching Fraction and Polarization for the Decay B− 2!D*° K*− written by and published by . This book was released on 2003 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a study of the decay B− → D*° K*− based on a sample of 86 million [Upsilon](4S) → 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− → D*° K*−) = (8.3 ± 1.1(stat) ± 1.0(syst)) x 10−4, and the fraction of longitudinal polarization in this decay to be [Lambda]{sub L}/[Lambda] = 0.86 ± 0.06(stat) ± 0.03(syst).
Book Synopsis Measurement of the Branching Fraction and Polarization for the Decay B[sup -][yields] D*[sup 0] K*[sup -]. by :
Download or read book Measurement of the Branching Fraction and Polarization for the Decay B[sup -][yields] D*[sup 0] K*[sup -]. written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).
Book Synopsis Measurement of the Branching Fraction and Polarization for the Decay B- ---] D*0K*- by :
Download or read book Measurement of the Branching Fraction and Polarization for the Decay B- ---] D*0K*- written by and published by . This book was released on 2003 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurements of Branching Fraction, Polarization, and Direct CP-Violating Asymmetry in B --] K*°?+ Decays by :
Download or read book Measurements of Branching Fraction, Polarization, and Direct CP-Violating Asymmetry in B --] K*°?+ Decays written by and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this analysis is the simultaneous measurement of the branching fraction, the longitudinal-polarization component, and the direct-CP-violating charge asymmetry for the B --> vector-vector decay mode B --> K*°?+, which has previously not been seen experimentally. The measurement of the polarization of the penguin decay is of special interest. There is no tree contribution to the decay amplitude and only a very small annihilation process. The polarization of the B+ --> K*°?+ decay mode can be compared to that already measured for the similar penguin decay B --> K*?
Book Synopsis Measurements of Branching Fraction, Polarization, and Direct CP-Violating Asymmetry in B[sup +] --] K*[sup 0] [rho][sup +] Decays by :
Download or read book Measurements of Branching Fraction, Polarization, and Direct CP-Violating Asymmetry in B[sup +] --] K*[sup 0] [rho][sup +] Decays written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this analysis is the simultaneous measurement of the branching fraction, the longitudinal-polarization component, and the direct-CP-violating charge asymmetry for the B --> vector-vector decay mode B[sup +] --> K*[sup 0][rho][sup +], which has previously not been seen experimentally. The measurement of the polarization of the penguin decay is of special interest. There is no tree contribution to the decay amplitude and only a very small annihilation process. The polarization of the B[sup +] --> K*[sup 0][rho][sup +] decay mode can be compared to that already measured for the similar penguin decay B --> K*[phi].
Book Synopsis Measurements of Branching Fractions, Polarizations, and Direct CP-violation Asymmetries in B -] Rho0 K* and B -] F0(980) K* Decays by :
Download or read book Measurements of Branching Fractions, Polarizations, and Direct CP-violation Asymmetries in B -] Rho0 K* and B -] F0(980) K* Decays written by and published by . This book was released on 2011 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present measurements of the branching fractions, longitudinal polarization, and direct CP-violation asymmetries for the decays B →?°K*+ and B+ f0(980)K*+ with a sample of (467 ± 5) x 106 B{bar B} pairs collected with the BABAR detector at the PEP-II asymmetric-energy e+e− collider at the SLAC National Accelerator Laboratory. We observe B+ →?°K*+ with a significance of 5.3? and measure the branching fraction?(B+ →?°K*+) = (4.6 ± 1.0 ± 0.4) x 10−6, the longitudinal polarization f{sub L} = 0.78 ± 0.12 ± 0.03, and the CP-violation asymmetry A{sub CP} = 0.31 ± 0.13 ± 0.03. We observe B+ → f0(980)K*+ and measure the branching fraction?(B+ → f0(980)K*+) x?(f0(980) →?+?−) = (4.2 ± 0.6 ± 0.3) x 10−6 and the CP-violation asymmetry A{sub CP} = -0.15 ± 0.12 ± 0.03. The first uncertainty quoted is statistical and the second is systematic.
Book Synopsis Measurement of Branching Fraction and Polarization in the Decay [Beta]0 [right Arrow] [rho]+[rho]− by : Yuriy V. Groysman
Download or read book Measurement of Branching Fraction and Polarization in the Decay [Beta]0 [right Arrow] [rho]+[rho]− written by Yuriy V. Groysman and published by . This book was released on 2008 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis MEASUREMENT OF B0 ---] D(S)(*)+D*- BRANCHING FRACTIONS AND POLARIZATION IN THE DECAY B0 ---] DS(*FILE) WITH A PARTIAL RECONSTRUCTION TECHNIQUE. by :
Download or read book MEASUREMENT OF B0 ---] D(S)(*)+D*- BRANCHING FRACTIONS AND POLARIZATION IN THE DECAY B0 ---] DS(*FILE) WITH A PARTIAL RECONSTRUCTION TECHNIQUE. written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present measurements of the decays B[sup 0][yields] D[sub s][sup (*)+] D*[sup -], using data recorded by the BABAR detector in 1999 and 2000, consisting of 20.8 fb[sup -1]. The analysis is conducted with a partial reconstruction technique, in which only the D[sub s][sup (*)+] and the soft pion from the D*[sup -] decay are reconstructed. From the observed rates, we measure the branching fractions[Beta](B[sup 0][yields] D[sub s][sup+] D*[sup -])= (1.03[+-] 0.14[+-] 0.13[+-] 0.26)% and[Beta](B[sup 0][yields] D*[sub s][sup+] D*[sup -])= (1.97[+-] 0.15[+-] 0.30[+-] 0.49)%, where the first error is statistical, the second is systematic, and the third is the error due to the D[sub s][sup+][yields][phi][pi][sup+] branching fraction uncertainty. From the[Beta](B[sup 0][yields] D*[sub s][sup+] D*[sup -]) angular distributions, we measure the fraction of longitudinal polarization[Lambda][sub L]/[Lambda]= (51.9[+-] 5.0[+-] 2.8)%, which is consistent with the theoretical prediction, based on factorization. These results are preliminary.
Book Synopsis Measurement of the Branching Fraction for the Decay B°--]D{sup *+}D{sup *-} by :
Download or read book Measurement of the Branching Fraction for the Decay B°--]D{sup *+}D{sup *-} written by and published by . This book was released on 2001 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decays of the type B 2!D{sup (*)} {bar D}(*) can be used to provide a measurement of the parameter sin2[beta] of the Unitarity Triangle that is complementary to the measurement derived from the mode B° 2!K{sub S}°. In this document we report a measurement of the branching fraction for the decay B° 2!D*D*− with the BABAR detector. With data corresponding to an integrated luminosity of 20.7 fb−1 collected at the [Upsilon](4S) resonance during 1999-2000, we have reconstructed 38 candidate signal events in the mode B° 2!D*D*− with an estimated background of 6.2 ± 0.5 events. From these events, we determine the branching fraction to be [Beta](B° 2!D*+D*−) = (8.0 ± 1.6(stat) ± 1.2(syst)) x 10−4 (preliminary). The measured fraction of the component with odd CP parity is 0.27± 0.17(stat) ± 0.02(syst).
Book Synopsis Branching Fraction Measurements of the Color-Suppressed Decays B0bar to D(*)0 Pi0, D(*)0 Eta, D(*)0 Omega, and D(*)0 Eta_prime and Measurement of the Polarization in the Decay B0bar to D*0 Omega by :
Download or read book Branching Fraction Measurements of the Color-Suppressed Decays B0bar to D(*)0 Pi0, D(*)0 Eta, D(*)0 Omega, and D(*)0 Eta_prime and Measurement of the Polarization in the Decay B0bar to D*0 Omega written by and published by . This book was released on 2012 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report updated branching fraction measurements of the color-suppressed decays {bar B}° → D°?°, D*°?°, D°?, D*°?, D°?, D*°?, D°?', and D*°?'. We measure the branching fractions (x10−4):?({bar B}° → D°?°) = 2.69 ± 0.09 ± 0.13,?({bar B}° → D*°?°) = 3.05 ± 0.14 ± 0.28,?({bar B}° → D°?) = 2.53 ± 0.09 ± 0.11,?({bar B}° → D*°?) = 2.69 ± 0.14 ± 0.23,?({bar B}° → D°?) = 2.57 ± 0.11 ± 0.14,?({bar B}° → D*°?) = 4.55 ± 0.24 ± 0.39,?({bar B}° → D°?') = 1.48 ± 0.13 ± 0.07, and?({bar B}° → D*°?') = 1.49 ± 0.22 ± 0.15. We also present the first measurement of the longitudinal polarization fraction of the decay channel D*°?, f{sub L} = (66.5 ± 4.7 ± 1.5)%. In the above, the first uncertainty is statistical and the second is systematic. The results are based on a sample of (454 ± 5) x 106 B{bar B} pairs collected at the?(4S) resonance, with the BABAR detector at the PEP-II storage rings at SLAC. The measurements are the most precise determinations of these quantities from a single experiment. They are compared to theoretical predictions obtained by factorization, Soft Collinear Effective Theory (SCET) and perturbative QCD (pQCD). We find that the presence of final state interactions is favored and the measurements are in better agreement with SCET than with pQCD.
Download or read book Measurements of B to V? Decays written by and published by . This book was released on 2010 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: The standard model has been highly successful at describing current experimental data. However, extensions of the standard model predict particles that have masses at energy scales that are above the electroweak scale. The flavor-changing neutral current processes of the B meson are sensitive to the influences of these new physics contributions. These processes proceed through loop diagrams, thus allowing new physics to enter at the same order as the standard model. New physics may contribute to the enhancement or suppression of rate asymmetries or the decay rates of these processes. The transition B 2!V? (V = K*(892),?(770),?(782),?(1020)) represents radiative decays of the B meson that proceed through penguin processes. Hadronic uncertainties limit the theoretical accuracy of the prediction of the branching fractions. However, uncertainties, both theoretical and experimental, are much reduced when considering quantities involving ratios of branching fractions, such as CP or isospin asymmetries. The most dominant exclusive radiative b 2!s transition is B 2!K*?. We present the best measurements of the branching fractions, direct CP, and isospin asymmetries of B 2!K*?. The analogous b 2!d transitions are B 2!?? and B 2!??, which are suppressed by a factor of.
Book Synopsis Measurement of the Branching Fraction for B- --] D0 K*- by :
Download or read book Measurement of the Branching Fraction for B- --] D0 K*- written by and published by . This book was released on 2004 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a measurement of the branching fraction for the decay B− → D°K*− using a sample of approximately 86 million B{bar B} pairs collected by the BABAR detector from ee− collisions near the?(4S) resonance. The D° is detected through its decays to K−?+, K−?+?° and K−?+?−?+, and the K*− through its decay to K{sub S}°?−. They measure the branching fraction to be?(B− → D°K*−) = (6.3 ± 0.7(stat.) ± 0.5(syst.)) x 10−4.
Book Synopsis Measurement of the Branching Fraction for the Decay B± [arrow] K*±[gamma], K*± [arrow] K±[pi]0 with the BaBar Detector by : Karsten Köneke
Download or read book Measurement of the Branching Fraction for the Decay B± [arrow] K*±[gamma], K*± [arrow] K±[pi]0 with the BaBar Detector written by Karsten Köneke and published by . This book was released on 2003 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Branching Fraction and Lambda-bar Polarization in B0 -> Lambda-par P Pi-. by :
Download or read book Measurement of the Branching Fraction and Lambda-bar Polarization in B0 -> Lambda-par P Pi-. written by and published by . This book was released on 2009 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a measurement of the B° → {bar ?}p?− branching fraction performed using the BABAR detector at the PEP-II asymmetric e+e− collider. Based on a sample of 467 x 106 B{bar B} pairs we measure ?(B° → {bar ?}p?−) [3.07 ± 0.31(stat.) ± 0.23(syst.)] x 10−6. The measured differential spectrum as a function of the dibaryon invariant mass m({bar ?}p) shows a near-threshold enhancement similar to that observed in other baryonic B decays. We study the {bar ?} polarization as a function of {bar ?} energy in the B° rest frame (E*{sub {bar ?}}) and compare it with theoretical expectations of fully longitudinally right-polarized {bar ?} at large E*{sub {bar ?}}.
Book Synopsis Measurements of Branching Fraction Ratios and CP-asymmetries in Suppressed B-2!D(2!K+[pi]- )K- and B-2!D(2!K+[pi]- )[pi]- Decays by :
Download or read book Measurements of Branching Fraction Ratios and CP-asymmetries in Suppressed B-2!D(2!K+[pi]- )K- and B-2!D(2!K+[pi]- )[pi]- Decays written by and published by . This book was released on 2011 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report the first reconstruction in hadron collisions of the suppressed decays B-2!D(2!K+[pi]- )K- and B-2!D(2!K+[pi]- )[pi]- decays, sensitive to the CKM phase [gamma], using data from 7 fb-1 of integrated luminosity collected by the CDF II detector at the Tevatron collider. We reconstruct a signal for the B-2!D(2!K+[pi]- )K- suppressed mode with a significance of 3.2 standard deviations, and measure the ratios of the suppressed to favored branching fractions R(K) = [22.0 " 8.6(stat) " 2.6(syst)] x 10-3, R+(K) = [42.6 " 13.7(stat) " 2.8(syst)] x 10-3, R-(K) = [3.8 " 10.3(stat) " 2.7(syst)] x 10-3 as well as the direct CP-violating asymmetry A(K) = -0.82"0.44(stat)"0.09(syst) of this mode. Corresponding quantities for B- 2!D(2!K+[pi]- )[pi]- decay are also reported.
Book Synopsis Measurement of the Polarization in the Decays B° → J/?K*° and B{sub S}° → J/?? by :
Download or read book Measurement of the Polarization in the Decays B° → J/?K*° and B{sub S}° → J/?? written by and published by . This book was released on 1995 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report on a measurement of the longitudinal polarization fraction in the decay B° → J/?K*° using data collected with the Collider Detector at Fermilab. B° mesons are reconstructed through the decay chain B° → J/? K*°, J/? →??−, K*° → K+?−. A sample of 65 ± 10 events is used to obtain the result?{sub L}/? = 0.65 ± 0.10 (stat) ± 0.04 (sys). The first measurement of?{sub L}/? in the decay B{sub s}° → J/?? is also presented.
Book Synopsis Observation of the Decay B0-]rho+rho- and Measurement of the Branching Fraction and Polarization by :
Download or read book Observation of the Decay B0-]rho+rho- and Measurement of the Branching Fraction and Polarization written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have observed the rare decay B[sup 0] [yields] [rho][sup +][rho][sup -] in a sample of 89 million B[bar B] pairs recorded with the BABAR detector. We measure the branching fraction [Beta](B[sup 0] [yields] [rho][sup +][rho][sup -]) = (27[sub -6-7][sup +7+5]) x 10[sup -6] and determine the longitudinal polarization fraction [Lambda][sub L]/[Lambda] = 0.99[sub -0.07][sup +0.01] [+-] 0.03. The results are preliminary.
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