Download or read book Measurement of B0 Ds D Branching Fractions and B0 Ds D Polarization 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: The authors present a study of the decays B[sup 0][yields] D[sub s][sup (*)+] D*[sup -], using 20.8 fb[sup -1] of e[sup+]e[sup -] annihilation data recorded with the BABAR detector. 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. They 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 B[sup 0][yields] D[sub s][sup (*)+] D*[sup -] angular distributions, they measure the fraction of longitudinal polarization[Lambda][sub L]/[Lambda]= (51.9[+-] 5.0[+-] 2.8)%, which is consistent with theoretical predictions based on factorization.

Download or read book Measurement of the Branching Fraction for D S Phi Pi 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 model-independent measurement of[Beta](D[sub s][sup -][yields][phi][pi][sup -])/[Beta](D[sup 0][yields] K[sup -][pi][sup+]) by partially reconstructing the decay[bar B][sup 0][yields] D*[sup+]D*[sub s][sup -]. Using data collected with the CLEO II detector at CESR, they determine[Beta](D[sub s][sup -][yields][phi][pi][sup -])/[Beta](D[sup 0][yields] K[sup -][pi][sup+])= 0.92[+-] 0.20(stat.)[+-] 0.11(syst.). Their measurement of[Beta](D[sup 0][yields] K[sup -][pi][sup+]) then gives[Beta](D[sub s][sup -][yields][phi][pi][sup -])= (3.59[+-] 0.77[+-] 0.48)%.

Download or read book Measurement of the B0 to D D s and D s to Phi Pi Branching Fractions written by and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present measurements of the branching fractions?(B° → D*−D*{sub s}) and?(D{sub s}+ →??+), based on 123 x 106?(4S) → B{bar B} decays collected by the BABAR detector at the PEP-II asymmetric-energy e+e− B factory. A partial reconstruction technique is used to measure?(B° → D*−D*{sub s}+) and the decay chain is fully reconstructed to measure the branching fraction product?(B° → D*− D*{sub s}+) x?(D{sub s}+ →??+). Comparing these two measurements provides a model-independent determination of the D{sub s}+ →??+ branching fraction. They obtain?(B° → D*−D*{sub s}+) = (1.88 ± 0.09 ± 0.17)% and?(D{sub s}+ →??+) = (4.81 ± 0.52 ± 0.38)%, where the first uncertainties are statistical and the second systematic.

Download or read book 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 published by . This book was released on 2006 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

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.

Download or read book Measurement of the Ratios of Branching Fractions B Bs Ds Pi Pi Pi written by and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using 355 pb−1 of data collected by the CDF II detector in p{bar p} collisions at √s = 1.96 TeV at the Fermilab Tevatron, they study the fully reconstructed hadronic decays B{sub (s)}° → D{sub (s)}−? and B{sub (s)}° → D{sub (s)}−?+?+?−. They present the first measurement of the ratio of branching fractions?(B{sub s}° → D{sub s}−?+?+?−)/?(B° → D−?+?+?−) = 1.05 ± 0.10(stat.) ± 0.22(syst.). They also update their measurement of?(B{sub s}° → D{sub s}−?+)/?(B° → D−?+) to 1.13 ± 0.08(stat.) ± 0.23(syst.) improving the statistical uncertainty by more than a factor of two. They find?(B{sub s}° → D{sub s}−?+) = [3.8 ± 0.3(stat.) ± 1.3(syst.)] x 10−3 and?(B{sub s}° → D{sub s}−?+?+?−) = [8.4 ± 0.8(stat.) ± 3.2(syst.)] x 10−3.

Download or read book Measurement of the Ratios of Branching Fractions B B s 0 D s Pi written by and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 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 published by . This book was released on 2007 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book A New Measurement of B D Pi Branching Fractions written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The decays[Upsilon](4S)[yields] B[bar B], followed by B[yields] D*[pi] and D*[yields] D[pi], permit reconstruction of all kinematic quantities that describe the sequence without reconstruction of the D, with reasonably low backgrounds. Using an integrated e[sup+]e[sup -] luminosity of 3.1 fb[sup -1] accumulated at the[Upsilon](4S) by the CLEO-II detector, we report measurements of[Beta]([bar B][sup 0][yields] D*[sup+][pi][sup -])= (2.81[+-] 0.11[+-] 0.21[+-] 0.05) x 10[sup -3] and[Beta](B[sup -][yields] D*[sup 0][pi][sup -])= (4.34[+-] 0.33[+-] 0.34[+-] 0.18) x 10[sup -3].

Download or read book Preventie van psychische stoornissen written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of Branching Fractions and Resonance Contributions for B0 D0bar K Pi and Search for B0 D0 K Pi Decays written by and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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+?−)

Download or read book Measurement of the Ratio of Branching Fractions Br B0s right Arrow D s pi Br B0 right Arrow D pi at CEF 11 written by Ivan Krešimir Furić and published by . This book was released on 2004 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: The measurement of B0s mixing is one of the flagship analyses for the Run II B physics program. The sensitivity of the measurement to the frequency of B0s oscillations strongly depends on the number of reconstructed B0 mesons. We present the measurement of the ratio of branching fractions Br ..., which directly influences the number of B0s events available for the measurement of B0s mixing at CDF-II. We analyze 115 pb-l of data collected with the CDF-II detector in pp collisions at ... TeV using a novel displaced track trigger ...

Download or read book Measurement of the Branching Fractions for B0 D pi and B0 D rho written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Using 5.2 fb[sup -1] annihilation data recorded with the BABAR detector at the PEP-II storage ring while operating on the[Upsilon](4S) resonance, a sample of fully reconstructed B[sup 0] decays in the hadronic modes B[sup 0][yields] D*[sup -][pi][sup+] and B[sup 0][yields] D*[sup -][rho][sup+] have been reconstructed. In this paper, a study of these events is reported, including preliminary measurements of the absolute branching fractions for these modes, which are found to be B(B[sup 0][yields] D*[sup -][pi][sup+]= 2.9[+-] 0.3[+-] 0.3) x 10[sup -3] and B(B[sup 0][yields] D*[sup -][rho][sup+])= (11.2[+-] 1.1[+-] 2.5) x 10[sup -3].

Download or read book Measurement of the Ratio of Branching Fractions B D0 K Pi written by and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a measurement of R{sub B}, the ratio of the branching fraction for the rare decay D° → K?− to that for the Cabibbo-favored decay D° → K−?+. Charge conjugate decays are implicitly included. A signal of 2005 ± 104 events for the decay D° → K+?− is obtained using the CDF II detector at the Fermilab Tevatron collider. The data set corresponds to an integrated luminosity of 0.35 fb−1 produced in {bar p}p collisions at √s = 1.96 TeV. Assuming no mixing, they find R{sub B} = [4.05 ± 0.21(stat) ± 0.11(syst)] x 10−3. This measurement is consistent with the world average, and comparable in accuracy with the best measurements from other experiments.

Download or read book Measurement of Branching Fraction and Dalitz Distribution for B0 to D K0 Pi Decays written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of the Absolute Branching FractionsB to D pi D pi D pi with AMissing Mass Method written by J. C. Chen and published by . This book was released on 2006 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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}.

Download or read book Improved Measurements of Branching Fractions for B0 Pi pi K pi and Search for B0 K K written by J. C. Chen and published by . This book was released on 2005 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present preliminary measurements of branching fractions for the charmless two-body decays B{sup 0} {yields} {pi}{sup +}{pi}{sup -} and K{sup +}{pi}{sup -}, and a search for B{sup 0} {yields} K{sup +}K{sup -} using a data sample of approximately 227 million B{bar B} decays. Signal yields are extracted with a multi-dimensional maximum likelihood fit, and the efficiency is corrected for the effects of final-state radiation. We find the charge-averaged branching fractions (in units of 10{sup -6}): {Beta}(B{sup 0} {yields} {pi}{sup +}{pi}{sup -}) = 5.5 {+-} 0.4 {+-} 0.3; {Beta}(B{sup 0} {yields} K{sup +}{pi}{sup -}) = 19.2 {+-} 0.6 {+-} 0.6; and {Beta}(B{sup 0} {yields} K{sup +}K{sup -}) =