Download or read book Measurements of Branching Fractions and CP Asymmetries and Studies of Angular Distributions for B to Phi Phi K Decays written by and published by . This book was released on 2011 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present branching fraction and CP asymmetry measurements as well as angular studies of B 2![phi][phi]K decays using 464 x 106 B{bar B} events collected by the BABAR experiment. The branching fractions are measured in the [phi][phi] invariant mass range below the [eta]{sub c} resonance (m{sub [phi][phi]}

Download or read book Measurements of Branching Fractions Rate Asymmetries and Angular Distributions in the Rare Decays B Kl l and B K l L written by B. Aubert and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present measurements of the flavor-changing neutral current decays B {yields} K{ell}{sup +}{ell}{sup -} and B {yields} K*{ell}{sup +}{ell}{sup -}, where {ell}{sup +}{ell}{sup -} is either an e{sup +}e{sup -} or {mu}{sup +}{mu}{sup -} pair. The data sample comprises 229 x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II e{sup +}e{sup -} storage ring. Flavor-changing neutral current decays are highly suppressed in the Standard Model and their predicted properties could be significantly modified by new physics at the electroweak scale. We measure the branching fractions {Beta}(B {yields} K{ell}{sup +}{ell}{sup -}) = (0.34 {+-} 0.07 {+-} 0.02) x 10{sup -6}, {Beta}(B {yields} K*{ell}{sup +}{ell}{sup -}) = (0.78{sub -0.17}{sup +0.19} {+-} 0.11) x 10{sup -6}, the direct CP asymmetries of these decays, and the relative abundances of decays to electrons and muons. For two regions in {ell}{sup +}{ell}{sup -} mass, above and below m{sub J/{psi}}, we measure partial branching fractions and the forward-backward angular asymmetry of the lepton pair. In these same regions we also measure the K* longitudinal polarization in B {yields} K*{ell}{sup +}{ell}{sup -} decays. Upper limits are obtained for the lepton flavor-violating decays B {yields} Ke{mu} and B {yields} K*e{mu}. All measurements are consistent with Standard Model expectations.

Download or read book Measurements of Branching Fractions and CP Asymmetries in Decays of a B Meson to Two Phi Mesons and a K Meson written by Hulya Atmacan and published by . This book was released on 2010 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present measurements of the decays B[superscript +] [arrow right] [straight phi][straight phi] K [superscript +] and B[superscript o] [arrow right] [straight phi][straight phi] K [superscript o] using about 464 million BB[superscript -] pairs collected by the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We report the branching fractions of the decays B [superscript +] [arrow right] [straight phi][straight phi] K[superscript +] and B[superscript o] [arrow right] [straight phi][straight phi] K[superscript o], and CP asymmetry in the charged B mode for [straight phi][straight phi] invariant mass below 2.85 GeV/ c 2 : [Special characters omitted.] Additionally, we measure the direct CP asymmetry in B[superscript +] [arrow right] [straight phi][straight phi] K [superscript +] for [straight phi][straight phi] invariant mass within the [eta][subcript c] resonance region ([2.94-3.02] GeV/ c 2): [Special characters omitted.] No direct CP asymmetry is observed both below the [eta][subcript c] and within the [eta][subcript c] resonance, as expected within the Standard Model. In each case the uncertainties are statistical and systematic, respectively.

Download or read book Measurements of Branching Fractions in B 2 phi K and B 2 phi pi and Search for Direct CP Violation in B sup 2 phi K sup written by and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present measurements of branching fractions in the b 2!s{bar s}s penguin-dominated decays B 2![phi]K and B° 2![phi]K° in a sample of approximately 89 million B{bar B} pairs collected by the BABAR detector at the PEP-II asymmetric-energy B-meson Factory at SLAC. They determine [Beta](B+ 2![phi]K+) = (10.0{sub -0.8}{sup +0.9} ± 0.5) x 10−6 and [Beta](B° 2![phi]K°) = (8.4{sub -1.3}{sup +1.5} ± 0.5) x 10−6. Additionally, they measure the CP-violating charge asymmetry [Alpha]{sub CP}(B{sup ±} 2![phi]K{sup ±}) = 0.04 {+-} 0.09 {+-} 0.01, with a 90% confidence-level interval of [-0.10, 0.18], and set an upper limit on the CKM- and color-suppressed decay B+ 2![phi][pi]+, [Beta](B+ 2![phi][pi]+)

Download or read book A Measurement of the Branching Fractions and CP Asymmetries of the Decays B 2 K pi 0 and B 2 rho pi 0 at BaBar written by and published by . This book was released on 2005 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of the branching fractions (average over charge-conjugate decays), B, and CP violating asymmetries, ACP, of the decays B± → K*±[pi]0 and B± → [rho]±[pi]0 are presented.

Download or read book Measurement of Ratios of Branching Fractions and CP Violating Asymmetries of B D K Decays written by and published by . This book was released on 2008 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report a study of B{sup ±} 2!D*K{sup ±} decays with D* decaying to D[pi]° or D[gamma], using 383 x 106 B{bar B} pairs collected at the [Upsilon](4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. The D meson decays under study include a non-CP mode (K{sup ±}[pi]{sup {-+}}), CP-even modes (K{sup ±}K{sup {-+}}, [pi]{sup ±}[pi]{sup {-+}}) and CP-odd modes (K{sub S}°[pi]°, K{sub S}°[phi], K{sub S}°[omega]). They measure ratios (R*{sub CP±}) of branching fractions of decays to CP eigenmode states and to flavor-specific states as well as CP asymmetries A*{sub CP±} = -0.11 ± 0.09 ± 0.01, R*{sub CP+} = 1.31 ± 0.13 ± 0.04, and A*{sub CP-} = 0.06 ± 0.10 {+-} 0.02, R*{sub CP-} = 1.10 {+-} 0.12 {+-} 0.04, where the first error is statistical and the second error is systematic. Translating the results into an alternative parameterization, widely used for related measurements, they obtain x*+ = 0.11 {+-} 0.06 {+-} 0.02 and x* = 0.00 {+-} 0.06 {+-} 0.01. No significant CP-violating charge asymmetry is found in either the flavor-specific mode D 2!K{sup {+-}}[pi]{sup {-+}} or in B{sup {+-}} 2!D*[pi]{sup {+-}} decays.

Download or read book A Measurement of the Branching Fractions and CP Asymmetries of the Decays B u2192 K 0 and B u2192 0 at BaBar written by and published by . This book was released on 2005 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of the branching fractions (average over charge-conjugate decays), B, and CP violating asymmetries, ACP, of the decays B± → K*±?0 and B± → ?±?0 are presented.

Download or read book Measurements of Rates Asymmetries and Angular Distributions in Bd Kl l and Bd K l l Decays written by Jonathan Hollar and published by . This book was released on 2006 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book MEASUREMENTS OF BRANCHING FRACTIONS AND CP VIOLATING ASYMMETRIES IN B0 PI PI K PI K K DECAYS 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 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 -])

Download or read book Measurements of the Branching Fraction and CP Violating Asymmetries of B K s pi 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:

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.

Download or read book Measurements of the Branching Fraction and CP Violating Asymmetries of B sup 0 K sup 0 pi sup 0 Decays written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: No abstract prepared.

Download or read book A Measurement of the Branching Fractions and CP Asymmetries for the Decays B u2192 p and B u2192 K with the Babar Detector written by James Robert Gaillard and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Branching Fractions and CP Asymmetries in B0 K K Ks and B K KsKs 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 measure the branching fractions and CP asymmetries in the decays B° 2!KK−K{sub S}° and B 2!K+K{sub S}°K{sub S}° using a sample of approximately 122 million B{bar B} pairs collected by the BABAR detector. From a time-dependent analysis of the K+K− K{sub S}° sample that excludes [phi]K{sub S}°, the values of the CP-violation parameters are S = -0.56 ± 0.25 ± 0.04 and C = -0.10 ± 0.19 ± 0.10, where the first uncertainty is statistical, the second is systematic. They confirm that the final state is nearly purely CP-even. Using this result and setting C = 0, they extract the Standard Model parameter sin 2[beta] = 0.57 ± 0.26 ± 0.04−0{sup +0.17} where the last error is due to uncertainty on the CP content. The present the first measurement of the CP-violating charge asymmetry A{sub CP} B+ 2!K+K{sub S}°K{sub S}° = -0.04 ± 0.11 ± 0.02, with a 90% confidence-level interval of [-0.23, 0.15]. The branching fractions are [Beta](B° 2!K+K−K°) = (23.8 ± 2.0 ± 1.6) x 10−6 and [Beta](B+ 2!K+K{sub S}°K{sub S}°) = (10.7 ± 1.2 ± 1.0) x 10−6.

Download or read book 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 published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurements of Branching Fractions and Time Dependent CP Violating Asymmetries in B to Eta K 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 Measurements of Branching Fraction Ratios and mathit CP asymmetries in Suppressed B to D to K pi K and B to D to K pi pi Decays written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: