Download or read book A Search for the Rare Decay B sup 0 to D sub S sup Rho sup written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report on a search for the decay B[sup 0] --> D[sub s][sup +][rho][sup -] in a sample of 90 x 10[sup 6] [Upsilon](4S) decays into B meson pairs collected between 1999 and 2001 with the BABAR detector at the PEP-II asymmetric-energy e[sup +]e[sup -] collider. No significant excess of signal events above the expected background is observed. The authors set a 90% C.L. limit on the branching fraction B(B[sup 0] --> D[sub s][sup +][rho][sup -]) 1.9 x 10[sup -5]. Assuming a flavor SU(3) symmetry relation between the decays B[sup 0] -- D[sub s][sup +][rho][sup -] and B[sup 0] --> D[sup +][rho][sup -], they set a limit on the ratio of CKM-suppressed to CKM-favored amplitudes r(D[rho])

Download or read book A Search for the Rare Decay B to D sub S Rho 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 authors report on a search for the decay B° --> D{sub s}?− in a sample of 90 x 106?(4S) decays into B meson pairs collected between 1999 and 2001 with the BABAR detector at the PEP-II asymmetric-energy e+e− collider. No significant excess of signal events above the expected background is observed. The authors set a 90% C.L. limit on the branching fraction B(B° --> D{sub s}+?−) 1.9 x 10−5. Assuming a flavor SU(3) symmetry relation between the decays B° -- D{sub s}+?− and B° --> D+?−, they set a limit on the ratio of CKM-suppressed to CKM-favored amplitudes r(D?)

Download or read book Search for the Rare Decays B 0 to D s A 0 2 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: The authors have searched for the decays B{sup 0} {yields} D{sub s}{sup +}a{sub 0}{sup -}, B{sup 0} {yields} D*{sub s}{sup +} a{sub 0}{sup -}, B{sup 0} {yields} D{sub s}{sup +}a{sub 2}{sup -} and B{sup 0} {yields} D*{sub s}{sup +} a{sub 2}{sup -} in a sample of about 230 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. They find no evidence for these decays and set upper limits at 90% C.L. on the branching fractions: {Beta}(B{sup 0} {yields} D{sub s}{sup +} a{sub 0}{sup -})

Download or read book A Study of the Rare Decays B D sub S and B D sub S K written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report evidence for the decays B° → D{sub s}?− and B° → D{sub s}− K+ and the results of a search for B° → D{sub s}+?− and B° → D{sub s}− K+ in a sample of 84 million?(4S) decays into B{bar B} pairs collected with the BABAR detector at the PEP II asymmetric-energy e+e− storage ring. The authors measure the branching fractions?(B° → D{sub s}+?−) = (3.2 ± 0.9(stat.) ± 1.0(syst.)) x 10−5 and?(B° → D{sub s}− K+) = (3.2 ± 1.0(stat.) ± 1.0(syst.)) x 10−5. They also set 90% C.L. limits?(B° → D{sub s}{sup *+}?−)

Download or read book Search for the Decay B 0 A pm 1 rho mp 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: The authors present a search for the rare B-meson decay B{sup 0} {yields} {alpha}{sub 1}{sup {+-}}{rho}{sup {-+}} with {alpha}{sub 1}{sup {+-}} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup {+-}}. We use (110 {+-} 1.2) 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. They obtain an upper limit of 30 x 10{sup -6} (90% C.L.) for the branching fraction product {Beta}(B{sup 0} {yields} {alpha}{sub 1}{sup {+-}}{rho}{sup {-+}}) {Beta}({alpha}{sub 1}{sup {+-}} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup {+-}}), where they assume that the {alpha}{sub 1}{sup {+-}} decays exclusively to {rho}{sup 0}{pi}{sup {+-}}.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of the Rare Decays B0 Ds pi and B0 Ds K 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 report on the evidence for the decays B[sup 0][yields] D[sub s][sup+][pi][sup -] and B[sup 0][yields] D[sub s][sup -] K[sup+] and the results of a search for the decays B[sup 0][yields] D*[sub s][sup+][pi][sup -] and B[sup 0][yields] D*[sub s][sup -] K[sup+] from a sample of 84 million[Upsilon](4S) decays into B meson pairs collected with the BaBar detector at the PEP II asymmetric-energy e[sup+]e[sup -] collider. The measured B[sup 0][yields] D[sub s][sup+][pi][sup -] yield has a probability of less than 10[sup -3] to be a fluctuation of the background and they measure the branching fraction[Beta](B[sup 0][yields] D[sub s][sup+][pi][sup -])= (3.2[+-] 0.9(stat.)[+-] 1.0 (syst.)) x 10[sup -5]. The measured B[sup 0][yields] D[sub s][sup -] K[sup+] yield has a probability of less than 5 x 10[sup -4] to be a fluctuation of the background and they measure the branching fraction[Beta](B[sup 0][yields] D[sub s][sup -] K[sup+])= (3.2[+-] 1.0(stat.)[+-] 1.0(syst.)) x 10[sup -5]. They also set 90% C.L. limits[Beta](B[sup 0][yields] D*[sub s][sup+][pi][sup -])

Download or read book The Search for the Rare Decay B to A0 pi0 written by W. Vazquez and published by . This book was released on 2006 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for the decay B{+-} {yields} a{sub 0}{sup {+-}}{pi}{sup 0} with the a{sub 0}{sup +} decaying to an {eta} and a {pi}{sup +} was carried out at the Stanford Linear Accelerator Center using the BABAR detector coupled with the PEP-II collider. The analysis used a data sample comprised of approximately 252 million B{bar B} pairs collected at the {Upsilon}(4S) resonance. No signal was observed and a 90% confidence level upper limit on the branching fraction was set at 1.32 x 10{sup -6}.

Download or read book Drengen der blev Mission r written by and published by . This book was released on 1939 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Search for the Rare Decays B to D K0s written by and published by . This book was released on 2005 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report on the search for the rare decays B 2!D{sup (*)+} K{sub s}° in approximately 226 million [Upsilon](4S) 2!B{bar B} decays collected with the BABAR detector at the PEp-II asymmetric-energy B factory at SLAC. They do not observe any significant signal and they set 90% confidence level upper limits on the branching fractions, [Beta](B 2!D+K°)

Download or read book Search for the Rare Decay B0bar D 0 Gamma written by and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on a search for the rare decay {bar B}° → D*°[gamma], which in the standard model is dominated by W-exchange. The analysis is based on a data sample comprising 87.8 x 106 B{bar B} pairs collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. No significant signal is observed, and an upper limit on the branching fraction of 2.5 x 10−5 at the 90% confidence level is obtained.

Download or read book INIS Atomindex written by and published by . This book was released on 1988 with total page 1022 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Search for the Rare Decay B s 0 to mu mu at written by and published by . This book was released on 2013 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Search for the Rare Decay B rightarrow gamma gamma written by and published by . This book was released on 2011 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report the result of a search for the rare decay B° 2![gamma][gamma] in 426 fb−1 of data, corresponding to 226 million B°{bar B}° pairs, collected on the [Upsilon](4S) resonance at the PEP-II asymmetric-energy ee− collider using the BABAR detector. We use a maximum likelihood fit to extract the signal yield and observe 2112{sup +13} signal events with a statistical signficance of 1.9 [sigma]. This corresponds to a branching fraction [Beta](B° 2![gamma][gamma]) = (1.7 ± 1.1(stat.) ± 0.2(syst.)) x 10−7. Based on this result, we set a 90% confidence level upper limit of [Beta](B° 2![gamma][gamma])

Download or read book Histoire de derniere Guerre commenc e l an 1756 et finie par la Paix d Hubertsbourg le 15 Fevrier 1763 written by and published by . This book was released on 1768 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Observation of the Decay B0 rho rho and Measurement of the Branching Fraction and Polarization written by B. Aubert and published by . This book was released on 2003 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors 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. The number of observed events is 88{sub -21}{sup +23} {+-} 9, with a significance of 5.1 standard deviations with systematic uncertainties included. The branching fraction and the longitudinal polarization are measured to be {Beta}(B{sup 0} {yields} {rho}{sup +}{rho}{sup -}) = (25{sub -6-6}{sup +7+5}) x 10{sup -6} and {Lambda}{sub L}/{Lambda} = 0.98{sub -0.08}{sup +0.02} {+-} 0.03, respectively.