Measurement of the Ratio of Decay Amplitudes for B0bar -] J/psi K*0 and B0 -] J/psi K*0 PDF Download
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![Measurement of the Ratio of Decay Amplitudes for B0bar -] J/psi K*0 and B0 -] J/psi K*0 PDF](https://books.google.com/books/content/images/frontcover/3KnbjwEACAAJ?fife=w150-h200)
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We have measured the time-dependent decay rate for the process B [yields] J/[psi] K*[sup 0](892) in a sample of about 88 million [Upsilon](4S) [yields] B[bar B] decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. In this sample we study flavor-tagged events in which one neutral B meson is reconstructed in the J/[psi]K*[sup 0] or J/[psi] [bar K]*[sup 0] final state. We measure the coefficients of the cosine and sine terms in the time-dependent asymmetries for J/[psi]K*[sup 0] and J/[psi][bar K]*[sup 0], find them to be consistent with the Standard Model expectations, and set upper limits at 90% C.L. on the decay amplitude ratios A([bar B][sup 0] [yields] J/[psi]K*[sup 0])/A(B[sup 0] [yields] J/[psi]K*[sup 0])
![Measurement of the Ratio of Decay Amplitudes for B0bar -] J/psi K*0 and B0 -] J/psi K*0 PDF](https://books.google.com/books/content/images/frontcover/3KnbjwEACAAJ?fife=w80-h100)
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Languages : en
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We have measured the time-dependent decay rate for the process B [yields] J/[psi] K*[sup 0](892) in a sample of about 88 million [Upsilon](4S) [yields] B[bar B] decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. In this sample we study flavor-tagged events in which one neutral B meson is reconstructed in the J/[psi]K*[sup 0] or J/[psi] [bar K]*[sup 0] final state. We measure the coefficients of the cosine and sine terms in the time-dependent asymmetries for J/[psi]K*[sup 0] and J/[psi][bar K]*[sup 0], find them to be consistent with the Standard Model expectations, and set upper limits at 90% C.L. on the decay amplitude ratios A([bar B][sup 0] [yields] J/[psi]K*[sup 0])/A(B[sup 0] [yields] J/[psi]K*[sup 0])
![Measurement of the Decay Amplitudes and Branching Fractions of B -] J Psi K* and B -] J/psi K Decays PDF](https://books.google.com/books/content/images/frontcover/Nbf_jwEACAAJ?fife=w80-h100)
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Using data taken with the CLEO II detector, we present the first full angular analysis in the color-suppressed modes B[sup 0][yields] J/[psi] K*[sup 0] and B[sup+][yields] J/[psi] K*[sup+]. This leads to a complete determination of the decay amplitudes of these modes. In addition, we update the branching fractions for B[yields] J/[psi] K and B[yields] J/[psi] K*.
![Measurement of the B--]J/psi K*(892) Decay Amplitudes PDF](https://books.google.com/books/content/images/frontcover/lk6FAQAACAAJ?fife=w80-h100)
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Languages : en
Pages : 5
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Author: B. Aubert
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Languages : en
Pages : 19
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We perform the first three-dimensional measurement of the amplitudes of B {yields} {psi}(2S)K* and B {yields} {chi}{sub c1}K* decays and update our previous measurement for B {yields} J/{psi} K*. We use a data sample collected with the BABAR detector at the PEP-II storage ring, representing 232 million produced B{bar B} pairs. The longitudinal polarization of decays to the 1{sup ++} {chi}{sub c1} meson together with a K* meson, is found to be larger than that for the decay to the 1{sup --} {Psi} mesons. No direct CP-violating charge asymmetry is observed.
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Languages : en
Pages : 7
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The authors perform the first three-dimensional measurement of the amplitudes of B → [psi](2S)K* and B → [chi]{sub c1}K* decays and update the previous measurement B → J/[psi]K*. They use a data sample collected with the BABAR detector at the PEP-II storage ring, corresponding to 232 million B{bar B} pairs. The longitudinal polarization of decays involving a J{sup PC} = 1{sup ++} [chi]{sub c1} meson is found to be larger than that with a 1−− J/[psi] or [psi](2S) meson. No direct CP-violating charge asymmetry is observed.
![Study of B{sup {+-}} 2!J/[psi] [pi]{sup {+-}} and B{sup {+-}} 2!J/[psi] K{sup {+-}} Decays PDF](https://books.google.com/books/content/images/frontcover/O0WoAQAACAAJ?fife=w80-h100)
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Languages : en
Pages : 7
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The authors study B{sup ±} → J/[psi] [pi]{sup ±} and B{sup ±} → J/[psi] K{sup ±} decays in a sample of about 89 million B{bar B} pairs collected with the BABAR detector at the PEP-II asymmetric B-factory at SLAC. They observe a signal of 244 ± 20 B{sup ±} → J/[psi] [pi]{sup ±} events and determine the ratio [Beta](B{sup {+-}} → J/[psi] [pi]{sup {+-}})/[Beta](B{sup {+-}} → J/[psi] K{sup {+-}}) to be [5.37 {+-} 0.45(stat.) {+-} 0.11(syst.)]%. The charge asymmetries for the B{sup {+-}} → J/[psi] [pi]{sup {+-}} and B{sup {+-}} → J/[psi] K{sup {+-}} decays are determined to be [Alpha]{sub {pi}} = 0.123 {+-} 0.085(stat.) {+-} 0.004(syst.) and [Alpha]{sub K} = 0.030 {+-} 0.015(stat.) {+-} 0.006(syst.), respectively.
![Study of the B- --] J/psi K- Pi+ Pi- Decay and Measurement of the B- --] X(3872) K- Branching Fraction PDF](https://books.google.com/books/content/images/frontcover/Zx3_jwEACAAJ?fife=w80-h100)
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Languages : en
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The authors study the decay B[sup -] [yields] J/[psi]K[sup -][pi][sup +][pi][sup -] using 117 million B[bar B] events collected at the [Upsilon](4S) resonance with the BaBar detector at the PEP-II e[sup +]e[sup -] asymmetric-energy storage ring. They measure the branching fractions [Beta](B[sup -] [yields] J/[psi]K[sup -] [pi][sup +][pi][sup -]) = (116 [+-] 7(stat.) [+-] 9(syst.)) x 10[sup -5] and [Beta](B[sup -] [yields] X(3872)K[sup -]) x [Beta](X(3872) [yields] J/[psi][pi][sup +][pi][sup -]) = (1.28 [+-] 0.41) x 10[sup -5] and find the mass of the X(3872) to be 3873.4 [+-] 1.4MeV/c[sup 2]. They search for the h[sub c] narrow state in the decay B[sup -] [yields] h[sub c] K[sup -], h[sub c] [yields] J/[psi][pi][sup +][pi][sup -] and for the decay B[sup -] [yields] J/[psi]D[sup 0][pi][sup -], with D[sup 0] [yields] K[sup -][pi][sup +]. They set the 90% C.L. limits [Beta](B[sup -] [yields] h[sub c]K[sup -]) x [Beta](h[sub c] [yields] J/[psi][pi][sup +][pi][sup -])
![A Study of B+/- --] J/psi Pi+/- and B+/- --] J/psi K+/- Decays PDF](https://books.google.com/books/content/images/frontcover/jTVcnQAACAAJ?fife=w80-h100)
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Languages : en
Pages : 5
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We have studied the B{sup ±} → J/[psi][pi]{sup ±} and B{sup ±} → J/[psi] K{sup ±} decays using a 20.7 fb−1 data set collected with the BABAR detector. We observe a signal of 51 ± 10 B{sup ±} → J/[psi][pi]{sup ±} events and determine the ratio [Beta](B{sup {+-}} → J/[psi][pi]{sup {+-}})/[Beta](B{sup {+-}} → J/[psi] K{sup {+-}}) to be [3.91 {+-} 0.78(stat.) {+-} 0.19(syst.)]%. The CP-violating charge asymmetries for the B{sup {+-}} → J/[psi] [pi]{sup {+-}} and B{sup {+-}} → J/[psi] K{sup {+-}} decays are determined to be [Alpha]{sub {pi}} = 0.01 {+-} 0.22(stat.) {+-} 0.01(syst.) and [Alpha]{sub K} = 0.003 {+-} 0.030(stat.) {+-} 0.004(syst.).
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![Branching Ratio Measurements of B - J/[psi Eta]K and B± - D0K± with D0 - [pi][pi]−[pi]0 PDF](https://books.google.com/books/content/images/frontcover/B33NSgAACAAJ?fife=w80-h100)
Author: Qinglin Zeng
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Category : Beta decay
Languages : en
Pages : 490
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