Measurement Of Branching Fractions In Radiative Bdecays To Eta K Gamma And Search For B Decays To Eta K Gamma PDF Download
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| Author | : B. Aubert |
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| Total Pages | : 7 |
| Release | : 2006 |
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Download Measurement of Branching Fractions in Radiative BDecays to Eta K Gamma and Search for B Decays to Eta' K Gamma Book in PDF, ePub and Kindle
The authors present measurements of the B {yields} {eta}K{gamma} branching fractions and upper limits for the B {yields} {eta}'K{gamma} branching fractions. For B{sup +} {yields} {eta}K{sup +}{gamma} they also measure the time-integrated charge asymmetry. The data sample, collected with the BABAR detector at the Stanford Linear Accelerator Center, represents 232 x 10{sup 6} produced B{bar B} pairs. The results for branching fractions and upper limits at 90% C.L. in units of 10{sup -6} are: {Beta}(B{sup 0} {yields} {eta}K{sup 0}{gamma}) = 11.3{sub -2.6}{sup +2.8} {+-} 0.6, {Beta}(B{sup +} {yields} {eta}K{sup +}{gamma}) = 10.0 {+-} 1.3 {+-} 0.5, {Beta}(B{sup 0} {yields} {eta}'K{sup 0}{gamma})
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| Total Pages | : 8 |
| Release | : 2004 |
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Download Branching Fraction Measurements of B --] Eta C K Decays Book in PDF, ePub and Kindle
We study the decays B 2![eta]{sub c}K and B° 2![eta]{sub c}K°, where the [eta]{sub c} is reconstructed in the K{sub S}° K{sup ±} [pi]{sup {-+}} and K+K− [pi]° decay modes. Results are based on a sample of 86 million B{bar B} pairs collected with the BABAR detector at the SLAC e+e− B Factory. We measure the branching fractions [Beta](B+ 2![eta]{sub c}K+) = (1.34 ± 0.09 ± 0.13 ± 0.41) x 10−3 and [Beta](B° 2![eta]{sub c}K°) = (1.18 ± 0.16 ± 0.13 ± 0.37) x 10−3, where the first error is statistical, the second is systematic, and the third reflects the [eta]{sub c} branching fraction uncertainty. In addition, we search for B 2![eta]{sub c}K events with [eta]{sub c} 2!2(K+K−) and [eta]{sub c} 2![phi][phi] and determine the [eta]{sub c} decay branching fraction ratios [Beta]([eta]{sub c} 2!2(K+K−))/[Beta]([eta]{sub c} 2!K{bar K}[pi]) = (2.3 ± 0.7 ± 0.6) x 10−2 and [Beta]([eta]{sub c} 2![phi][phi])/[Beta]([eta]{sub c} 2!K{bar K}[pi]) = (5.5 ± 1.4 {+-} 0.5) x 10−2.
| Author | : B. Aubert |
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| Total Pages | : 15 |
| Release | : 2006 |
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Download Measurement of B Decays to Phi K Gamma Book in PDF, ePub and Kindle
We measure the branching fraction of the radiative B{sup -} decay {Beta}(B{sup -} {yields} {phi}K{sup -}{gamma}) = (3.46 {+-} 0.57{sub -0.37}{sup +0.39}) x 10{sup -6}, and set an upper limit on the radiative {bar B}{sup 0} decay {Beta}({bar B}{sup 0} {yields} {phi}{bar K}{sup 0}{gamma})
| Author | : Aaron Kevin Yarritu |
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| Release | : 2010 |
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Download Measurements of B -] V Gamma Decays Book in PDF, ePub and Kindle
Observational evidence and theoretical motivation have led us to the conclusion that our current understanding of the universe is incomplete. While new physics is expected to exist above the electroweak scale, its influence can be detected by experiments that operate below this scale. The Babar experiment has recorded approximately 432 fb-1 of data at the center of mass energy of 10.58 GeV, which corresponds to the Y(4S) mass. One of the physics programs is studying radiative decays of the B meson. These decays primarily proceed through loop diagrams, and thus influences of new particles may be detectable. In this thesis, I present results of the measurements of the branching fractions, CP asymmetry, and isospin asymmetry of B -> K* gamma. Results are also presented for the measurements of the branching fractions of B -> rho(omega) gamma. Finally, a search for the decay of B -> phi gamma is given.
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| Total Pages | : 13 |
| Release | : 2004 |
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Download Measurement of the Exclusive Branching Fractions B° 2![eta]K*° and B 2![eta]K* Book in PDF, ePub and Kindle
The authors present the results of searches for B decays to the two charmless two-body final states B° 2![eta]K*° and B 2![eta]K*, based on 20.7 fb−1 of data collected in 1999 and 2000 with the BABAR detector at PEP-II. They find the branching fractions [Beta](B° 2![eta]K*°) = (19.8 {sub -5.6}{sup +6.5} ± 1.7) x 10−6 and [Beta](B+ 2![eta]K*+) = (22.1 {sub -9.2}{sup +11.1} ± 3.3) x 10−6, where the first error quoted is the statistical and the second systematic.
| Author | : Tilmann Colberg |
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| Total Pages | : 106 |
| Release | : 2002 |
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Download Measurement of the Branching Fraction and Search for Direct CP-violation in the Radiative Decay B to K * Gamma with the BABAR Detector Book in PDF, ePub and Kindle
| Author | : Tilmann Colberg |
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| Release | : 2002 |
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Download B K Gamma Book in PDF, ePub and Kindle
| Author | : K. Koeneke |
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| Release | : 2006 |
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Download Measurement of the Branching Fraction for the DecayB^{\pm} to K^{*\pm} Gamma, K^{*\pm} ToK^{\pm} \pi^{0} with the BaBar Detector Book in PDF, ePub and Kindle
The branching fraction of the radiative penguin B meson decay B{sup {+-}} {yields} K*{sup {+-}}{gamma} is measured at the PEP-II asymmetric energy e{sup +}e{sup -} collider, operating at a center of momentum energy of 10.58 GeV, the {Upsilon}(4S) resonance. This document concentrates on the case K*{sup {+-}} {yields} K{sup {+-}}{pi}{sup 0}; {pi}{sup 0} {yields} {gamma}{gamma}. This analysis is based on a dataset of 88.2-million {Upsilon}(4S) {yields} B{bar B} events corresponding to 81.3 fb{sup -1} collected with the BABAR detector.
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| Total Pages | : 9 |
| Release | : 2006 |
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Download Improved Measurements of the Branching Fractions for B0 Into Pi+pi- and B0 Into K+pi-, and a Search for B0 Into K+K- Book in PDF, ePub and Kindle
The authors present measurements of the branching fractions for the charmless two-body decays B° →??− and B° → K+?−, and a search for the decay B° → K+K−. They include the effects of final-state radiation from the daughter mesons for the first time, and quote branching fractions for the inclusive processes B° → h+h'−n?, where h and h' are pion or kaons. The maximum value of the sum of the energies of the n undetected photons, E{sub {gamma}}{sup max}, is mode-dependent. Using a data sample of approximately 227 million?(4S) → B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy e+e− collider at SLAC.
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| Total Pages | : 217 |
| Release | : 2010 |
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Download Measurements of B -] V Gamma Decays Book in PDF, ePub and Kindle
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 → V[gamma] (V = K*(892), [rho](770), [omega](782), [phi](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 → s transition is B → K*[gamma]. We present the best measurements of the branching fractions, direct CP, and isospin asymmetries of B → K*[gamma]. The analogous b → d transitions are B → [rho][gamma] and B → [omega][gamma], which are suppressed by a factor of.
