Branching Fractions And Cp Asymmetries In Two Body Nonleptonic Charmless B Hadron Decays PDF Download
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Author | : Andreas Warburton |
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Total Pages | : 4 |
Release | : 2004 |
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Download Branching Fractions and CP Asymmetries in Two-body Nonleptonic Charmless B-hadron Decays Book in PDF, ePub and Kindle
Relative branching fractions of B{sub d, s}{sup 0} {yields} h{sup +}h'{sup -} decays (where h, h' = K or {pi}) and the direct Cp asymmetry A{sub CP} in the B{sub d}{sup 0} {yields} K{sup +}{pi}{sup -} mode are measured with 179 {+-} 11 pb {sup -1} of data collected using the CDF II detector at the Fermilab Tevatron p{bar p} collider. The first branching-fraction measurement of a B{sub s}{sup 0} meson to two pseudoscalars, {Beta}(B{sub s}{sup 0} {yields} K{sup +} K{sup -}), and a search for the baryon mode {Lambda}{sub b}{sup 0} {yields} p{sup +} h{sup -} are also presented, in addition to branching-fraction limits on the rare channels B{sub s}{sup 0} {yields} K{sup +} {pi}{sup -}, B{sub d}{sup 0} {yields} K{sup +}K{sup -}, and B{sub s}{sup 0} {yields} {pi}{sup +}{pi}{sup -}.
Author | : 吳姿瑩 |
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Release | : 2011 |
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Download Measurements of Branching Fractions and CP Asymmetries in Charmless Hadronic Two-body Neutral-B Meson Decays Book in PDF, ePub and Kindle
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Release | : 2004 |
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Download Measurements of Branching Fractions and CP-Violating Asymmetries in B Meson Decays to Charmless Two-Body States Containing a K[sup 0]. Book in PDF, ePub and Kindle
The authors present measurements of branching fractions and CP-violating asymmetries in decays of B mesons to two-body final states containing a K[sup 0]. The results are based on a data sample of approximately 88 million [Upsilon](4S) [yields] B[bar B] decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC.
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Release | : 2004 |
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Download Measurements of Branching Fractions and CP-Violating Asymmetries in B-Meson Decays to the Charmless Two-Body States K[sup 0]pi+, K-bar[sup 0]K[sup +], and K[sup 0]K-bar[sup 0]. Book in PDF, ePub and Kindle
The authors present preliminary measurements of the branching fraction and the CP-violating charge asymmetry in the B[sup +] --> K[sup 0][pi][sup +] decay, and a preliminary measurement of the branching fraction of the B[sup 0] --> K[sup 0][bar K][sup 0] decay. No evidence of direct CP violation in the B[sup +] --> K[sup 0][pi][sup +] mode is observed. The B[sup 0] --> K[sup 0][bar K][sup 0] measurement constitutes the first observation of this decay channel: the probability of obtaining the result assuming the null-signal hypothesis is 3.4 x 10[sup -6]. The authors have also searched for the B[sup +] --> [bar K][sup 0]K[sup +] decay and set an upper limit on its branching fraction at 2.35 x 10[sup -6] at the 90% C.L. The branching-fraction measurements reported here are consistent with previous measurements of the same quantities, but are extracted from a data sample larger by a factor of 2.6.
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Total Pages | : 5 |
Release | : 2004 |
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Download Measurements of Branching Fractions and CP-Violating Asymmetries in B-Meson Decays to the Charmless Two-Body States K°pi+, K-bar°K, and K°K-bar° Book in PDF, ePub and Kindle
The authors present preliminary measurements of the branching fraction and the CP-violating charge asymmetry in the B --> K°?+ decay, and a preliminary measurement of the branching fraction of the B° --> K°{bar K}° decay. No evidence of direct CP violation in the B+ --> K°?+ mode is observed. The B° --> K°{bar K}° measurement constitutes the first observation of this decay channel: the probability of obtaining the result assuming the null-signal hypothesis is 3.4 x 10−6. The authors have also searched for the B+ --> {bar K}°K+ decay and set an upper limit on its branching fraction at 2.35 x 10−6 at the 90% C.L. The branching-fraction measurements reported here are consistent with previous measurements of the same quantities, but are extracted from a data sample larger by a factor of 2.6.
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Total Pages | : 18 |
Release | : 2012 |
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Download Measurement of CP Asymmetries and Branching Fractions in Charmless Two-Body B-Meson Decays to Pions and Kaons Book in PDF, ePub and Kindle
We present improved measurements of CP-violation parameters in the decays B° →??−, B° → K+?−, and B° →?°?°, and of the branching fractions for B° →?°?° and B° → K°?°. The results are obtained with the full data set collected at the?(4S) resonance by the BABAR experiment at the PEP-II asymmetric-energy B factory at the SLAC National Accelerator Laboratory, corresponding to 467 ± 5 million B{bar B} pairs. We find the CP-violation parameter values and branching fractions S{sub?+?−} = -0.68 ± 0.10 ± 0.03, C{sub?+?−} = -0.25 ± 0.08 ± 0.02,?{sub K−?+} = -0.107 ± 0.016{sub -0.004}{sup +0.006}, C{sub?°?°} = -0.43 ± 0.26 ± 0.05,?(B° →?°?°) = (1.83 ± 0.21 ± 0.13) x 10−6,?(B° → K0?°) = (10.1 ± 0.6 ± 0.4) x 10−6, where in each case, the first uncertainties are statistical and the second are systematic. We observe CP violation with a significance of 6.7 standard deviations for B° →?+?− and 6.1 standard deviations for B° → K+{pi}{sup -}, including systematic uncertainties. Constraints on the Unitarity Triangle angle? are determined from the isospin relations among the B → {pi}{pi} rates and asymmetries. Considering only the solution preferred by the Standard Model, we find? to be in the range [71{sup o}, 109{sup o}] at the 68% confidence level.
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Total Pages | : 7 |
Release | : 2004 |
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Download Measurements of Branching Fractions and CP-Violating Asymmetries in B Meson Decays to Charmless Two-Body States Containing a K° Book in PDF, ePub and Kindle
The authors present measurements of branching fractions and CP-violating asymmetries in decays of B mesons to two-body final states containing a K°. The results are based on a data sample of approximately 88 million [Upsilon](4S) → B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC.
Author | : Jinwei Wu |
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Total Pages | : 208 |
Release | : 2005 |
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Download Study of Branching Fractions and CP-violating Asymmetries in B Meson Decays to Rho and Pion Final States with the BABAR Detector Book in PDF, ePub and Kindle
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Total Pages | : 5 |
Release | : 2001 |
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Download Measurement of Branching Fractions and Search for CP-violating Charge Asymmetries in Charmless Two-body B Decays Into Pions and Kaons Book in PDF, ePub and Kindle
We present measurements of the branching fractions and a search for CP-violating charge asymmetries in charmless hadronic decays of B mesons into two-body final states of kaons and pions. The results are based on a data sample of approximately 23 million BB(bar) pairs collected by the BABAR detector at the PEP-II asymmetric B Factory at SLAC.
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Release | : 2003 |
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Download MEASUREMENTS OF BRANCHING FRACTIONS AND CP VIOLATING ASYMMETRIES IN B0 ---] PI+ PI-, K+ PI-, K+ K- DECAYS. Book in PDF, ePub and Kindle
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 -])