Semileptonic Form-factors from B to K*[gamma] Decays in the Large Energy Limit PDF Download
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![Semileptonic Form-factors from B to K*[gamma] Decays in the Large Energy Limit PDF](https://books.google.com/books/content/images/frontcover/1625AQAACAAJ?fife=w150-h200)
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Languages : en
Pages : 5
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Making use of the measurement of the B 2!K*[gamma] branching ratio together with the relations following from the limit of high recoil energy, we obtain stringent constraints on the values of the form-factors entering in heavy-to-light B 2!Vll' processes such as B 2!K*ll−, B 2!K*[nu]{bar [nu]} and B 2![rho]l{nu} decays. They show that the symmetry predictions, when combined with the experimental information on radiative decays, specify a severely restricted set of values for the vector and axial-vector form-factors evaluated at zero momentum transfer, q2 = 0. These constraints can be used to test model calculations and to improve our understanding of the q2-dependence of semileptonic form-factors. We stress that the constraints remain stringent even when corrections are taken into account.
![Semileptonic Form-factors from B to K*[gamma] Decays in the Large Energy Limit PDF](https://books.google.com/books/content/images/frontcover/1625AQAACAAJ?fife=w80-h100)
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Languages : en
Pages : 5
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Book Description
Making use of the measurement of the B 2!K*[gamma] branching ratio together with the relations following from the limit of high recoil energy, we obtain stringent constraints on the values of the form-factors entering in heavy-to-light B 2!Vll' processes such as B 2!K*ll−, B 2!K*[nu]{bar [nu]} and B 2![rho]l{nu} decays. They show that the symmetry predictions, when combined with the experimental information on radiative decays, specify a severely restricted set of values for the vector and axial-vector form-factors evaluated at zero momentum transfer, q2 = 0. These constraints can be used to test model calculations and to improve our understanding of the q2-dependence of semileptonic form-factors. We stress that the constraints remain stringent even when corrections are taken into account.
![Semileptonic Form-factors from B-] K* Gamma Decays in the Large Energy Limit PDF](https://books.google.com/books/content/images/frontcover/ZYBvnQAACAAJ?fife=w80-h100)
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Languages : en
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Making use of the measurement of the $B\to K^*\gamma$ branching ratio together with the relations following from the limit of high recoil energy, we obtain stringent constraints on the values of the form-factors entering in heavy-to-light $B\to V\ell\ell'$ processes such as $B\to K^*\ell^+\ell^-$, $B\to K^*\nu \bar\nu$ and $B\to \rho\ell\nu$ decays. We show that the symmetry predictions, when combined with the experimental information on radiative decays, specify a severely restricted set of values for the vector and axial-vector form-factors evaluated at zero momentum transfer, $q^2=0$. These constraints can be used to test model calculations and to improve our understanding of the $q^2$-dependence of semileptonic form-factors. We stress that the constraints remain stringent even when corrections are taken into account.
Author: S. Aoki
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Category :
Languages : en
Pages : 3
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![Measurement of B -] D Form Factors in the Semileptonic Decay B -] D* L Nu at BaBar PDF](https://books.google.com/books/content/images/frontcover/kSm8wQEACAAJ?fife=w80-h100)
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Languages : en
Pages : 343
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We present here the results of a measurement of the three semileptonic form factors involved in the decay B° → D*l?, where l is one of the two light charged leptons (i.e. an electron or muon--though the final results in this work are determined only for l = electron). This measurement uses the Babar 2000-2002 data set, which is altogether approximately 85 x 106 B{bar B}-pairs in 78 fb−1 of integrated luminosity. The D* was reconstructed in the channel D*+ → D°?+, and the D° in the channel D° → K−?+. This analysis was based ultimately on ≈ 16,386 reconstructed events with an estimated background contamination of ≈ 15%. The method of the measurement was to perform a unbinned maximum likelihood fit in the four kinematic variables that describe the decay for the three form factor parameters R1, R2, and?2. The results obtained for the form factor ratios are R1 = 1.328 ± 0.055 ± 0.025 ± 0.025 and R2 = 0.920 ± 0.044 ± 0.020 ± 0.013 for the ratios and?2 = 0.769 ± 0.039 ± 0.019 ± 0.032 for the form factor slope. The errors given are statistical, Monte Carlo statistical and systematic respectively.
Author: Catherine Vander Velde
Publisher: World Scientific
ISBN: 9814547700
Category :
Languages : en
Pages : 1042
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Category :
Languages : en
Pages :
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Category : Aeronautics
Languages : en
Pages : 704
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Author: E Gava
Publisher: World Scientific
ISBN: 9814554723
Category :
Languages : en
Pages : 1076
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Category :
Languages : en
Pages : 7
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Author:
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Category : Power resources
Languages : en
Pages : 782
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