Measurement of the {bar B} 2!Dl{bar {nu}} Anti-Neutrino Partial Width and Form Factor Parameters PDF Download
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Languages : en
Pages : 11
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We have studied the decay {bar B} → Dl{bar {nu}}, where l = e or [mu]. From a fit to the differential decay rate d[Lambda]/dw we measure the rate normalization F{sub D}(1).
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 11
Get Book Here
Book Description
We have studied the decay {bar B} → Dl{bar {nu}}, where l = e or [mu]. From a fit to the differential decay rate d[Lambda]/dw we measure the rate normalization F{sub D}(1).
![Measurement of The[bar B][yields] D[ell][bar[nu] Anti-Neutrino Partial Width and Form Factor Parameters PDF](https://books.google.com/books/content/images/frontcover/E8jTjwEACAAJ?fife=w80-h100)
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Languages : en
Pages :
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Book Description
We have studied the decay[bar B][yields] D[ell][bar[nu]], where[ell]= e or[mu]. From a fit to the differential decay rate d[Lambda]/dw we measure the rate normalization F[sub D](1)V[sub cb] and form factor slope[rho][sub D][sup 2], and, using measured values of[tau][sub B], find[Lambda]([bar B][yields] D[ell][bar[nu]])= (12.0[+-] 0.9[+-] 2.1) ns[sup -1]. The resulting branching fractions are[Beta]([bar B][sup 0][yields] D[sup+][ell][sup -][bar[nu]])= (1.87[+-] 0.15[+-] 0.32)% and[Beta](B[sup -][yields] D[sup 0][ell][sup -][bar[nu]])= (1.94[+-] 0.15[+-] 0.34)%. The form factor parameters are in agreement with those measured in[bar B][yields] D*[ell][bar[nu]] decays, as predicted by heavy quark effective theory.
![Measurement of the Form-Factors for Anti-B0 -] D*+ Lepton- Anti-Neutrino PDF](https://books.google.com/books/content/images/frontcover/4kfLjwEACAAJ?fife=w80-h100)
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Using a sample of 2.6 x 10[sup 67][Upsilon](4S)[yields] B[bar B] events collected with the CLEO II detector at the Cornell Electron Storage Ring, we have measured the form factors for[bar B][sup 0][yields] D*[sup+][ell][sup -][bar[nu]]. We perform a three-parameter fit to the joint distribution of four kinematic variables to obtain the form factor ratios R[sub 1]= 1.18[+-] 0.30[+-] 0.12 and R[sub 2]= 0.71[+-] 0.22[+-] 0.07; and the form-factor slope[rho][sub A[sub 1]][sup 2]= 0.91[+-] 0.15[+-] 0.06, which is closely related to the slope of the Isgur-Wise function. The form factor ratios are consistent with predicted corrections to the heavy-quark symmetry limit of R[sub 1]= R[sub 2]= 1.
