Measurement Of The Bar B Yields D Ell Bar Nu Anti Neutrino Partial Width And Form Factor Parameters

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Measurement Of The Bar B Yields D Ell Bar Nu Anti Neutrino Partial Width And Form Factor Parameters

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Author :
language : en
Publisher:
Release Date : 2003

Measurement Of The Bar B Yields D Ell Bar Nu Anti Neutrino Partial Width And Form Factor Parameters written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.

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 Bar B 2 Dl Bar Nu Anti Neutrino Partial Width And Form Factor Parameters

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language : en
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Release Date : 2003

Measurement Of The Bar B 2 Dl Bar Nu Anti Neutrino Partial Width And Form Factor Parameters written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.

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 Form Factors For Anti B0 D Lepton Anti Neutrino

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language : en
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Release Date : 2003

Measurement Of The Form Factors For Anti B0 D Lepton Anti Neutrino written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.

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.

The Bbar D L Nu Bar Form Factor At Zero Recoil And The Determination Of Verticalv Sub Cb Vertical

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language : en
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Release Date : 2002

The Bbar D L Nu Bar Form Factor At Zero Recoil And The Determination Of Verticalv Sub Cb Vertical written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.

We summarize our lattice QCD study of the form factor at zero recoil in the decay[bar B][yields] D*[ell][bar[nu]]. After careful consideration of all sources of systematic uncertainty, we find, h[sub A[sub 1]](1)= 0.913[sub -17-30][sup+24+17], where the first uncertainty is from statistics and fitting while the second combined uncertainty is from all other systematic effects.

Measurement Of The B0 To Pi L Nu Form Factor Shape And Branching Fraction And Determination Of

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language : en
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Release Date : 2006

Measurement Of The B0 To Pi L Nu Form Factor Shape And Branching Fraction And Determination Of written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

We report the results of a study of the exclusive charmless semileptonic decay, B° →?−l?, undertaken with approximately 227 million B{bar B} pairs collected at the?(4S) resonance with the BABAR detector. The analysis uses events in which the signal B decays are reconstructed with an innovative loose neutrino reconstruction technique. We obtain partial branching fractions in 12 bins of q2, the momentum transfer squared, from which we extract the f+(q2) form-factor shape and the total branching fraction?(B° →?−l+?) = (1.46 ± 0.07{sub stat} ± 0.08{sub syst}) x 10−4. Based on a recent unquenched lattice QCD calculation of the form factor in the range q2> 16 GeV2, we find the magnitude of the CKM matrix element.

Measurement Of The B0 To Pi L Nu Form Factor Shape And Branching Fraction And Determination Of

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Author :
language : en
Publisher:
Release Date : 2006

Measurement Of The B0 To Pi L Nu Form Factor Shape And Branching Fraction And Determination Of written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

The authors report the results of a study of the exclusive charmless semileptonic B° →?−l? decay undertaken with approximately 227 million B{bar B} pairs collected at the?(4S) resonance with the BABAR detector. The analysis uses events in which the signal B mesons are reconstructed with a novel loose neutrino reconstruction technique. We obtain partial branching fractions in 12 bins of q2, the l+? invariant mass squared, from which we extract the f+(q2) form factor shape and the total branching fraction:?(B° →?−l+?) = 1.44 ± 0.08{sub stat} ± 0.10{sub syst} x 10−4. Based on a recent theoretical calculation of the form factor, we find the magnitude of the CKM matrix element.

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language : en
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Release Date : 1998

written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Drinking water categories.

Measurement Of The Branching Fractions Of Bbar D L Nubar L Decays In Events Tagged By A Fully Reconstructed B Meson

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language : en
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Release Date : 2008

Measurement Of The Branching Fractions Of Bbar D L Nubar L Decays In Events Tagged By A Fully Reconstructed B Meson written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.

We report a measurement of the branching fractions of {bar B} 2!D** l−{bar {nu}}{sub l} decays based on 417 fb−1 of data collected at the [Upsilon](4S) resonance with the BABAR detector at the PEP-II ee− storage rings. Events are selected by fully reconstructing one of the B mesons in a hadronic decay mode. A fit to the invariant mass differences m(D{sup (*)})-m(D{sup (*)}) is performed to extract the signal yields of the different D** states. We observe the {bar B} 2!D**{ell}−{bar {nu}}{sub {ell}} decay modes corresponding to the four D** states predicted by Heavy Quark Symmetry with a significance greater than six standard deviations including systematic uncertainties.

The Bbar D L Nu Bar Form Factor At Zero Recoil And The Determination Of

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Author :
language : en
Publisher:
Release Date : 2001

The Bbar D L Nu Bar Form Factor At Zero Recoil And The Determination Of written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.

We summarize our lattice QCD study of the form factor at zero recoil in the decay {bar B} 2!D*l{bar {nu}}. After careful consideration of all sources of systematic uncertainty, we find, h{sub A1}(1) = 0.913{sub 1}--30{sup +24+17}, where the first uncertainty is from statistics and fitting while the second combined uncertainty is from all other systematic effects.

Relaci N De La Jornada Que Hizo El Condestable De Castilla Don Juan Fern Ndez De Velasco Desde Valadolid A Inglaterra Con Embajada De S M Felipe Iii 1603

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Author :
language : en
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Release Date : 1603

Relaci N De La Jornada Que Hizo El Condestable De Castilla Don Juan Fern Ndez De Velasco Desde Valadolid A Inglaterra Con Embajada De S M Felipe Iii 1603 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1603 with categories.