Measurement Of The Branching Fractions For Inclusive B And Bar B Decays To Flavor Tagged D Dsub S And Lambdasub C PDF Download
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| Release | : 2004 |
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Download MEASUREMENT OF THE BRANCHING FRACTIONS FOR INCLUSIVE B[sup -] AND [bar B][sup 0] DECAYS TO FLAVOR-TAGGED D, D[sub S] AND LAMBDA[sub C]. Book in PDF, ePub and Kindle
The authors report on the inclusive branching fractions of B[sup -] and of [bar B][sup 0] mesons decaying to D[sup 0]X, [bar D][sup 0]X, D[sup +]X, D[sup -]X, D[sub s][sup +]X, D[sub s][sup -]X, [Lambda][sub c][sup +]X, [bar [Lambda]][sub c][sup -]X, based on a sample of 88.9 million B[bar B] events recorded with the BABAR detector at the [Upsilon](4S) resonance. Events are selected by completely reconstructing one B and searching for a reconstructed charmed particle in the rest of the event. The authors measure the number of charmed and of anit-charmed particles per B decay and derive the total charm yield per B[sup -] decay, n[sub c][sup -] = 1.313 [+-] 0.037 [+-] 0.037 [+-] 0.062[sub -0.043][sup +0.063], and per [bar B][sup 0] decay, n[sub c][sup 0] = 1.276 [+-] 0.062 [+-] 0.058[sub -0.046][sup +0.066] where the first uncertainty is statistical, the second is systematic, and the third reflects the charm branching-fraction uncertainties.
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| Total Pages | : 5 |
| Release | : 2004 |
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Download MEASUREMENT OF THE BRANCHING FRACTIONS FOR INCLUSIVE B− AND {bar B}° DECAYS TO FLAVOR-TAGGED D, D{sub S} AND LAMBDA{sub C} Book in PDF, ePub and Kindle
The authors report on the inclusive branching fractions of B− and of {bar B}° mesons decaying to D°X, {bar D}°X, DX, D−X, D{sub s}+X, D{sub s}−X,?{sub c}+X, {bar {Lambda}}{sub c}−X, based on a sample of 88.9 million B{bar B} events recorded with the BABAR detector at the?(4S) resonance. Events are selected by completely reconstructing one B and searching for a reconstructed charmed particle in the rest of the event. The authors measure the number of charmed and of anit-charmed particles per B decay and derive the total charm yield per B− decay, n{sub c}− = 1.313 ± 0.037 ± 0.037 ± 0.062{sub -0.043}{sup +0.063}, and per {bar B}° decay, n{sub c}° = 1.276 ± 0.062 ± 0.058{sub -0.046}{sup +0.066} where the first uncertainty is statistical, the second is systematic, and the third reflects the charm branching-fraction uncertainties.
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| Release | : 2003 |
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Download FLAVOR-Specific Inclusive B Decays to Charm Book in PDF, ePub and Kindle
We have measured the branching fractions for B[yields][bar D]X, B[yields] DX, and B[yields][bar D]X[ell][sup+][nu], where ''B'' is an average over B[sup 0] and B[sup+], ''D'' is a sum over D[sup 0] and D[sup+], and ''[bar D]'' is a sum over[bar D][sup 0] and D[sup -]. From these results and some previously measured branching fractions, we obtain[Beta](b[yields] c[bar c]s)= (21.9[+-] 3.7)%, [Beta](b[yields] sg)
| Author | : B. Aubert |
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| Release | : 2006 |
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Download Study of Inclusive $B^-$ and $\bar{B}^0$ Decays ToFlavor-Tagged $D$, $D_s$ and $\Lambda_c$ Book in PDF, ePub and Kindle
We report on a study of inclusive B{sup -} and {bar B}{sup 0} meson decays to D{sup 0}X, {bar D}{sup 0}X, D{sup +}X, D{sup -}X, D{sub s}{sup +}X, D{sub s}{sup -}X, {Lambda}{sub c}{sup +}X, {bar {Lambda}}{sub c}{sup -}X, based on a sample of 231 million B{bar B} events recorded with the BABAR detector at the {Upsilon}(4S) resonance. Events are selected by completely reconstructing one B and searching for a reconstructed charm particle in the rest of the event. From the measured branching fractions of these decays, we infer the number of charm and anti-charm particles per {bar B} decay, separately for charged and neutral parents. We derive the total charm yield per B{sup -} decay, n{sub c}{sup -} = 1.202 {+-} 0.023 {+-} 0.040{sub -0.029}{sup +0.035}, and per {bar B}{sup 0} decay, n = 1.193 {+-} 0.030 {+-} 0.034{sub -0.035}{sup +0.044} where the first uncertainty is statistical, the second is systematic, and the third reflects the charm branching-fraction uncertainties. We also present the charm momentum distributions measured in the {bar B} rest frame.
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| Total Pages | : 18 |
| Release | : 2003 |
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Download Measurement of the Branching Fractions for the Exclusive Decays of B0 and B+ to Dbar(*)D(*)K. Book in PDF, ePub and Kindle
The authors report the observation of 823 ± 57 B° and 970 ± 65 B decays to doubly charmed final states {bar D}{sup (*)} D{sup (*)}K, where {bar D}{sup (*)} and D{sup (*)} are fully reconstructed and K is either a K{sup ±} or a K°. They use a sample of 82.3 ± 0.9 million B{bar B} events collected between 1999 and 2002 with the BABAR detector at the PEP-II storage ring at the Stanford Linear Accelerator Center. The 22 possible B decays to {bar D}{sup (*)} D{sup (*)}K are reconstructed exclusively and the corresponding branching fractions or limits are determined. The branching fractions of the B° and of the B to {bar D}{sup (*)} D{sup (*)}K are found to be [Beta](B° 2!{bar D}{sup (*)}D{sup (*)}K) = (4.3 ± 0.3(stat) ± 0.6(sys))%, [Beta](B+ 2!{bar D}{sup (*)} D{sup (*)}K) = (3.5 ± 0.3(stat) {+-} 0.5(syst))%.
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Download Measurement of the Branching Fraction for B- --] D0 K*- Book in PDF, ePub and Kindle
The authors present a measurement of the branching fraction for the decay B[sup -] [yields] D[sup 0]K*[sup -] using a sample of approximately 86 million B[bar B] pairs collected by the BABAR detector from e[sup +]e[sup -] collisions near the [Upsilon](4S) resonance. The D[sup 0] is detected through its decays to K[sup -] [pi][sup +], K[sup -][pi][sup +][pi][sup 0] and K[sup -] [pi][sup +][pi][sup -][pi][sup +], and the K*[sup -] through its decay to K[sub S][sup 0] [pi][sup -]. They measure the branching fraction to be [Beta](B[sup -] [yields] D[sup 0]K*[sup -]) = (6.3 [+-] 0.7(stat.) [+-] 0.5(syst.)) x 10[sup -4].
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Download Recueil factice d'articles de presse concernant Henriette Berthias Book in PDF, ePub and Kindle
| Author | : Clare Louise Brown |
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| Total Pages | : 0 |
| Release | : 2005 |
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Download An Inclusive Measurement of the Branching Fraction for the B{u2192}s? Using the Recoil of Fully Reconstructed B Meson Decays Book in PDF, ePub and Kindle
| Author | : B. Aubert |
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| Total Pages | : 20 |
| Release | : 2006 |
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Download Measurement of the Relative Branching Fractions for B^- to D/D^{*}/D^{**}(D^{(*)}\pi) \ell^- \bar{\nu}_{\ell} with a Large Sample of Tagged B Mesons Book in PDF, ePub and Kindle
We present a study of B semileptonic decays into charm final states based on 211.7 fb{sup -1} of data collected at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II e{sup +}e{sup -} storage ring. Using a novel technique based on the simultaneous fit of a set of variables reconstructed on the recoil of a B tagged in an hadronic decay mode, we measure the relative branching fractions {Lambda}(B{sup -} {yields} D{sup 0}{ell}{sup -}{bar {nu}}{sub {ell}}) = 0.611 {+-} 0.022 (stat.) {+-} 0.027 (syst.) and {Lambda}(B{sup -} {yields} D**{sup 0})(D{sup (*)}{pi}){ell}{sup -}{bar {nu}}{sub {ell}}/{Lambda}(B{sup -} {yields} DX{ell}{sup -}{bar {nu}}{sub {ell}}) = 0.173 {+-} 0.017 (stat.) {+-} 0.021 (syst.).
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| Total Pages | : 7 |
| Release | : 2008 |
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Download Measurement of the Branching Fractions of Bbar -] D** L^- Nubar_l Decays in Events Tagged by a Fully Reconstructed B Meson Book in PDF, ePub and Kindle
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.
