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Rare B Decays in BABAR.

Rare B Decays in BABAR. PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5

Book Description
Measurements and searches for rare B decays have been performed with the BaBar detector at the PEP-II ee− asymmetric B Factory, operating at the [Upsilon](4S) resonance. The authors report some recent branching fraction measurements on hadronic and radiative B decays, occurring from b --> s/d and b --> u transitions. Most of the results presented here are based on a data sample corresponding to a luminosity of 81.9 fb−1.

Rare B Decays in BABAR.

Rare B Decays in BABAR. PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5

Book Description
Measurements and searches for rare B decays have been performed with the BaBar detector at the PEP-II ee− asymmetric B Factory, operating at the [Upsilon](4S) resonance. The authors report some recent branching fraction measurements on hadronic and radiative B decays, occurring from b --> s/d and b --> u transitions. Most of the results presented here are based on a data sample corresponding to a luminosity of 81.9 fb−1.

Rare B Decays with the BaBar Detector

Rare B Decays with the BaBar Detector PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

Book Description
The BABAR detector at SLAC's PEP-II storage ring collected a luminosity equivalent data of about 22 fb[sup -1] at the[Upsilon](4S) resonance during 1999 and 2000. Results on branching fractions of rare and charmless B$-meson decays and first fits for direct CP violation are presented.

Measurements of Rare B Decays at BABAR.

Measurements of Rare B Decays at BABAR. PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 28

Book Description
We present the results of searches for rare B meson decays. The measurements use all or part of a data sample of about 88 million [Upsilon](4S) → B{bar B} decays collected between 1999 and 2002 with the BABAR detector at the PEP-II asymmetric energy B Factory at the Stanford Linear Accelerator Center. We study a variety of decays dominated by electromagnetic, electroweak and gluonic penguin transitions, and report measurements of branching fractions.

Rare B Decays at BaBar

Rare B Decays at BaBar PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

Book Description
The authors present recent results on rare B meson decays based on data taken by the BABAR detector at the PEP-II asymmetric ee− collider. Included in this report are measurements of branching fractions and other quantities of interest for several hadronic, radiative, electroweak, and purely leptonic decays of B mesons.

BaBar

BaBar PDF Author: D. Hutchcroft
Publisher:
ISBN:
Category :
Languages : en
Pages : 4

Book Description
Three two body and two resonance decays of the B mesons have been measured using data from the BABAR detector: B{sup 0} {yields} {pi}{sup {+-}}, K{sup {-+}}, K{sup +}K{sup -}, K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} and B{sup 0} {yields} a{sub 1}{sup +}(1260){pi}{sup -}. The branching ratio and that of some intermediate resonances are presented along with the Cp asymmetry of the decay B{sup 0} {yields} K*{sup +}{pi}{sup -}.

Leptonic B Decays at BaBar

Leptonic B Decays at BaBar PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 4

Book Description
The authors present results on searches for the rare B decays B° → ll− (l = e or?) and B+ → K+?{bar?} in?(4S) decays. The data used in these analyses were collected with the BABAR detector at the PEP-II e+e− storage ring during the years 2000 and 2001. The B° → l+l− search was performed using an integrated luminosity of 54.4 fb−1 accumulated at the?(4S) resonance (about 60 million B{bar B} pairs) while the B+ → K+?{bar?} search was performed with 50.7 fb−1 (about 56 million B{bar B} pairs). Both analyses use an additional 6.4 fb−1 of data accumulated about 40 MeV below resonance. They see no evidence for a signal in either the B → l+l− or B → K+{nu}{bar {nu}} decay modes and set the following upper limits at the 90% CL:?(B° → e+e−)

The Search for Rare Non-hadronic B-meson Decays with Final-state Neutrinos Using the BaBar Detector

The Search for Rare Non-hadronic B-meson Decays with Final-state Neutrinos Using the BaBar Detector PDF Author: Dana Lindemann
Publisher:
ISBN:
Category :
Languages : en
Pages :

Book Description
"This thesis presents the searches for two rare B meson decays: the radiative leptonic decay B+ -> l+ nu gamma (l = e, mu) and the flavor-changing neutral current B -> K(*) nu nubar. These searches use the full dataset collected by the BaBar experiment, which corresponds to almost 500 million BB pairs. After fully reconstructing the hadronic decay of one of the B mesons in Upsilon(4S) -> BB decays, evidence of B+ -> l+ nu gamma or B -> K(*) nu nubar is looked for in the rest of the event. No significant evidence of either signal decay is observed. Model-independent branching-fraction upper limits are set at BR(B ->e nu gamma)17 x10 {-6}, BR(B -mu nu gamma)24 x10 {-6}, and BR(B -l nu gamma)15.6 x10 {-6}, all at the 90% confidence level. These are currently the most stringent published upper limits for B+ - l+ nu gamma. In addition, branching-fraction upper limits are set at BR(B -> K+ nu nubar)3.7 x10 {-5}, BR(B - K0 nu nubar)8.0 x10 {-5}, BR(B - K*+ nu nubar)11.5 x10 {-5}, and BR(B - K*0 nu nubar)9.2 x10 {-5}, all at the 90% confidence level. For additional sensitivity to New Physics contributions, partial B - K(*) nu nubar branching-fraction upper limits are also determined over the full kinematic range." --

Charmless Hadronic B Decays at BaBar

Charmless Hadronic B Decays at BaBar PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5

Book Description
We present preliminary results of several searches for rare charmless hadronic decays of the B meson using data collected by the BABAR detector at the Stanford Linear Accelerator Center's PEP-II storage ring. We search for the decays hh−, h+h−h+, h+h−?°, X°h+, and X°K{sub S}°, where h =? or K, and X° =?' or?. In a sample of 8.8 million B{bar B} decays they measure the branching fractions. They calculate upper limits for the modes without a significant signal.

Radiative Penguin and Leptonic Rare Decays at BABAR.

Radiative Penguin and Leptonic Rare Decays at BABAR. PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

Book Description
Recent BABAR results on rare B decays involving flavour-changing neutral currents or purely leptonic final states are presented. New measurements of the CP asymmetries in B [yields] K*[gamma], B [yields] K*[sub 2](1430)[gamma], and b [yields] s[gamma] are reported, as well as a new measurement of the B [yields] K*[gamma] branching fraction. Also reported are updated limits on B [yields] [mu][nu] and recent measurements of B [yields] K(*)[ell][ell] and b [yields] s[ell][ell]. The data sample comprises 123 [center-dot] 10[sup 6] [Upsilon](4S) [yields] B[bar B] decays collected with the BABAR detector at the PEP-II e[sup +]e[sup -] storage ring.

Search for the Rare Decays $B^0\to D_s^{(*)+} A_{0(2)}^-$

Search for the Rare Decays $B^0\to D_s^{(*)+} A_{0(2)}^-$ PDF Author: J. C. Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 8

Book Description
The authors have searched for the decays B{sup 0} {yields} D{sub s}{sup +}a{sub 0}{sup -}, B{sup 0} {yields} D*{sub s}{sup +} a{sub 0}{sup -}, B{sup 0} {yields} D{sub s}{sup +}a{sub 2}{sup -} and B{sup 0} {yields} D*{sub s}{sup +} a{sub 2}{sup -} in a sample of about 230 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. They find no evidence for these decays and set upper limits at 90% C.L. on the branching fractions: {Beta}(B{sup 0} {yields} D{sub s}{sup +} a{sub 0}{sup -})
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