A Search for the Rare Decay B[sup 0] to D[sub S][sup +] Rho[sup -]. PDF Download

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A Search for the Rare Decay B[sup 0] to D[sub S][sup +] Rho[sup -].

A Search for the Rare Decay B[sup 0] to D[sub S][sup +] Rho[sup -]. PDF Author:
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Languages : en
Pages :

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The authors report on a search for the decay B[sup 0] --> D[sub s][sup +][rho][sup -] in a sample of 90 x 10[sup 6] [Upsilon](4S) decays into B meson pairs collected between 1999 and 2001 with the BABAR detector at the PEP-II asymmetric-energy e[sup +]e[sup -] collider. No significant excess of signal events above the expected background is observed. The authors set a 90% C.L. limit on the branching fraction B(B[sup 0] --> D[sub s][sup +][rho][sup -]) 1.9 x 10[sup -5]. Assuming a flavor SU(3) symmetry relation between the decays B[sup 0] -- D[sub s][sup +][rho][sup -] and B[sup 0] --> D[sup +][rho][sup -], they set a limit on the ratio of CKM-suppressed to CKM-favored amplitudes r(D[rho])

A Search for the Rare Decay B[sup 0] to D[sub S][sup +] Rho[sup -].

A Search for the Rare Decay B[sup 0] to D[sub S][sup +] Rho[sup -]. PDF Author:
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ISBN:
Category :
Languages : en
Pages :

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Book Description
The authors report on a search for the decay B[sup 0] --> D[sub s][sup +][rho][sup -] in a sample of 90 x 10[sup 6] [Upsilon](4S) decays into B meson pairs collected between 1999 and 2001 with the BABAR detector at the PEP-II asymmetric-energy e[sup +]e[sup -] collider. No significant excess of signal events above the expected background is observed. The authors set a 90% C.L. limit on the branching fraction B(B[sup 0] --> D[sub s][sup +][rho][sup -]) 1.9 x 10[sup -5]. Assuming a flavor SU(3) symmetry relation between the decays B[sup 0] -- D[sub s][sup +][rho][sup -] and B[sup 0] --> D[sup +][rho][sup -], they set a limit on the ratio of CKM-suppressed to CKM-favored amplitudes r(D[rho])

A Search for the Rare Decay B° to D{sub S} Rho−

A Search for the Rare Decay B° to D{sub S} Rho− PDF Author:
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ISBN:
Category :
Languages : en
Pages : 5

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The authors report on a search for the decay B° --> D{sub s}?− in a sample of 90 x 106?(4S) decays into B meson pairs collected between 1999 and 2001 with the BABAR detector at the PEP-II asymmetric-energy e+e− collider. No significant excess of signal events above the expected background is observed. The authors set a 90% C.L. limit on the branching fraction B(B° --> D{sub s}+?−) 1.9 x 10−5. Assuming a flavor SU(3) symmetry relation between the decays B° -- D{sub s}+?− and B° --> D+?−, they set a limit on the ratio of CKM-suppressed to CKM-favored amplitudes r(D?)

Energy Research Abstracts

Energy Research Abstracts PDF Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 1550

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A Study of the Rare Decays B0 -]Ds(*)+pi- and B0 -] Ds(*)-K

A Study of the Rare Decays B0 -]Ds(*)+pi- and B0 -] Ds(*)-K PDF Author:
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Category :
Languages : en
Pages :

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The authors report on the evidence for the decays B[sup 0][yields] D[sub s][sup+][pi][sup -] and B[sup 0][yields] D[sub s][sup -] K[sup+] and the results of a search for the decays B[sup 0][yields] D*[sub s][sup+][pi][sup -] and B[sup 0][yields] D*[sub s][sup -] K[sup+] from a sample of 84 million[Upsilon](4S) decays into B meson pairs collected with the BaBar detector at the PEP II asymmetric-energy e[sup+]e[sup -] collider. The measured B[sup 0][yields] D[sub s][sup+][pi][sup -] yield has a probability of less than 10[sup -3] to be a fluctuation of the background and they measure the branching fraction[Beta](B[sup 0][yields] D[sub s][sup+][pi][sup -])= (3.2[+-] 0.9(stat.)[+-] 1.0 (syst.)) x 10[sup -5]. The measured B[sup 0][yields] D[sub s][sup -] K[sup+] yield has a probability of less than 5 x 10[sup -4] to be a fluctuation of the background and they measure the branching fraction[Beta](B[sup 0][yields] D[sub s][sup -] K[sup+])= (3.2[+-] 1.0(stat.)[+-] 1.0(syst.)) x 10[sup -5]. They also set 90% C.L. limits[Beta](B[sup 0][yields] D*[sub s][sup+][pi][sup -])

Drengen der blev Missionær

Drengen der blev Missionær PDF Author:
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ISBN:
Category :
Languages : en
Pages : 32

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Search for the Decay B^0 -] A^\pm_1 \rho^\mp

Search for the Decay B^0 -] A^\pm_1 \rho^\mp PDF Author: B. Aubert
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Category :
Languages : en
Pages :

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Book Description
The authors present a search for the rare B-meson decay B{sup 0} {yields} {alpha}{sub 1}{sup {+-}}{rho}{sup {-+}} with {alpha}{sub 1}{sup {+-}} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup {+-}}. We use (110 {+-} 1.2) x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEp-II asymmetric-energy B Factory at SLAC. They obtain an upper limit of 30 x 10{sup -6} (90% C.L.) for the branching fraction product {Beta}(B{sup 0} {yields} {alpha}{sub 1}{sup {+-}}{rho}{sup {-+}}) {Beta}({alpha}{sub 1}{sup {+-}} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup {+-}}), where they assume that the {alpha}{sub 1}{sup {+-}} decays exclusively to {rho}{sup 0}{pi}{sup {+-}}.

A Search for the Rare Decay $B\rightarrow\gamma\gamma$

A Search for the Rare Decay $B\rightarrow\gamma\gamma$ PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 13

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We report the result of a search for the rare decay B° 2![gamma][gamma] in 426 fb−1 of data, corresponding to 226 million B°{bar B}° pairs, collected on the [Upsilon](4S) resonance at the PEP-II asymmetric-energy ee− collider using the BABAR detector. We use a maximum likelihood fit to extract the signal yield and observe 2112{sup +13} signal events with a statistical signficance of 1.9 [sigma]. This corresponds to a branching fraction [Beta](B° 2![gamma][gamma]) = (1.7 ± 1.1(stat.) ± 0.2(syst.)) x 10−7. Based on this result, we set a 90% confidence level upper limit of [Beta](B° 2![gamma][gamma])

Search for the Rare Decay $B_s^0 \to \mu^+\mu^-$ at

Search for the Rare Decay $B_s^0 \to \mu^+\mu^-$ at PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 110

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The Search for the Rare Decay B to A0+pi0

The Search for the Rare Decay B to A0+pi0 PDF Author: W. Vazquez
Publisher:
ISBN:
Category :
Languages : en
Pages : 17

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Book Description
A search for the decay B{+-} {yields} a{sub 0}{sup {+-}}{pi}{sup 0} with the a{sub 0}{sup +} decaying to an {eta} and a {pi}{sup +} was carried out at the Stanford Linear Accelerator Center using the BABAR detector coupled with the PEP-II collider. The analysis used a data sample comprised of approximately 252 million B{bar B} pairs collected at the {Upsilon}(4S) resonance. No signal was observed and a 90% confidence level upper limit on the branching fraction was set at 1.32 x 10{sup -6}.

A Search for the Rare Decay K+ --> [pi]+vv̄

A Search for the Rare Decay K+ --> [pi]+vv̄ PDF Author: Daniel S Akerib
Publisher:
ISBN:
Category :
Languages : en
Pages : 254

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Book Description