Evidence for B- to Rho0rho0 Decay and Implications for the CKM Angle Alpha PDF Download
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Languages : en
Pages : 7
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Book Description
The authors search for the decays B° 2![rho]°[rho]°, B° 2![rho]° f0(980), and B° 2!f0(980) f0(980) in a sample of about 384 million [Upsilon](4S) 2!B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy ee− collider at SLAC. They find evidence for B° 2![rho]°[rho]° with 3.5[sigma] significance and measure the branching fraction [Beta] = (1.07 ± 0.33 ± 0.19) x 10−6 and longitudinal polarization fraction f{sub L} = 0.87 ± 0.13 ± 0.04, where the first uncertainty is statistical, and the second is systematic. The uncertainty on the CKM unitarity angle [alpha] due to penguin contributions in B 2![rho][rho] decays is 18{sup o} at the 1[sigma] level. They also set upper limits on the B° 2![rho]° f0(980) and B° 2!f0(980)f0(980) decay rates.
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Languages : en
Pages : 7
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Book Description
The authors search for the decays B° 2![rho]°[rho]°, B° 2![rho]° f0(980), and B° 2!f0(980) f0(980) in a sample of about 384 million [Upsilon](4S) 2!B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy ee− collider at SLAC. They find evidence for B° 2![rho]°[rho]° with 3.5[sigma] significance and measure the branching fraction [Beta] = (1.07 ± 0.33 ± 0.19) x 10−6 and longitudinal polarization fraction f{sub L} = 0.87 ± 0.13 ± 0.04, where the first uncertainty is statistical, and the second is systematic. The uncertainty on the CKM unitarity angle [alpha] due to penguin contributions in B 2![rho][rho] decays is 18{sup o} at the 1[sigma] level. They also set upper limits on the B° 2![rho]° f0(980) and B° 2!f0(980)f0(980) decay rates.
![Measurement of the Branching Fraction, Polarization, and CP Asymmetries in B0-]rho0rho0 Decay, and Implications for the CKM Angle Alpha PDF](https://books.google.com/books/content/images/frontcover/yqldAQAACAAJ?fife=w80-h100)
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Languages : en
Pages : 7
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Book Description
We study B° 2![rho]°[rho]° decays in a sample of 465 x 106 [Upsilon](4S) 2!B{bar B} events collected with the BABAR detector at the PEP-II asymmetric-energy ee− collider located at the Stanford Linear Accelerator Center (SLAC). We measure the branching fraction [Beta] = (0.92 ± 0.32 ± 0.14) x 10−6 and longitudinal polarization fraction f{sub L} = 0.75{sub -0.14}{sup +0.11} ± 0.04, where the first uncertainty is statistical and the second is systematic. The evidence for the B° 2![rho]°[rho]° signal has a significance of 3.1 standard deviations, including systematic uncertainties. We investigate the proper-time dependence of the longitudinal component in the decay and measure the CP-violating coefficients S{sub L}°° = (0.3 ± 0.7 ± 0.2) and C{sub L}°° = (0.2 ± 0.8 ± 0.3). They study the implication of these results for the unitarity triangle angle [alpha].
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Languages : en
Pages :
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Book Description
The authors search for the decay B° 2![rho]°[rho]° in a data sample of about 227 million [Upsilon](4S) 2!B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy ee− collider at SLAC. They find no significant signal and set an upper limit of 1.1 x 10−6 at 90% CL on the branching fraction. As a result, the uncertainty due to penguin contributions on the CKM unitarity angle [alpha] measured in B 2![rho][rho] decays is 11{sup o} at 68% CL.
Author: H. Li
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Languages : en
Pages :
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Using a data sample of 122 million {Upsilon}(4S) {yields} B{bar B} decays collected with BABAR detector at the PEP-II asymmetric B factory at SLAC, we measure the time-dependent-asymmetry parameters of the longitudinally polarized component in the B{sup 0} {yields} {rho}{sup +}{rho}{sup -} decay as C{sub L} = -0.23 {+-} 0.24(stat) {+-} 0.14(syst) and S{sub L} = -0.19 {+-} 0.33(stat) {+-} 0.11(syst). The B{sup 0} {yields} {rho}{sup 0}{rho}{sup 0} decay mode is also searched for in a data sample of about 227 million B{bar B} pairs. No significant signal is observed, and an upper limit of 1.1 x 10{sup -6} (90% C.L.) on the branching fraction is set. The penguin contribution to the CKM angle {alpha} uncertainty is measured to be 11{sup o}. All results are preliminary.
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Languages : en
Pages :
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![Study of the Decay B0 (anti-B0) -]rho+rho- and Constraints on the CKM Angle Alpha PDF](https://books.google.com/books/content/images/frontcover/kiLmjwEACAAJ?fife=w80-h100)
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Languages : en
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Book Description
Using a data sample of 89 million [Upsilon](4S) [yields] B[bar B] decays collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC, the authors measure the B[sup 0]([bar B][sup 0]) [yields] [rho][sup +][rho][sup -] branching fraction as (30 [+-] 4(stat) [+-] 5(syst)) x 10[sup -6] and a longitudinal polarization fraction of f[sub L] = 0.99 [+-] 0.03(stat)[sub -0.03][sup +0.04](syst). They measure the time-dependent-asymmetry parameters of the longitudinally polarized component of this decay as C[sub L] = -0.17 [+-] 0.27(stat) [+-] 0.14(syst) and S[sub L] = -0.42(stat) [+-] 0.14(syst). They present constraints on the CKM angle [alpha].
Author: Attila Mihalyi
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Category :
Languages : en
Pages : 198
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Book Description
Author: George A. Boyne
Publisher: Cambridge University Press
ISBN: 1139460455
Category : Business & Economics
Languages : en
Pages : 312
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Book Description
The performance of governments around the globe is constantly in the spotlight, whether as a celebration or indictment of their activities. Providing evidence on strategies to improve the performance of public agencies is therefore essential to the practice of public management. Originally published in 2006, this important contribution to the debate explores issues of measurement, research methodology, and management influences on performance. It focuses on three key questions: what approaches should be adopted to measure the performance of public agencies? What aspects of management influence the performance of public agencies? As the world globalizes, what are the key international issues in performance measurement and management? In examining these questions, the contributors debate both methodological and technical issues regarding the measurement of performance in public organizations, and provide empirical analyses of the determinants of performance. The book concludes with groundbreaking work on the international dimensions of these issues.
Author: Richard M. Walker
Publisher: Cambridge University Press
ISBN: 9781107411678
Category : Business & Economics
Languages : en
Pages : 0
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Book Description
Public services touch the majority of people in advanced and developing economies on a daily basis: children require schooling, the elderly need personal care and assistance, rubbish needs collecting, water must be safe to drink and the streets need policing. In short, there is practically no area of our lives that isn't touched in some way by public services. As such, knowledge about strategies to improve their performance is central to the good of society. In this book, a group of leading scholars examine some of the most pressing issues in public administration, political science and public policy by undertaking a systematic review of the research literature on public management and the performance of public agencies. It is an important resource for public management researchers, policy-makers and practitioners who wish to understand the current state of the field and the challenges that lie ahead.
Author: Gary J. Miller
Publisher: Cambridge University Press
ISBN: 9780521457699
Category : Business & Economics
Languages : en
Pages : 276
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Book Description
Managerial Dilemmas extends the use of analytical techniques from organisational economics to the spheres of organisational culture and leadership in politics and business.
