Measurement Of The B0 To Pi L Nu And B To Pi0 L Nu Branching Fractions And Determination Of

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Measurement Of The B0 To Pi L Nu And B To Pi0 L Nu Branching Fractions And Determination Of

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Author :
language : en
Publisher:
Release Date : 2005

Measurement Of The B0 To Pi L Nu And B To Pi0 L Nu Branching Fractions 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 2005 with categories.

The authors report preliminary measurements of the charmless exclusive semileptonic branching fractions of the B° → ?−l+? and B+ → ?°l+? decays, based on 211 fb−1 of data collected at the ?(4S) resonance by the BABAR detector. In events in which the decay of one B meson to a hadronic final state is fully reconstructed, the semileptonic decay of the second B meson is identified by the detection of a charged lepton and a pion. They measure the partial branching fractions for B° → ?−l+? and B+ → ?°l+? in three regions of the invariant mass squared of the lepton pair, and they obtain the total branching fractions ?(B° → ?−l+?) = (1.14 ± 0.27{sub stat} ± 0.17{sub syst}) x 10−4 and ?(B+ → ?°l+?) = (0.86 ± 0.22{sub stat} ± 0.11{sub syst}) x 10−4. Using isospin symmetry, they measure the combined total branching fraction ?(B° → ?−l+?) = (1.28 ± 0.23{sub stat} ± 0.16{sub syst}) x 10−4. Theoretical predictions of the form-factor are used to determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element.

Physics Is Fun Memoirs Of A Life In Physics

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Author : Richard Wilson
language : en
Publisher: Richard Wilson
Release Date : 2011

Physics Is Fun Memoirs Of A Life In Physics written by Richard Wilson and has been published by Richard Wilson this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Physicists categories.

High Energy Physics Index

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Author :
language : en
Publisher:
Release Date : 1987

High Energy Physics Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Nuclear physics categories.

Science Citation Index

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Author :
language : en
Publisher:
Release Date : 1992

Science Citation Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Science categories.

Vols. for 1964- have guides and journal lists.

B0 K Pi Pi0 Dalitz Plot Analysis

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Author :
language : en
Publisher:
Release Date : 2004

B0 K Pi Pi0 Dalitz Plot Analysis written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.

The authors present preliminary results on the Dalitz plot analysis of B[sup 0] --> K[sup +][pi][sup -][pi][sup 0] decays. The data sample comprises 213 million [Upsilon](4S) --> B[bar B] decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. They report measurements of the inclusive branching fraction, quasi-two-body fractions and CP-violating charge asymmetries for intermediate states including K*(892)[sup +][pi][sup -] and [rho](770)[sup -]K[sup +]. Observations of B[sup 0] decays to the K[pi]S-wave intermediate states, K[sub 0]*(1430)[sup +][pi][sup -] and K[sub 0]*(1430)[sup 0][pi][sup 0], are reported. Evidence of the decay B[sup 0] --> K*(892)[sup 0][pi][sup 0] is seen. They set upper limits at 90% confidence level on branching fractions of the nonresonant and other less significant intermediate states.

Measurement Of The B Rho Pi0 Branching Fraction And Direct Cp Asymmetry

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Author : J. C. Chen
language : en
Publisher:
Release Date : 2005

Measurement Of The B Rho Pi0 Branching Fraction And Direct Cp Asymmetry written by J. C. Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

An improved measurement of the process B{sup {+-}} {yields} {rho}{sup {+-}}{pi}{sup 0} is presented. The data sample of 211 fb{sup -1} comprises 232 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. The yield and CP asymmetry are calculated using an extended maximum likelihood fitting method. The branching fraction and asymmetry are found to be {Beta}(B{sup {+-}} {yields} {rho}{sup {+-}}{pi}{sup 0}) = [10.0 {+-} 1.4 (Stat.) {+-} 0.9 (Syst.)] x 10{sup -6} and {Alpha}{sub CP}(B{sup {+-}} {yields} {rho}{sup {+-}}{pi}{sup 0}) = -0.01 {+-} 0.13 (Stat.) {+-} 0.02 (Syst.), superseding previous measurements. The statistical significance of the signal is calculated to be 8.7{sigma}.

Measurement Of The B To Rho Pi0 Branching Fraction And Direct Cp Asymmetry

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Author :
language : en
Publisher:
Release Date : 2007

Measurement Of The B To Rho Pi0 Branching Fraction And Direct Cp Asymmetry written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.

The authors present improved measurements of the branching fraction and CP asymmetry for the process B{sup ±} → [rho]{sup ±}[pi]°. The data sample corresponding to 211 fb−1 comprises 232 million [Upsilon](4S) → B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. The yield and CP asymmetry are measured using an extended maximum likelihood fitting method. The branching fraction and Cp asymmetry are found to be [Beta](B{sup ±} → [rho]{sup ±}[pi]°) = [10.2 {+-} 1.4(stat) {+-} 0.9(syst)] x 10−6 and [Alpha]{sub CP}(B{sup {+-}} → [rho]{sup {+-}}[pi]°) = -0.01 {+-} 0.13(stat) {+-} 0.02(syst).

Measurement Of The K Pi Nu Nu Branching Ratio

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Author :
language : en
Publisher:
Release Date : 2008

Measurement Of The K Pi Nu Nu Branching Ratio 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.

Experiment E949 at Brookhaven National Laboratory studied the rare decay K-->pi nu{ovr {nu}} and other processes with an exposure of 1.77 x 1012 k+'s. The data were analyzed using a blind analysis technique yielding one candidate event with an estimated background of 0.30 ± 0.03 events. Combining this result with the observation of two candidate events by the predecessor experiment E787 gave the branching ratio B(K+-->pi+ nu{ovr {nu}}) = (1.47{sub -0.89}{sup +1.30}) x 10−1°, consistent with the standard model prediction of (0.74 ± 0.20) x 10−1°. This is a more detailed report of results previously published [V.V. Anisimovsky et al., Phys. Rev. Lett. 93, 031801 (2004)].

A Measurement Of B D0 K Pi Pi0 B D0 K Pi

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Author :
language : en
Publisher:
Release Date : 2003

A Measurement Of B D0 K Pi Pi0 B D0 K Pi 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 3.1 fb[sup -1] integrated luminosity accumulated with the CLEO II detector at the Cornell Electron Storage Ring, they measure the ratio of branching fractions[Beta](D[sup 0][yields] K[sup -][pi][sup+][pi][sup 0])/[Beta](D[sup 0][yields] K[sup -][pi][sup+])= 3.81[+-] 0.07[+-] 0.26, the most precise determination of this quantity to date.

Measurement Of The Branching Fraction For D Exp K Exp 0 Sub L Pi Exp

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Author : Steven Richard Stroiney
language : en
Publisher:
Release Date : 2009

Measurement Of The Branching Fraction For D Exp K Exp 0 Sub L Pi Exp written by Steven Richard Stroiney and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.