Determination of the Axial-vector Form Factor in the Radiative Decay of the Pion. [Phase Space, Branching Ratio]. PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Determination of the Axial-vector Form Factor in the Radiative Decay of the Pion. [Phase Space, Branching Ratio]. PDF full book. Access full book title Determination of the Axial-vector Form Factor in the Radiative Decay of the Pion. [Phase Space, Branching Ratio]. by . Download full books in PDF and EPUB format.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The branching ratio for the decay .pi. .-->. e.nu gamma. was measured in a counter experiment in which the e was detected in a magnetic spectrometer and the .gamma.-ray in a lead glass hodoscope. The number of observed events is 226.2 +- 22.4. The branching ratio into the phase space with electron momentum above 56 MeV/c and the electron/photon opening angle greater than 132° is found to be (5.6 +- 0.7) x 10−8. From the measured branching ratio one determines .gamma., the ratio of the axial vector to vector form factor. The vector form factor is computed using CVC and the .pi.° lifetime. For T/sub .pi./° = 0.828 x 10−16 sec, .gamma. = 0.44 +- 0.12 or .gamma. = --2.36 +- 0.12 is obtained. A comparison between the measured values of .gamma. and various theories is made.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The branching ratio for the decay .pi. .-->. e.nu gamma. was measured in a counter experiment in which the e was detected in a magnetic spectrometer and the .gamma.-ray in a lead glass hodoscope. The number of observed events is 226.2 +- 22.4. The branching ratio into the phase space with electron momentum above 56 MeV/c and the electron/photon opening angle greater than 132° is found to be (5.6 +- 0.7) x 10−8. From the measured branching ratio one determines .gamma., the ratio of the axial vector to vector form factor. The vector form factor is computed using CVC and the .pi.° lifetime. For T/sub .pi./° = 0.828 x 10−16 sec, .gamma. = 0.44 +- 0.12 or .gamma. = --2.36 +- 0.12 is obtained. A comparison between the measured values of .gamma. and various theories is made.
Author: United States. Energy Research and Development Administration. Technical Information Center Publisher: ISBN: Category : Force and energy Languages : en Pages : 982
Author: R. Keith Ellis Publisher: World Scientific ISBN: 9789810219901 Category : Science Languages : en Pages : 724
Book Description
An introduction to symmetry breaking in the standard model / Edward Farhi -- Physics beyond the standard model / Jonathan A. Bagger -- Chiral effective Lagrangians / Heinrich Leutwyler -- Towards semi-classical string theory / Jeffrey A. Harvey -- Renormalization of electroweak gauge interactions / Dallas C. Kennedy -- Electroweak experiments at LEP / Alain Blondel -- The CKM matrix and CP violation / Yosef Nir -- Axion searches / Pierre Sikivie -- Lattice QCD / Andreas S. Kronfeld -- Introduction to perturbative QCD / George Sterman -- Heavy quark effective field theory / Howard Georgi -- Heavy flavor physics on the lattice / Estia Eichten -- Two lectures on neutrinos / Pierre Ramond
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The radiative pion decay .pi. .-->. ee−e+.nu. has been observed for the first time with a branching ratio of (3.4 +- 0.5) x 10−9. From the kinematical distribution of 79 events information on the form factors was extracted. The vector form factor F/sub V/ was found to have the same sign as the pion decay constant f/sub .pi./. For the axial-vector form factors the following values have been measured: .gamma. = F/sub A//F/sub V/ = 0.7 +- 0.5 and xi = R/F/sub V/ = 2.3 +- 0.6. This value of .gamma. agrees well with the small positive value of (0.53 +- 0.06) and excludes the large negative value obtained in .pi.+ .-->. e+.nu gamma. experiments. 8 refs. 8 refs.
![Determination of the Axial-vector Form Factor in the Radiative Decay of the Pion. [Phase Space, Branching Ratio]. PDF](https://books.google.com/books/content/images/frontcover/U2p0AQAACAAJ?fife=w150-h200)
Author: ![Determination of the Axial-vector Form Factor in the Radiative Decay of the Pion. [Phase Space, Branching Ratio]. PDF](https://books.google.com/books/content/images/frontcover/U2p0AQAACAAJ?fife=w80-h100)
Author: 
Author: Douglas Alan Ortendahl
Author: 
Author: United States. Energy Research and Development Administration
Author: United States. Energy Research and Development Administration. Technical Information Center
Author: 
Author: 
Author: 
Author: R. Keith Ellis![First Observation of the Decay. Pi. . --]. Ee−e+. Nu. and a Determination of the Form Factors F PDF](https://books.google.com/books/content/images/frontcover/WOmMAQAACAAJ?fife=w80-h100)
Author: