Download or read book The Pion Electromagnetic Form Factor and the Veneziano Model written by A. Amatya and published by . This book was released on 1969 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pion Electromagnetic Form Factor in Virtuality Distribution Formalism written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We discuss two applications of the {\it Virtuality Distribution Amplitudes} (VDA) formalism developed in our recent papers. We start with an overview of the main properties of the pion distribution amplitude emphasizing the quantitative measures of its width, and possibility to access them through the pion transition form factor studies. We formulate the basic concepts of the VDA approach and introduce the pion {\it transverse momentum distribution amplitude} (TMDA) which plays, in a covariant Lagrangian formulation, a role similar to that of the pion wave function in the 3-dimensional Hamiltonian light-front approach. We propose simple factorized models for soft TMDAs, and use them to describe existing data on the pion transition form factor, thus fixing the scale determining the size of the transverse-momentum effects. Finally, we apply the VDA approach to the one-gluon exchange contribution for the pion electromagnetic form factor. We observe a very late $Q^2 \gtrsim 20$ GeV$^2$ onset of transition to the asymptotic pQCD predictions and show that in the $Q^2 \lesssim 10$ GeV$^2$ region there is essentially no sensitivity to the shape of the pion distribution amplitude. Furthermore, the magnitude of the one-gluon exchange contribution in this region is estimated to be an order of magnitude below the Jefferson Lab data, thus leaving the Feynman mechanism as the only one relevant to the pion electromagnetic form factor behavior for accessible $Q^2$.

Download or read book A Proposal for Determining the Electromagnetic Form Factor of the Pion written by William Robert Frazer and published by . This book was released on 1959 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Energy Physics Index written by and published by . This book was released on 1971 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pion Electromagnetic Form Factor in the Kroll Lee Zumino Model at Zero and Finite Temperature written by Bernard Willers and published by . This book was released on 2008 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1974 with total page 1036 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1970 with total page 1338 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lettere Al Nuovo Cimento written by and published by . This book was released on 1970 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Pion Electromagnetic Form Factor written by and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: A ratio of correlation functions is identified from which the pion form factor can be obtained directly. Preliminary results from quenched Wilson simulations are presented.

Download or read book Japanese Journals of Physics Subject written by Nichigai Asoshiētsu and published by . This book was released on 1975 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Charge conjugation Symmetric Complete Impulse Approximation for the Pion Electromagnetic Form Factor in the Covariant Spectator Theory written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The pion form factor is calculated in the framework of the charge-conjugation invariant covariant spectator theory. This formalism is established in Minkowski space, and the calculation is set up in momentum space. In a previous calculation we included only the leading pole coming from the spectator quark (referred to as the relativistic impulse approximation). In this study we also include the contributions from the poles of the quark which interacts with the photon and average over all poles in both the upper and lower half-planes in order to preserve charge conjugation invariance (referred to as the C-symmetric complete impulse approximation). We find that for small pion mass these contributions are significant at all values of the four-momentum transfer Q2 but, surprisingly, do not alter the shape obtained from the spectator poles alone.

Download or read book Japanese Journals of Physics written by Nichigai Asoshiētsu and published by . This book was released on 1975 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book IBZ kombinierte Folge written by and published by . This book was released on 1973 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book New Results for the Charged Pion Electromagnetic Form Factor written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Separated longitudinal and transverse structure functions for the reaction 1 H(e, e'pi)n were measured in the momentum transfer region Q2=0.6-1.6(GeV/c)2 at a value of the invariant mass W=1.95 GeV. New values for the pion charge form factor were extracted from the longitudinal cross section by using a recently developed Regge model. The results indicate that the pion form factor in this region is larger than previously assumed and is consistent with a monopole parameterization fitted to very low Q2 elastic data.

Download or read book Physical Review Physical Review Letters A L written by Nichigai Asoshiētsu and published by . This book was released on 1974 with total page 862 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Revue Roumaine de Physique written by and published by . This book was released on 1970 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: