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Author : James T Linnemann
Publisher :
ISBN 13 :
Total Pages : 346 pages
Book Rating : 4.E/5 ( download)
Download or read book Electroproduction of Omega Mesons written by James T Linnemann and published by . This book was released on 1978 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hans Fraas
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (115 download)
Download or read book Electroproduction of Omega-mesons as a Test of the Rho Omega Pi-vertex written by Hans Fraas and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 244 pages
Book Rating : 4.:/5 (16 download)
Download or read book Near Threshold Electroproduction of the Omega Meson at Momentum Transfer Q2 written by and published by . This book was released on 2002 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jefferson Lab kaon experiments E91016/E93018 produced data on both strangeness and vector meson electroproduction. The latter part of the experiments was focused on the electroproduction of the ? meson for momentum transfer Q 2 near 0.5 (GeV/c) 2. This reaction was selected from the inelastic ep channel, 1H (e, e' p)X, by performing involved signal background separation. Tagging the ? meson production only on electron and proton not only introduced appreciable statistical error but also a sizeable systematic uncertainty due to the background removal. Nevertheless, the analysis yielded angular distributions of the differential cross section in the threshold regime extracted with an unprecedented granularity and relatively small errors.
Author : Alan Clayton Coleman
Publisher :
ISBN 13 :
Total Pages : 186 pages
Book Rating : 4.:/5 (457 download)
Download or read book Electroproduction of Omega (783) Mesons Using CLAS at Jefferson Lab written by Alan Clayton Coleman and published by . This book was released on 1999 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wenliang Li
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
Download or read book Exclusive Backward-Angle Omega Meson Electroproduction written by Wenliang Li and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exclusive meson electroproduction at different squared four-momenta of the exchanged virtual photon, Q^2 , and at different four-momentum transfers, t and u, can be used to probe QCD's transition from hadronic degrees of freedom at the long distance scale to quark-gluon degrees of freedom at the short distance scale. Backward-angle meson electroproduction was previously ignored, but is anticipated to offer complimentary information to conventional forward-angle meson electroproduction studies on nucleon structure. This work is a pioneering study of backward-angle omega cross sections through the exclusive 1H(e, e' p)omega reaction using the missing mass reconstruction technique. The extracted cross sections are separated into the transverse (T), longitudinal (L), and LT, TT interference terms. The analyzed data were part of experiment E01-004 (Fpi-2), which used 2.6-5.2 GeV electron beams and HMS+SOS spectrometers in Jefferson Lab Hall C. The primary objective was to detect coincidence pion in the forward-angle, where the backward-angle omega events were fortuitously detected. The experiment has central Q2 values of 1.60 and 2.45 GeV2 , at W = 2.21 GeV. There was significant coverage in phi and epsilon, which allowed separation of sigma_T,L,LT,TT . The data set has a unique u coverage of −u ∼ 0, which corresponds to −t > 4 GeV2 . The separated sigma_T result suggest a flat ∼ 1/Q^1.33±1.21 dependence, whereas sigma_L seems to hold a stronger 1/Q^9.43±6.28 dependence. The sigma_L/sigma_T ratio indicate sigma_T dominance at Q2 = 2.45 GeV2 at the ∼90% confidence level. After translating the results into the −t space of the published CLAS data, our data show evidence of a backward-angle omega electroproduction peak at both Q2 settings. Previously, this phenomenon showing both forward and backward-angle peaks was only observed in the meson photoproduction data. Through comparison of our sigma_T data with the prediction of the Transition Distribution Amplitude (TDA) model, and signs of sigma_T dominance, promising indications of the applicability of the TDA factorization are demonstrated at a much lower Q2 value than its preferred range of Q2 > 10 GeV2. These studies have opened a new means to study the transition of the nucleon wavefunction through backward-angle experimental observables.
Download or read book Deeply Virtual and Exclusive Electroproduction of Omega Mesons written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The exclusive omega electroproduction off the proton was studied in a large kinematical domain above the nucleon resonance region and for the highest possible photon virtuality (Q2) with the 5.75 GeV beam at CEBAF and the CLAS spectrometer. Cross sections were measured up to large values of the four-momentum transfer ( -t
Download or read book Near Threshold Electroproduction of the Omega Meson at Q2 H"0.5 GeV2 written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Electroproduction of the omega meson was investigated in the p(e, e'p)omega reaction. The measurement was performed at a 4-momentum transfer Q2 H"0.5 GeV2. Angular distributions of the virtual photon-proton center-of-momentum cross sections have been extracted over the full angular range. These distributions exhibit a strong enhancement over t-channel parity exchange processes in the backward direction. According to a newly developed electroproduction model, this enhancement provides significant evidence of resonance formation in the gamma* p -> omega p reaction channel.
Author : Doomnull Attah Unwuchola
Publisher :
ISBN 13 :
Total Pages : 238 pages
Book Rating : 4.:/5 (884 download)
Download or read book Electroproduction of Baryonic Excitation Studied Via the Omega-meson Decay Channel written by Doomnull Attah Unwuchola and published by . This book was released on 2014 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Leif Anderson Ahrens
Publisher :
ISBN 13 :
Total Pages : 282 pages
Book Rating : 4.E/5 ( download)
Download or read book Electroproduction of the Rho Meson written by Leif Anderson Ahrens and published by . This book was released on 1978 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : S. Morrow
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (316 download)
Download or read book Deeply Virtual and Exclusive Production of the Omega Meson written by S. Morrow and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Exclusive {omega} electroproduction off the proton was measured at the highest possible four-momentum transfer with the (close to) 6 GeV beam now available at CEBAF. Cross sections are presented, together with an analysis of the {omega} spin density matrix elements. Indications are that {pi}{sup 0} exchange in the t-channel (or rather the exchange of the corresponding saturating Regge trajectory) seems to dominate the process {gamma}*p {yields} {omega}p, even for photon virtuality Q{sup 2} as large as 5 GeV{sup 2}. Contributions of the handbag type, related to Generalized Parton Distributions in the nucleon, are therefore difficult to extract from this particular process.
 Mesons Using CLAS at Jefferson Lab PDF Online Free](https://books.google.com/books/content/images/frontcover/Eg6RDAEACAAJ?fife=w200-h370)
Download or read book Electro- and Photoproduction Of[omega](783) Mesons Using CLAS at Jefferson Lab written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Electro- and photoproduction of[omega](783) from a proton target have been measured in the CLAS detector at the Thomas Jefferson National Accelerator Facility in Newport News, VA. The photoproduction data were taken over a photon energy range from 0.5 to 2.3 GeV, while the electroproduction data was obtained over a W range of 1.8--2.5 GeV/c[sup 2]. Preliminary acceptance-corrected center-of-mass angular distributions have been examined for both data sets.
![Download Properties of the [Omega] Meson from [Kappa]− +[Rho] ->[Lambda] +[Omega] PDF Online Free](https://books.google.com/books/content/images/frontcover/DW_gt9mRxlQC?fife=w200-h370)
Author :
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ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.3/5 (91 download)
Download or read book Properties of the [Omega] Meson from [Kappa]− +[Rho] ->[Lambda] +[Omega] written by and published by . This book was released on 1963 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 1074 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1979 with total page 1074 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of Spin-density Matrix in Exclusive Electroproduction of Ω Meson at HERMES. written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stanley Earl Attenberger
Publisher :
ISBN 13 :
Total Pages : 268 pages
Book Rating : 4.E/5 ( download)
Download or read book Electroproduction of Rho Mesons written by Stanley Earl Attenberger and published by . This book was released on 1974 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (871 download)
Download or read book Coherent Contributions of Nuclear Mesons to Electroproduction and the HERMES Effect written by and published by . This book was released on 2000 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors show that nuclear [sigma], [omega], and [pi] mesons can contribute coherently to enhance the electroproduction cross section on nuclei for longitudinal virtual photons at low Q2 while depleting the cross section for transverse photons. The authors are able to describe recent HERMES inelastic lepton-nucleus scattering data at low Q2 and small x using photon-meson and meson-nucleus couplings which are consistent with (but not determined by) existing constraints from meson decay widths, nuclear structure, deep inelastic scattering, and lepton pair production data. The authors find that while nuclear-coherent pion currents are not important for the present data, they could be observed at different kinematics. Their model for coherent meson electroproduction requires the assumption of mesonic currents and couplings which can be verified in separate experiments. The observation of nuclear-coherent mesons in the final state would verify their theory and allow the identification of a specific dynamical mechanism for higher-twist processes.
Download or read book Transverse-target-spin Asymmetry in Exclusive Ω-meson Electroproduction written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
