Download or read book Photoproduction of Phi 1020 Mesons on the Proton at Large Momentum Transfer written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The cross-section for phi meson photoproduction on the proton has been measured for the first time up to a four-momentum transfer t=-4 GeV2, using the CLAS detector at the Thomas Jefferson National Accelerator Facility. At low four-momentum transfer, the differential cross section is well-described by Pomeron exchange. At large four-momentum transfer, above -t=1.8 GeV2, the data support a model where the Pomeron is resolved into its simplest component, two gluons, which may couple to any quark in the proton and in the phi.

Download or read book Photoproduction of Phi Mesons written by Joseph Robert Swartz and published by . This book was released on 1971 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Photoproduction of Phi Mesons from Carbon at 1800 MeV written by Paul Joseph Mostek and published by . This book was released on 1968 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Phi meson Photoproduction from Nuclei written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We study coherent and incoherent phi-meson photoproduction from nuclei. The available data are analyzed in terms of single and coupled channel photoproduction. It is found that the data on coherent photoproduction can be well reproduced within a single channel optical model and show only little room for omega-phi mixing. These data indicate a normal distortion of the phi-meson in nuclei, which is compatible with the results obtained through the vector meson dominance model. The data on incoherent phi-meson photoproduction show an anomalous A-dependence resulting in a very strong phi-meson distortion. These data can be explained by a coupled channel effect through the dominant contribution from the omega --> phi or pi --> phi transition or, more speculative, through the excitation of a cryptoexotic B{sub omega-baryon}.

Download or read book Photoproduction of Phi Mesons with Linearly Polarized Photons written by Bernard Sandler and published by . This book was released on 1971 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Phi Meson Photoproduction with Linearly Polarized Photons at Threshold Energies written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The observables provided by linearly-polarized photons are of interest in delineating the contributions of the various hadronic processes giving rise to vector meson photoproduction. In particular, we describe how phi-meson production affords an incisive tool for exploring the nature of the parity exchange at threshold energies, the strangeness content of proton, as well as extracting signatures for the violation of Okubo-Zweig-Iizuka observation (OZI rule). Our goal is to study the gamma-vector p-->phip reaction, with phi-->K+K-, in the photon energy range of 1.7 to 2.1 GeV by using the Coherent Linear Bremsstrahlung Facility in Hall B of Jefferson Laboratory, Newport News, VA. The data were collected during the g8b run in the summer of 2005.

Download or read book Phi Photoproduction at CLAS written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The cross-section for phi meson photoproduction on the proton has been measured at a photon energy E_gamma = 3.6 GeV up to a four-momentum transfer -t = 4 GeV^2. A measurement of the differential cross-section at such high transfers, down to 100 pb/GeV^2, was only made possible thanks to the combination of the 100% duty cycle of CEBAF and the use of the large acceptance detector CLAS. At low four-momentum transfer, the differential cross-section is in agreement with previous measurements and is well accounted for by the exchange of the Pomeron. At large four-momentum transfer, above -t = 1 GeV^2, no previous data exist, and our results support a model where the Pomeron is resolved into its simplest component, two gluons. Taking into account the coupling of these gluons to any quark in the proton and the phi reproduces quite well the dependence in t of our cross-sections.

Download or read book Photoreproduction of Phi Mesons on Liquid Hydrogen with Polarized and Unpolarized Bremsstrahlung written by Howard J. Halpern and published by . This book was released on 1976 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Photoproduction of Phi mesons Off Protons by Using a Beam of Lineraly Polarized Photons at Threshold Energies written by Julian Andres Salamanca Bernal and published by . This book was released on 2009 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book First Measurement of Coherent phi meson Photoproduction on Deuteron at Low Energies written by and published by . This book was released on 2007 with total page 52202 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cross section and decay angular distributions for the coherent \phi meson photoproduction on the deuteron have been measured for the first time up to a squared four-momentum transfer t =(p_{\gamma}-p_{\phi})^2 =-2 GeV^2/c^2, using the CLAS detector at the Thomas Jefferson National Accelerator Facility. The cross sections are compared with predictions from a re-scattering model. In a framework of vector meson dominance, the data are consistent with the total \phi-N cross section \sigma_{\phi N} at about 10 mb. If vector meson dominance is violated, a larger \sigma_{\phi N} is possible by introducing larger t-slope for the \phi N \to \phi N process than that for the \gamma N \to \phi N process. The decay angular distributions of the \phi are consistent with helicity conservation.

Download or read book Inclusive Photoproduction of Phi Mesons by Photons of Energy 70 170 GeV at the Omega Spectrometer Equipped with a Ring Imaging Cerenkov Detector written by Philip John Ottewell and published by . This book was released on 1988 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Phi meson Photoproduction on Hydrogen in the Neutral Decay Mode written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report the first measurement of the photoproduction cross section of the $\phi$ meson in its neutral decay mode in the reaction $\gamma p \to p\phi(K_SK_L)$. The experiment was performed with a tagged photon beam of energy $1.6 \le E_\gamma \le 3.6$ GeV incident on a liquid hydrogen target of the CLAS spectrometer at the Thomas Jefferson National Accelerator Facility. The $p \phi$ final state is identified via reconstruction of $K_S$ in the invariant mass of two oppositely charged pions and by requiring the missing particle in the reaction $\gamma p \to p K_S X$ to be $K_L$. The presented results significantly enlarge the existing data on $\phi$-photoproduction. These data, combined with the data from the charged decay mode, will help to constrain different mechanisms of $\phi$ photoproduction.

Download or read book Photoproduction of Phi Mesons with Linearly Polarized Photons written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We propose to measure the reaction gamma(vec) + p --> p + phi with phi --> K^+K^- in the photon energy range of 1.9

Download or read book Determination of the Photoproduction Phase of Phi Mesons written by and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Photoproduction of the Phi 1020 Near Threshold written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Photoproduction of phi mesons at photon energies below 2 GeV were measured at the CLAS detector in Hall B of Thomas Jefferson National Accelerator Facility. Preliminary differential cross sections are reported from the proton near threshold. The measurement are extended to the region in the variable t where production mechanisms beyond that of diffraction are expected to become significant.

Download or read book G8b Experiment at JLab written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The experiments using polarized photos, at threshold energies, have been taken as relevant experiments because the physics behind them is expected to explain a bunch of problems into the hadronic physics. The nature of parity exchange at threshold energies, strangeness content of proton, violation of Okubo-Zweig-Iizuka observation (OZI rule), are examples of them. Photoproduction of vector mesons by using polarized photons gives a very important way to study those issues. Our goal will be measure the $\vec {\gamma} p \rightarrow \phi p $ reaction, with $\phi \rightarrow K^{+}K^{-} $, in the photon energy range of 1.7GeV to 2.1 GeV by using a Coherent Linear Polarized Photon Beam in Hall-B at Thomas Jefferson Laboratory (Newport News, VA). The experiment where data were taken was called "g8b."

Download or read book Photoproduction of phi o Mesons at High PT written by Chukwuma Kenneth Uzo and published by . This book was released on 1982 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: