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The Polarised Target Asymmetry For Neutral Pion Photoproduction From Protons In The Photon Energy Range 07 145 Gev
Download The Polarised Target Asymmetry For Neutral Pion Photoproduction From Protons In The Photon Energy Range 07 145 Gev full books in PDF, epub, and Kindle. Read online The Polarised Target Asymmetry For Neutral Pion Photoproduction From Protons In The Photon Energy Range 07 145 Gev ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis The Polarised Target Asymmetry for Neutral Pion Photoproduction from Protons in the Photon Energy Range 0.7 - 1.45 GeV by : P. S. L. Booth
Download or read book The Polarised Target Asymmetry for Neutral Pion Photoproduction from Protons in the Photon Energy Range 0.7 - 1.45 GeV written by P. S. L. Booth and published by . This book was released on 1976 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Target Asymmetry for Neutral $pi$ Meson Photoproduction on Polarized Protons at 4 GeV in the Forward Direction by :
Download or read book Target Asymmetry for Neutral $pi$ Meson Photoproduction on Polarized Protons at 4 GeV in the Forward Direction written by and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polarization of Recoil Protons from Neutral Pion Photoproduction by : David Eugene Lundquist
Download or read book Polarization of Recoil Protons from Neutral Pion Photoproduction written by David Eugene Lundquist and published by . This book was released on 1967 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Incoherent Pion Photoproduction on the Deuteron by : Eed M. Darwish
Download or read book Incoherent Pion Photoproduction on the Deuteron written by Eed M. Darwish and published by LAP Lambert Academic Publishing. This book was released on 2015-03-26 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Incoherent pion photoproduction on the deuteron is investigated with inclusion of all leading NN effects. Formal expressions for polarization observables are derived and described by various beam, target and beam-target asymmetries for polarized photons and/or oriented deuterons. Results are given for unpolarized cross sections and all possible polarization observables with polarized photons and/or oriented deuterons. The contributions to the spin asymmetry and the Gerasimov-Drell-Hearn (GDH) integral from separate channels are evaluated by explicit integration up to a photon lab-energy of 350 MeV. Effects of final-state interaction are investigated and their role in these observables are found to be significant, specially for neutral-pion production. The extracted results are compared with available experimental data and predictions of other works, and a satisfactory agreement is obtained. We expect that the results presented in this book may be useful to interpret the recent measurements from the high-intensity and high duty-factor electron accelerators MAMI, ELSA, Jefferson Lab, LEGS, MAX-Lab, SPring-8, LNS, and GRAAL."
Book Synopsis Asymmetry in N+ Photoproduction from a Polarized Target at 5 AND16 GeV. by :
Download or read book Asymmetry in N+ Photoproduction from a Polarized Target at 5 AND16 GeV. written by and published by . This book was released on 1970 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Asymmetry in Inclusive [pi]{sup {+-}}, P Production at 22 GeV, BNL E925 by :
Download or read book Asymmetry in Inclusive [pi]{sup {+-}}, P Production at 22 GeV, BNL E925 written by and published by . This book was released on 1998 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preliminary results from Experiment E925 on inclusive pion asymmetries from a 22 GeV/c polarized proton beam on a carbon target show significant asymmetries for [pi]{sup {+-}} production similar to those observed earlier at the ZGS and Fermilab with beams of 12 and 200 GeV respectively. This experiment demonstrates the viability of using the analyzing power in inclusive pion production for high energy beam polarimetry at RHIC. Inclusive proton asymmetries are consistent with zero.
Book Synopsis Neutral Pion Double Helicity Asymmetry in Polarized Proton-Proton Collisions at [the Square Root of Sigma] by : William Axel Leight
Download or read book Neutral Pion Double Helicity Asymmetry in Polarized Proton-Proton Collisions at [the Square Root of Sigma] written by William Axel Leight and published by . This book was released on 2012 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the primary goals of the spin physics program at the STAR experiment is to constrain the polarized gluon distribution function, [delta]g(X,Q2), by measuring the double longitudinal spin asymmetry, ALL, of various final-state channels. Neutral pions provide a potentially powerful final state because they are copiously produced in p+p collisions and have few backgrounds. In 2009, STAR took 14 pb-1 of integrated luminosity of 200 GeV p+p collisions, with average beam longitudinal polarization of 59%. Neutral pions produced in these collisions can be identified using STAR's large-acceptance electromagnetic calorimeter, with help from tracking from the STAR Time Projection Chamber. This work presents a measurement of the inclusive neutral pion ALL from this data, based on a new [pi]0 reconstruction algorithm. A comparison to theoretical predictions and other experimental results suggests that the current best-fit value of AG, the gluon contribution to the proton spin, is too small and that [delta]G is actually comparable in magnitude to the quark contribution to the proton spin [delta][sigma].
Book Synopsis Polarized Sources And Targets, Proceedings Of The Ninth International Workshop by : Vladimir (Laddie) Derenchuk
Download or read book Polarized Sources And Targets, Proceedings Of The Ninth International Workshop written by Vladimir (Laddie) Derenchuk and published by World Scientific. This book was released on 2002-05-16 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an up-to-date survey of the science and technology of creating polarized beams and polarized targets. The papers in this collection describe state-of-the-art sources of polarized electrons, ions, atoms, neutrons, and radioactive isotopes, discuss new polarized solid and gas target techniques, present recent advances in polarimetry, and review the use of polarized gas in medical imaging.
Book Synopsis Theoretical Investigation of the Asymmetry of Pion Photoproduction with a Polarized Target by : Gustav Kramer
Download or read book Theoretical Investigation of the Asymmetry of Pion Photoproduction with a Polarized Target written by Gustav Kramer and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Asymmetry Measurements for Neutral Pion and Positive Pion Photoproduction by Linearly Polarized Gamma Rays in the Energy Range 400-900 MeV. by : R. W. Zdarko
Download or read book Asymmetry Measurements for Neutral Pion and Positive Pion Photoproduction by Linearly Polarized Gamma Rays in the Energy Range 400-900 MeV. written by R. W. Zdarko and published by . This book was released on 1971 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The asymmetry ratio A = sigma normal - sigma parallel/sigma normal + sigma parallel has been measured using linearly polarized gamma-rays for neutral pion photoproduction. For the reaction gamma + P yields n + Positive pion, measurements were taken for theta sub cm = 135 degrees at gamma-ray energies ranging from 390 to 909 MeV. For the reaction gamma + P yields P + neutral pion, measurements were taken for theta sub cm = 60 degrees and 90 degrees at gamma-ray energies ranging from 426 to 918 MeV. (Author).
Book Synopsis Polarization Measurements on the Recoil Proton from Pion (o) Photoproduction by : D. Lundquist
Download or read book Polarization Measurements on the Recoil Proton from Pion (o) Photoproduction written by D. Lundquist and published by . This book was released on 1965 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The polarization of the recoil proton in pion(o) photoproduction off hydrogen has been measured for photons in the range 500-1000 MeV, using the Stanford Mark III linear accelerator. Protons were detected at an angle b and momentum analyzed using a 90 degree magnetic spectrometer. The scattered protons were detected by two counter telescopes placed symmetrically to left and right of the carbon target and making angles = C with respect to the direction of a proton emerging from the spectrometer. The measured asymmetry was obtained from the usual formula: e = L-R/L+R and the proton polarization P(b) was then obtained by substituting the known carbon analyzing power A(c) in the equation e(b, c) = (P(b) A(c). Using parity conservation it can be shown that P(b) = -P(b). Thus the running time was equally divided between measurements with the spectrometer at +b and -b. This technique enabled residual artificial asymmetries to be removed, since these do not change sign when b becomes -b. Preliminary results are presented and compared to existing data from various laboratories. (Author).
Book Synopsis Coherent Photoproduction of ¿-Mesons Off Protons at Threshold Energies by : Julian Salamanca
Download or read book Coherent Photoproduction of ¿-Mesons Off Protons at Threshold Energies written by Julian Salamanca and published by LAP Lambert Academic Publishing. This book was released on 2010-09 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Observables from vector meson photoproduction by linearly-polarized photons can be expressed in term of bilinear combinations of helicity amplitudes parameterized by the Spin Density Matrix Elements (SDMEs). These SDMEs give straightforward relations for understanding the nature of the parity exchange at threshold energies, as well as for extracting signatures of the Okubo-Zweig-Iizuka violation. Measurement of SDMEs for p p in the photon energy range of 1.7 to 1.9 GeV(momentum transfer squared t range of 1.2 to 0.25 GeV2 ) and 1.9 to 2.1 GeV (t range of 1.4 to 0.25 GeV2 ) from the g8b experimental data collected in the summer of 2005 in the Hall B of Jefferson Lab are reported herein.
Book Synopsis Beam-Helicity Asymmetries in Double-Charged-Pion Photoproduction on the Proton by :
Download or read book Beam-Helicity Asymmetries in Double-Charged-Pion Photoproduction on the Proton written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Beam-helicity asymmetries for the two-pion-photoproduction reaction gamma + p --> p pi+ pi- have been studied for the first time in the resonance region for center-of-mass energies between 1.35 GeV and 2.30 GeV. The experiment was performed at Jefferson Lab with the CEBAF Large Acceptance Spectrometer using circularly polarized tagged photons incident on an unpolarized hydrogen target. Beam-helicity-dependent angular distributions of the final-state particles were measured. The large cross-section asymmetries exhibit strong sensitivity to the kinematics and dynamics of the reaction. The data are compared with the results of various phenomenological model calculations, and show that these models currently do not provide an adequate description for the behavior of this new observable.
Book Synopsis Recoil Proton Polarization from Neutral Pion Photoproduction on Hydrogen in the Energy Range from 1200 to 1800 MeV. by : Nobuyuki Tanaka
Download or read book Recoil Proton Polarization from Neutral Pion Photoproduction on Hydrogen in the Energy Range from 1200 to 1800 MeV. written by Nobuyuki Tanaka and published by . This book was released on 1969 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Photoproduction of Neutral Pions from Protons Between 0.7 GeV and 1.7 GeV by : J. S. Barton
Download or read book The Photoproduction of Neutral Pions from Protons Between 0.7 GeV and 1.7 GeV written by J. S. Barton and published by . This book was released on 1974 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Longitudinal Double-spin Asymmetry and Cross Section for Inclusive Neutral Pion Production in Polarized Proton Collisions at [the Square Root of Sigma] by : Alan Michael Hoffman
Download or read book Longitudinal Double-spin Asymmetry and Cross Section for Inclusive Neutral Pion Production in Polarized Proton Collisions at [the Square Root of Sigma] written by Alan Michael Hoffman and published by . This book was released on 2009 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twenty years of polarized lepton-nucleon scattering experiments have found that the contribution from quark spins (1/2[delta] [sigma]) to the spin of the proton is only ~ 35%. This has lead researchers to look elsewhere, specifically to gluon spin ([delta sigma]) for a large contribution to proton spin. [delta sigma] has been only loosely constrained in polarized DIS and SIDIS experiments. Polarized proton-proton collisions at RHIC provide sensitivity to [delta sigma] through measurements of the longitudinal double-spin asymmetry, ALL. This work presents a measurement of ALL for inclusive 7ro production in polarized proton-proton collisions using the STAR detector and data from RHIC Run 6. 7r0s are abundantly produced at mid-rapidity in proton-proton collisions, making them natural candidates for studies of [delta] [sigma]. Novel techniques for reconstructing 7ros at STAR are discussed, and a measurement of the unpolarized cross section presented. Finally, the measured ALL is compared to perturbative QCD predictions and from this comparison constraints are placed on [delta] [sigma].
Book Synopsis MEASUREMENT OF SINGLE TRANSVERSE-SPIN ASYMMETRY IN FORWARD PRODUCTION OF PHOTONS AND NEUTRONS IN PP COLLSION AT SQUARE ROOT by :
Download or read book MEASUREMENT OF SINGLE TRANSVERSE-SPIN ASYMMETRY IN FORWARD PRODUCTION OF PHOTONS AND NEUTRONS IN PP COLLSION AT SQUARE ROOT written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Relativistic Heavy Ion Collider (RHIC) at the Brookhaven National Laboratory (BNL) was commissioned for polarized proton-proton collisions, at the center of mass energy (square root)s = 200 GeV during the run in 2001-2002. The authors have measured the single transverse-spin asymmetry A{sub N} for production of photons, neutral pions, and neutrons at the very forward angle. The asymmetries for the photon and neutral pion sample were consistent with zero within the experimental uncertainties. In contrast, the neutron sample exhibited an unexpectedly large asymmetry. This large asymmetry will be used for the non-destructive polarimeter for polarized proton beams at the collision points in the RHIC interaction region.
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