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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:
Download or read book Transverse-target-spin Asymmetry in Exclusive W-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:
Author : Jeroen Dreschler
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (269 download)
Download or read book Transverse Target-spin Asymmetry in Exclusive Electroproduction of Rho0 Mesons written by Jeroen Dreschler and published by . This book was released on 2008 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Transverse Target-spin Asymmetry in Exclusive Electroproduction of [subscript P0] Mesons PDF Online Free](https://books.google.com/books/content/images/frontcover/BgUAMwEACAAJ?fife=w200-h370)
Author : Jeroen Dreschler
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (5 download)
Download or read book Transverse Target-spin Asymmetry in Exclusive Electroproduction of [subscript P0] Mesons written by Jeroen Dreschler and published by . This book was released on 2008 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jeroen Dreschler
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (277 download)
Download or read book Transverse Target-spin Asymmetry in Exclusive Electroproduction of P0 Mesons written by Jeroen Dreschler and published by . This book was released on 2008 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Frank Thanh Cao
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (119 download)
Download or read book Beam-Spin Asymmetry of Exclusive Coherent Electroproduction of the Π0 Off 4He written by Frank Thanh Cao and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: To understand the partonic structure of nucleons in nuclei, measuring the beam spin asymmetry (BSA) from exclusive processes is important to get at the so-called Generalized Parton Distributions (GPDs) that describe the partons' behavior inside the nucleon. In particular, BSA in Deeply Virtual Meson Production (DVMP) can offer valuable constraints on the transverse GPDs which are not accessible with other exclusive processes. Furthermore, DVMP measurements on bound nucleons can offer insights into structure modification due to the nuclear environment. The interpretation of this bounded nucleon DVMP on nuclear targets rests on the assumption of factorization and that higher-order effects are negligible. These assumptions can be tested through measurement of nuclear DVMP on a spin-0 target, where at leading order the BSA should be zero. In the CLAS EG6 experiment, the spin-0 helium-4 gas target is probed via the deeply virtual (Q^2 > 2 (GeV/c)^2) photons from 6 GeV longitudinally polarized electrons. The results of coherent meson electroproduction of pi-zero off heliium-4, where the BSA is measured to be consistent with zero, will be presented and discussed. This benchmark measurement is in agreement with symmetry arguments of a recent theoretical formulation that offers a framework complementary to that of the GPDs and gives confidence in the assumptions made for future studies of exclusive nuclear processes.
Author : Anatoly Radyushkin
Publisher : World Scientific
ISBN 13 : 9814471518
Total Pages : 453 pages
Book Rating : 4.8/5 (144 download)
Download or read book Exclusive Reactions At High Momentum Transfer - Proceedings Of The International Workshop written by Anatoly Radyushkin and published by World Scientific. This book was released on 2008-03-13 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exclusive reactions are becoming one of the major sources of information about the deep structure of nucleons and other hadrons. The 2007 International Workshop held at Jefferson Lab in Newport News, Virginia, USA — the world's leading facility performing research on nuclear, hadronic and quark-gluon structure of matter — focused on the application of a variety of exclusive reactions at high momentum transfer, utilizing unpolarized and polarized beams and targets, to obtain information about nucleon ground-state and excited-state structure at short distances. This is a subject which is central to the programs of current accelerators and especially planned future facilities.This proceedings volume contains, in concentrated form, information about the newest developments, both theoretical and experimental, in the study of hard exclusive reactions.
Author : A. V. Radyushkin
Publisher : World Scientific
ISBN 13 : 9812796959
Total Pages : 453 pages
Book Rating : 4.8/5 (127 download)
Download or read book Exclusive Reactions at High Momentum Transfer written by A. V. Radyushkin and published by World Scientific. This book was released on 2008 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exclusive reactions are becoming one of the major sources of information about the deep structure of nucleons and other hadrons. The 2007 International Workshop held at Jefferson Lab in Newport News, Virginia, USA - the world's leading facility performing research on nuclear, hadronic and quark-gluon structure of matter - focused on the application of a variety of exclusive reactions at high momentum transfer, utilizing unpolarized and polarized beams and targets, to obtain information about nucleon ground-state and excited-state structure at short distances. This is a subject which is central to the programs of current accelerators and especially planned future facilities. This proceedings volume contains, in concentrated form, information about the newest developments, both theoretical and experimental, in the study of hard exclusive reactions.
Author : Katharina Schmidt
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (971 download)
Download or read book Transverse Target Spin Asymmetries in Exclusive Vector Meson Muoproduction written by Katharina Schmidt and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Johannes ter Wolbeek
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (962 download)
Download or read book Azimuthal Asymmetries in Hard Exclusive Meson Muoproduction Off Transversely Polarized Protons written by Johannes ter Wolbeek and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Zusammenfassung: In 2010, the COMPASS experiment at CERN took data with a 160 GeV muon beam and a transversely polarized ammonia target. In this thesis, this data is analyzed for azimuthal target spin asymmetries, including five single spin and three double spin asymmetries in hard exclusive omega meson production.For the asymmetry extraction an extended unbinned maximum likelyhood fit, is used. With this method the eight azimuthal asymmetries from hard exclusive omega meson production plus eight additional asymmetries of the same azimuthal angle modulation from semi-inclusive background events are calculated simultaneously. Therefore every event from the signal region is assigned with the probabilities obtained with the fit to the missing energy distribution.The asymmetries obtained in this analysis can help to constrain Generalized Parton Distributions (GPDs). This is done by comparing the measurements to model calculations of the asymmetries in the COMPASS kinematics. In this thesis the results are compared to the model from Goloskokov and Kroll, which is in good agreement with the data. Especially in combination with results from other vector meson channels, as for example the rho meson, which has already been analyzed, additional constrains on the GPDs E for u and d quarks are enabled
![Download Measurement of Single-target Spin Asymmetries in the Electroproduction of Negative Pions in the Semi-inclusive Deep Inelastic Reaction N1!e, E'[pi]- )X on a Transversely Polarized 3He Target PDF Online Free](https://books.google.com/books/content/images/frontcover/bQiLAQAACAAJ?fife=w200-h370)
Author :
Publisher :
ISBN 13 :
Total Pages : 284 pages
Book Rating : 4.:/5 (946 download)
Download or read book Measurement of Single-target Spin Asymmetries in the Electroproduction of Negative Pions in the Semi-inclusive Deep Inelastic Reaction N1!e, E'[pi]- )X on a Transversely Polarized 3He Target written by and published by . This book was released on 2010 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The experiment E06010 measured the target single spin asymmetry (SSA) in the semiinclusive deep inelastic (SIDIS) n1!e, e'[pi]- )X reaction with a transversely polarized 3He target as an e ective neutron target. This is the very rst independent measurement of the neutron SSA, following the measurements at HERMES and COMPASS on the proton and the deuteron. The experiment acquired data in Hall A at Je erson Laboratory with a continuous electron beam of energy 5.9 GeV, probing the valence quark region, with x = 0.13 2!0.41, at Q2 = 1.31 2!3.1 GeV2. The two contributing mechanisms to the measured asymmetry, viz, the Collins effect and the Sivers effect can be realized through the variation of the asymmetry as a function of the Collins and Sivers angles. The neutron Collins and Sivers moments, associated with the azimuthal angular modulations, are extracted from the measured asymmetry for the very first time and are presented in this thesis. The kinematics of this experiment is comparable to the HERMES proton measurement. However, the COMPASS measurements on deuteron and proton are in the low-x region. The results of this experiment are crucial as the first step toward the extraction of quark transversity and Sivers distribution functions in SIDIS. With the existing results on proton and deuteron, these new results on neutron will provide powerful constraints on the transversity and Sivers distributions of both the u and d-quarks in the valence region.
Author : Vincenzo Barone
Publisher : World Scientific
ISBN 13 : 9812381015
Total Pages : 308 pages
Book Rating : 4.8/5 (123 download)
Download or read book Transverse Spin Physics written by Vincenzo Barone and published by World Scientific. This book was released on 2003 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to the theory and phenomenology of transverse-spin effects in high-energy hadronic physics. Contrary to common past belief, it is now rather clear that such effects are far from irrelevant. A decade or so of intense theoretical work has shed much light on the subject and brought to surface an entire class of new phenomena, which now await thorough experimental investigation. Over the next few years a number of experiments world-wide (at BNL, CERN, DESY and JLAB) will run with transversely polarised beams and targets, providing data that will enrich our knowledge of the transverse-spin structure of hadrons. It is therefore timely to assess the state of the art, and this is the principal aim of the volume.An outline of the book is as follows. After a few introductory remarks (Chapter 1), attention is directed in Chapter 2 to transversely polarised deeply-inelastic scattering (DIS), which probes the transverse spin structure function 2. This existing data are reviewed and discussed (for completeness, a brief presentation of longitudinally polarised DIS is also provided). In Chapter 3 the transverse-spin structure of the proton is illustrated in detail, with emphasis on the transversity distribution and the twist-three parton distribution contributing to g2. Model calculations of these quantities are also presented. In Chapter 4, the QCD evolution of transversity is studied at leading and next-to-leading order. Chapter 5 illustrates the g2 structure function and its related sum rules within the framework of perturbative QCD. The last three chapters are devoted to the phenomenology of transversity, in the context of Drell-Yan processes (Chapter 6), inclusive leptoproduction (Chapter 7) and inclusive hadroproduction (Chapter 8). The interpretation of some recent single-spin asymmetry data is discussed and the prospects for future measurements are reviewed.
Author :
Publisher :
ISBN 13 :
Total Pages : 284 pages
Book Rating : 4.:/5 (16 download)
Download or read book Measurement of Single-target Spin Asymmetries in the Electroproduction of Negative Pions in the Semi-inclusive Deep Inelastic Reaction N{u2191}(e,e'?-)X on a Transversely Polarized 3He Target written by and published by . This book was released on 2010 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The experiment E06010 measured the target single spin asymmetry (SSA) in the semiinclusive deep inelastic (SIDIS) n↑(e,e'?-)X reaction with a transversely polarized 3He target as an e ective neutron target. This is the very rst independent measurement of the neutron SSA, following the measurements at HERMES and COMPASS on the proton and the deuteron. The experiment acquired data in Hall A at Je erson Laboratory with a continuous electron beam of energy 5.9 GeV, probing the valence quark region, with x = 0.13 → 0.41, at Q2 = 1.31 → 3.1 GeV2. The two contributing mechanisms to the measured asymmetry, viz, the Collins effect and the Sivers effect can be realized through the variation of the asymmetry as a function of the Collins and Sivers angles. The neutron Collins and Sivers moments, associated with the azimuthal angular modulations, are extracted from the measured asymmetry for the very first time and are presented in this thesis. The kinematics of this experiment is comparable to the HERMES proton measurement. However, the COMPASS measurements on deuteron and proton are in the low-x region. The results of this experiment are crucial as the first step toward the extraction of quark transversity and Sivers distribution functions in SIDIS. With the existing results on proton and deuteron, these new results on neutron will provide powerful constraints on the transversity and Sivers distributions of both the u and d-quarks in the valence region.
Download or read book Measurement of Single and Double Spin Asymmetries in Deep Inelastic Pion Electroproduction with a Longitudinally Polarized Target written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report the first measurement of the transverse momentum dependence of double spin asymmetries in semi-inclusive production of pions in deep inelastic scattering off the longitudinally polarized proton. Data have been obtained using a polarized electron beam of 5.7 GeV with the CLAS detector at the Thomas Jefferson National Accelerator Facility (JLab). A significant non-zero $\sin2\phi$ single spin asymmetry was also observed for the first time indicating strong spin-orbit correlations for transversely polarized quarks in the longitudinally polarized proton. The azimuthal modulations of single spin asymmetries have been measured over a wide kinematic range.
Author : M. Anselmino
Publisher : IOS Press
ISBN 13 : 1607503484
Total Pages : 496 pages
Book Rating : 4.6/5 (75 download)
Download or read book Strangeness and Spin in Fundamental Physics written by M. Anselmino and published by IOS Press. This book was released on 2008-07-14 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strangeness and Spin in Fundamental Physics is dedicated to the discussion of the role played by two subtle and somehow puzzling quantum numbers, the strangeness and the spin, in fundamental physics. They both relate to basic properties of the fundamental quantum field theories describing strong and electro-weak interactions and to their phenomenological applications. In some instances, like the partonic spin structure of the proton, they are deeply correlated. The many puzzling results recently obtained by measuring several spin asymmetries have stimulated gigantic progresses in the study of the spin structure of protons and neutrons. Intense theoretical activity has discovered new features of non-perturbative QCD, like strong correlations between the spin and the intrinsic motions of quarks inside the nucleons. The purpose of this publication is that of providing a complete, updated and critical account of the most recent and relevant discoveries in the above fields, both from the experimental and theoretical sides.
Author : Simonetta Liuti
Publisher : World Scientific
ISBN 13 : 9814478490
Total Pages : 298 pages
Book Rating : 4.8/5 (144 download)
Download or read book Quark-hadron Duality And The Transition To Pqcd - Proceedings Of The First Workshop written by Simonetta Liuti and published by World Scientific. This book was released on 2006-02-06 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: While perturbative QCD methods fully describe experimental results at high energies, and chiral perturbation theory is the low energy effective theory of the strong interactions, a form of duality is observed connecting these two regimes. In these intermediate kinematics, a wide variety of reactions are observed which can be described simultaneously by single particle (quark) scattering, and by exclusive resonance (hadron) scattering.The contributions in this proceedings volume discuss recent and existing results, and aim to foster current and future research, investigating the phenomenon of quark-hadron duality.This unique volume contains research work by scientists from different arenas of hadronic physics, dealing with different manifestations of quark-hadron duality.
Author : Anatoly Radyushkin
Publisher : World Scientific
ISBN 13 : 981432955X
Total Pages : 486 pages
Book Rating : 4.8/5 (143 download)
Download or read book Exclusive Reactions at High Momentum Transfer IV written by Anatoly Radyushkin and published by World Scientific. This book was released on 2011 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Proceedings include talks given at the 4th Workshop on Exclusive Reactions at High Momentum Transfer at Jefferson Lab, Newport News, VA USA, the world's leading facility performing research on nuclear, hadronic and quark-gluon structure of matter. Exclusive reactions are becoming one of the major sources of information about the deep structure of the nucleons and other hadrons. The workshop focused on the application of a variety of exclusive reactions at high momentum transfer, utilizing unpolarized and polarized beams and targets, to obtain information about nucleon ground state and excited state structure at short distances. This is a subject which is central to the programs of current accelerators and especially planned future facilities. The topics include: generalized parton distributions, deeply virtual Compton scattering, deeply virtual meson production (DVMP), transverse structure of hadrons (TMD), hadron form factors ? elastic and transition, quantum chromodynamics (perturbative, non-perturbative, lattice calculations), and physics to study at an Electron Ion Collider.
