Azimuthal And Single Spin Asymmetry In Deep Inelasticlepton Nucleon Scattering PDF Download
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Download Azimuthal and Single Spin Asymmetry in Deep-inelasticlepton-nucleon Scattering Book in PDF, ePub and Kindle
The collinear expansion technique is generalized to thefactorization of unintegrated parton distributions and other higher twistparton correlations from the corresponding collinear hard parts thatinvolve multiple parton final state interaction. Such a generalizedfactorization provides a consistent approach to the calculation ofinclusive and semi-inclusive cross sections of deep-inelasticlepton-nucleon scattering. As an example, the azimuthal asymmetry iscalculated to the order of 1/Q in semi-inclusive deeply inelasticlepton-nucleon scattering with transversely polarized target. Anon-vanishing single-spin asymmetry in the "triggered inclusive process"is predicted to be 1/Q suppressed with a part of the coefficient relatedto a moment of the Sivers function.
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Total Pages | : 8 |
Release | : 2007 |
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Download Final-State Interactions and Single-Spin Asymmetries in Semi-inclusive Deep Inelastic Scattering Book in PDF, ePub and Kindle
Recent measurements from the HERMES and SMC collaborations show a remarkably large azimuthal single-spin asymmetries A{sub UL} and A{sub UT} of the proton in semi-inclusive pion leptoproduction [gamma]*(q)p → [pi]X. We show that final-state interactions from gluon exchange between the outgoing quark and the target spectator system leads to single-spin asymmetries in deep inelastic lepton-proton scattering at leading twist in perturbative QCD; i.e., the rescattering corrections are not power-law suppressed at large photon virtuality q2 at fixed x{sub bj}. The existence of such single-spin asymmetries requires a phase difference between two amplitudes coupling the proton target with J{sup z}{sub p} = ±1/2 to the same final-state, the same amplitudes which are necessary to produce a nonzero proton anomalous magnetic moment. We show that the exchange of gauge particles between the outgoing quark and the proton spectators produces a Coulomb-like complex phase which depends on the angular momentum L{sup z} of the proton's constituents and thus is distinct for different proton spin amplitudes. The single-spin asymmetry which arises from such final-state interactions does not factorize into a product of structure function and fragmentation function, and it is not related to the transversity distribution [delta]q(x;Q) which correlates transversely polarized quarks with the spin of the transversely polarized target nucleon.
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Release | : 2020 |
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Download Azimuthal Single- and Double-spin Asymmetries in Semi-inclusive Deep-inelastic Lepton Scattering by Transversely Polarized Protons Book in PDF, ePub and Kindle
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Total Pages | : 16 |
Release | : 2011 |
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Download Transverse Spin Structure of the Nucleon Through Target Single Spin Asymmetry in Semi-Inclusive Deep-Inelastic $(e, E^\prime \pi^\pm)$ Reaction at Jefferson Lab Book in PDF, ePub and Kindle
Jefferson Lab (JLab) 12 GeV energy upgrade provides a golden opportunity to perform precision studies of the transverse spin and transverse-momentum-dependent structure in the valence quark region for both the proton and the neutron. In this paper, we focus our discussion on a recently approved experiment on the neutron as an example of the precision studies planned at JLab. The new experiment will perform precision measurements of target Single Spin Asymmetries (SSA) from semi-inclusive electro-production of charged pions from a 40-cm long transversely polarized $^3$He target in Deep-Inelastic-Scattering kinematics using 11 and 8.8 GeV electron beams. This new coincidence experiment in Hall A will employ a newly proposed solenoid spectrometer (SoLID). The large acceptance spectrometer and the high polarized luminosity will provide precise 4-D ($x$, $z$, $P_T$ and $Q^2$) data on the Collins, Sivers, and pretzelocity asymmetries for the neutron through the azimuthal angular dependence. The full 2$\pi$ azimuthal angular coverage in the lab is essential in controlling the systematic uncertainties. The results from this experiment, when combined with the proton Collins asymmetry measurement and the Collins fragmentation function determined from the e$^+$e$^-$ collision data, will allow for a quark flavor separation in order to achieve a determination of the tensor charge of the d quark to a 10% accuracy. The extracted Sivers and pretzelocity asymmetries will provide important information to understand the correlations between the quark orbital angular momentum and the nucleon spin and between the quark spin and nucleon spin.
Author | : John A Gracey |
Publisher | : World Scientific |
Total Pages | : 774 |
Release | : 2001-02-22 |
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ISBN | : 9814542717 |
Download Deep Inelastic Scattering - Proceedings Of The 8th International Workshop Book in PDF, ePub and Kindle
This volume focusses on four main topics: structure functions, tests of quantum chromodynamics, physics at the highest Q2 and p2T, and high energy scattering and diffraction. Comprehensive review articles on hadronic and photon structure, lepton-parton and parton-parton physics as well as future experimental opportunities are presented, together with a special lecture on HERA's legacy after the first decade of operation.
Author | : Erhard Steffens |
Publisher | : Springer Science & Business Media |
Total Pages | : 273 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 9401001650 |
Download Spin Structure of the Nucleon Book in PDF, ePub and Kindle
A comprehensive survey of the most recent results from the field of quark-gluon structure of the nucleon, in particular how the spin of the nucleon is shared by its constituents. After very intriguing results from CERN and SLAC at the end of the 1980s, the last decade has seen a set of second-generation experiments at high energy accelerators that have yielded precise information on the solution of the 'Spin Crisis' - as well as opening up new questions. The articles are written by experts from the leading collaboration and theory groups as well as providing an expert summary of the state of the art, the book points the way to future research directions. Its main focus is on semi-inclusive and exclusive measurements of deep inelastic lepton scattering, which enables for the first time the determination of the flavor-separated quark spin distributions. Future developments on generalized parton distributions and their interpretation as well as the transverse spin structure are also covered. An indispensable volume for all working in hadronic physics.
Author | : Yousef I. Makdisi |
Publisher | : American Institute of Physics |
Total Pages | : 1198 |
Release | : 2003-09-04 |
Genre | : Science |
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Download SPIN 2002 Book in PDF, ePub and Kindle
The SPIN 2002 Proceedings describe the recent advances in the field of spin physics. The topics cover research in high energy and nuclear physics and the study of the nuclear spin structure. The symposium also covers advances in polarized proton and electron acceleration and storage as well as polarized ion sources and targets. The first measurement of spin physics observables in pp collisions at center of mass energy of 200 Gev was announced at this symposium.
Author | : Vitaly Zagrebelnyy |
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Total Pages | : 123 |
Release | : 2015 |
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Download Investigation of Transverse-momentum-dependent Functions(TMD) in Azimuthal Spin Asymmetries of Semi-inclusive Deep Inelastic Nucleon Scattering Book in PDF, ePub and Kindle
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Release | : 2014 |
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Download Measurement of the Target-Normal Single-Spin Asymmetry in Deep-Inelastic Scattering from the Reaction 3He{uparrow}(e, E')X. Book in PDF, ePub and Kindle
We report the first measurement of the target single-spin asymmetry in deep-inelastic scattering from the inclusive reaction 3He{uparrow}(e, e')X on a 3He gas target polarized normal to the lepton plane. Assuming time-reversal invariance, this asymmetry is strictly zero in the Born approximation. The experiment, conducted at Jefferson Lab using a 5.89 GeV electron beam, covers a range of 1.7W
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Total Pages | : 4 |
Release | : 2001 |
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Download Single Spin Azimuthal Asymmetries in Electroproduction of Neutral Pions in Semi-inclusive Deep Inelastic Scattering Book in PDF, ePub and Kindle