Longitudinal Double Spin Asymmetry In Inclusive Jet Production Atstar
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Author | : STAR Collaboration |
Publisher | : |
Total Pages | : |
Release | : 2006 |
Genre | : |
ISBN | : |
Download Longitudinal Double Spin Asymmetry in Inclusive Jet Production AtSTAR. Book in PDF, Epub and Kindle
This contribution reports on the first measurement of the longitudinal double-spin asymmetry A{sub LL} for the inclusive production of jets in polarized proton-proton collisions at {radical}s = 200 GeV. The data were collected with STAR at RHIC in the years 2003 and 2004, and correspond to a sampled integrated luminosity of 0.3 pb{sup -1} with beam polarizations up to 45%. The results on A{sub LL} cover jet transverse momenta 5
Author | : Daniel L. Olvitt |
Publisher | : |
Total Pages | : 147 |
Release | : 2017 |
Genre | : |
ISBN | : |
Download Measurement of the Longitudinal Double Spin Asymmetry for Dijet Production in Polarized Proton+Proton Collisions at Sqrt(s) Book in PDF, Epub and Kindle
Understanding what contributes to the intrinsic angular momentum (spin) of the proton has been a major goal of the nuclear physics community. In the 1980s, it was discovered that quarks contribute 30% to the spin of the proton. This information led to a search to find other contributions to the spin of the proton. At STAR, the double spin asymmetry (ALL) is measured as it is sensitive to the polarized gluon distribution (Dg(x)). The STAR 2009 inclusive jet ALL at sqrt(s) = 200 GeV has been incorporated into two independent global fits. These fits show for the first time a statistically significant non-zero gluon contribution to the spin of the proton in the parton momentum fraction range x > 0.05. Dijet ALL is also measured at STAR. Dijets are advantageous since the parton momentum fraction (x) of the initial partons may be reconstructed to first order from final state measurements. In 2013 STAR collected an estimated 250 pb-1 of data at sqrt(s) = 510 GeV. The higher center of mass energy will allow STAR to probe Dg(x) at x values as low as 0.02. The large statistics will allow a reduction in the uncertainties. Once the data is incorporated into future global fits, it will allow for a more precise determination of Dg(x). The 2013 dijet ALL results will be presented. The results show good agreement with both global fits and previous STAR results dijet measurements.
Author | : Ryan Pagel Loving |
Publisher | : |
Total Pages | : 82 |
Release | : 2019 |
Genre | : Particle acceleration |
ISBN | : |
Download Measuring Longitudinal Double-spin Asymmetry and Approximating Dilution Factor Using Deep Inelastic Scattering Data Book in PDF, Epub and Kindle
Author | : Polina Kravchenko |
Publisher | : |
Total Pages | : 169 |
Release | : 2010 |
Genre | : |
ISBN | : |
Download The Final Inclusive and Semi-inclusive Longitudinal Double-spin Asymmetries at HERMES Book in PDF, Epub and Kindle
Author | : Maxime Levillain |
Publisher | : |
Total Pages | : 0 |
Release | : 2015 |
Genre | : |
ISBN | : |
Download Double Longitudinal Spin Asymmetries in Single Hadron Photoproduction at High PT at COMPASS Book in PDF, Epub and Kindle
Author | : |
Publisher | : |
Total Pages | : 11 |
Release | : 2001 |
Genre | : |
ISBN | : |
Download Double Spin Asymmetry in the Cross Section for Exclusive _r63_1hn0 [rho 0] Production in Lepton Proton Scattering Book in PDF, Epub and Kindle
Author | : E. A. Andreeva |
Publisher | : |
Total Pages | : 15 |
Release | : 1997 |
Genre | : |
ISBN | : |
Download The Scaling Hypotheses for Single Spin Asymmetry in Inclusive Hadron Production Book in PDF, Epub and Kindle
Author | : F. YUAN |
Publisher | : |
Total Pages | : 4 |
Release | : 2006 |
Genre | : |
ISBN | : |
Download UNIQUE DESCRIPTION FOR SINGLE TRANSVERSE SPIN ASYMMETRIES IN DIS AND HADRONIC COLLISIONS. Book in PDF, Epub and Kindle
We derive a unique formula for the single-transverse-spin asymmetry in semi-inclusive hadron production in deep inelastic scattering, valid for all transverse momentum region. Based on this, we further study the integrated asymmetry weighted with transverse-momentum. They can be evaluated in terms of the twist-three quark-gluon correlation functions, which are responsible for the single spin asymmetry in single inclusive hadron production in hadronic collisions. By using the fitted twist-three functions from the hadronic collision data, we find a consistent description for SSAs in deep inelastic scattering. This demonstrates that we have a unique picture for SSAs in these two processes, and shall provide important guidelines for future studies.
Author | : Kenichi Imai |
Publisher | : American Inst. of Physics |
Total Pages | : 1196 |
Release | : 2007-07-02 |
Genre | : Science |
ISBN | : |
Download Proceedings of the 17th International Spin Physics Symposium Book in PDF, Epub and Kindle
Getting down to the bottom line is what this proceedings digest is all about, as any physicist will tell you: spin is the fundamental concept in physics. The applications are pretty universal due to the fact that, using spin-related phenomena, physicists are trying to reveal the fundamental principles of nature – and things don’t come much more bottom-line than that. This volume is the proceedings of the 17th International Spin Physics Symposium which is a forum to discuss spin physics and related topics.
Author | : Donald G. Crabb |
Publisher | : American Inst. of Physics |
Total Pages | : 1236 |
Release | : 2009-08-25 |
Genre | : Science |
ISBN | : 9780735406865 |
Download Spin Physics Book in PDF, Epub and Kindle
The topics covered in the conference ranged from the physics that can be done with polarized beams of particles (protons, electrons, gamma-rays, etc.) to the techniques and instrumentation necessary to achieve this. Topics included: nucleon structure measurements (from where does the spin of the proton and neutron come), the acceleration, storage and polarization of particle beams and the polarized targets and sources necessary for mounting the experiments.