Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Measurement Of Non Photonic Electron Cross Section And Double Longitudinal Spin Asymmetry Asubscript Ll In Polarized P P Collisions At Formula
Download Measurement Of Non Photonic Electron Cross Section And Double Longitudinal Spin Asymmetry Asubscript Ll In Polarized P P Collisions At Formula full books in PDF, epub, and Kindle. Read online Measurement Of Non Photonic Electron Cross Section And Double Longitudinal Spin Asymmetry Asubscript Ll In Polarized P P Collisions At Formula ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Measurement of Non-photonic Electron Cross Section and Double Longitudinal Spin Asymmetry, A[subscript LL], in Polarized P + P Collisions at [formula] by : Priscilla Priska Kurnadi
Download or read book Measurement of Non-photonic Electron Cross Section and Double Longitudinal Spin Asymmetry, A[subscript LL], in Polarized P + P Collisions at [formula] written by Priscilla Priska Kurnadi and published by . This book was released on 2010 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Longitudinal Double-spin Asymmetry and Cross Section for Inclusivejet Production in Polarized Proton Collisions at Sqrt(s) by :
Download or read book Longitudinal Double-spin Asymmetry and Cross Section for Inclusivejet Production in Polarized Proton Collisions at Sqrt(s) written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a measurement of the longitudinal double-spinasymmetry A_LL and the differential cross section for inclusivemidrapidity jet production in polarized proton collisions at sqrt(s)=200GeV. The cross section data cover transverse momenta 5
Book Synopsis Measurement of Longitudinal Double Spin Asymmetries of [pi]+/- Production in P[over-arrow] + P[over-arrow] Collisions at [sqrt]s by : Adam Philip Kocoloski
Download or read book Measurement of Longitudinal Double Spin Asymmetries of [pi]+/- Production in P[over-arrow] + P[over-arrow] Collisions at [sqrt]s written by Adam Philip Kocoloski and published by . This book was released on 2010 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spin dependent measurements provide incisive tests for modern theories of particle physics. The discovery that the integral of the quark helicity distribution is much too small to account for the spin of the proton is an excellent case in point. It inspired an intense period of theoretical scrutiny and a new generation of experiments to study [Delta]g, the helicity distribution of gluons in the nucleon. In particular, the unique polarized proton collider at RHIC enables a class of asymmetry measurements that are directly sensitive to gluon polarization. The STAR experiment at RHIC measures the double spin asymmetry A[subscript LL] for a variety of final states in collisions of longitudinally polarized protons in order to constrain [Delta]g. Asymmetries for mid-rapidity charged pion production benefit from large cross sections and the excellent tracking and particle identification capabilities of the STAR Time Projection Chamber. This thesis presents the first measurements of charged pion A[subscript LL] at STAR. The measurements are compared to predictions based on perturbative QCD calculations and from this comparison model-dependent constraints are placed on the integral gluon polarization [Delta]G.
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].
Download or read book רסיסים מהעבר הקרוב written by and published by . This book was released on 1938 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Precision Measurement of the Longitudinal Double-spin Asymmetry for Inclusive Jet Production in Polarized Proton Collisions at {u221A}s by :
Download or read book Precision Measurement of the Longitudinal Double-spin Asymmetry for Inclusive Jet Production in Polarized Proton Collisions at {u221A}s written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a new measurement of the midrapidity inclusive jet longitudinal double-spin asymmetry, ALL, in polarized pp collisions at center-of-mass energy √s = 200 GeV. The STAR data place stringent constraints on polarized parton distribution functions extracted at next-to-leading order from global analyses of inclusive deep-inelastic scattering (DIS), semi-inclusive DIS, and RHIC pp data. Lastly, the measured asymmetries provide evidence at the 3? level for positive gluon polarization in the Bjorken-x region x > 0.05 .
Book Synopsis Measurement of the Longitudinal Double Spin Asymmetry for Dijet Production in Polarized Proton+Proton Collisions at Sqrt(s) by : Daniel L. Olvitt
Download or read book Measurement of the Longitudinal Double Spin Asymmetry for Dijet Production in Polarized Proton+Proton Collisions at Sqrt(s) written by Daniel L. Olvitt and published by . This book was released on 2017 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Longitudinal Double-Spin Asymmetry of Electrons from Heavy Flavor Decays in Polarized P + P Collisions at S = 200 Gev by : Katsuro Nakamura
Download or read book Longitudinal Double-Spin Asymmetry of Electrons from Heavy Flavor Decays in Polarized P + P Collisions at S = 200 Gev written by Katsuro Nakamura and published by . This book was released on 2014-06-30 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis DOUBLE TRANSVERSE SPIN ASYMMETRIES AT NLO. by : A.STRATMANN MUKHERJEE (M.VOGELSANG, W.)
Download or read book DOUBLE TRANSVERSE SPIN ASYMMETRIES AT NLO. written by A.STRATMANN MUKHERJEE (M.VOGELSANG, W.) and published by . This book was released on 2003 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on a next-to-leading order QCD calculation of the cross section and the spin asymmetry for isolated large-p{sub T} prompt photon production in collisions of transversely polarized protons. Corresponding measurements may be used at RHIC to determine the transversity parton distributions of the proton.
Book Synopsis MEASUREMENT OF THE DOUBLE LONGITUDINAL SPIN ASYMMETRY IN INCLUSIVE JET PRODUCTION IN POLARIZED P+P COLLISIONS AT S**ư by :
Download or read book MEASUREMENT OF THE DOUBLE LONGITUDINAL SPIN ASYMMETRY IN INCLUSIVE JET PRODUCTION IN POLARIZED P+P COLLISIONS AT S**ư written by and published by . This book was released on 2005 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present preliminary results for the first measurements of the double longitudinal spin asymmetry A{sub LL} in inclusive jet production at mid-rapidity in polarized proton-proton collisions at √s = 200 GeV. The data amount to ≈ 0.5 pb−1 collected at RHIC in 2003 and 2004 with beam polarizations up to 45%. The jet transverse energies are in the range of 5
Book Synopsis Longitudinal Double Spin Asymmetry for Inclusive Jet Production in Polarized Proton-proton Collisions at [square Root Of] S by : Julie Marie Millane
Download or read book Longitudinal Double Spin Asymmetry for Inclusive Jet Production in Polarized Proton-proton Collisions at [square Root Of] S written by Julie Marie Millane and published by . This book was released on 2008 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the Inclusive Jet Longitudinal Double-Spin Asymmetry for polarized protons at \s = 200 GeV. The data were taken on the STAR experiment at RHIC during the 2005 run period and cover a jet transverse momentum range of 5
Book Synopsis SANE's Measurement of the Proton's Virtual Photon Spin Asymmetry, Ap1, at Large Bjorken X by :
Download or read book SANE's Measurement of the Proton's Virtual Photon Spin Asymmetry, Ap1, at Large Bjorken X written by and published by . This book was released on 2012 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: The experiment SANE (Spin Asymmetries of the Nucleon Experiment) measured inclusive double polarization electron asymmetries on a proton target at the Continuous Electron Beam Accelerator Facility at the Thomas Jefferson National Laboratory in Newport News Virgina. Polarized electrons were scattered from a solid 14NH3 polarized target provided by the University of Virginia target group. Measurements were taken with the target polarization oriented at 80 degrees and 180 degrees relative to the beam direction, and beam energies of 4.7 and 5.9 GeV were used. Scattered electrons were detected by a multi-component novel non-magnetic detector package constructed for this experiment. Asymmetries measured at the two target orientations allow for the extraction of the virtual Compton asymmetries A1p and A2p as well as the spin structure functions g1p and g2p. This work addresses the extraction of the virtual Compton asymmetry A1p in the deep inelastic regime. The analysis uses data in the kinematic range from Bjorken x of 0.30 to 0.55, separated into four Q2 bins from 1.9 to 4.7 GeV2.
Book Synopsis Charged-pion Cross Sections and Double-helicity Asymmetries in Polarized P+p Collisions at S by :
Download or read book Charged-pion Cross Sections and Double-helicity Asymmetries in Polarized P+p Collisions at S written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, we present midrapidity charged-pion invariant cross sections, the ratio of the ?- to ?+ cross sections and the charge-separated double-spin asymmetries in polarized p+p collisions at s=200 GeV. While the cross section measurements are consistent within the errors of next-to-leading-order (NLO) perturbative quantum chromodynamics predictions (pQCD), the same calculations overestimate the ratio of the charged-pion cross sections. This discrepancy arises from the cancellation of the substantial systematic errors associated with the NLO-pQCD predictions in the ratio and highlights the constraints these data will place on flavor-dependent pion fragmentation functions. Lastly, the charge-separated pion asymmetries presented here sample an x range of 0̃.03–0.16 and provide unique information on the sign of the gluon-helicity distribution.
Book Synopsis Charged-pion Cross Sections and Double-helicity Asymmetries in Polarized [math Display by :
Download or read book Charged-pion Cross Sections and Double-helicity Asymmetries in Polarized [math Display written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, we present midrapidity charged-pion invariant cross sections, the ratio of the [pi]- to [pi]+ cross sections and the charge-separated double-spin asymmetries in polarized p+p collisions at s=200 GeV. While the cross section measurements are consistent within the errors of next-to-leading-order (NLO) perturbative quantum chromodynamics predictions (pQCD), the same calculations overestimate the ratio of the charged-pion cross sections. This discrepancy arises from the cancellation of the substantial systematic errors associated with the NLO-pQCD predictions in the ratio and highlights the constraints these data will place on flavor-dependent pion fragmentation functions. Lastly, the charge-separated pion asymmetries presented here sample an x range of ~0.03-0.16 and provide unique information on the sign of the gluon-helicity distribution.
Book Synopsis Dijet Production in Polarized Proton-proton Collisions at [the Square Root of Sigma] by : Matthew Hsing Hung Walker
Download or read book Dijet Production in Polarized Proton-proton Collisions at [the Square Root of Sigma] written by Matthew Hsing Hung Walker and published by . This book was released on 2011 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polarized deep inelastic scattering (DIS) experiments indicate that quarks only carry approximately 30% of the proton spin, which led to interest in measuring the contributions of other components. Through polarized proton-proton collisions at the Relativistic Heavy Ion Collider (RHIC), the world's only polarized proton collider, it is possible to make an extraction of the polarized gluon distribution function [delta]g(x). This function describes the contribution of the gluon polarization to the proton spin. This thesis presents a measurement of the p + p ---> Jet + Jet + X (dijet) cross section from the 2005 RHIC running period and a measurement of the longitudinal double spin asymmetry ALL from the 2009 RHIC running period, both made using the Solenoidal Tracker at RHIC (STAR). The cross section is measured over the invariant mass range 20
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 Longitudinal Double-spin Asymmetry of Forward Neutral Pions from 510 GeV Polarized Proton-proton Collisions at STAR. by : Christopher John Dilks
Download or read book Longitudinal Double-spin Asymmetry of Forward Neutral Pions from 510 GeV Polarized Proton-proton Collisions at STAR. written by Christopher John Dilks and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Longitudinally polarized proton-proton scattering experiments provide access to the gluon polarizationcontribution to the overall proton spin via a measurement of the longitudinal double-spin asymmetry,$A_{LL}$. During RHIC data-taking periods in 2012 and 2013, a significant sample of $\pi^0$s scattered inthe forward direction was acquired from proton-proton collisions with a center-of-mass energy of 510 GeVand beam polarizations of $\sim 55\%$. The $\pi^0$ kinematics were measured by the STAR Forward MesonSpectrometer, an electromagnetic calorimeter spanning a forward pseudorapidity range of $2.5
![Download Measurement of Non-photonic Electron Cross Section and Double Longitudinal Spin Asymmetry, A[subscript LL], in Polarized P + P Collisions at [formula] PDF Online Free](https://books.google.com/books/content/images/frontcover/NWGTkQEACAAJ?fife=w200-h370)
![Download Measurement of Longitudinal Double Spin Asymmetries of [pi]+/- Production in P[over-arrow] + P[over-arrow] Collisions at [sqrt]s PDF Online Free](https://books.google.com/books/content/images/frontcover/fGvpZwEACAAJ?fife=w200-h370)
![Download Longitudinal Double-spin Asymmetry and Cross Section for Inclusive Neutral Pion Production in Polarized Proton Collisions at [the Square Root of Sigma] PDF Online Free](https://books.google.com/books/content/images/frontcover/ZBvxSAAACAAJ?fife=w200-h370)
![Download Longitudinal Double Spin Asymmetry for Inclusive Jet Production in Polarized Proton-proton Collisions at [square Root Of] S PDF Online Free](https://books.google.com/books/content/images/frontcover/MKXvtgAACAAJ?fife=w200-h370)
![Download Dijet Production in Polarized Proton-proton Collisions at [the Square Root of Sigma] PDF Online Free](https://books.google.com/books/content/images/frontcover/GNAgtwAACAAJ?fife=w200-h370)
![Download Neutral Pion Double Helicity Asymmetry in Polarized Proton-Proton Collisions at [the Square Root of Sigma] PDF Online Free](https://books.google.com/books/content/images/frontcover/JPIHlwEACAAJ?fife=w200-h370)
