5 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Correlation Functions"  
Results: 1 - 5
open access

Transverse momentum dependent quark distributions and polarized Drell-Yan processes

Description: We study the spin-dependent quark distributions at large transverse momentum. We derive their transverse momentum behaviors in the collinear factorization approach in this region. We further calculate the angular distribution of the Drell-Yan lepton pair production with polarized beams and present the results in terms of the collinear twist-three quark-gluon correlation functions. In the intermediate transverse momentum region, we find that the two pproaches: the collinear factorization and the… more
Date: September 11, 2009
Creator: Zhou, J.; Yuan, F. & Liang, Z.-T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Mapping the Dark Matter From UV Light at High Redshift: An Empirical Approach to Understand Galaxy Statistics

Description: We present a simple formalism to interpret the observations of two galaxy statistics, the UV luminosity function (LF) and two-point correlation functions for star-forming galaxies at z {approx} 4, 5 and 6 in the context of {Lambda}CDM cosmology. Both statistics are the result of how star formation takes place in dark matter halos, and thus are used to constrain how UV light depends on halo properties, in particular halo mass. The two physical quantities we explore are the star formation duty cy… more
Date: August 3, 2009
Creator: Lee, Kyoung-Soo; Giavalisco, Mauro; Conroy, Charlie; Wechsler, Risa H.; Ferguson, Henry C.; Somerville, Rachel S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Local and average structures of the spin-glass pyrochlore Y2Mo2O7 from neutron diffraction and neutron pair distribution function analysis

Description: The observation of canonical spin-glass behavior in the pyrochlore oxide Y{sub 2}Mo{sub 2}O{sub 7} has been a subject of considerable interest as the original structural studies were interpreted in terms of a well-ordered crystallographic model. It is widely held that the stabilization of the spin-glass state requires some level of positional disorder along with frustration. Recent reports from local probe measurements, extended x-ray-absorption fine structure (EXAFS) and {sup 89}Y NMR, have be… more
Date: January 1, 2009
Creator: Proffen, Thomas Ernst; Kim, Hyunjeong; Greedan, John; Gout, Delphine; Lozano - Gorrin, A D; Derahkshan, Shahab et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Next-to-Leading Order Calculation of the Single Transverse Spin Asymmetry in the Drell-Yan Process

Description: We calculate the next-to-leading order perturbative QCD corrections to the transverse momentum weighted single transverse spin asymmetry in Drell-Yan lepton pair production in hadronic collisions. We identify the splitting function relevant for the scale evolution of the twist-three quark-gluon correlation function. We comment on the consequences of our results for phenomenology.
Date: March 30, 2009
Creator: Vogelsang, Werner & Yuan, Feng
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Lattice QCD in Background Fields

Description: Electromagnetic properties of hadrons can be computed by lattice simulations of QCD in background fields. We demonstrate new techniques for the investigation of charged hadron properties in electric fields. Our current calculations employ large electric fields, motivating us to analyze chiral dynamics in strong QED backgrounds, and subsequently uncover surprising non-perturbative effects present at finite volume.
Date: June 1, 2009
Creator: William Detmold, Brian Tiburzi, Andre Walker-Loud
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen