Inclusive Cross Section and Double Helicity Asymmetry for {pi}0 Production in p+p Collisions at s = 62.4 GeV
- University of Colorado, Boulder
- ORNL
- Lawrence Livermore National Laboratory (LLNL)
- University of Tennessee, Knoxville (UTK)
The PHENIX experiment presents results from the RHIC 2006 run with polarized p+p collisions at sqrt(s)=62.4 GeV, for inclusive {pi}{sup 0} production at midrapidity. Unpolarized cross section results are measured for transverse momenta p{sub T}=0.5 to 7 GeV/c. Next-to-leading order perturbative quantum chromodynamics calculations are compared with the data, and while the calculations are consistent with the measurements, next-to-leading logarithmic corrections improve the agreement. Double helicity asymmetries A{sub LL} are presented for p{sub T}=1 to 4 GeV/c and probe the higher range of Bjorken x of the gluon (x{sub g}) with better statistical precision than our previous measurements at sqrt(s)=200 GeV. These measurements are sensitive to the gluon polarization in the proton for 0.06<x{sub g}<0.4.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 946767
- Journal Information:
- Physical Review D, Vol. 79, Issue 1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Cross sections and double-helicity asymmetries of midrapidity inclusive charged hadrons in p+p collisions at $ \sqrt{s}=62.4 $ GeV
Event structure and double helicity asymmetry in jet production from polarized p+p collisions at (sq rt) s = 200 GeV