Status and Prospects of Di-jet Production in High-energy Polarized Proton-Proton Collisions at RHIC at {radical}(s) = 200 GeV

Journal Article · Tue Aug 04 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3215671· OSTI ID:21316935

Surrow, Bernd ^[1]

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1. Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139 (United States)

The STAR experiment at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory (BNL) is carrying out a spin physics program colliding transversely or longitudinally polarized proton beams at {radical}(s) = 200-500 GeV to gain deeper insight into the spin structure and dynamics of the proton. These studies provide fundamental insight into Quantum Chromodynamics (QCD). One of the main objectives is the determination of the polarized gluon distribution function, {delta}g, through the measurement of the longitudinal double-spin asymmetry, A{sub LL}, for various processes. Inclusive hadron and jet production from polarized pp collision data collected so far at {radical}(s) = 200 GeV using the STAR detector at RHIC have placed important constraints on {delta}g. Di-jet production provides direct access to the initial parton kinematics at leading order (LO) QCD and thus provides sensitivity to the Bjorken-x dependence of {delta}g. The status of the mid-rapidity di-jet cross section analysis from the 2005 RHIC run and the longitudinal double-spin asymmetry at mid-rapidity for the 2006 data sample are discussed in these proceedings. Projections on future di-jet measurements at STAR are provided.

• OSTI ID: 21316935
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1149; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BROOKHAVEN RHIC
COLLIDING BEAMS
CROSS SECTIONS
DISTRIBUTION FUNCTIONS
GEV RANGE
GLUONS
JET MODEL
MULTIPARTICLE SPECTROMETERS
MULTIPLE PRODUCTION
PARTICLE IDENTIFICATION
PARTICLE RAPIDITY
POLARIZATION
POLARIZED BEAMS
PROTON BEAMS
PROTON-PROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
SPIN