Longitudinal Spin Transfer of LAMBDA and LAMBDA-bar Hyperons in Polarized Proton-Proton Collisions at sq root(s) = 200 GeV

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

DOI:https://doi.org/10.1063/1.3215732· OSTI ID:21344418

Sichtermann, Ernst ^[1]

---

1. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States)

The longitudinal spin transfer D{sub LL} of LAMBDA and LAMBDA-bar hyperons produced with large transverse momenta P{sub T} in polarized proton-proton collisions is sensitive to the helicity distribution functions of strange quarks and anti-quarks, and to polarized fragmentation functions. This contribution reports a measurement of the longitudinal spin transfer D{sub LL} in the inclusive production of LAMBDA and LAMBDA-bar hyperons at central rapidities in polarized proton-proton collisions at a center of mass energy of sq root(s) = 200 GeV. The data were collected with the STAR experiment at RHIC and correspond to a approx =3 pb{sup -1} luminosity and a approx =50% beam polarization.

• OSTI ID: 21344418
• 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
ACCELERATORS
ANGULAR MOMENTUM
ANTIBARYONS
ANTIHYPERONS
ANTILAMBDA PARTICLES
ANTIMATTER
ANTIPARTICLES
BARYON-BARYON INTERACTIONS
BARYONS
BEAMS
BROOKHAVEN RHIC
COLLIDING BEAMS
DISTRIBUTION FUNCTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FUNCTIONS
GEV RANGE
HADRON-HADRON INTERACTIONS
HADRONS
HEAVY ION ACCELERATORS
HELICITY
HYPERONS
INCLUSIVE INTERACTIONS
INTERACTIONS
LAMBDA BARYONS
LAMBDA PARTICLES
LINEAR MOMENTUM
MATTER
MEASURING INSTRUMENTS
MULTIPARTICLE SPECTROMETERS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE IDENTIFICATION
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PARTICLE RAPIDITY
POLARIZATION
POLARIZED BEAMS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
QUARK-ANTIQUARK INTERACTIONS
QUARKS
S QUARKS
SPECTROMETERS
SPIN
STORAGE RINGS
STRANGE PARTICLES
TRANSVERSE MOMENTUM