Measurements of ΔG | Zendy

G.K. Mallot | Zendy

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Measurements of ΔG

Author(s) -

G.K. Mallot

Publication year - 2007

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.2750788

Subject(s) - physics , particle physics , nucleon , hadron , gluon , lepton , context (archaeology) , nuclear physics , jet (fluid) , scattering , collider , charm (quantum number) , spin (aerodynamics) , production (economics) , scaling , quark , paleontology , thermodynamics , geometry , macroeconomics , mathematics , optics , economics , biology , electron

Our present information on the gluon polarisation Delta g/g is reviewed. Thedata from fixed-target lepton-nucleon experiments are in context with therecent data from the RHIC polarised pp collider. The main tools to study Deltag/g in lepton-nucleon scattering are scaling violations of the g_1 structurefunctions and longitudinal spin asymmetries in hadron production. Results fromhigh-p_T hadron pairs, inclusive hadrons as well as open-charm production arediscussed. At RHIC the most precise data presently came from inclusive pi^0 andjet production. All data indicate that the gluon polarisation is small comparedto earlier expectations, but still can make a major contribution to the nucleonspin.Comment: Proceedings for SPIN2006, Kyot

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