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Article
Double-spin asymmetry of electrons from heavy-flavor decays in p plus p collisions at root s=200 GeV
Physical Review D
Document Type
Article
Disciplines
Publication Version
Published Version
Publication Date
1-29-2013
DOI
10.1103/PhysRevD.87.012011
Abstract
We report on the first measurement of the double-spin asymmetry, A(LL), of electrons from the decays of hadrons containing heavy flavor in longitudinally polarized p + p collisions at root s = 200 GeV for p(T) = 0.5 to 3.0 GeV/c. The asymmetry was measured at midrapidity (vertical bar eta vertical bar < 0.35) with the PHENIX detector at the Relativistic Heavy Ion Collider. The measured asymmetries are consistent with zero within the statistical errors. We obtained a constraint for the polarized gluon distribution in the proton of vertical bar Delta g/g(log(10)(x) = -1.6(-0.4)(+0.5), mu = m(T)(c)vertical bar(2) < 0.030 (1 sigma) based on a leading-order perturbative quantum chromodynamics model, using the measured asymmetry.
Copyright Owner
American Physical Society
Copyright Date
2013
Language
en
File Format
application/pdf
Citation Information
Andrew Adare, Alan Dion, John C. Hill, Todd Kempel, et al.. "Double-spin asymmetry of electrons from heavy-flavor decays in p plus p collisions at root s=200 GeV" Physical Review D Vol. 87 Iss. 1 (2013) p. 012011 - 012011 Available at: http://works.bepress.com/craig-ogilvie/89/
This is an article from Physical Review D 87 (2013): 012011-1, doi:10.1103/PhysRevD.87.012011. Posted with permission.