Double Spin Asymmetry of Electrons from Heavy Flavor Decays in $p+p$ Collisions at $\sqrt{s}=200$ GeV - INSPIRE

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Double Spin Asymmetry of Electrons from Heavy Flavor Decays in $p+p$ Collisions at $\sqrt{s}=200$ GeV

PHENIX

Collaboration

•

A. Adare
(
- Colorado U.
)

Sep, 2012

17 pages

Published in:

Phys.Rev.D 87 (2013) 1, 012011

Published: Jan 29, 2013

e-Print:

1209.3278 [hep-ex]

DOI:

10.1103/PhysRevD.87.012011

Experiments:

BNL-RHIC-PHENIX

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Abstract: (APS)

We report on the first measurement of the double-spin asymmetry, ALL, of electrons from the decays of hadrons containing heavy flavor in longitudinally polarized p+p collisions at s=200 GeV for pT=0.5 to 3.0 GeV/c. The asymmetry was measured at midrapidity (|η|<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 |Δg/g(log⁡10x=-1.6-0.4+0.5,μ=mTc)|2<0.030 (1σ) based on a leading-order perturbative quantum chromodynamics model, using the measured asymmetry.

Note:

385 authors, 17 pages, 15 figures, 5 tables. Submitted to Phys. Rev. D. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

13.85.Ni
13.88.+e
25.75.Dw
14.20.Dh
p p: interaction
polarized beam: longitudinal
heavy quark: decay
electron: yield
spin: asymmetry: measured
PHENIX

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Figures(17)

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