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Paper Proposal: Run 9 Dijet Cross Section and Asymmetry
Title: Measurement of the cross section and longitudinal double-spin asymmetry for di-jet production in polarized $pp$ collisions at $\sqrt{s} = 200$ GeV
PA: Brian Page, Scott Wissink, Bernd Surrow, Matt Walker, Dmitry Kalinkin
Target Journal: Physical Review D Rapid Communications (was Physical Review Letters)
Abstract: We report the first measurement of the longitudinal double-spin asymmetry \ALL\ for mid-rapidity di-jet production in polarized \pp\ collisions at a center-of-mass energy of \SQRT{s}\ = 200~GeV. The di-jet cross section was measured and is shown to be consistent with next-to-leading order (\NLO) perturbative \QCD\ predictions. \ALL\ results are presented for two distinct topologies, defined by the jet pseudorapidities, and are compared to predictions from several recent \NLO\ global analyses. The measured asymmetries, the first such correlation measurements, support those analyses that find positive gluon polarization at the level of roughly 0.2 over the region of Bjorken-$x > 0.05$.
Paper Draft:
Responses to Referees:
Analysis Note:
Supplemental Materials:
Presentations:
Proposed Figures:
Figure 1: Data - Simulation comparison
Figure 2: Di-jet cross section
Figure 3: Di-jet Kinematic Reach
Figure 4: Di-jet A_{LL}
PA: Brian Page, Scott Wissink, Bernd Surrow, Matt Walker, Dmitry Kalinkin
Target Journal: Physical Review D Rapid Communications (was Physical Review Letters)
Abstract: We report the first measurement of the longitudinal double-spin asymmetry \ALL\ for mid-rapidity di-jet production in polarized \pp\ collisions at a center-of-mass energy of \SQRT{s}\ = 200~GeV. The di-jet cross section was measured and is shown to be consistent with next-to-leading order (\NLO) perturbative \QCD\ predictions. \ALL\ results are presented for two distinct topologies, defined by the jet pseudorapidities, and are compared to predictions from several recent \NLO\ global analyses. The measured asymmetries, the first such correlation measurements, support those analyses that find positive gluon polarization at the level of roughly 0.2 over the region of Bjorken-$x > 0.05$.
Paper Draft:
- paperDraft_2015-12-18.pdf
- paperDraft_2016-02-26_v0.pdf Draft which includes comments from Spin PWG
- paperDraft_2016-08-04_v5.pdf Final draft from GPC
- paperDraft_2016-10-06_v6.pdf Draft incorporating comments from institutional reviewers
- paperDraft_2016-10-19_v7.pdf Draft incorporating final comments from Norbert Schmitz
- paperDraft_2017-02-22_v11.pdf Draft incorporating responses to referee comments (draft showing changes can be found here)
- paperDraft_2017-04-06_v12.pdf Draft incorporating responses from referees to version submitted to PRD-RC (draft showing changes can be found here)
Responses to Referees:
Analysis Note:
Supplemental Materials:
Presentations:
- Paper Status and Remaining Tasks as of 7/17/2014: Presentation to Spin Group
- Presentation to PWGC Meeting: 8/19/2014
- Presentation of A_LL theory curves: Dmitry to Jet group 10/14/2015
Proposed Figures:
Figure 1: Data - Simulation comparison
Figure 2: Di-jet cross section
Figure 3: Di-jet Kinematic Reach
Figure 4: Di-jet A_{LL}
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