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1 /18 Daniel Jumper University of Illinois at Urbana-Champaign For the PHENIX collaboration CIPANP – Vail, CO – May 23, 2015
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2 /18 Proton Spin Daniel Jumper - PHENIX W Physics 5/23/2015
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3 /18 Accessing Sea Quark Spin Daniel Jumper - PHENIX W Physics 5/23/2015
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4 /18 Flavor Sensitivity at Forward Rapidity Proton Constituent Probability Distributions Daniel Jumper - PHENIX W Physics 5/23/2015
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5 /18 Spin at RHIC Daniel Jumper - PHENIX W Physics 5/23/2015
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6 /18 Spin at RHIC Daniel Jumper - PHENIX W Physics 5/23/2015
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7 /18 PHENIX W Measurements Daniel Jumper - PHENIX W Physics 5/23/2015
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8 /18 PHENIX W Measurements Daniel Jumper - PHENIX W Physics 5/23/2015
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9 /18 PHENIX W Measurements Daniel Jumper - PHENIX W Physics 5/23/2015
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10 /18 Daniel Jumper - PHENIX W Physics 5/23/2015
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11 /18 Run 13 final result just released! Now available on arXiv: http://arxiv.org/pdf/1504.07451v1.pdf http://arxiv.org/pdf/1504.07451v1.pdf Daniel Jumper - PHENIX W Physics 5/23/2015
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12 /18 Daniel Jumper - PHENIX W Physics 5/23/2015 Challenge: Low signal with dominant background
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13 /18 Daniel Jumper - PHENIX W Physics 5/23/2015
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14 /18 Daniel Jumper - PHENIX W Physics 5/23/2015
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15 /18 Daniel Jumper - PHENIX W Physics 5/23/2015
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16 /18 Analysis Strategy: Select High-Signal Data Subset Multivariate Likelihood Ratio Calculation Characterize Remaining Data Signal to Background Ratio Fit Use simulations to estimate distributions for components Calculate & Correct Asymmetry Count yields for each helicity Apply correction factors (Sig/Bkg ratio, efficiencies, …) Likelihood Ratio Background Signal Sig Bkg Daniel Jumper - PHENIX W Physics 5/23/2015
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17 /18 Preliminary Result Currently moving toward a finalized result and publication Daniel Jumper - PHENIX W Physics 5/23/2015
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18 /18 Summary Daniel Jumper - PHENIX W Physics 5/23/2015
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19 /18 Backup Daniel Jumper - PHENIX W Physics 5/23/2015
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