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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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Presentation on theme: "1 /18 Daniel Jumper University of Illinois at Urbana-Champaign For the PHENIX collaboration CIPANP – Vail, CO – May 23, 2015."— Presentation transcript:

1 1 /18 Daniel Jumper University of Illinois at Urbana-Champaign For the PHENIX collaboration CIPANP – Vail, CO – May 23, 2015

2 2 /18 Proton Spin Daniel Jumper - PHENIX W Physics 5/23/2015

3 3 /18 Accessing Sea Quark Spin Daniel Jumper - PHENIX W Physics 5/23/2015

4 4 /18 Flavor Sensitivity at Forward Rapidity Proton Constituent Probability Distributions Daniel Jumper - PHENIX W Physics 5/23/2015

5 5 /18 Spin at RHIC Daniel Jumper - PHENIX W Physics 5/23/2015

6 6 /18 Spin at RHIC Daniel Jumper - PHENIX W Physics 5/23/2015

7 7 /18 PHENIX W Measurements Daniel Jumper - PHENIX W Physics 5/23/2015

8 8 /18 PHENIX W Measurements Daniel Jumper - PHENIX W Physics 5/23/2015

9 9 /18 PHENIX W Measurements Daniel Jumper - PHENIX W Physics 5/23/2015

10 10 /18 Daniel Jumper - PHENIX W Physics 5/23/2015

11 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

12 12 /18 Daniel Jumper - PHENIX W Physics 5/23/2015 Challenge: Low signal with dominant background

13 13 /18 Daniel Jumper - PHENIX W Physics 5/23/2015

14 14 /18 Daniel Jumper - PHENIX W Physics 5/23/2015

15 15 /18 Daniel Jumper - PHENIX W Physics 5/23/2015

16 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

17 17 /18  Preliminary Result  Currently moving toward a finalized result and publication Daniel Jumper - PHENIX W Physics 5/23/2015

18 18 /18 Summary Daniel Jumper - PHENIX W Physics 5/23/2015

19 19 /18 Backup Daniel Jumper - PHENIX W Physics 5/23/2015


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