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Introduction

Introduction. Kent Paschke HAPPEX Collaboration Meeting February 24, 2006. Overview. HAPPEX 2004 Helium: published, PRL 96 (2006) 022003. Hydrogen: submitted and refereed. Give me comments ASAP! Hydrogen Transverse: To Be Completed HAPPEX 2005

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Introduction

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  1. Introduction Kent Paschke HAPPEX Collaboration Meeting February 24, 2006

  2. Overview • HAPPEX 2004 • Helium: published, PRL 96 (2006) 022003. • Hydrogen: submitted and refereed. Give me comments ASAP! • Hydrogen Transverse: To Be Completed • HAPPEX 2005 • Helium/Hydrogen: Runs completed. Data under analysis. • Helium Transverse: under analysis. • HAPPEX-III (2008) • Lead (2008) meeting tomorrow, 9am. Kent Paschke HAPPEX Collaboration Meeting

  3. 2005 - Online Raw Asymmetry Helium Hydrogen Kent Paschke HAPPEX Collaboration Meeting

  4. 2005 - Physics Asymmetry Helium 2004: APV: s ~ 0.21 ppm (3.5%) APV: s ~ 0.84 ppm (11.2%) GEs: s ~ 0.014 GEs: s ~ 0.042 Hydrogen 2004: APV: s ~ 0.24 ppm (17%) APV: s ~ 0.12 ppm (8%) GEs+0.080GMs:s ~ 0.025 GEs+0.084GMs: s ~ 0.012 NOTE: Statistical error only! Systematic error will likely increase Helium error bar by <30%, and Hydrogen by <20% Kent Paschke HAPPEX Collaboration Meeting

  5. Transverse Asymmetry Helium • AL – AR was large (0.9 ppm) • PV ~ 3%, AT ~ -13 ppm -> suggests 0.8 ppm difference • Sign is correct! Hydrogen • PV < 2%, Aperp ~ -6.5 ppm • AL – AR is small Kent Paschke HAPPEX Collaboration Meeting

  6. Getting the story out – future talks • JLab Seminar - April 21, 2006? • First (JLab) release of 2005 results - <name?> • APS @ Dallas - April 22-25, 2006 - April • First public release of 2005 results - Paul Souder • (session chaired by KK) • PAVI @ Milos - May 16-20, 2006 • HAPPEX 2005 results – David Armstrong • Control of Beam Asymmetries- Kent P • Transverse Asymmetry – Lisa K • Q2 and Backgrounds – Bryan M • CIPANP @ Rio Mar - May30-June 3, 2006 • HAPPEX 2005 results – Krishna Kumar Kent Paschke HAPPEX Collaboration Meeting

  7. Future Publications and Technical Notes • Technical “Notes” • Optics/Q2 • Backgrounds • Asymmetry analysis • Polarimetry • Finite acceptance • Beam asymmetries • Cavity performance • Publications • 2005 Hydrogen + Helium measurement - Letter • Helium + Hydrogen Transverse – Letter • Beam Asymmetries NIM (sequel to Humensky/Cates NIM) • HAPPEX-II “long” paper? Kent Paschke HAPPEX Collaboration Meeting

  8. PREx Preparations Meeting Feb 25, 2006 9:00 - 9:30 Paul Task List / Warm Septum 9:30 - 10:00 Bob New Electronics 10:00 - 10:30 David Compton Upgrade 10:30 - 11:00 KK Detector Design 11:00 - 11:30 Eugene High-Field Moller 11:30 - 12:00 Discussion of other tasks Kent Paschke HAPPEX Collaboration Meeting

  9. February 24 – April 21 Kent Paschke HAPPEX Collaboration Meeting

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