Kent Paschke

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.

3
2005 - Online Raw Asymmetry
Helium
ltAgt (ppm) RMS (ppm) Regress Correction
Left 4.38 0.26 1495 0.43 ppm
Right 3.45 0.25 1466 -0.18 ppm
Avg 3.91 0.18 1047 0.12 ppm
Hydrogen
ltAgt (ppm) RMS (ppm) Regress Correction
Left -1.32 0.15 757 0 ppb
Right -1.46 0.16 762 5 ppb
Avg -1.39 0.11 537 3 ppb
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)
GEs0.080GMs s 0.025
GEs0.084GMs s 0.012
NOTE Statistical error only!
Systematic error will likely increase Helium
error bar by lt30, and Hydrogen by lt20
5
Transverse Asymmetry
Helium

• AL AR was large (0.9 ppm)
• PV 3, AT -13 ppm -gt suggests 0.8 ppm
  difference
• Sign is correct!

Hydrogen

• PV lt 2, Aperp -6.5 ppm
• AL AR is small

6
Getting the story out future talks

• JLab Seminar - April 21, 2006?
• First (JLab) release of 2005 results - ltname?gt
• APS _at_ Dallas - April 22-25, 2006 - April
• First public release of 2005 results - Paul
  Souder
• (session chaired by KK)
• PAVI _at_ 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 _at_ Rio Mar - May30-June 3, 2006
• HAPPEX 2005 results Krishna Kumar

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?

8
PREx Preparations Meeting Feb 25, 2006
900 - 930 Paul Task List / Warm Septum
930 - 1000 Bob New Electronics 1000 -
1030 David Compton Upgrade 1030 - 1100 KK
Detector Design 1100 - 1130 Eugene
High-Field Moller 1130 - 1200 Discussion
of other tasks
9
February 24 April 21
Sunday Monday Tuesday Wed Thursday Friday Saturday
24 TODAY 25
26 27 28 1 2 3 Analysis I 4
5 6 7 8 9 10 Analysis II 11
12 13 14 15 16 17 Analysis III 18
19 20 21 22 23 24 Analysis IV 25
26 27 28 29 30 31 Analysis V 1
2 3 4 5 6 7 Analysis VI 8
9 10 11 12 13 14 15
16 17 18 19 20 21 JLAB Seminar? 22
23 24 25 26 27 28 29