PARITY EXPERIMENTS IN HALL A

maintained by Robert Michaels rom@jlab.org last updated 10-May-2009

This file: hallaweb.jlab.org/parity

See also the HAPPEX Web Page for the HAPPEX collaboration, which is doing HAPPEX-III, PREX, and PVDIS.

The parity physics program in Hall A at Jefferson Lab includes the following parity violation proposals:

HAPPEX III [e05109] the high Q² HAPPEX point (Scheduled start: Aug 2009).
HAPPEX II [e99115] (proposal in postscript) -- a low Q² continuation of the Hall A Parity Experiment to study strangeness in the proton. (Status: Completed, published. Ran in 2004 and 2005)
The low Q² He4 parity experiment [e00114] proposal (postscript) or the same in pdf format. (Status: Completed, A rating, published. Ran in 2004 and 2005.
²⁰⁸Pb Radius Experiment (PREX -- e06002). (Status: Re-approved after jeopardy, 2006, A rating. Scheduled start: March 2010)
The E05-007 experiment for PVDIS -- deep inelastic scattering at 6 GeV. (Will run in Fall 2009.)
The high Q² He4 parity proposal (postscript) or the same in pdf format. (Status: Deferred in Jan 2001.)
Pion Photoproduction which aims to measure the weak coupling hpinn. (Status: Deferred in Jan 2001.)
Res-Parity : Parity Violation in the Resonance Region. (Status: Deferred 3 times.)
A high-Q² Parity proposal PR-06-002 at PAC29 (Deferred).
There has also been some discussion about parity for the 12 GeV upgrade, some of which made it into the draft CDR. Here is the specific section about DIS parity written by Paul Reimer et.al. from Argonne.

Additional resources:

Happex Collaboration meetings notes :
- Dec 1, 2006.
- May 17, 2007.
- Local meeting minutes focused on preparations at JLab.
HAPPEX archival paper K.A. Aniol et al., Phys. Rev. C 69, 065501 (2004). postscript and PDF format.
The OFFICIAL HAPPEX Collaboration Web Page.
Announcements of general interest for Hall A parity should be sent to e-mail list halla_parity@jlab.org whose messages are archived here.. Here are instructions on how to subscribe to the list.
Here is the HAPPEX electronics logbook: HAPPEX E-log from 1999 run. (no 1998 E-log)
Some links for experiments related to Hall A program.
Our ROOT/C++ analysis package ``Pan'' (Parity Analyzer).
Writeup about HAPPEX Q² measurements in various years: