208Pb   Radius   Experiment   PREX 

This file: hallaweb.jlab.org/parity/prex 

quick links:    Hall A    HALOG / (legacy HALOG)    HAPPEX   HAPLOG   private docDB    public docDB   wiki

PREX Wiki:   prex.jlab.org 




The Lead Radius Experiment ("PREX"), experiment number E12-11-101, 
uses the parity violating weak neutral interaction 
to probe the neutron distribution 
in a heavy nucleus, namely 208Pb, thus measuring the 
RMS neutron radius to 1% accuracy, which has an 
important impact on nuclear theory.   
Its sister experiment "CREX" (E12-12-004) will use a  48Ca target.
The experiments are being performed by the  
Hall A Parity Collaboration which
has has performed   HAPPEX   and    PVDIS .    Many of our collaborators were also in   Qweak.




  

     
     
  




 ^ Concept of PREX/CREX target area.  Experiments completed in September 2020 ^ 



Index
  
      
  • CREX run plan
      
  • PREX   Wiki
      
  • Document Database   (use JLab CUE login)
      
  • Experimental Readiness Review
    • 
      
  • Proposals and Updates
    • 
      
  • Physics Information
    • 
      
  • Status and Plans 
    • 
      
  • Talks and Meetings
    • 
      
  • Photographs from 2010 Run
    • 

    

     Experimental  Readiness  Review   (ERR) 
      


  •  The 2017  Experimental Readiness Review.    We passed !

  •  The PREX-CREX Design document (v3).   This is our engineering blueprint for what we need.

    

    PROPOSAL   and   UPDATES
    

    

  •   PREX-II   (June 2011)

  •  C-REX   on 48Ca (PAC40)

  •  2005 Proposal Update  (Postscript), and   Same, PDF

  •  2002 Proposal Update 

  •  Original Proposal (Dec 1999) 

    

    

     PREX   PHYSICS   INFO
    

  • 
CREX letter in Phys. Rev. Lett. 129, 042501   July 20, 2022.

  •  CREX press release (Oct 12, 2021)

  •  FOR   THE   PUBLIC   PREX, Simplifed   and   Physics Today article  

  • Talks and Meetings
    • 

  •  Letter about PREX-II data   Phys. Rev. Lett. 126, 172502 (2021).  Published April 27, 2021.

  •  Letter about PREX-I data    Phys. Rev. Lett. 108, 112502 (2012).  Published Mar 15, 2012.

  •  PREX II proposal   for PAC38.     Exp E12-11-101. (Status: approved with A rating in August 2011.)

  •  C-REX Propoal   to do a PREX-style measurement on 48Ca.  Approved by PAC40. 

  •  Article about PREX/CREX   EPJA 50 (2014) 48.

  •  C-REX workshop  (Mar 17-19, 2013)     Group Photo

  •  Letter about Weak FF of Lead   PRC 85, 032501(R) (2012).  Published Mar 26, 2012. 

  •  Letter on A_T   transverse asymmetry measurements on 1H, 4He, 12C, and 208Pb. Published Nov 9, 2012. 

  •  HAMC Monte Carlo simulates parity-violating single-arm HRS experiments PREX, HAPPEX-III, and PVDIS.

  •  Acceptance function needed for theoretical interpretation of our results.

  •  GRC 2012 Poster about PREX (powerpoint).

  •  Paper on Parity Violating Neutron Densities (PDF)    and same (PS)    Phys. Rev. C63, 025501 (2001).   244 citations (inSPIRE, May 2017).

    

  •   PhD and MSc Theses


    

    

    STATUS   and   PLANS
    

    

    

  •  The PREX-CREX Design document (v3).   This is our engineering blueprint for what we need.

  •  The PREX Beam Requirements

  •  A TO DO List for PREX-II and for for CREX

  •  The Attic of older information  : if you're missing something from around 2010, it's probably here.

    

    

    TALKS   and   MEETINGS
     

    

  •  Meetings 


  •  Workshops 


  •  Talks about PREX    including seminars and PAC Defenses

    

    
maintained by   
Robert Michaels     
 rom@jlab.org
  last updated 21-Jul-2022