Comments on the physics working group

["Curtis A. Meyer" <cmeyer@ernest.phys.cmu.edu>]

Dear Ryan and Joe -

   thanks for getting things going yesterday with the meeting.
I wanted to add a few additional comments. First, with regard
to high-impact channels, my feeling has always been that 
in addition to the pi1, some of the spin-2 states are also high
on  my list:

For the pi1:
 
[1]   gamma p -> p pi_1[0]
[2]   gamma p -> n pi_1[+]

   decays:   3pions:  [1] pi+ pi- pi0 ; [2] pi+ pi+ pi- and pi+ pi0 pi0
                 b1 pi:    [1] b1+ pi- + cc ; [2] b10 pi+
                 f1 pi:     [1] f1 pi0; [2] f1 pi+

for the h2:
[1]   gamma p -> p h2

    decays:  [1] b1+pi- +cc, b10,pi0, rho+pi- + cc, rho0 pi0

for the b2:
[1] gamma p -> p b2[0]
[2] gamma p -> n b2[+]

    decays [1] b2 -> a2+ pi - + cc ; [2] b2[+] -> a2[+]pi0 + a2[0]pi+

This tends to indicate that the 3pi and the b1pi final states are probably 
our highest impact channels. Thus:

    p pi+ pi- pi 0 
    n pi+ pi+ pi- 
    n pi+ pi0 pi0

    p b1[+] pi-  -> p omega pi+ pi- 
    p b1[0] pi0 -> p omega pi0 pi0
    n b1[0] pi+ -> n omega pi0 pi+


I also have a number of articles that people might find useful linked to my web site
at:

  http://www.curtismeyer.com/articles

 -- curtis
-- 
Professor Curtis A. Meyer        Department of Physics
Phone:  (412) 268-2745          Carnegie Mellon University
Fax:    (412) 681-0648            Pittsburgh PA 15213-3890
cmeyer@ernest.phys.cmu.edu  http://www.curtismeyer.com/