[d2n-analysis-talk] z_react (Offset Corrected)

[David Flay]

Hi all,

So, I've readjusted the matrix elements to the values Jin gave me from the
Transversity study.  Then I adjusted the zeroth order y_fp matrix element,
which corresponds to an offset.  This is seen where, from the Optics
Matrix:

y_tg = Y_{jkl}*th_fp^j*ph_fp^l*y_fp^k

to zeroth order, j = k = l = 0:

y_tg = Y_{000}*th_fp^0*ph_fp^*[y_tr - \sum_i y_{i000}x_fp^i ]

but to zeroth order, we set i = 0.  Therefore, the last term is the offset
we adjust here. The last expression for the y_fp arises from an
investigation of the focal plane coordinates, where y_tr is the
y-coordinate in the transport system.

See the attached plots for the before implementation of Transversity
optics + Survey offsets, and after the implementation and my shift.

Dave

-------------------------------------------------
David Flay
Physics Department
Temple University
Philadelphia, PA 19122

office: Barton Hall, BA319
phone: (215) 204-1331

e-mail: flay at jlab.org
            flay at temple.edu

website: http://www.jlab.org/~flay
              http://quarks.temple.edu
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