Re: motivation for tracking resolution

[Elton Smith <elton@jlab.org>]

Sounds good to me.
Curtis: Is this what you/Matt would do anyway?

Cheers,  Elton.



Elton Smith
Jefferson Lab MS 12H5
12000 Jefferson Ave
Suite # 16
Newport News, VA 23606
elton@jlab.org
(757) 269-7625

On Fri, 11 Jan 2008, David Lawrence wrote:

>
>
> Hi Elton,
>
>     One thing you might consider is using the geant simulation to
> directly calculate the covariance matrix at each detector plane. It
> would take very few events and it would seem more realistic than I think
> you can get with the direct calculation since it would include a more
> precise distribution of the materials. One can then combine these to get
> the covariance at the vertex so you essentially get what you need for
> both 1 and 5. Just a thought.
>
> Regards,
> -David
>
> Elton Smith wrote:
> > This morning Curtis, Alex, Mark and I met to think about what parametric
> > studies might be useful to study tradeoffs in resolution for different
> > amounts of material and position resolution.
> >
> > We have the following suggestion:
> > 1. Update the parametric representation for resolution (polynomial
> > fits) that currently exists to one that includes parameters that can be
> > interpreted physically in terms of material and position resolution.
> > 2. Generate a four-pion events with two of the pions representing a narrow
> > resonance with variable mass. Scanning this mass can give us two-pion mass
> > resolution for charged tracks over a range of masses.
> > 3. Generate Phythia events with similar topoly for merging with the
> > "signal" events above to study the effect of signal to background and
> > resoltuion.
> > 4. Alex will start on process 2&3 and Elton and Mark will develop 1 for
> > input into the simulation.
> > 5. CMU will use 1 to generate an error matrix that can be used for
> > kinematic fitting of the same events, and repeat the exercise 3 using
> > kinematic fitting.
> >
> > From there we can work toward including neutrals in the sample to study
> > reconstruction of events with pi+pi-pi0 such as omegas.
> >
> > Comments/suggestions?
> >
> > Elton Smith
> > Jefferson Lab MS 12H5
> > 12000 Jefferson Ave
> > Suite # 16
> > Newport News, VA 23606
> > elton@jlab.org
> > (757) 269-7625
> >
>
> --
>
> ------------------------------------------------------------------------
>   David Lawrence Ph.D.
>   Staff Scientist                 Office: (757)269-5567   [[[  [   [ [
>   Jefferson Lab                   Pager:  (757)584-5567   [  [ [ [ [ [
>   http://www.jlab.org/~davidl     davidl@jlab.org         [[[  [[ [[ [[[
> ------------------------------------------------------------------------
>
>
>