Re: diffusion 2

[Bernhard Lauss <lauss@berkeley.edu>]

Thanks, we have agreed on that topic.

However, my presently largest GEANT problem is,
that the lifetime fits all show a large chi2
of 2 after processing and stepping this
problem back I think it gets generated
somwhere witin GEANT where the electron hit
time is created. I tried to find this since
yesterday, but without luck.
Therfore I am not sure that the impact cuts which
are resulting from GEANT make much sense when the
fits hwos such a bad chi2.
However the lifetime does not seem to be off.
I was looking for multiple counting etc.

anyway other wise the
mup scatteing works and at first
glance with low statistics does not show
a larger effect than with no diffusion at all.

			best regards
				Bernhard



*******************************************************************
Bernhard Lauss                 E-Mail: lauss@socrates.berkeley.edu
Physics Department
366 LeConte Hall
University of California @ Berkeley
Berkeley, CA 94720                             Tel: (510)-642 4057
United States                                  Fax: (510)-642 9811
*******************************************************************

On Thu, 18 Aug 2005, Peter Kammel wrote:

> Dear Bernhard,
>
> I updated my mathematica nb with some numerical estimates.
>
> I drew these numerical estimates into the MC figure (click
> pdf file on the MC link, Tom knows about it).
>
> So  <r> = a sqrt(time)  r in mm and time in us
>
> with a= 0.7 - 1.5 seem to be a reasonable parameter limits.
>
> Regards
>
> Peter
>
> On Tue, 16 Aug 2005, Bernhard Lauss wrote:
>
> >
> >
> > Dear Peter,
> >
> >
> > got it a little wrong first.
> > So the number I wanted to compare is the
> > mean radius of the mu_p distribution
> > and this calculates as
> >
> > <r> = 1.2 sqrt(time)  r in mm and time in us
> >
> >
> > 	thanks
> >           Bernhard
> >
> >
> > *******************************************************************
> > Bernhard Lauss                 E-Mail: lauss@socrates.berkeley.edu
> > Physics Department
> > 366 LeConte Hall
> > University of California @ Berkeley
> > Berkeley, CA 94720                             Tel: (510)-642 4057
> > United States                                  Fax: (510)-642 9811
> > *******************************************************************
> >
>
> Peter Kammel  /  pkammel@uiuc.edu
> Department of Physics, Loomis Laboratory
> University of Illinois at Urbana-Champaign
> 1110 West Green Street, Urbana, IL 61801
> Tel (217) 333-5424 / Fax (217) 333-1215
>
>