---------- Forwarded message ----------
Date: Mon, 09 Oct 2006 21:43:51 -0700
From: David Lange <[log in to unmask]>
To: Kerstin Tackmann <[log in to unmask]>
Cc: [log in to unmask]
Subject: Re: Question on the differences of the generated D_0*0 shape
between SP6 and SP8 MC
Hi Kerstin
The problem discussed in this thread affects all particles. Depending on
the mass/width/decay mode you are looking at, it may or may not be an
issue. Until October 1, the easiest way was to request mc with a
somewhat modified decay file. Now, the easiest thing is likely to get
some sp8 and look at reweighting.
david
Kerstin Tackmann wrote:
> *** Discussion title: Event Generators
> Email replies to [log in to unmask] must include:
> In-Reply-To: <"/event_gen/498/2/4"@babar-hn.slac.stanford.edu>
> Subject: ...change this to be about your reply.
>
> Hi David,
>
> does this affect only the D_0^*0, or also the D_0^*+?
> Does it affect the other D**?
>
> Our analysis uses SP5 and SP6 - what is our best option
> to get the correct lineshape for the D**?
> Reweighting probably can at most do part of what we
> want because I remember the maximum allowed deviation from
> mean mass is too big for some D** in SP5.
>
> Thanks,
> Kerstin
>
>> Hi Liaoyuan
>>
>> I guess you mean 'between sp6 and sp8' below. As your plot illustrates
>> nicely, some factors were missing in sp5/sp6 lineshapes, in this case,
>> most importantly phase space factors. If you add the appropriate phase
>> space factors to your BW curve, you should get the sp8 curve.
>>
>> david
>>
>
