Re: [Brahms-dev-l] spectra from pp collsion at eta = 2.2

From: Ian Bearden <bearden@nbi.dk>
Date: Fri Dec 12 2003 - 04:49:55 EST
HI Ramiro, Zhongbao,
Thanks for the plots.
I have a bit of difficulty judging the quality/consistency of these two 
results on the scale shown.
Can one of you make a figure showing the ratio of the two results on a 
linear scale? Maybe it is best to compare each of them to Hijing so we 
can see where they are different.  Also, how is it that the statistics 
are so different? I guess ZBY has more by more than an order of 
magnitued, can that be right??  And...why is the ZBY result so much 
nicer at low pt?  Is this because ZBY uses different acceptance maps? 
(have I understood correctly that ZBY uses the "old" maps for Au+Au, 
and if they really are only based on geometry why should there be a 
difference?)
Cheers,
Ian

On 11/12-2003, at 16.47, Ramiro Debbe wrote:

> Zhongbao,
> Here is the plot where I include your results:
>
> <pp12WithZhongbao.gif>
>
> Let me say it again, as we are working on the same spectra we should
> compare our methods in great detail.
>
> Ramiro
>
> On Thursday, December 11, 2003, at 10:24 AM, yin.zhongbao@fi.uib.no 
> wrote:
>
>> On Thu, 11 Dec 2003, Ramiro Debbe wrote:
>>
>>> Sorry, I rushed to reply and forgot to be more specific.
>>> The blue stars are hijing min bias (I'm working on a better 
>>> simulation
>>> that includes the condition that INEL counters should be hit at least
>>> once on each side)
>>> The red squares are the result of what I call version 1, and finally
>>> the black triangles are the latest results that I fit to the power 
>>> law.
>>>
>>> We are "frantically" studying our method to extract the pt
>>> distributions, and I would be very curious to see how do you handle 
>>> the
>>> fact that the INEL resolution for the z coordinate of the vertex is
>>> poor (~5cm). Maybe we should have a phone conversation.
>>
>> I haven't thought about that. From your plots, it seems HIJING 
>> decribes
>> our data. Then I would leave it as it is since there are many things
>> waiting for me to work on.
>>
>> Best regards,
>> Zhongbao
>> -----------------------------------------------------
>> Zhongbao YIN                 Phone:  +47-55-582792 (O)
>> Address:                             +47-55-276803 (H)
>>   Fantoftveien 14G 466       E-mail:
>>   5075  Bergen                  Yin.Zhongbao@fi.uib.no
>> ------------------------------------------------------
>>
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Received on Fri Dec 12 04:50:28 2003

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