[Clas12_verystrange] Resolved Omega- issue

[Lei Guo]

I suppose then I should not add your plot to the talk (The huge Omega  
on a background that I questioned about what the background is) until  
it is resolved?

Lei
On Feb 24, 2012, at 3:06 PM, Michael Dugger wrote:

>
>
> I'll give that a shot.
>
> -Michael
>
> On Fri, 24 Feb 2012, Derek Glazier wrote:
>
>> Hi Mike,
>>  The consistency is good now at least. And if you detect the K- too  
>> the
>> situation is actually quite promising as the background seems to be  
>> entirely
>> suppressed by a vertex cut.
>> Cheers
>> Derek
>>
>> On 02/24/12 19:42, Michael Dugger wrote:
>>>
>>> Hi,
>>>
>>> I have now found the answer to my original question as to whether  
>>> my Omega
>>> plot looked reasonable.
>>>
>>> The problem: The cross section weighting for the Omega- was too  
>>> large when
>>> I simply scaled the neutral cascade cross section by 1/10. The  
>>> effective
>>> cross section I reported earlier was measured after the detection
>>> efficiency, so it was just dumb luck that the effective cross  
>>> section ended
>>> up near the value that we wanted BEFORE the simulated detector  
>>> response.
>>>
>>> I put in 0.3 nb for the Omega- cross section (as Igor requested)  
>>> and got
>>> the plot attached (OmegaMNew.gif).
>>>
>>> The bad news: The Omega- signal I get is consistent with Derek's  
>>> and is a
>>> sad little guy :(
>>>
>>> Take care,
>>> Michael
>>>
>>>
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>>> https://mailman.jlab.org/mailman/listinfo/clas12_verystrange
>>
>>
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