[Clas12_verystrange] Resolved Omega- issue

[Michael Dugger]

Lei,

It has been resolved. I now agree with Derek's results.

-Michael

On Fri, 24 Feb 2012, Lei Guo wrote:

> 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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>>>
>>>
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