Yes-- but the single K+ model only ever produces a single strange 
hadron, the K+ -- never any strange baryons.  The "associated 
production" that you're discussing below is a quantum mechanically 
distinct process whose diagrams never interfere with single kaon except 
by FSI (which we treat independently anyway).

-Jeremy

On 6/17/19 3:41 PM, Constantinos Andreopoulos wrote:
> There is double counting in "single-Kaon" production.
> 
> Yes, AGKY simulates only \Delta S = 0 but, if I recall correctly, 
> sometimes this means producing a "single K+" (u \bar{s}) together with a 
> strange baryon such as \Lambda (uds), \Sigma^{+} (uus), or \Sigma^{-} 
> (dds).  \Delta S = 0 does not necessarily mean K+ K-.
> 
> Single Kaon deployment in a tune is a long way off:
> Nowhere near a nubar implementation or near an implementation of the new 
> hadronization retune.
> 
> cheers
> Costas
> 
> --
> *Professor Costas Andreopoulos, */FHEA/
> /Chair of Experimental Particle Physics/
> University of Liverpool & STFC / RAL
> http://costas.andreopoulos.eu
> 
> 
>> On 17 Jun 2019, at 19:58, Dytman, Steven A <[log in to unmask] 
>> <mailto:[log in to unmask]>> wrote:
>>
>> Just to be clear, Hugh Gallagher made statement that singleK was double
>> counting some time ago and I believe that was the genesis of leaving 
>> it out
>> of any tune.  I don't know correctness of the assertion, was just 
>> repeating
>> statement of someone more expert than me.
>>
>> Steve
>>
>> On 6/17/2019 2:52 PM, Jeremy Wolcott wrote:
>>> Hi Marco,
>>>
>>> Just following up on the conversation we had on Slack:
>>>
>>> Deployment in a tune is impossible for essentially two reasons:
>>>  * There is a potential double counting issue with other models
>>>
>>> I don't think Steve D's statement on Slack that it duplicates what's
>>> in AGKY is correct.  Single kaon production is a different process
>>> than the one that occurs in hadronization---if my memory serves
>>> correctly, AGKY hadronization always has DeltaS == 0, and the single
>>> kaon model that was implemented is a Cabibbo-suppressed DeltaS == 1
>>> process.  (FWIW, the GENIE manual says only "strange particle pairs"
>>> and "associated production" in the section on AGKY, in sec 2.4; that
>>> process is DeltaS==0.)
>>>
>>> I think the only double-counting that would happen is where some other
>>> component(s) of the total cross section would need to be rescaled
>>> downward to match the inclusive data.  But this would naturally happen
>>> within the tuning procedure anyway, so I don't think this precludes it
>>> being in a tune.  It just means that we can't stick it in on top of an
>>> already tuned CMC.
>>>
>>> So I suggest dropping the part about double-counting.  The real
>>> problem here is the missing antineutrino piece.
>>>
>>> -Jeremy
>>>
>>> On 6/13/19 11:03 AM, Marco Roda wrote:
>>>> Hi all,
>>>>
>>>> I've prepared a draft for the slides for next forum.
>>>>
>>>> The dedicated docdb entry is
>>>> https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgenie-docdb.pp.rl.ac.uk%2Fcgi-bin%2FDisplayMeeting%3Fconferenceid%3D17&amp;data=02%7C01%7Cdytman%40PITT.EDU%7C05c331d81404406e661a08d6f354fc14%7C9ef9f489e0a04eeb87cc3a526112fd0d%7C1%7C0%7C636963943661392640&amp;sdata=R3%2BcFSie1YmSAYgh12sCAG02t2k%2BWhd5lOOi4urL%2Bvw%3D&amp;reserved=0
>>>>
>>>>
>>>> Please let me know if we have comments.
>>>>
>>>> As suggested by Hugh, some time will be dedicated to a feedback
>>>> session.
>>>>
>>>> I announced it last time, suggesting to send email to me in preparation
>>>> for the session.
>>>> I didn't receive anything, still I plan a session with whoever is going
>>>> to connect.
>>>>
>>>> I will also remind this one I send the reminder next monday.
>>>>
>>>> Cheers,
>>>> Marco
>>>>
>>>
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>>
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