Hi,
this is from Adam. There is a mismatch between data and MC at forward
angles, too.
Regards,
Michael
---------- Forwarded message ----------
Date: Wed, 12 Apr 2006 10:50:10 -0400
From: Adam DeGrush <degrush@MIT.EDU>
To: Michael Kohl <kohlm@mit.edu>
Subject: Re: Blast analysis meeting on Wednesday 2006
Here is the latest crunch data for e,e'p theta_e:
THere are no cuts except eL,pR and vice versa. Also red =data, black is mc
Also I am not an authorized poster of ANAWARE so you may have to pass
this along.
Adam
On Apr 12, 2006, at 10:27 AM, Michael Kohl wrote:
> Hi Adam,
>
> can you also compare data and MC yields as a function of theta_e,
> like Eugene did for d(e,e'n)?
>
> Regards,
>
> Michael
>
>
> On Wed, 12 Apr 2006, Adam DeGrush wrote:
>
>> Is it possible but I still see a higher value for the second Q2
>> bin (0.2<Q2<0.3). I will plot again with more bins and see what
>> is the trend.
>> Adam
>>
>> On Apr 11, 2006, at 11:13 PM, Michael Kohl wrote:
>>
>>> Hi,
>>> concluding, it must the tossing volume for the GEn Montecarlo for
>>> which the lower bound may be too tight (Vitaliy?). The same may
>>> apply to the d(e,e'p) MC, Adam? Is this a possible explanation
>>> for hPz being high in the lowest bin?
>>> For those interested in this discussion, read from the bottom.
>>> Best regards,
>>>
>>> Michael
>>> On Tue, 11 Apr 2006, Chi Zhang wrote:
>>>> Dear Michael and Eugene,
>>>> sorry, just got back from NYC.
>>>> Let's not play with technicality, "starts" means useful stuff
>>>> starts. I don't care about the tiny weeny tail at 22. those are
>>>> obviously mis-recon/resolution-spill-overs. convince yourself by
>>>> running an epel MC with theta lower bound set to say 24.5
>>>> degrees and you ll see spills to below 23 and the general shape
>>>> of the tail is well produced. So when we talk about acceptance,
>>>> it starts at ABOVE 24. It is only due to the resolution that we
>>>> start our binning a bit below that. whether or not to go all the
>>>> way down to 22 is your personal call, I don't. even I do, those
>>>> trailing events will not have any impact on any results.
>>>> I do not know what went into the GEN Monte Carlo so I can not
>>>> comment on that.
>>>> But I know that I looked at BOTH hydrogen runs in late 2004 and
>>>> deuterium runs in 2005 and the acceptance starts from 24. and
>>>> the plot you showed is not any bit different than any of the
>>>> theta plot we v been looking at for years.
>>>> If you guys had sit down and spent 1 minute before calling on
>>>> "everyone", You could have really spared me of the heart attack
>>>> I almost had, and I could really have gone to sleep a bit
>>>> earlier last night since I needed to get up 4:30am this morning!
>>>> And I refrain myself from commenting on the way BLAST
>>>> collabroation operates.
>>>> Best regards
>>>> Chi
>>>> On Tue, 11 Apr 2006, Eugene J. Geis wrote:
>>>>> 2 postscripts:
>>>>> 1. mc_real.ps
>>>>> top left -> electron theta from my 2005 D2 data from v17
>>>>> GEN cuts made.
>>>>> top right -> same red curve, e-theta with MC on top
>>>>> GEN cuts made on both
>>>>> bottom left -> electron theta from MC files without xs0 weight
>>>>> GEN cuts applied
>>>>> bottom right -> tml, aka generated e-theta from MC files
>>>>> NO GEN CUTS APPLIED.
>>>>> 2. Theta.ps
>>>>> twl from 2005 v17 data from flr files.
>>>>> QWL==-1 is the ONLY CUT.
>>>>>> I did it, 1 minute and I know that the acceptance starts at 24
>>>>>> degrees
>>>>>> fair and square!
>>>>> What is your definition of "starts"? Cause I did it and I saw
>>>>> it "Start"
>>>>> at 22 and finally have a significant rise at 24. fair and square.
>>>>> MC files were run and crunched by Vitaly a few months ago.
>>>>> I can't find their respective directory. According to v17 flr-
>>>>> files
>>>>> and earlier, data acceptance "STARTS" at 22 but does not become
>>>>> significant until 24. MC "STARTS" at 24 and is not significant
>>>>> until
>>>>> 26 degrees.
>>>>> This is what leads to this claim. I see what the plots look
>>>>> like...
>>>>> -eugene
>>>>> Quoting Chi Zhang <zhangchi@MIT.EDU>:
>>>>>> Hi Michael and Eugene,
>>>>>> I believe this claim of "mismatch" is utterly nonsense!
>>>>>> Instead of wasting everyone's time verifying. Why not Eugene
>>>>>> explain to
>>>>>> us what led to this claim. why it takes "a mismatch of data
>>>>>> and MC" to
>>>>>> show "the angle acceptance now start at ~22 degrees", why was
>>>>>> "flrpm->Draw("twl","qwl==-1")"
>>>>>> not enough?
>>>>>> I did it, 1 minute and I know that the acceptance starts at 24
>>>>>> degrees
>>>>>> fair and square!
>>>>>> Why did this claim even get through to BLAST_ANAWAE? 2 degrees
>>>>>> span by 1
>>>>>> meter is a whopping 3.5 centimeters! Did you really believe
>>>>>> that the
>>>>>> chambers were (mis)placed to the down stream by more than 3cm?
>>>>>> Chi
>>>>>> On Mon, 10 Apr 2006, Michael Kohl wrote:
>>>>>>> Hi,
>>>>>>> we'll meet on Wednesday 2006/04/12 at 13:30 at Bates.
>>>>>>> Proposed agenda:
>>>>>>> -Recrunch preparation, bugfixes, workarounds
>>>>>>> -Mascarad handling
>>>>>>> -Shifted acceptance
>>>>>>> Eugene had shown a mismatch of data and MC at low theta_e
>>>>>>> indicating
>>>>>> that
>>>>>>> the angle acceptance may now start at ~22 degrees instead of ~24
>>>>>> degrees.
>>>>>>> This would have a lot of impact on the dynamics as Q2 would be
>>>>>>> significantly affected by such a shift.
>>>>>>> I'm asking everyone to verify this shift. Compare online
>>>>>>> crunching
>>>>>> with
>>>>>>> v3_4_14 (=ANALDIR) and /net/data/11/Analysis/data/v3_4_17/
>>>>>>> lrd. The
>>>>>> latter
>>>>>>> version contains ntuples for both hydrogen and 2005 deuterium.
>>>>>>> Checks should be made for true event samples in p(e,e'), p
>>>>>>> (e,e'p),
>>>>>>> p(e,e'pi+), p(e,e'p)pi0, d(e,e'), d(e,e'd), d(e,e'p), d(e,e'n).
>>>>>>> Regards,
>>>>>>>
>>>>>>> Michael
>>>>>>> +-------------------------------------
>>>>>>> +--------------------------+
>>>>>>> | Office: |
>>>>>>> Home: |
>>>>>>> |-------------------------------------|-------------------------
>>>>>>> -|
>>>>>>> | Dr. Michael Kohl | Michael
>>>>>>> Kohl |
>>>>>>> | Laboratory for Nuclear Science | 5 Ibbetson
>>>>>>> Street |
>>>>>>> | MIT-Bates Linear Accelerator Center | Somerville, MA
>>>>>>> 02143 |
>>>>>>> | Middleton, MA 01949 |
>>>>>>> U.S.A. |
>>>>>>> | U.S.A.
>>>>>>> | |
>>>>>>> | - - - - - - - - - - - - | - - - - - - -
>>>>>>> - -|
>>>>>>> | Email: kohlm@mit.edu |
>>>>>>> K.Michael.Kohl@gmx.de |
>>>>>>> | Work: +1-617-253-9207 | Home:
>>>>>>> +1-617-629-3147 |
>>>>>>> | Fax: +1-617-253-9599 | Mobile:
>>>>>>> +1-978-580-4190 |
>>>>>>> | http://blast.lns.mit.edu
>>>>>>> | |
>>>>>>> +-------------------------------------
>>>>>>> +--------------------------+
>>>>> ------------------------------------------------------------------
>>>>> --------
>>>>> Eugene Geis
>>>>> PhD Student, Physics Department, ASU
>>>>> Research Affiliate, MIT-Bates Laboratory of Nuclear Science
>>>>> eugene.geis@asu.edu
>>>>> ------------------------------------------------------------------
>>>>> --------
>>>>> http://quickreaction.blogspot.com
>>> +-------------------------------------+--------------------------+
>>> | Office: | Home: |
>>> |-------------------------------------|--------------------------|
>>> | Dr. Michael Kohl | Michael Kohl |
>>> | Laboratory for Nuclear Science | 5 Ibbetson Street |
>>> | MIT-Bates Linear Accelerator Center | Somerville, MA 02143 |
>>> | Middleton, MA 01949 | U.S.A. |
>>> | U.S.A. | |
>>> | - - - - - - - - - - - - | - - - - - - - - -|
>>> | Email: kohlm@mit.edu | K.Michael.Kohl@gmx.de |
>>> | Work: +1-617-253-9207 | Home: +1-617-629-3147 |
>>> | Fax: +1-617-253-9599 | Mobile: +1-978-580-4190 |
>>> | http://blast.lns.mit.edu | |
>>> +-------------------------------------+--------------------------+
>>
>
>
> +-------------------------------------+--------------------------+
> | Office: | Home: |
> |-------------------------------------|--------------------------|
> | Dr. Michael Kohl | Michael Kohl |
> | Laboratory for Nuclear Science | 5 Ibbetson Street |
> | MIT-Bates Linear Accelerator Center | Somerville, MA 02143 |
> | Middleton, MA 01949 | U.S.A. |
> | U.S.A. | |
> | - - - - - - - - - - - - | - - - - - - - - -|
> | Email: kohlm@mit.edu | K.Michael.Kohl@gmx.de |
> | Work: +1-617-253-9207 | Home: +1-617-629-3147 |
> | Fax: +1-617-253-9599 | Mobile: +1-978-580-4190 |
> | http://blast.lns.mit.edu | |
> +-------------------------------------+--------------------------+
>
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