I expect at least some mismatch from the data vs. MC. After all, MC
uses the ideal chamber positions, and may not have realistic T2D
functions along the cell boundaries.
--Chris
_______________________________________
TA-53/MPF-1/D111 P-23 MS H803
LANL, Los Alamos, NM 87545
505-665-9804(o) 665-4121(f) 662-0639(h)
_______________________________________
On Apr 12, 2006, at 08:54:46, Michael Kohl wrote:
> Hi,
>
> this is from Adam. There is a mismatch between data and MC at
> forwardangles, 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
> <THe_v3_4_17.ps>
> 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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>
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