Hi Adrian,
thanks for the plot. Please also send the parameters for the other
parametrizations of corrections for proton-theta's, phi's and z's as
functions of electron-theta's, phi's and z's.
I see that the correction for proton-dz is almost 1cm in the right sector.
The correction assumes that electron-z is correct. How do the absolute z
distributions for protons and electrons compare with each other? Are the
corrected distributions symmetric around z=0?
Similarly, are the corrected phi distributions symmetric around phi=0 and
phi=180?
If not, the assumption of believing z_electron and phi_electron may not be
valid.
So, please send plots for phi and z for protons and electrons before and
after corrections.
>From looking at the angle offset of about -0.2 degrees I assume that your
results are for the most recent recrunch, right? So, how does the ep
elastic yield distribution as a function of Q2 compare with the previous
crunch version of last summer (v3_4_12), both before and after
corrections? Did the most recent recrunch after including corrections
change anything? (Or differently asked, is it the electron angle or the
proton angle that has shifted by 0.2 degrees between the two crunch
versions?)
Best regards,
Michael
On Wed, 8 Mar 2006, Adrian T Sindile wrote:
> Hi Michael, Eugene,
> Here is a plot of my polynomials fitting those offsets:
>
> http://einstein.unh.edu/~adrian/meeting0905/7wcCutsPhi14Pol7.gif
>
> I think this is what Michael asked me about today over the phone (Eugene also
> had a related question in an email). I showed many times these plots
> before... The black curves fitting the blue points representing the offsets
> are the polynomials I sent last night (of course, only the top four plots in
> the above gif are related to momentum corrections).
>
> I guess I could have used lower degree polynomials, but I just wanted to use
> the same degree for all quantities shown in the gif... and 7 seems to
> represent them well, without wiggling too much.
>
> I hope this helps,
> Adrian
>
> On Tue, 7 Mar 2006, Adrian T Sindile wrote:
>
>> Hi Michael,
>> Here are the coefficients of my polynomials (Sum a_i * X^i), i=0 to 7,
>> where X is either theta_e or theta_p (the rest of the notation should be
>> self-explanatory):
>>
>> lEl[0] = 4.1776
>> rEl[0] = 10.96
>> lPr[0] = -172.12
>> rPr[0] = 1.12963
>> lEl[1] = -0.613272
>> rEl[1] = -1.69205
>> lPr[1] = 24.5484
>> rPr[1] = 0.832006
>> lEl[2] = 0.0371843
>> rEl[2] = 0.109535
>> lPr[2] = -1.48666
>> rPr[2] = -0.114424
>> lEl[3] = -0.00121402
>> rEl[3] = -0.00386183
>> lPr[3] = 0.0495661
>> rPr[3] = 0.00602106
>> lEl[4] = 2.30411e-05
>> rEl[4] = 8.02642e-05
>> lPr[4] = -0.000982763
>> rPr[4] = -0.000163778
>> lEl[5] = -2.53942e-07
>> rEl[5] = -9.84557e-07
>> lPr[5] = 1.15906e-05
>> rPr[5] = 2.45495e-06
>> lEl[6] = 1.50163e-09
>> rEl[6] = 6.60608e-09
>> lPr[6] = -7.5309e-08
>> rPr[6] = -1.93057e-08
>> lEl[7] = -3.6612e-12
>> rEl[7] = -1.87206e-11
>> lPr[7] = 2.08019e-10
>> rPr[7] = 6.23714e-11
>>
>> Adrian
>>
>> On Tue, 7 Mar 2006, Michael Kohl wrote:
>>
>>> Hi Adrian,
>>>
>>>> Please note from the stats how well they center around 0. If people find
>>>> these useful, I can send my parametrizations p_e(theta_e) and
>>>> p_p(theta_p)... they are 7-th degree polynomials used in event selection
>>>> and illustrated by the above plots.
>>> yes, please send them!
>>>
>>> Best 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 | |
>>> +-------------------------------------+--------------------------+
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>
> --
>
> -------------------------------
> Adrian Sindile
> Research Assistant
> Nuclear Physics Group
> University of New Hampshire
> phone: (603)862-1217
> FAX: (603)862-2998
> email: asindile@unh.edu
> http://einstein.unh.edu/~adrian/
>
>
+-------------------------------------+--------------------------+
| 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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