[Clas_hadron] Morrison abstract
Igor Strakovsky
igor at va.gwu.edu
Wed Jun 29 22:26:15 EDT 2011
Mike,
All sounds good to me
Igor
On Wed, 29 Jun 2011 22:24:49 -0400 (EDT), Michael Dugger <dugger at jlab.org>
wrote:
>
> Igor,
>
> OK. There are two double polarization data points that are not yet an
>asymmetry. Brian can change his wording to state "double polarization
>asymmetry measurements" instead of "double polarization observables".
>
> Brian should also be sure to state that he is only referring to published
>data when talking about previous measurements. Moreover, he should change the
>wording so that it is clear that he is only talking about eta
>photoproduction.
>
> -Michael
>
> On Wed, 29 Jun 2011, Igor Strakovsky wrote:
>
>> yep, Mike
>>
>> On Wed, 29 Jun 2011 20:57:01 -0400, Eugene Pasyuk <pasyuk at jlab.org> wrote:
>>
>>> This is absolute helicity dependent cross section difference.
>>> If you divide it by the the sum of the cross sections you will get
>>> asymmetry E.
>>>
>>> -Eugene
>>>
>>> Michael Dugger wrote, On 06/29/11 20:30:
>>>>
>>>> Igor,
>>>>
>>>> I want to make sure I understand what you wrote.
>>>>
>>>> What is the "delta" in "delta[DSG(1/2)-DSG(3/2)]"
>>>>
>>>>
>>>> -Michael
>>>>
>>>>
>>>> On Wed, 29 Jun 2011, Igor Strakovsky wrote:
>>>>
>>>>> That is delta[DSG(1/2)-DSG(3/2)]
>>>>>
>>>>> On Wed, 29 Jun 2011 20:03:06 -0400 (EDT), Michael Dugger<dugger at jlab.org>
>>>>> wrote:
>>>>>
>>>>>>
>>>>>> Igor,
>>>>>>
>>>>>> The types of measurements given in your table are: S,P,T,DSG,SGT, and DX13.
>>>>>>
>>>>>> I assume you are referring to the DX13 type measurement when you say that
>>>>>> there are some double pol data. Is this a correct assumption?
>>>>>>
>>>>>> What is the type DX13? I am unfamiliar with this.
>>>>>>
>>>>>> -Michael
>>>>>>
>>>>>> On Wed, 29 Jun 2011, Igor Strakovsky wrote:
>>>>>>
>>>>>>> Hi Brian and John,
>>>>>>>
>>>>>>> I am afraid but cannot agree with both of you. The world database
>>>>>>> have both unpol and pol measurements already - see enclosed map for
>>>>>>> Eg = 320-2350 MeV. Our recent CB at MAMI DSG measurements [MC(10)]
>>>>>>> allowed to publish GE09 vs previously unpublished solution E429.
>>>>>>> Obviously, pol data have a minor contribution and there are no E
>>>>>>> data. Some double pol measurements are available - unfortunately
>>>>>>>
>>>>>>> Igor
>>>>>>>
>>>>>>> ---------------------------------------------------------------------
>>>>>>> GPEP NORMALIZED Chi2 SUMMARY 6/29/11 for:
>>>>>>> EP072 eta-photo-prod 03/07 Arndt/Strak 09/23/10
>>>>>>> Sol1-E429 (700-2900) 2818/1811 32 PRM SP06 6
>>>>>>> Sol2-GE09 (700-2900) 6295/4211 34 PRM SM05 6
>>>>>>>
>>>>>>> Thresholds= 706.88
>>>>>>>
>>>>>>> SR TYPE Nexp Ndta Emn Emx Amn Amx Ch1 Ch2
>>>>>>> SU(09) DSG 8 32 1650.0 2350.0 130.5 161.8 1078.53 432.72
>>>>>>> HO(69) DSG 3 3 2030.0 2200.0 36.0 58.0 43.81 45.39
>>>>>>> VA(80) S 5 5 1390.0 1800.0 46.0 73.0 38.37 36.98
>>>>>>> HO(71) DSG 3 3 890.0 1050.0 82.3 108.3 18.58 13.30
>>>>>>> MC(10) DSG 120 2400 710.4 1394.8 18.2 161.8 13254.32 3329.22
>>>>>>> VA(80) DSG 5 5 1390.0 1800.0 46.0 57.0 24.34 21.15
>>>>>>> HO(88) DSG 15 15 808.0 1008.0 45.0 114.0 66.82 90.47
>>>>>>> WI(09) DSG 51 860 1044.0 2325.0 32.9 148.2 3403.68 3462.69
>>>>>>> HE(70) P 5 5 830.0 1105.0 90.0 90.0 17.62 22.10
>>>>>>> BA(63) DSG 2 4 937.0 978.0 103.0 106.0 11.50 12.86
>>>>>>> BA(07) S 15 150 724.0 1472.0 33.4 161.1 417.06 462.59
>>>>>>> CR(09) DSG 30 600 875.0 2325.0 18.2 161.8 1503.85 1528.95
>>>>>>> DU(02) DSG 24 190 775.0 1925.0 45.6 134.4 447.43 448.50
>>>>>>> BO(98) T 10 50 717.0 1105.0 33.0 145.0 116.45 185.77
>>>>>>> DY(95) DSG 2 12 729.0 753.0 15.0 165.0 27.91 26.57
>>>>>>> DE(69)4 DSG 6 17 725.0 875.0 18.2 158.4 36.75 42.03
>>>>>>> KR(95) SGT 54 54 706.9 792.3 0.0 0.0 110.82 101.01
>>>>>>> HO(71) P 2 2 890.0 890.0 82.3 108.3 3.62 1.99
>>>>>>> BA(68) DSG 3 12 775.0 850.0 12.5 94.3 19.53 21.56
>>>>>>> KR(95) DSG 10 100 715.9 789.9 25.8 154.2 137.63 142.53
>>>>>>> CR(05) DSG 31 545 774.0 2277.0 18.2 138.6 689.85 638.58
>>>>>>> BA(07) DSG 30 487 714.0 1477.0 31.8 161.8 571.53 353.57
>>>>>>> BA(66) DSG 20 20 836.0 955.0 107.0 119.0 20.65 23.36
>>>>>>> BO(74) DSG 36 36 1240.0 2310.0 7.0 46.0 35.29 29.17
>>>>>>> NA(06) DSG 18 180 718.0 1142.0 25.8 154.2 166.52 275.72
>>>>>>> ER(07) S 34 34 842.6 1344.7 50.7 148.4 26.17 25.03
>>>>>>> CH(73) DSG 9 9 1490.0 2200.0 35.7 45.6 5.50 5.50
>>>>>>> PR(95) SGT 8 8 708.6 718.7 0.0 0.0 4.19 12.77
>>>>>>> ER(68) SGT 1 1 729.0 729.0 0.0 0.0 0.03 0.03
>>>>>>> AR(03) DSG 2 2 783.5 790.2 70.0 70.0 0.02 0.02
>>>>>>> DY(95) SGT 1 1 753.0 753.0 0.0 0.0 0.01 0.04
>>>>>>> AR(03) DX13 2 2 783.5 790.2 70.0 70.0 0.01 0.05
>>>>>>>
>>>>>>> Nexp= 565 Ndata= 5844 ChN(1)= 22298.4 ChN(2)= 11792.2
>>>>>>> ChU(1)= 116999.2 ChU(2)= 238508.1
>>>>>>>
>>>>>>> On Wed, 29 Jun 2011 15:18:26 -0700, John Price<jprice at csudh.edu> wrote:
>>>>>>>
>>>>>>>> Hi Brian:
>>>>>>>>
>>>>>>>> Your statement that "...there are no previous measurements for double
>>>>>>>> polarization observables" desperately needs to be preceded by a
>>>>>>>> statement of exactly what process you're talking about. CLAS has
>>>>>>>> published several double polarization observables in multiple reactions
>>>>>>>> over the years, as have (I suspect) several other facilities. I would
>>>>>>>> suggest rewording the second sentence as
>>>>>>>>
>>>>>>>> "In the eta photoproduction process on the proton, there are relatively
>>>>>>>> few single polarization measurements, compared to unpolarized
>>>>>>>> differential cross section measurements, and no double polarization
>>>>>>>> measurements." Some wordsmithing is still needed there.
>>>>>>>>
>>>>>>>> John
>>>>>>>>
>>>>>>>> --
>>>>>>>> John W. Price
>>>>>>>> Professor and Chair of Physics
>>>>>>>> CSU Dominguez Hills
>>>>>>>> 310-243-3403
>>>>>
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>>
>> Igor Strakovsky, SAID CNS The George Washington University
>> Tel: 703-726-8344(NV),202-994-4742(FB),Skype: igors1945_2
>> Fax: 202-994-3001(FB),Emails: igor at va.gwu.edu, igor at jlab.org
>> _______________________________________________
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>>
Igor Strakovsky, SAID CNS The George Washington University
Tel: 703-726-8344(NV),202-994-4742(FB),Skype: igors1945_2
Fax: 202-994-3001(FB),Emails: igor at va.gwu.edu, igor at jlab.org
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