[Clas_hadron] Morrison abstract
Eugene Pasyuk
pasyuk at jlab.org
Wed Jun 29 20:57:01 EDT 2011
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 allowed to publish GE09 vs previously unpublished solution E429.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
>>
> _______________________________________________
> Clas_hadron mailing list
> Clas_hadron at jlab.org
> https://mailman.jlab.org/mailman/listinfo/clas_hadron
More information about the Clas_hadron
mailing list