[Clas_hadron] Morrison abstract
Igor Strakovsky
igor at va.gwu.edu
Wed Jun 29 19:46:33 EDT 2011
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allowed to publish GE09 vs previously unpublished solution E429.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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