[Clas_hadron] Morrison abstract

Wed Jun 29 20:03:06 EDT 2011

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 allowed to publish GE09 vs previously unpublished solution E429.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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