1 Kinematics Plots Single event : electron, positive charged pion Under Condition : W ≥ 2GeV, Reaction : ep→e’π + ( X ) Scaling Update Report Apr.09,’07.

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Presentation transcript:

1 Kinematics Plots Single event : electron, positive charged pion Under Condition : W ≥ 2GeV, Reaction : ep→e’π + ( X ) Scaling Update Report Apr.09,’07 1. Momentum and angles for electron, pion

2 Kinematics Angle between virtual photon and pion = θ πγ* = C.M. π+ polar angle Beam Direction = z-axis e e’e’ γ*γ* n π+π+ tgt θπγ*θπγ* Scattering plane Reaction plane Scaling Update Report Apr.09,’07

3 t-channel Some plots from t-channel information …. Scaling Update Report Apr.09,’ t vs. electron momentum and pion angles(cos) Goal : check out the -t channel variable vs. X DATA

4 t-channel Some plots from t-channel information …. Scaling Update Report Apr.02,’ t vs. pion momentum and electron angle Goal : check out the -t channel variable vs. X DATA

5 Some plots compared between DATA and GSIM …. Scaling Update Report Apr.02,’07 DATAGSIM-exclusiveGSIM-semi-inclusive A’ -region GSIM does not have 2GeV cut, so Data is right. If, 2GeV cut for GSIM, they are same as Data

6 Some plots compared between DATA and GSIM …. Scaling Update Report Apr.02,’07 DATAGSIM-exclusiveGSIM-semi-inclusive t-channel A’ -region GSIM does not have 2GeV cut, so Data is right. If, 2GeV cut for GSIM, they are same as Data

7 Some plots compared between DATA and GSIM …. Scaling Update Report Apr.02,’07 DATAGSIM-exclusiveGSIM-semi-inclusive t-channel A -region GSIM does not have 2GeV cut, so Data is right. If, 2GeV cut for GSIM, they are same as Data

8 Some plots compared between DATA and GSIM …. Scaling Update Report Apr.02,’07 DATAGSIM-exclusiveGSIM-semi-inclusive t-channel A, A’-region GSIM does not have 2GeV cut, so Data is right. If, 2GeV cut for GSIM, they are same as Data

9 Acceptance calculation Scaling Update Report Apr.09,’07 1.Acceptance has been calculated with GSIM in terms of X, -t, Q 2, φ 2.Exclusive channels with diff. GPP flags sets have been compared 3.Same missing mass cut (3.5σ) cut 4.MMX cut range : 0.877GeV < MMx < GeV

10 Scaling Update Report Apr.09,’07

11 Acceptance Goal : Estimation Systematic error for acceptance calculation based on different GPP flags. N [φ CM ] = 9 bins ► φ CM = 0 o ~ 360 o N [X BJ ] = 9 bins ► X BJ = 0.16 ~ 0.70 N [Q 2 ] = 7 bins ► Q 2 = 1.72~4.96GeV 2 N [-t] = 9 bins ► -t = 0.1~4.3GeV 2 Scaling Update Report Apr.09,’07 15% stat.

12 Acceptance Goal : Estimation Systematic error for acceptance calculation based on different GPP flags. N [φ CM ] = 9 bins ► φ CM = 0 o ~ 360 o N [X BJ ] = 9 bins ► X BJ = 0.16 ~ 0.70 N [Q 2 ] = 7 bins ► Q 2 = 1.72~4.96GeV 2 N [-t] = 9 bins ► -t = 0.1~4.3GeV 2 Scaling Update Report Apr.09,’07 15% stat.

13 Acceptance Goal : Estimation Systematic error for acceptance calculation based on different GPP flags. N [φ CM ] = 9 bins ► φ CM = 0 o ~ 360 o N [X BJ ] = 9 bins ► X BJ = 0.16 ~ 0.70 N [Q 2 ] = 7 bins ► Q 2 = 1.72~4.96GeV 2 N [-t] = 9 bins ► -t = 0.1~4.3GeV 2 Scaling Update Report Apr.09,’07 15% stat.

14 Acceptance Goal : Estimation Systematic error for acceptance calculation based on different GPP flags. N [φ CM ] = 9 bins ► φ CM = 0 o ~ 360 o N [X BJ ] = 9 bins ► X BJ = 0.16 ~ 0.70 N [Q 2 ] = 7 bins ► Q 2 = 1.72~4.96GeV 2 N [-t] = 9 bins ► -t = 0.1~4.3GeV 2 Scaling Update Report Apr.09,’07 15% stat.

15 Acceptance Goal : Estimation Systematic error for acceptance calculation based on different GPP flags. N [φ CM ] = 9 bins ► φ CM = 0 o ~ 360 o N [X BJ ] = 9 bins ► X BJ = 0.16 ~ 0.70 N [Q 2 ] = 7 bins ► Q 2 = 1.72~4.96GeV 2 N [-t] = 9 bins ► -t = 0.1~4.3GeV 2 Scaling Update Report Apr.09,’07 15% stat.

16 Acceptance Goal : Estimation Systematic error for acceptance calculation based on different GPP flags. N [φ CM ] = 9 bins ► φ CM = 0 o ~ 360 o N [X BJ ] = 9 bins ► X BJ = 0.16 ~ 0.70 N [Q 2 ] = 7 bins ► Q 2 = 1.72~4.96GeV 2 N [-t] = 9 bins ► -t = 0.1~4.3GeV 2 Scaling Update Report Apr.09,’07 15% stat.

17 Acceptance Goal : Estimation Systematic error for acceptance calculation based on different GPP flags. N [φ CM ] = 9 bins ► φ CM = 0 o ~ 360 o N [X BJ ] = 9 bins ► X BJ = 0.16 ~ 0.70 N [Q 2 ] = 7 bins ► Q 2 = 1.72~4.96GeV 2 N [-t] = 9 bins ► -t = 0.1~4.3GeV 2 Scaling Update Report Apr.09,’07 15% stat.

18 Radiative correction Scaling Update Report Apr.09,’07 1.Need correction exclusive radiative correction 2.Possible(?) Rad. Corr. through Semi-inclusive Rad. Corr. -By Alexander Ilyichev 3.Extrapolate Radiative correction factor based on the low kinematic region in terms of X, -t, Q 2, φ 4.ExcluRad is based on the Unitary Isobal model upto 2GeV of W

19 Radiative correction Scaling Update Report Apr.09,’07 1.ExcluRad is based on the Unitary Isobal model upto 2GeV of W