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HES HKS Analysis meeting 14/Dec/2012 @ JLab Toshi Gogami

HES HKS Analysis meeting

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HES HKS Analysis meeting. 14/Dec/2012 @ JLab Toshi Gogami. Preliminary results of p(γ*,K + )Λ. ( JLab E05-115 , Q 2 ~ 0.01 [GeV/c] 2 ). Preliminary. JLab E05-115 (HES-HKS) 192±6±89 [ nb / sr ]. SAPHIR : K.H.Glander et al. , Eur. Phys. J. A 19, 251-273 (2004) - PowerPoint PPT Presentation

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HES HKS Analysis meeting14/Dec/2012 @ JLabToshi GogamiPreliminary results of p(*,K+)2012/9/14JPS meeting in Kyoto , Toshi Gogami2

PreliminaryJLab E05-115 (HES-HKS)192689 [ nb / sr ]SAPHIR : K.H.Glander et al. , Eur. Phys. J. A 19, 251-273 (2004)CLAS : R.Bradford et al. , Phys. Rev. C 73, 035202 (2006)( JLab E05-115 , Q2 ~ 0.01 [GeV/c]2 )Definition of cross section

Solid angle of HKSEvent by eventThe number of VPIncluding HES solid angle and acceptanceNew way to estimateThe number of electrons = 1.7545e183

VP flux factor ( Ee , , e )Ee = 2.344 GeV = 1.5 GeVJab E05-115 , Polyethylene target

e (lab)

VP flux factor vs. p and ~ 0.087~ 0.01HESHKSIntegrated VP flux factor

VP flux factorDivided into 7 regions13452Jab E05-115 , Polyethylene target67e (lab)

VP flux factorDivided into 7 regions13452Jab E05-115 , Polyethylene target0.00350.00430.00580.00810.0115Q2 [GeV]2670.00240.0160

( Region 4 )

SIMULATION0.790 0.844 GeV/c( 1.922 < W < 1.947 GeV) ~ 3.5543 10-6 [ /Ne ] ~ 0.065 [ / GeV / sr / Ne ]Number of VP ~ 6.28181012 4.051891010Resultse' (Lab)gK (CM)Q2 [GeV]2'Number of VPsolid angles (HES,HKS)[msr]NCross section [ nb/sr ]0.030 - 0.040

0.3060.3120.08

0.00242.45e-35.9e-4

0.221

4.27923e-06

7.52071e+121.05573e+110.3 , 8.4

384 +- 24

206.161 ( +- 13.1462 ) ( - 96.8266 ) ( + 97.1458 )

0.040 - 0.0450.2980.3050.080.00353.54e-32.6e-40.1502.34783e-064.18425e+124.29365e+100.3 , 8.4149 +- 17144.837 ( +- 16.5421 ) ( - 61.9157 ) ( + 62.1365 )0.045 - 0.0500.3090.3070.070.00434.30e-33.2e-40.1212.25936e-063.98002e+124.30705e+100.3 , 8.4142 +- 17144.097 ( +- 17.6952 ) ( - 60.6333 ) ( + 60.8523 )0.050 - 0.0600.2980.2980.080.00585.85e-38.3e-4

0.0904.10857e-067.20095e+126.46153e+100.8 , 8.4300 +- 24169.896 ( +- 13.671 ) ( - 77.3213 ) ( + 77.5833 )0.060 - 0.0700.3120.3120.090.00818.029.4e-4

0.0653.5543e-066.26988e+123.97629e+101.0 , 8.4307 +- 24199.578 ( +- 15.6367 ) ( - 91.1819 ) ( + 91.4899 )0.070 - 0.0850.3160.3120.08

0.01151.129e-21.629e-30.0464.50219e-067.80142e+126.16911e+101.8 , 8.4378 +- 27196.161 ( +- 14.4697 ) ( - 90.3967 ) ( + 90.6998 )0.085 - 0.100

0.3000.3060.09

0.01601.593e-21.600e-30.033

2.7764e-064.78124e+129.17287e+101.6 , 8.4215 +- 20

181.798 ( +- 17.2207 ) ( - 80.6174 ) ( + 80.8964 )Angular dependenceSAPHIR : K.H.Glander et al. , Eur. Phys. J. A 19, 251-273 (2004)CLAS : R.Bradford et al. , Phys. Rev. C 73, 035202 (2006)

Q2 dependence

Q2 dependence

SAPHIR : K.H.Glander et al. , Eur. Phys. J. A 19, 251-273 (2004)

Coincidence cut for 52Cr TCut cut_1 = "abs(ctime+54.6)