Beam Request for PVDIS- SoLID3 SLides Motivation for PVDIS A PV = G - - PowerPoint PPT Presentation
Beam Request for PVDIS- SoLID3 SLides Motivation for PVDIS A PV = G F Q 2 [ ] a ( x ) + Y ( y ) b ( x ) Standard Model 2 ( x ) C 2i Q i f i d/u for b ( x ) = i 2 f i + ( x ) Q i Hydrogen i Di-quarks in CSV at Quark
b(x) = C2iQi fi
−(x) i
Qi
2 fi +(x) i
APV = G FQ 2 2πα a(x) + Y (y) b(x)
RCSV = δAPV x
( )
APV x
( )
= 0.28δu x
u x
δu(x) = up(x) − dn(x) δd(x) = d p(x) − un(x)
Strategy: sub-1% precision over broad kinematic range for sensitive Standard Model test and detailed study of hadronic structure contributions Untangle Physics with fit: 4 months at 11 GeV 2 months at 6.6 GeV Error bar σA/A (%) shown at center of bins in Q2, x
+ − + =
2 2 3
) 1 ( 1 1 x Q x A A
CSV HT
β β
Test 27 14 11 120 90 6.6 60
18 9
Energy(GeV)
Days(LD2) Days(LH2)
ANL design
International Collaborators: China (Gem’s) Italy (Gem’s) Germany (Moller pol.)
JLab/UVA prototype