Beam Request for PVDIS- SoLID3 SLides Motivation for PVDIS A PV = G - PowerPoint PPT Presentation

Beam Request for PVDIS- SoLID—3 SLides

Motivation for PVDIS A PV = G F Q 2 [ ] a ( x ) + Y ( y ) b ( x ) Standard Model 2 πα ∑ − ( 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 Level the nucleon δ u ( x ) = u p ( x ) − d n ( x ) (Q 2 Dependence) δ d ( x ) = d p ( x ) − u n ( x ) ( ) − δ d x ( ) ( ) = 0.28 δ u x R CSV = δ A PV x ( ) + d x ( ) ( ) A PV x u x

Running time Strategy: sub-1% precision over broad kinematic range for sensitive Standard Model test and detailed study of hadronic structure contributions Untangle Physics with fit: Error bar σ A /A (%)   1 shown at center of bins = + β + β 2 A A 1 x   HT CSV − 3 2 ( 1 x ) Q   in Q 2 , x Beam Time Request: 4 months at LD 2 : 245 Days 11 GeV LH 2 : 113 Days Energy(GeV) 4.4 6.6 11 Test 2 months at 6.6 GeV Days(LD2) 18 60 120 27 Days(LH2) 9 - 90 14

SoLID Spectrometer Babar Solenoid Gas Cerenkov Shashlyk Calorimeter Baffles ANL design GEM’s International Collaborators: China (Gem’s) Italy (Gem’s) Germany (Moller pol.) JLab/UVA prototype