Parity violating asymmetries: Milos (Greece) May Parity violating asymmetries: Milos (Greece) May 2006 2006 Solitonic approach Solitonic approach to strange Form to strange Form Factors Factors Klaus Goeke Klaus Goeke Bochum University Transregio/SFB Bonn, Bochum, Giessen Verbundforschung BMFT Hadronen und Kerne COSY-Project Jülich Applications of the Chiral Quark Soliton Model to SAMPLE, HAPPEX , G0 and A4
62
Embed
Parity violating asymmetries: Milos (Greece) May 2006 Solitonic approach to strange Form Factors
Parity violating asymmetries: Milos (Greece) May 2006 Solitonic approach to strange Form Factors. Applications of the Chiral Quark Soliton Model to SAMPLE, HAPPEX , G0 and A4. Klaus Goeke. Bochum University Transregio/SFB Bonn, Bochum, Giessen Verbundforschung BMFT Hadronen und Kerne - PowerPoint PPT Presentation
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Parity violating asymmetries: Milos (Greece) May 2006 Parity violating asymmetries: Milos (Greece) May 2006
Solitonic approach to Solitonic approach to strange Form Factors strange Form Factors
Klaus Goeke Klaus Goeke Bochum University
Transregio/SFB Bonn, Bochum, Giessen
Verbundforschung BMFT Hadronen und Kerne
COSY-Project Jülich
Applications of the Chiral Quark Soliton Modelto SAMPLE, HAPPEX , G0 and A4
ContentsContents Chiral Quark Soliton ModelChiral Quark Soliton Model
Quantum ChromodynamicsQuantum Chromodynamics Relativistic Mean Field DescriptionRelativistic Mean Field Description
Strange magnetic form factorsStrange magnetic form factors Experiments A4 G0 SAMPLE HAPPEXExperiments A4 G0 SAMPLE HAPPEX AsymmetriesAsymmetries Global dataGlobal data
Form factors, Parton distributions etc.Form factors, Parton distributions etc. Chiral Symmetry breaking, InstantonsChiral Symmetry breaking, Instantons
Silva et al.Silva et al.
Hyun-Chul Kim (Busan)Hyun-Chul Kim (Busan) Antonio Silva (Coimbra)Antonio Silva (Coimbra) Diana Urbano (Porto)Diana Urbano (Porto) K. G. (Bochum)K. G. (Bochum)
Parity violating electron Parity violating electron scatteringscattering
0( )Z q
Parity violating electron Parity violating electron scatteringscattering
SAMPLE
HAPPEX
A4
A good theory must be able to describe several form factors simultaneously
and generalized form factors (i.e. generalized parton distributions) and parton distributions and anti-parton distributions
QCDQCD
Lattice TechniquesLattice Techniques Aim: exactAim: exact T T infinite infinite V V infinite infinite a a zero zero Pion mass Pion mass 140 GeV 140 GeV Wilson Clover Wilson Clover
StaggeredStaggered (Un)quenched(Un)quenched Extraction of Extraction of
dimensional quantitiesdimensional quantities
Effective ModelsEffective Models Certain physical Certain physical
Regularization: Proper Time, Pauli-Villars regularization
SU(2): Lagrangean: , ,
SU(2): Physics: 93 , 139 ,
(3) : In addition 180 and Witten's embedding (2) (3)
a
cutoff
c proton
s
m M
f MeV m MeV r
SU m MeV SU SU
nd perturbative treatment in collective quantization
0
Numbers:
420 , 15 , 600cutoffM MeV m MeV MeV
3(250 )MeV
Stationary state of this lagrangean calculated by relativistic mean field techniquesProjection on angular momentum quantum numbers by semiclassical methods
Strange weak and magnetic Strange weak and magnetic form factorform factor
SummarySummary Chiral Quark Soliton ModelChiral Quark Soliton Model
Simplest Quark model with Simplest Quark model with spont.chir.symm.breakingspont.chir.symm.breaking
Relativistic Mean Field DescriptionRelativistic Mean Field Description Collective QuantizationCollective Quantization
Strange magnetic form factorsStrange magnetic form factors Experiments A4 G0 SAMPLE HAPPEX-II Experiments A4 G0 SAMPLE HAPPEX-II AsymmetriesAsymmetries
Octet- and Decuplet- form factorsOctet- and Decuplet- form factors Parton distributions, GPDsParton distributions, GPDs
JLAB-animationJLAB-animation
Parity violating electron Parity violating electron scatteringscattering
Strange Form factorsStrange Form factors
ChQSM works wellChQSM works well Only approach with Only approach with ss>0>0 Experiments with large error barsExperiments with large error bars Clear predictions for A4, G0Clear predictions for A4, G0 Theory with large error barsTheory with large error bars
Strange Form Factors FStrange Form Factors F11 and F and F22