Recent HERA Results from H1 and ZEUS

Overview:

• Electroweak Physics

• The strong coupling alpha_s

• DIS Cross Sections and Parton Densities

• Structure Functions xF₃ and F_L

• Heavy Quark Production

• Quark Radius

• Anomalous Top couplings

• The hadronic final state and fragmentation

Electroweak Physics:

• polarisation dependence of the total charged current cross sections:

reference H1prelim-06-041:

The strong coupling alpha_s:

• alpha_s from fits to jet rates in Deep Inelastic Scattering:

reference H1prelim-08-032:

reference H1prelim-08-031:

DIS Cross Sections and Parton Densities

• Neutral Current Cross Sections and fits of the parton densities of the proton:

reference H1prelim-08-045:

The Structure Function F_L

• First Measurement of the Structure Function F_L at low x by the H1 Collaboration

reference: H1prelim-08-041, H1prelim-08-042

The Structure Function F₃

• First Measurement of the Structure Function F_L at low x by the H1 Collaboration

reference H1prelim-06-142:

reference H1prelim-06-142:

Heavy Quark Production

• Structure Functions F₂^c and F₂^b :

reference H1prelim-07-171:

The Quark Radius

• limit on the size of the quark radius from Neutral Current Deep Inelastic Scattering

reference H1prelim-07-141:

Anomalous Couplings of the Top Quark

• from a search for single top quark production at HERA limits on anomalous top quark couplings are derivedL

reference H1prelim-07-163:

The hadronic final state and Fragmentation:

• fragmentation function of charged particles:

reference :

• fragmentation parameters for D* mesons:

reference H1prelim-08-078:

last changed: A.Schoening 05.05.2008