Determination of the proton spin structure functions for 0.05

  title={Determination of the proton spin structure functions for 0.05},
  author={R. G. Fersch and Nevzat Guler and Peter Bosted and Alexandre Deur and Keith A. Griffioen and Christopher Keith and Sebastian E. Kuhn and Ralph C. Minehart and Yelena Prok and The Clas Collaboration},
  journal={Physical Review C},
We present the results of our final analysis of the full data set of g1p(Q2), the spin structure function of the proton, collected using CLAS at Jefferson Laboratory in 2000–2001. Polarized electrons with energies of 1.6, 2.5, 4.2, and 5.7 GeV were scattered from proton targets (NH315 dynamically polarized along the beam direction) and detected with CLAS. From the measured double spin asymmetries, we extracted virtual photon asymmetries A1p and A2p and spin structure functions g1p and g2p over… 

Measurement of the proton spin structure at long distances

Measuring the spin structure of protons and neutrons tests our understanding of how they arise from quarks and gluons, the fundamental building blocks of nuclear matter. At long distances, the

The spin structure of the nucleon

Analytic calculations of the hadron spectrum have now being realized using light-front holography and superconformal quantum mechanics, a novel approach providing a well-founded semiclassical approximation to QCD.

Updating spin-dependent Regge intercepts

We use new high statistics data from CLAS and COMPASS on the nucleon's spin structure function at low Bjorken x and low virtuality, Q^2 < 0.5 GeV^2, together with earlier measurements from the SLAC

Quark-Hadron Duality of Spin Structure Functions in CLAS EG1b Data

The hypothesis of quark-hadron duality infers that physical observables of nucleons can be described by a complete set of basis states using either hadronic or quark degrees of freedom. In the EG1b

Detailed Study of Quark-Hadron Duality in Spin Structure Functions of the Proton and Neutron

Background: The response of hadrons, the bound states of the strong force (QCD), to external probes can be described in two different, complementary frameworks: As direct interactions with their

Measurement of the Q^{2} Dependence of the Deuteron Spin Structure Function g_{1} and its Moments at Low Q^{2} with CLAS.

The generalized Gerasimov-Drell-Hearn sum, the moment Γ_{1}^{d} and the spin polarizability γ_{0}^{ d} are precisely determined down to a minimum Q^{2} of 0.02  GeV^{2] for the first time, about 2.5 times lower than that of previous data.

Orbital angular momentum of the proton and intrinsic five-quark Fock states

The orbital angular momentum (Lq) of the proton is studied by employing the extended constituent quark model. Contributions from different flavors, namely, up, down, strange, and charm quarks in the

Sensitivity of strange quark polarization to flavor SU(3) symmetry breaking

The polarized strange quark puzzle concerns the fact that the polarized strange quark density extracted from polarized inclusive deep inelastic scattering data is significantly negative, whereas it

Experimental studies at lowQ2 of the spin structure of the nucleon at Jefferson Lab

We summarize the experimental program of Jefferson Lab that studies the nucleon spin structure at low $Q^2$. This program completes the precise experimental mapping of the nucleon spin structure



The COMPASS Collaboration

The Collins and Sivers asymmetries for charged hadrons produced in deeply inelastic scattering on transversely polarised protons have been extracted from the data collected in 2007 with the CERN SPS

Techniques for Nuclear and Particle Physics Experiments

Et al

A large population-based survey of veterans and nondeployed controls found evidence of a deployment-related Gulf War syndrome by factor analysis in Air Force veterans and controls.

and a at

The xishacorene natural products are structurally unique apolar diterpenoids that feature a bicyclo[3.3.1] framework. These secondary metabolites likely arise from the well-studied, structurally

Old Dominion University 滞在記

Old Dominion University began its tradition of excellence when it was founded in 1930 by the College of William and Mary, the second oldest university in the United States. Established as an


  • (CLAS Collaboration), Phys. Lett. B 672,
  • 2009


  • (CLAS Collaboration), Phys. Lett. B 672,
  • 2009


  • Phys. Proc. Suppl. 73, 300
  • 1999


  • Rev. D90, 012009
  • 2014

Jefferson Lab E01-012

  • Collaboration), Phys. Rev. Lett. 101,
  • 2008