다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

Generalized parton distributions

We study in QCD the physics of deeply virtual Compton scattering (DVCS){emdash}the virtual Compton process in the large s and small t kinematic region. We show that DVCS can probe a new type of {ital off-forward} parton distributions. We derive an Altarelli-Parisi-type of evolution equations for these distributions. We also derive their sum rules in terms of nucleon form factors of the twist-two quark and gluon operators. In particular, we find that the second sum rule is related to fractions of the nucleon spin carried separately by quarks and gluons. We estimate the cross section for DVCS and compare it with the accompanying Bethe-Heitler process at CEBAF and HERMES kinematics. {copyright} {ital 1997} {ital The American Physical Society}

Deeply Virtual Compton Scattering

Unraveling hadron structure with generalized parton distributions

Hard exclusive reactions and the structure of hadrons

The apparent discrepancy between the Rosenbluth and the polarization transfer methods for the ratio of the electric to magnetic proton form factors can be explained by a two-photon exchange correction which does not destroy the linearity of the Rosenbluth plot. Though intrinsically small, of the order of a few percent of the cross section, this correction is accidentally amplified in the case of the Rosenbluth method.

How to reconcile the Rosenbluth and the polarization transfer methods in the measurement of the proton form factors.

The role of nucleon structure in finite nuclei

Hard Electroproduction of Photons and Mesons on the Nucleon

Virtual compton scattering and generalized polarizabilities of the proton

We formulate the quark meson coupling model as a many-body effective Hamiltonian. This leads naturally to the appearance of many-body forces. We investigate the zero range limit of the model and compare its Hartree-Fock Hamiltonian to that corresponding to the Skyrme effective force. By fixing the three parameters of the model to reproduce the binding and symmetry energy of nuclear matter, we find that it allows a very satisfactory interpretation of the Skyrme force.

/pdf/quark-structure-and-nuclear-effective-forces-332i1m3naw.pdf

Pierre A.M. Guichon

Papers

How to reconcile the Rosenbluth and the polarization transfer methods in the measurement of the proton form factors.

The role of nucleon structure in finite nuclei

Hard Electroproduction of Photons and Mesons on the Nucleon

Virtual compton scattering and generalized polarizabilities of the proton

Quark Structure and Nuclear Effective Forces