6533b829fe1ef96bd128a328
RESEARCH PRODUCT
Relativistic corrections to the vector meson light front wave function
Jani PenttalaTuomas LappiHeikki Mäntysaarisubject
Quarkelectron-ion collisionsMesonNuclear TheoryNuclear TheoryFOS: Physical scienceshiukkasfysiikka01 natural sciences114 Physical sciencesNuclear Theory (nucl-th)High Energy Physics - Phenomenology (hep-ph)deep inelastic scatteringquantum chromodynamics0103 physical sciencesVector meson010306 general physicsWave functionQuantum chromodynamicsPhysics010308 nuclear & particles physicsHERAFunction (mathematics)Rest frameHigh Energy Physics - Phenomenologynonrelativistic QCDQCD in nuclear reactionsQuantum electrodynamicsHigh Energy Physics::Experimentdescription
We compute a light front wave function for heavy vector mesons based on long distance matrix elements constrained by decay width analyses in the Non Relativistic QCD framework. Our approach provides a systematic expansion of the wave function in quark velocity. The first relativistic correction included in our calculation is found to be significant, and crucial for a good description of the HERA exclusive $\mathrm{J}/\psi$ production data. When looking at cross section ratios between nuclear and proton targets, the wave function dependence does not cancel out exactly. In particular the fully non-relativistic limit is found not to be a reliable approximation even in this ratio. The important role of the Melosh rotation to express the rest frame wave function on the light front is illustrated.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-09-22 |