Relativistic corrections to the vector meson light front wave function
Lappi, T., Mäntysaari, H., & Penttala, J. (2020). Relativistic corrections to the vector meson light front wave function. Physical Review D, 102(5), Article 054020. https://doi.org/10.1103/PhysRevD.102.054020
Published inPhysical Review D
© 2020 Authors, Funded by SCOAP3.
We compute a light front wave function for heavy vector mesons based on long-distance matrix elements constrained by decay width analyses in the nonrelativistic 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 J / ψ 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 nonrelativistic 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.
PublisherAmerican Physical Society (APS)
Publication in research information system
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Related funder(s)Academy of Finland; European Commission
Funding program(s)Research costs of Academy Research Fellow, AoF; Postdoctoral Researcher, AoF; Academy Project, AoF
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about fundingThis work was supported by the Academy of Finland, Projects No. 314764 (H. M.), No. 321840 (T. L. and J. P.) and No. 314162 (J. P.). T. L. is supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. ERC-2015-CoG-681707).
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