A1 Journal article (refereed)
Relativistic corrections to the vector meson light front wave function (2020)


Lappi, Tuomas; Mäntysaari, Heikki; Penttala, Jani (2020). Relativistic corrections to the vector meson light front wave function. Physical Review D, 102 (5), 054020. DOI: 10.1103/PhysRevD.102.054020


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Publication details

All authors or editors: Lappi, Tuomas; Mäntysaari, Heikki; Penttala, Jani

Journal or series: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Publication year: 2020

Volume: 102

Issue number: 5

Article number: 054020

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevD.102.054020

Open Access: Open access publication published in a hybrid channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/71909

Web address of parallel published publication (pre-print): https://arxiv.org/abs/2006.02830


Abstract

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.


Keywords: particle physics

Free keywords: deep inelastic scattering; electron-ion collisions; nonrelativistic QCD; QCD in nuclear reactions; quantum chromodynamics


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Preliminary JUFO rating: 2


Last updated on 2020-28-09 at 12:16