Decay and electromagnetic production of strongly coupled quarkonia in pNRQCD

Abstract

We improve the pNRQCD approach to annihilation processes of heavy quarkonium and make first pNRQCD predictions for exclusive electromagnetic production of heavy quarkonium. We consider strongly coupled quarkonia, i.e., quarkonia that are not Coulombic bound states. Possible strongly coupled quarkonia include excited charmonium and bottomonium states. For these, pNRQCD provides expressions for the decay and exclusive electromagnetic production NRQCD matrix elements that depend on the wavefunctions at the origin and few universal gluon field correlators. We compute electromagnetic decay widths and exclusive production cross sections, and inclusive decay widths into light hadrons for $P$-wave quarkonia at relative order $v^2$ and leading order, respectively. We also compute the decay widths of $2S$ and $3S$ bottomonium states into lepton pairs and their ratios with the inclusive widths into light hadrons at relative order $v^2$.

50 pages, 4 figures, 12 tables, minor revisions, version published in JHEP

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Cited by in corpus (17)

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• Inclusive Hadroproduction of $P$-Wave Heavy Quarkonia in Potential Nonrelativistic QCD
• Inclusive Production of Heavy Quarkonia in pNRQCD
• Production and polarization of $S$-wave quarkonia in potential nonrelativistic QCD
• $\overline{\mathrm{MS}}$ renormalization of $S$-wave quarkonium wavefunctions at the origin
• Quarkonium propagation in the quark gluon plasma
• QCD Static Force in Gradient Flow
• $P$-wave quarkonium wavefunctions at the origin in the $\overline{\mathrm{MS}}$ scheme
• Operator product expansion for the non-local gluon condensate
• Spectroscopy of heavy-heavy flavour mesons and annihilation widths of quarkonia
• Nonlocal gluon condensates in QCD sum rules
• Resummation and renormalization of kinematical effects in inclusive $P$-wave quarkonium production
• QCD static force in gradient flow
• Color-octet nonrelativistic QCD matrix elements for heavy quarkonium decays in the refined Gribov-Zwanziger theory
• Quarkonium production in pNRQCD: the $P$-wave case
• Next-to-leading order analysis of $J/\psi +\gamma$ production in photon-photon collisions at CEPC