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Showing 1 to 4 of 4 for “"NRQCD"”.
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The application of automated perturbation theory to lattice QCD
… an effective theory, nonrelativistic QCD (NRQCD), is used to discretise the heavy quarks. High precision simulations are required so systematic uncertainties are removed by improving the NRQCD action. Precise simulations also require improved sea quark actions, such as the highly-improved …
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Bottomonium Spectroscopy at Belle: Studies of Radiative and Hadronic Transitions
… to study nonrelativistic quantum chromodynamics (NRQCD), as the kinematic threshold for production of an $omega$ and $Upsilon(1S)$ lies between the $J=0$ and $J=1$ states. The results presented herein constitute the first confirmation measurement of the $omega$ transitions of the $chi_{bJ}(2P)$ …
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J/ψ production and polarization with the inclusion of transverse momentum effects
… hadronization models: the non-relativistic QCD (NRQCD) approach and the Color-Singlet Model (CSM). Quite remarkably, in the small transverse momentum region these parameters are sensitive to the transverse momentum dependent (TMD) distributions of gluons inside the proton. We then propose a …
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Measurement of J/ψ meson production in association with a W [superscript ±] boson in pp data at 13 TeV collected by the ATLAS experiment
This dissertation presents a measurement of the production cross-section of J/ψ mesons in association with a W [superscript ±] boson in √s = 13 TeV pp collisions by the ATLAS experiment, using 139 fb⁻¹ of integrated luminosity produced by the Large Hadron Collider at CERN. Events are selected with …