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Showing 1 to 20 of 32 for “"Charmonium"”.
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Radiative Transitions in Charmonium
… this thesis, we analyse radiative transitions in charmonium using Lattice QCD, to provide insight into the internal structure and photocoupling of charmonium states. Distillation is used to allow the efficient computation of a high number of correlation functions, leading to the construction of …
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Comparison of Pion- and Proton-Production of Charmonium
Charmonium (chi) states produced in (pi)-beryllium interactions at 190 Gev/c and in proton-beryllium interactions at 200 Gev/c and 250 Gev/c have been observed via their decay into J/(PSI)+(gamma). This experiment was carried out with the Chicago Cyclotron Magnet Spectrometer at Fermilab. The …
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Charmonium and Charmed Mesons With Improved Lattice QCD
I present calculations of the properties of charmonium and charmed mesons with lattice QCD. The calculations use improved actions and 2+1 flavors of dynamical quarks. After a review of the relevant phenomenology, I provide an introduction to lattice techniques including the specific actions used in …
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Comparison of pion- and proton- production of charmonium
"Charmonium X states produced in pi--beryllium interactions at 190 Gev/c and in proton-beryllium interactions at 200 Gev/c and 250 Gev/c have been observed via their decay into J/'+y. This experiment was carried out with the Chicago Cyclotron Magnet Spectrometer at Fermilab. The fraction of J/""s …
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Charmonium production in ppÌ collisions at [radical]s = 1.8 TeV
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1997.
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Charmonium correlation and spectral functions in quenched lattice QCD at finite temperature
… thesis, we have investigated the properties of charmonium states at finite temperature in quenched QCD on isotropic lattices. The standard Wilson plaquette action for the gauge field and the non-perturbatively $cO(a)$ improved clover fermion action for charm quarks are implemented in the …
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Production of Charmonium States in 225 Gev/c Negative Pion Beryllium Interactions
… to perform a study of the hadronic production of charmonium. A 225 GeV/c negative pion beam was incident on a beryllium target. The trigger required a dimuon signature which favored opposite sign muon pairs with a large combined p(,(tau)). A search was then made for (chi) mesons of the charmonium …
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Production of charmonium states in 225 GeV/c pi-minus beryllium interactions
… to perform a study of the hadronic production of charmonium. A 225 GeV/c negative pion beam was incident on a beryllium target. The trigger required a dimuon signature which favored opposite sign muon pairs with a large combined PT. A search was then made for psi mesons of the charmonium spectrum …
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Shining a Light on the Nucleus: Photonuclear Measurements from Correlations to Charmonium
The atomic nucleus is comprised of a collection of nucleons (protons and neutrons), which are bound together by the nucleon-nucleon (NN) interaction that originates from Quantum Chromodynamics (QCD). While most nucleons experience the force from the rest of the nucleus as a single net “mean-field” …
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Measurement of the dipion mass spectrum in the decay X(3872) [right arrow] J/ [psi] [pi]⁺ [pi]⁻ at the CDFII experiment
… QCD multipole expansion predictions for various charmonium states, as well as to the hypothesis [right arrow] J/ [psi] po. We find that the measured spectrum is compatible with 3S1 charmonium decaying to J/ [psi] [pi]⁺ [pi]⁻ - and with the X(3872) - J/po hypothesis. There is, however, no 3S1 …
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Measurement Of Branching Fractions Of Rare Semi-Leptonic Ds Decays Ds → π0 L ν, Ds →ρ L ν, Ds →ks L ν (near ϒ (4s), ϒ (5s)) At Belle
… of charm quark and anti-charm quark are known as charmonium states. Different inspections of exotic charmonium states have been understood as 4-quark states. Charmonium states are produced via e+e− annihilation. We search at Belle, based on 119000 tagged events in the ϒ (4S) and ϒ (5S) energy …
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Probing parton distributions in proton using Drell-Yan and charmonium production in p + p and p + d interactions with 120 GeV proton beam at Fermilab
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Probing parton distributions in proton using Drell-Yan and charmonium production in p + p and p + d interactions with 120 GeV proton beam at Fermilab
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Resolution Studies for the Micro Vertex Detector of the PANDA Experiment and the Reconstruction of Charmed Mesons for Specific Hadronic Channels
… reactions such as the spectroscopy of the charmonium system. To ensure different studies of hadronic systems an universal detector is being designed, the PANDA detector. A high resolution Micro Vertex Detector (MVD), as part of the whole setup, is an important component of the track and …
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Determination of the X(3872) Meson Quantum Numbers
… of the candidates for a four-quark state is the charmonium-like state X(3872) which was first observed by the Belle experiment in 2003. This narrow state has a mass of about 3872 MeV which is located in a region of excited charmonium states (cc-bar). However its mass does not match to any …
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Applications of QCD sum rules at finite temperature
… the behaviour of hadronic parameters of charmonium in the scalar and pseudoscalar channel and also light-light quark mesons in the vector and axial-vector channel at finite temperature. From our results of the behaviour of the width and the hadronic coupling at finite temperature, both …
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Determination of the charm- and beauty-quark masses from QCD sum rules
… After confronting the experimental data in the charmonium and bottonium systems with theory, we obtain mc = 1.46 ± 0.07 GeV and mb = 4.70 ± 0.07 GeV. The error is due to the uncertainties in the values of Λ and the gluon condensate.
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Quarkonium Suppression in pPb Collisions at CMS and Timing Detectors for Future Collider Experiment
… surrounding medium. The excited-to-ground state charmonium cross-section ratio, 𝟁(2S)/J/𝟁, measured in pPb collisions at 8.16 TeV with the CMS detector, shows a statistically significant suppression of the prompt ratio with increasing multiplicity, representing the first such observation in …
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Observation of J/psi p resonances consistent with pentaquark states in Lambda_b^0 to J/psi K^- p decays
<p>The observation of structures consistent with charmonium-pentaquark states decaying to $J/\psi p$ in $\Lambda_b^0 \rightarrow J/\psi K^- p$ decays is presented. The data sample analyzed corresponds to an integrated luminosity of 3 $fb^{-1}$ acquired with the LHCb detector from 7 and 8 TeV $pp$ …
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