Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 22 for “"vector mesons"”.
-
High energy photoproduction of rho and phi vector mesons
We have studied the photoproduction of p and phi vector mesons from hydrogen in the Fermilab broad band neutral beam. Forward going two particle final states were detected in a multiparticle spectrometer consistIng of two analyzing magnets, a multiwire-proportional-chamber tracking system and a …
-
Bound states in a system of two vector mesons
… major contribution to the forces between two p-mesons. Using dispersion relations techniques, we look for s-wave bound states between two such particles. vIe find three bound states in the 1.2 BeV region. These have the IJ PG assignments: 02++, 11++ and 00'1-+, \ve identify the f and the B .. …
-
High-Energy Photoproduction of the Rho and Rho' Vector Mesons
Made available in DSpace on 2015-05-13T15:22:08Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7803944.PDF: 4571254 bytes, checksum: 870aeca9f3117126034c37a4c1c6eea6 (MD5) Previous issue date: 1977
-
High energy photoproduction of the p and p' vector mesons
… for including transitions between different vector mesons in GVMD.
-
Pions and vector mesons at finite temperature from QCD sum rules
The temperature corrections to the current algebra Gell-Mann, Oakes and Renner(GMOR) relation in SU(2) X SU(2), the temperature behaviour of the pion mass and the q2 and T dependence of the ρππ vertex function in the space-like region are investigated.
-
A quantum field theory for the interaction of pions and rhos
… its particle content to include the charged rho vector mesons and the neutral pion meson. This entailed using the larger SU(2) gauge group. The masses for the vector mesons were generated via spontaneous symmetry breaking using the Higgs mechanism. The Lagrangian was then quantized and gauge …
-
Light vector meson production at forward rapidity in pp collisions at the LHC with the ALICE detector
Low-mass vector mesons (ρ,ω and Φ) give us information on the hot and dense state of strongly interacting matter produced in heavy ion collisions. In fact, in the QGP an enhancement of the strange particle production should be present (strangeness enhancement), which means a Nø/Nρ+ω ratio …
-
Application of the relativistic Schrödinger equation to the bootstrap problem
… is considered in a multichannel calculation. The vector mesons obtained are recombined with the pseudoscalars, and multichannel vector-pseudoscalar scattering is studied. The pseudoscalars themselves are obtained as bound states, as well as a set of axial vector meson resonances.
-
A study of Zweig's rule using phi mesons in a broad band neutral beam
A study of Zweig's rule using phi mesons in a high energy photon beam has been performed. Measurement of the ratio sigma (gamma A -> phi pi pi A) / sigma (gamma A -> omega pi pi A) = 0.10 ± 0.02 is taken as evidence that there is not as strong suppression as could be expected. Other ratios show …
-
Inclusive hadron production in electron-positron collisions with center-of-mass energies from 50 to 61.4 GeV
The K⁰, K*(892), p⁰(770) and Φ(1020) mesons along with the Λ° baryon have been observed in the TRISTAN energy region of 50 to 61.4 GeV using a data sample of 245.4 pb⁻¹. Their multiplicities and total cross sections are found and compared with the results from experiments at other center-of-mass …
-
Observation of structure in the phi phi system produced in radiative J/psi decays
… is observed in other radiative decays to two vector mesons and a photon. An upper limit is placed on the production of tensor glueball candidates observed to decay to ¢¢ by another experiment.
-
STARlight: A C++ Object-Oriented Monte Carlo Event Generator for Ultra-Peripheral Collisions
… other, producing a range of particles, including vector mesons and lepton pairs. In order to effectively study ultraperipheral collisions, a Monte Carlo event generator was created to simulate ultrarelativistic Au-Au interactions. This was initially written in FORTRAN in 1995, and used by the STAR …
-
Upgrades to the eSTARlight Monte Carlo Event Generator
… can produce a range of particles including vector mesons. The eSTARlight Monte Carlo event generator simulates these collisions and calculates the cross sections of vector meson production reactions. This thesis describes the upgrades I made to eSTARlight for better simulation of …
-
Some Aspects of Symmetry Breaking in Unified Weak-Electromagnetic Gauge Theories
… symmetry in such a way that all of the weak vector mesons acquire mass but the photon remains massless? In Chapter 4, in the context of a specific model, we study the effects on calculable quantities, such as the proton-neutron mass difference, of varying the Higgs content and investigate the …
-
Exclusive Production of Quarkonia and Generalized Parton Distributions
… exclusive photo and electroproduction of heavy vector mesons (the quarkonia J/ψ and ϒ), which can give access to the currently poorly constrained gluon distribution Eg. For this reason, we implemented a model for it with several variants in order to represent a spread of plausible distributions. …
-
Photoproduction of p0 Mesons in Ultra-Peripheral D-AU Collisions at RHIC
… Photoproduction can result in the creation of vector mesons like the rho meson. This work analyzes the deuterium-gold ultra-peripheral collision data collected during the 2016 run at the Relativistic Heavy Ion Collider (RHIC) to find the raw yield of the neutral rho meson, from which the cross …
-
Exclusive J/Ψ Vector-Meson production in high-energy nuclear collisions: a cross-section determinaton in the Colour Glass Condensate effective field theory and a feasibility study using the STARlight Monte Carlo event generator
The cross-section calculation for exclusive J /Ψ vector-meson production in ultra-peripheral heavy ion collisions is approached in two ways. First, the setup for a theoretical calculation is done in the context of the Colour Glass Condensate effective field theory. Rapidity-averaged n-point …
-
Nonperturbative dynamics of strong interactions from gauge/gravity duality
… to calculate form factors and wave functions of vector mesons and pions. As a result, we provide predictions of the electric radius, the magnetic and quadrupole moments which can be directly verified in lattice calculations or even experimentally. To find the anomalous pion form factor, we …
-
Topics in the generalized vector dominance model
This thesis covers two topics in the Generalized Vector Dominance Model. In the first topic we construct a model for dilepton production in hadron·hadron interactions based on the idea of generalized vectordominance. We argue that in the high-mass region the generalized vectordominance model and …
-
Exploring the quark-gluon content of hadrons: from mesons to nuclear matters
… functions as well as the pseudoscalar and vector meson masses. The exploration showed strong indications of possibly large contributions from the explicit inclusion of the gluon 3- and 4-point functions that are omitted in this and previous analyses. We then explore the possibility of ex- …
Page 1 of 2