Teses / dissertações sobre o tema "Particles (Nuclear physics) Chirality"
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Uwitonze, Pierre Celestin. "Assignment of spin and parity to states in the nucleus ¹⁹⁶T1". Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1017903.
Texto completo da fonteDetmold, William. "Nonperturbative approaches to quantum chromodynamics". Title page, contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phd4817.pdf.
Texto completo da fontePupin, Joel César [UNESP]. "Simetria quiral: fótons, píons e núcleons". Universidade Estadual Paulista (UNESP), 1994. http://hdl.handle.net/11449/132669.
Texto completo da fonteEste trabalho consiste no estudo do papel das simetrias quiral e de calibre eletromagnético, da constante 'g IND. A' e do tipo de acoplamento pion-núcleon em três processos: fotoprodução de um píon e de dois píons e interação fóton-núcleon. Os dois primeiros processos são tratados na aproximação em árvore, enquanto que no último são considerados também diagramas envolvendo um loop. O papel das simetrias é analisado investigando-se a existência de relações entre os vários diagramas de um dado processo. Já o papel do tipo de acoplamento pion-núcleon é analisado, comparando-se os resultados obtidos por meio de dois modelos de implementação da simetria quiral: o sigma linear e o não linear de Weinberg. Analogamente, o papel de 'g IND. A' é avaliado pela inspeção direta das expressões obtidas para os vários processos. Este estudo mostrou que, apenas no processo envolvendo dois píons externos a simetria quiral é relevante. Em particular, a simetria quiral é irrelevante para o fator de forma eletromagnético devido à nuvem piônica do núcleon, pelo menos no contexto das correções de um loop consideradas. Estes resultados constituem pontos de partida para o estudo mais abrangente do papel da simetria quiral em abordagens não perturbativas, tais como a do modelo de Skyrme
In this Work we study the role played by chiral and electromagnetic gauge symmetries, the weak constant 'g IND. A' and pion-nucleon couplings in three processes; single and double pion photo production and photon-nucleon interaction. The first two of them are treated at tree levei, whereas the last one includes one loop corrections. The role of the symmetries is analyzed considering the existence of relationships among various diagrams contributing to a given process. The influence of the way pions couple to nucleons is studied by comparing results obtained by means of the linear sigma model and the non linear model proposed by Weinberg. Finally, the role of 'g IND. A' is assessed by direct inspection of formal expressions. Our study showed that chiral symmetry is relevant only for double pion photo production. In particular, chiral symmetry does not influence the pion cloud contribution to the electromagnetic nucleon form factor, at least within the one loop approximation considered. These results pave the way for more comprehensive studies of the role of chiral symmetry in non perturbative approaches, such as the Skyrme model
Pupin, Joel César. "Simetria quiral: fótons, píons e núcleons /". São Paulo, 1994. http://hdl.handle.net/11449/132669.
Texto completo da fonteBanca: Fernando Silveira Navarro
Banca: Bruto Max Pimentel Escobar
Resumo: Este trabalho consiste no estudo do papel das simetrias quiral e de calibre eletromagnético, da constante 'g IND. A' e do tipo de acoplamento pion-núcleon em três processos: fotoprodução de um píon e de dois píons e interação fóton-núcleon. Os dois primeiros processos são tratados na aproximação em árvore, enquanto que no último são considerados também diagramas envolvendo um loop. O papel das simetrias é analisado investigando-se a existência de relações entre os vários diagramas de um dado processo. Já o papel do tipo de acoplamento pion-núcleon é analisado, comparando-se os resultados obtidos por meio de dois modelos de implementação da simetria quiral: o sigma linear e o não linear de Weinberg. Analogamente, o papel de 'g IND. A' é avaliado pela inspeção direta das expressões obtidas para os vários processos. Este estudo mostrou que, apenas no processo envolvendo dois píons externos a simetria quiral é relevante. Em particular, a simetria quiral é irrelevante para o fator de forma eletromagnético devido à nuvem piônica do núcleon, pelo menos no contexto das correções de um loop consideradas. Estes resultados constituem pontos de partida para o estudo mais abrangente do papel da simetria quiral em abordagens não perturbativas, tais como a do modelo de Skyrme
Abstract: In this Work we study the role played by chiral and electromagnetic gauge symmetries, the weak constant 'g IND. A' and pion-nucleon couplings in three processes; single and double pion photo production and photon-nucleon interaction. The first two of them are treated at tree levei, whereas the last one includes one loop corrections. The role of the symmetries is analyzed considering the existence of relationships among various diagrams contributing to a given process. The influence of the way pions couple to nucleons is studied by comparing results obtained by means of the linear sigma model and the non linear model proposed by Weinberg. Finally, the role of 'g IND. A' is assessed by direct inspection of formal expressions. Our study showed that chiral symmetry is relevant only for double pion photo production. In particular, chiral symmetry does not influence the pion cloud contribution to the electromagnetic nucleon form factor, at least within the one loop approximation considered. These results pave the way for more comprehensive studies of the role of chiral symmetry in non perturbative approaches, such as the Skyrme model
Mestre
Manzoni, Luiz ALberto. "Simetria quiral, modelos de quarks e espalhamento píon-píon no formalismo fock-tani /". São Paulo, 1995. http://hdl.handle.net/11449/132721.
Texto completo da fonteBanca: Vicente Pleitez
Banca: Manoel Roberto Robilotta
Resumo: Consideramos modelos de quarks quirais para estudar o espalhamento 'PI-PI' a baixas energias. A quebra dinâmica da simetria quiral é estudada através do método variacional de Bogoliubov-Valatin. Dentro deste esquema, a estrutura de quarks dos pions considerados como bosons de Goldstone é obtida. Através do formalismo Fock-Tani obtemos um Hamiltoniano efetivo em termos dos graus de liberdade piônicos e a partir deste obtemos a amplitude de espalhamento 'PI-PI' no limiar. Usando a propriedade de "crossing" da matriz de espalhamento, o resultado é estendido para energias além do limiar. O resultado concorda com aquele obtido por Weinberg no contexto da álgebra de correntes
Abstract: We consider chiral quark models to study 'PI-PI' scattering at low energies. The dynamical chiral symmetry breaking is studied by means of the Bogoliubov-Valatin variational method. Within such a scheme, the quark structure of the pions considered as Goldstone bosons is obtained. By means of the Fock-Tani formalism we obtain an effective Hamiltonian in terms of pion degrees of freedom and from this we obtain the 'PI-PI' scattering matrix at threshold. Using the crossing property of the scattering matrix, the result is extended to energies beyond threshold. The result agrees with the one obtained by Weinberg in context of current algebra
Mestre
Plum, Eric. "Chirality and metamaterials". Thesis, University of Southampton, 2010. https://eprints.soton.ac.uk/301296/.
Texto completo da fonteQureshi, Babar Ahmed. "Symmetries in noncommutative physics". Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2008. http://wwwlib.umi.com/cr/syr/main.
Texto completo da fonteDorjkhaidav, Orlokh Stone Sheldon. "Upper limit for electron-positron decaying to neutral Lambda(baryon)-antineutral Lamba(baryon) cross section and R in the center-of-mass energy range from 11.230 to 11.382 GeV". Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2004. http://wwwlib.umi.com/cr/syr/main.
Texto completo da fonteNasri, Salah Schechter Joseph. "Neutrinos in particle physics and cosmology". Related Electronic Resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2003. http://wwwlib.umi.com/cr/syr/main.
Texto completo da fonteMudau, Lufuno Julia. "Emission of ³He ⁴He and ⁶He particles produce from the interaction of ¹²C with ⁹³Nb at 400 MeV incident energy". Thesis, University of the Western Cape, 2005. http://hdl.handle.net/11394/1903.
Texto completo da fonteThe inclusive double di®erential cross sections of 3He, 4He, and 6He par- ticles produced from the interaction of 12C with 93Nb at 400 MeV incident energy were extracted from the prescaled singles spectra which were mea- sured in conjunction with the correlation between 8Be fragments and ® par- ticles. A further aim of this project was to test the detector e±ciencies and energy calibrations by comparing the alpha and 8Be prescaled singles data with existing inclusive cross sections of the same reaction. The absolute cross sections of 3He and 6He fragments have been extracted based on the absolute normalization of the alpha particle spectra. A study of the inclusive spectra of 3He and 6He suggest similar features to those seen in the alpha particle spectra. These features are described by the projectile break-up and nucleon coalescence mechanisms. A theoretical model which takes both these mech- anisms into account was applied to describe 3He and 6He fragments. The model is able to reproduce reasonably well the inclusive energy spectra of the 3He and 6He fragments. These results are found to be consistent with previous studies of the emission of intermediate mass fragments.
South Africa
Ellenburg, Michael Glen. "Massless particles in a class of field theories". Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/28022.
Texto completo da fonteWalston, Sean Eric. "Heavy flavor decays of the Z⁰ and a search for flavor changing neutral currents /". wwwlib.umi.com/cr/uoregon/fullcit?p3136452 view abstract or download file of text, 2004.
Encontre o texto completo da fonteTypescript. Includes vita and abstract. Includes bibliographical references (leaves 254-261). Also available for download via the World Wide Web; free to University of Oregon users.
Bissey, François René Pierre. "Structure functions in the three nucleon system /". Title page, contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phb6228.pdf.
Texto completo da fonteKolb, Jeffrey A. "A search for neutrinoless tau decays to three leptons /". Connect to title online (Scholars' Bank) Connect to title online (ProQuest), 2008. http://hdl.handle.net/1794/8333.
Texto completo da fonteTypescript. Includes vita and abstract. Includes bibliographical references (leaves 136-140). Also available online in Scholars' Bank; and in ProQuest, free to University of Oregon users.
Eggers, Hans Christoph. "Intermittency, moments and correlations in distributions of particles created in high-energy collisions". Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185422.
Texto completo da fonteBarros, Cristian Javier Caniu. "Alpha Particles in Effective Field Theory". Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-13012015-131131/.
Texto completo da fonteNesta tese, nós trabalhamos sobre o problema do sistema de duas partículas alfa utilizando uma teoria de campos efetiva. O nosso objetivo é abordar os observáveis e a ressonância do sistema alfa-alfa de baixa energia identificada como o estado fundamental do berílio-8. Neste trabalho nós começamos com uma teoria de campo efetiva em que os graus de liberdade são as partículas alfa interagindo via forças de contato dependentes do momento. Estes, em contraste com as forças que são dependentes da energia, são mais úteis na extensão da teorias para sistemas com mais de duas partículas alfa. Além disso, forças dependentes do momento nos permitem abordar restrições causais nos observáveis, conhecidas como causalidade de Wigner. Nós apresentamos nossos cálculos para o sistema alfa-alfa.
Karamov, Sergey Alexandrovich Catterall Simon. "Supersymmetric theories on the lattice". Related Electronic Resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2003. http://wwwlib.umi.com/cr/syr/main.
Texto completo da fonteEmam, Waled S. Souder Paul. "A search for new physics at the TeV scale via a precise measurement of the weak mixing angle in Moller scattering". Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2004. http://wwwlib.umi.com/cr/syr/main.
Texto completo da fonteKurkcuoglu, Seckin Balachandran A. P. "Explorations in fuzzy physics and non-commutative geometry". Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2004. http://wwwlib.umi.com/cr/syr/main.
Texto completo da fonteTonguc, Baris Tamer Souder Paul A. "A measurement of parity-violating asymmetry with polarized electrons scattered from protons and implications for strange form factors". Related Electronic Resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2003. http://wwwlib.umi.com/cr/syr/main.
Texto completo da fonteYounus, Imran Souder Paul. "First observation of the parity violating asymmetry in Moller scattering". Related Electronic Resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2003. http://wwwlib.umi.com/cr/syr/main.
Texto completo da fonteMuramatsu, Hajime Skwarnicki Tomasz. "Photon spectroscopy of heavy quarkonia". Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2004. http://wwwlib.umi.com/cr/syr/main.
Texto completo da fonteCabrera, Palmer Belkis. "Supertubes, black strings and D-brane systems". Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2005. http://wwwlib.umi.com/cr/syr/main.
Texto completo da fonteButt, Jamila Bashir. "First Observation of psi(3770) decays to photon chi(cJ)". Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2006. http://proquest.umi.com/login?COPT=REJTPTU0NWQmSU5UPTAmVkVSPTI=&clientId=3739.
Texto completo da fonteZhang, Hongshan (Kevin). "First measurements of the exclusive decays of the upsilon(5S) to B* meson B* bar meson pion pion final states and improved B*(s) meson mass measurements". Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2006. http://proquest.umi.com/login?COPT=REJTPTU0NWQmSU5UPTAmVkVSPTI=&clientId=3739.
Texto completo da fonteWhittal, David Mark. "Quasifree knockout of charged particles from ⁴He with 100 MeV protons". Doctoral thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/17248.
Texto completo da fonteExclusive measurements have been made of the reactions ⁴He(p,2p ), (p,pd), (p,pt) and (p,ph) at 100 MeV. The primary protons were measured at two angles, 45° and 60°, in coincidence with secondary protons, deuterons, tritons or helions covering a wide range of angles on the opposite side of the beam, from -15° to -90° in plane, and from 0° to 30° out-of-plane. The purpose of the experiment was to explore the validity of the Distorted Wave Impulse Approximation (DWIA) as a description of these quasifree knockout reactions, at all geometries where the knockout cross section is significant. Six particle telescopes, each consisting of two silicon detectors and a NaI detector, were used to measure the coincident particles. The experimental data are presented in the form of energy-sharing distributions, which were generated by projecting the two-dimensional quasifree knockout loci onto the energy axis of the primary proton. The comparison between these energy-sharing distributions and the curves calculated by means of the DWIA is satisfactory for all geometries, except at the most forward secondary angles for the (p,pt) and (p,ph) reactions. It is concluded that the DWIA is an adequate formalism for modelling the quasifree knockout reactions induced by 100 MeV protons on ⁴He. Based on this conclusion, the total contribution of quasifree knockout to the existing inclusive (p,p') spectra has been calculated by integrating the DWIA cross sections over the solid angles of the secondary particles. The spectroscopic factors used were those extracted from the coincidence data. For the (p,pn) reaction, it was assumed that the spectroscopic factors were the same as for (p,2p). It is found that 70 ± 10% of the inclusive continuum yields is attributable to quasifree scattering, with ~30% arising from multiple scattering. At low energies of the scattered proton, the knockout of nucleons constitutes over 90% of the quasifree component, whereas at high energies the knockout of deuterons, tritons and helions dominates the yield. Thus the absence of discernable quasifree peaks in the inclusive spectra is probably due to the cluster knockout contributions filling in the yield at higher energies.
Nisar, Shabana. "Branching fraction measurements and SU(3) diagrammatic analysis of Cabibbo-suppressed D meson decays". Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2007. http://wwwlib.umi.com/cr/syr/main.
Texto completo da fonteDujmić, Denis. "Open charm production at HERA-B". Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3036594.
Texto completo da fonteFrederiksen, Joorgen Segerlund. "Theoretical studies in high energy physics and atmospheric dynamics /". Title page, introduction and contents only, 1987. http://web4.library.adelaide.edu.au/theses/09SD/09sdf852.pdf.
Texto completo da fonteRyan, Daniel Edward. "Direct searches for scalar leptoquarks at the Run II Tevatron /". Thesis, Connect to Dissertations & Theses @ Tufts University, 2004.
Encontre o texto completo da fonteAdviser: Krzysztof Sliwa. Submitted to the Dept. of Physics. Includes bibliographical references (leaves 131-138). Access restricted to members of the Tufts University community. Also available via the World Wide Web;
Thompson, David Ian. "Low energy consequences of some non-standard Higgs models". Connect to e-thesis, 2007. http://theses.gla.ac.uk/143/.
Texto completo da fontePh.D. thesis submitted to the Department of Physics and Astronomy, Faculty of Physical Sciences, University of Glasgow, 2007. Includes bibliographical references. Print version also available.
Miletic, Tatjana Lane C. E. "Search for the disappearance of a neutron with KamLAND detector /". Philadelphia, Pa. : Drexel University, 2009. http://hdl.handle.net/1860/3129.
Texto completo da fonteOo, U. Ne. "A chiral symmetric calculation of pion-nucleon scattering /". Title page, table of contents and abstract only, 1993. http://web4.library.adelaide.edu.au/theses/09PH/09pho59.pdf.
Texto completo da fonteLi, Yuan. "Triaxial strongly deformed band and high spin states in 168Lu". Master's thesis, Mississippi State : Mississippi State University, 2003. http://library.msstate.edu/etd/show.asp?etd=etd-03132003-141252.
Texto completo da fontePatel, Sunil. "A study of heavy quark production and semi-leptonic decay in deep-inelastic ep scattering at high energies". Thesis, University of Oxford, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670155.
Texto completo da fonteStriley, David L. "Large transverse momentum [pi]⁰ meson production by 0.5 TeV/c p, [pi]+ and K+ incident on beryllium /". free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9737874.
Texto completo da fonteTorres, Sergio. "Observation of K* (2060) in the [phi]K[pi] final state produced in proton-nuclei interactions at 400 GeV/c". Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/49943.
Texto completo da fontePh. D.
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Day, Francesca. "Astrophysical signatures of axion-like particles". Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:215f6432-6dbb-4a16-80d8-3ad0bc76ec2d.
Texto completo da fontePais, Preema R. "Reducing background in the t neutrino mass limiting decay t [plus or minus] --> K [plus or minus] Ks̳p0̳̳vt̳ /". Connect to online version, 2006. http://ada.mtholyoke.edu/setr/websrc/pdfs/www/2006/174.pdf.
Texto completo da fontePorcelli, Tracy Ann. "Measurements of muon catalyzed dt fusion in solid HD". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ37360.pdf.
Texto completo da fonteLepeintre, François. "Supersymmetric models of flavor /". Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/9699.
Texto completo da fonteGammal, Arnaldo. "O Termo Sigma Nuclear no Modelo de Skyrme". Universidade de São Paulo, 1997. http://www.teses.usp.br/teses/disponiveis/43/43132/tde-04122013-164120/.
Texto completo da fonteThe nuclear sigma term, the isoscalar quark content of the nuclear state, is calculated within the Skyrme model considering the current quark mass dependence of the nucleon-nucleon potential. The nuclear sigma term is extracted from the nuclear mass using the Hellmann-Feynman theorem, which demands for the derivative of the nucleon-nucleon interaction, m IND.q V IND.NN/ m IND.q, with respect to the up-down quark masses, The potential is evaluated in the skyrmion-skyrmion picture within the quantized product anstatz. The quark mass dependence of the potential comes from the pion mass term in the Skyrme Lagrangian. Such connection is made using the Gell-Mann, Oakes and Renner relation. We provide a discussion on how m IND.q V IND.NN/ m IND.q should enter in the evaluation of the nuclear sigma-term in the context of nonrealativistic quantum mechanics. We also calculate the nucleon sigma term, and the derivatives of the pion-nucleon coupling constant, axial charge, electromagnetic radius and magnetic moments. Considering the contribution of the potential to the nuclear matter sigma term, the local value quark condensate drops only 5% at normal density. The problem of missing repulsion in the magnitude of the real part of the isoscalar s-wave pion nucleus optical potential, as taken from pionic atom and elastic scattering data analysis, is fixed in the present context. The contribution of the skyrmion-skyrmion potential to the nuclear sigma term, provides the missing repulsion to the pion-nucleus optical potential, in remarkable agreement with the fitted parameters and also reproducing its mass dependence.
Brunelli, Jose Carlos. "Renormalização na quantização estocástica de teorias de campos". Universidade de São Paulo, 1991. http://www.teses.usp.br/teses/disponiveis/43/43132/tde-26022014-144556/.
Texto completo da fonteIn the stochastic quantization scheme of Parisi and Wu we study the renormalization of the stochastic theory of some models in field theory. Following the path integral approach for stochastic process we perform the 1/ N expansion of the nonlinear sigma model and, using a Ward identity obtained, from a BRS symmetry of the effective action of this formulation, we show the renormalizability of the model. Using the Langevin approach for stochastic process we study the renormalizability of the massive Thirring model showing perturbativaly the vanishing of the renormalization group\'s beta function at finite fictitious time.
Tilles, P. F. C. [UNESP]. "Quantização de partículas com spin". Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/138360.
Texto completo da fonteUma partícula clássica relativística é descrita utilizando-se o formalismo de Dirac para sistemas vinculados devido à invariança sob transformações de reparametrizações requerida por uma teoria explícitamente covariante. Nós introduzimos os graus de liberdade de spin via variáveis de Grassman, que levam diretamente ao conceito de supersimetria presente na teoria. As equações de movimento e a quantização são consideradas tanto para as teorias livres de spin 0 e 1/2, como para a teoria com interação eletromagnética. A álgebra dos vínculos de primeira classe é extendida para descrever partículas de spin N/2, que incluem as representações de spin 1. A teoria quântica obtida é comparada com a teoria clássica de campos
Aclassical relativistic particleis described by means of Dirac's formalism for constrained systems, where the constraints come from the reparametrization invariance required by an explicitly covariant theory. We introduce spin degrees of freedom via Grassman variables, which leads directly to the concept of supersymmetry in the theory. The equations of motion and quantization are considered both for the spin 0 and 1/2 free theories, and for the eletromagnetic interaction. The first class constraints algebra is extended to describe spin N/2 particles, which include spin 1 representations. The quantum theory obtained is compared to the classical theory of fields
Tilles, Paulo Fernando Coimbra. "Quantização de partículas com spin /". São Paulo, 2007. http://hdl.handle.net/11449/138360.
Texto completo da fonteBanca: Bruto Max Pimentel Escobar
Banca: Ricardo Ivan Medina Bascur
Resumo: Uma partícula clássica relativística é descrita utilizando-se o formalismo de Dirac para sistemas vinculados devido à invariança sob transformações de reparametrizações requerida por uma teoria explícitamente covariante. Nós introduzimos os graus de liberdade de spin via variáveis de Grassman, que levam diretamente ao conceito de supersimetria presente na teoria. As equações de movimento e a quantização são consideradas tanto para as teorias livres de spin 0 e 1/2, como para a teoria com interação eletromagnética. A álgebra dos vínculos de primeira classe é extendida para descrever partículas de spin N/2, que incluem as representações de spin 1. A teoria quântica obtida é comparada com a teoria clássica de campos
Abstract: Aclassical relativistic particleis described by means of Dirac's formalism for constrained systems, where the constraints come from the reparametrization invariance required by an explicitly covariant theory. We introduce spin degrees of freedom via Grassman variables, which leads directly to the concept of supersymmetry in the theory. The equations of motion and quantization are considered both for the spin 0 and 1/2 free theories, and for the eletromagnetic interaction. The first class constraints algebra is extended to describe spin N/2 particles, which include spin 1 representations. The quantum theory obtained is compared to the classical theory of fields
Mestre
Kvasnikova, Ioulia. "Mesonic sources of dileptons in ultrarelativistic nuclear collisions". Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37753.
Texto completo da fonteA systematic study of light meson contributions is performed. The most significant decay and reaction contributions are calculated and summed for low and intermediate invariant mass dileptons. The calculated dilepton rate is compared to that obtained using spectral functions extracted from data, and it is shown that the chosen set of mesonic reactions and decays accounts for all significant contributions to the thermal dilepton emission.
A hydrodynamic approach to the space-time evolution of the hot medium formed as a result of a central heavy ion collision at ultra-relativistic energies is considered. A theoretical curve of intermediate invariant mass dilepton spectrum is computed and compared to the NA50 data from central Pb(158 AGeV)+Pb collisions. Experimental acceptance cuts are accounted for. Drell-Yan processes are considered as well. We find that our thermal dileptons account for the intermediate mass excess observed by the NA50 Collaboration. We see no need to invoke charm enhancement. Predictions for the future experiments at RHIC and are made.
Jin, Daming. "Off line computer analysis of total cross section for proton nucleus collisions at 400 Gev/C proton beam energy on a VAX system and conversion to a Z-386 PC system". Virtual Press, 1991. http://liblink.bsu.edu/uhtbin/catkey/834638.
Texto completo da fonteDepartment of Physics and Astronomy
Alton, Andrew K. "Evidence for the existence of jets in photon-parton interaction events at center of mass energies from 18 to 28 GEV". Virtual Press, 1995. http://liblink.bsu.edu/uhtbin/catkey/1014850.
Texto completo da fonteDepartment of Physics and Astronomy
Hosack, Michael G. "Optimization of particle tracking for experiment E683 at Fermi National Laboratory". Virtual Press, 1995. http://liblink.bsu.edu/uhtbin/catkey/941370.
Texto completo da fonteDepartment of Physics and Astronomy
De, Felice Antonio. "The accelerating universe and other cosmological aspects of modified gravity models". Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2005. http://wwwlib.umi.com/cr/syr/main.
Texto completo da fonte