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You searched for subject:(Espalhamento difrativo). Showing records 1 – 3 of 3 total matches.

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Universidade Estadual de Campinas

1. Soares, Mara Senghi. Análise fenomenológica da produção difrativa de W's e dijatos em colisões hadrônicas a altas energias.

Degree: 2001, Universidade Estadual de Campinas

Abstract: Hadronic processes in which hard diffractive production takes place have been observed and analyzed in collider experiments for several years. The experimental rates of diffractive W 's and dijets measured at the Tevatron and the cross sections of diffractively produced dijets obtained at the HERA experiment are the object of the present analysis. Firstly, it is attempted to use the Pomeron structure function obtained from HERA data by using the Ingelman-Schlein model to calculate the rates and cross sections for these processes. The comparison of theoretical predictions with the measured values revealed some discrepancies, making evident certain conceptual difficulties with such an approach. Compatibility between experiment and theory has been achieved only when the analysis was restricted to hadron collision data from the Tevatron Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Covolan, Roberto José Maria, 1955- (advisor), Universidade Estadual de Campinas. Instituto de Física Gleb Wataghin (institution), Programa de Pós-Graduação em Física (nameofprogram), Navarra, Fernando Silveira (committee member), Santoro, Alberto Franco de Sa (committee member), Chinellato, Carola Dobrigkeit (committee member), Escobar, Carlos Ourivio (committee member).

Subjects/Keywords: Espalhamento difrativo; Partículas - Difração; Espalhamento (Física)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Soares, M. S. (2001). Análise fenomenológica da produção difrativa de W's e dijatos em colisões hadrônicas a altas energias. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/277045

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Soares, Mara Senghi. “Análise fenomenológica da produção difrativa de W's e dijatos em colisões hadrônicas a altas energias.” 2001. Thesis, Universidade Estadual de Campinas. Accessed January 17, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277045.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Soares, Mara Senghi. “Análise fenomenológica da produção difrativa de W's e dijatos em colisões hadrônicas a altas energias.” 2001. Web. 17 Jan 2021.

Vancouver:

Soares MS. Análise fenomenológica da produção difrativa de W's e dijatos em colisões hadrônicas a altas energias. [Internet] [Thesis]. Universidade Estadual de Campinas; 2001. [cited 2021 Jan 17]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/277045.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Soares MS. Análise fenomenológica da produção difrativa de W's e dijatos em colisões hadrônicas a altas energias. [Thesis]. Universidade Estadual de Campinas; 2001. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/277045

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Silva, Paulo Victor Recchia Gomes da, 1989-. Phenomenological analyses on hadronic cross-sections at high and asymptotic energies = Análises fenomenológicas de seções de choque hadrônicas em energias altas e assintóticas: Análises fenomenológicas de seções de choque hadrônicas em energias altas e assintóticas.

Degree: 2017, Universidade Estadual de Campinas

Abstract: Quantum Chromodynamics (QCD) constitutes the quantum field theory of the strong interaction. Despite the success of this theory in the description of several processes involving hadrons, the elastic scattering is still a theoretical challenge. This process is characterized by a small transferred momentum and, in this range, the perturbative techniques are not applicable. Although nonperturbative results have been obtained in recent years, we still do not have a full description within QCD of the quantities related to the elastic scattering, valid for all the energies and transferred momentum, for example, the total cross section (σtot), the ρ parameter, the elastic cross section (σel) and the differential cross section. The attempts to describe experimental data rely on empirical and phenomenological approaches such as Regge-Gribov Formalism and QCD inspired models. Since the start of Run 1 at the LHC, we have the opportunity to study the quantities above in the largest energies available in accelerator experiments, namely 7 and 8 TeV for proton-proton (pp) scattering. In this thesis, the main interest is in the energy dependence of three quantities, the ratio X=σel/σtot, the σtot and the ρ parameter, namely the behaviour at high and asymptotic energies, as well as the influence of sub-leading contributions to σtot. These topics are divided into three different, but complementary studies, involving empirical, phenomenological and theoretical aspects. In the first topic, we develop an empirical analysis on the ratio σel/σtot, a quantity related to the profile function at impact parameter zero (the hadronic central opacity). By means of suitable parameterizations, with a small number of free parameters, we have obtained good descriptions of the experimental data on pp and antiproton-proton (\ppbar) data. From the fits with four variants, we conclude that the asymptotic black-disk scenario is not a unique solution and, moreover, the results favour a grey-disk scenario. In the second topic, we study the rise of σtot with the energy through parameterizations based on the Regge-Gribov formalism and we consider two options for the leading terms: a log-square and a log-raised-to-γ, with γ a free fit parameter. In addition, we discuss two analytic methods to connect the real and imaginary parts of the elastic scattering amplitude, namely Derivative Dispersion Relations (DDR) and Asymptotic Uniqueness (AU), which lead to different parameterizations for σtot and the ρ parameter; these differences are critically discussed. The results favour the DDR method in both formal and practical contexts. The recent tension between the TOTEM and ATLAS data at 7 and 8 TeV is discussed and considered in the data reductions. In the third topic, two sub-leading terms for σtot, obtained in a nonperturbative QCD approach to the elastic scattering, are considered in fits to pp and \ppbar data and also in fits to data from… Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Menon, Marcio José, 1952- (advisor), Universidade Estadual de Campinas. Instituto de Física Gleb Wataghin (institution), Programa de Pós-Graduação em Física (nameofprogram), Chinellato, Carola Dobrigkeit (committee member), Aguilar, Arlene Cristina (committee member), Natale, Adriano Antonio (committee member), Gonçalves, Victor Paulo Barros (committee member).

Subjects/Keywords: Física de altas energias; Partículas (Física nuclear); Interações hadrônicas; Espalhamento elástico; Espalhamento difrativo; High energy physics; Particles (Nuclear physics); Hadronic interactions; Elastic scattering; Diffractive scattering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Silva, Paulo Victor Recchia Gomes da, 1. (2017). Phenomenological analyses on hadronic cross-sections at high and asymptotic energies = Análises fenomenológicas de seções de choque hadrônicas em energias altas e assintóticas: Análises fenomenológicas de seções de choque hadrônicas em energias altas e assintóticas. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/331036

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Silva, Paulo Victor Recchia Gomes da, 1989-. “Phenomenological analyses on hadronic cross-sections at high and asymptotic energies = Análises fenomenológicas de seções de choque hadrônicas em energias altas e assintóticas: Análises fenomenológicas de seções de choque hadrônicas em energias altas e assintóticas.” 2017. Thesis, Universidade Estadual de Campinas. Accessed January 17, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/331036.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Silva, Paulo Victor Recchia Gomes da, 1989-. “Phenomenological analyses on hadronic cross-sections at high and asymptotic energies = Análises fenomenológicas de seções de choque hadrônicas em energias altas e assintóticas: Análises fenomenológicas de seções de choque hadrônicas em energias altas e assintóticas.” 2017. Web. 17 Jan 2021.

Vancouver:

Silva, Paulo Victor Recchia Gomes da 1. Phenomenological analyses on hadronic cross-sections at high and asymptotic energies = Análises fenomenológicas de seções de choque hadrônicas em energias altas e assintóticas: Análises fenomenológicas de seções de choque hadrônicas em energias altas e assintóticas. [Internet] [Thesis]. Universidade Estadual de Campinas; 2017. [cited 2021 Jan 17]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/331036.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Silva, Paulo Victor Recchia Gomes da 1. Phenomenological analyses on hadronic cross-sections at high and asymptotic energies = Análises fenomenológicas de seções de choque hadrônicas em energias altas e assintóticas: Análises fenomenológicas de seções de choque hadrônicas em energias altas e assintóticas. [Thesis]. Universidade Estadual de Campinas; 2017. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/331036

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Universidade Estadual de Campinas

3. Carvalho, Sergio Antenor de. Calculo dos Campos eletromagneticos gerados pela interação de um corpo tridimensional com uma onda eletromagnetica usando o metodo dos momentos e funções de base solenoidais.

Degree: 1998, Universidade Estadual de Campinas

Abstract: This work deals with the use of a volume formulation to calculate the field distribution of tridimensional bodies. We use the equivalente principle to obtain, from Maxwell's equations, an integral equation that relates the equivalent volume polarization currents to the incident field. The method of moments is applied to transform the integral equation into a system of algebraic equations that can be solved numerically. To apply the method of moments we first expand the equivalent currents in terms of solenoidal basis functions. These functions do not generate spurious charges inside the homogeneous portion of body so we can apply this method to the bodies with high values of dielectric constant. The functions are defined on tetrahedrons permitting a better fitting of the object to be discretized. As far as we know, this is the first time that these functions are used to analyze time-harmonic problems. A new iterative method of solution of the integral equation is developed. The method consists in the division of the body in parts, with every part being characterized by a matrix moment that determines the induced field by excitation. The entire solution is built by interaction among the parts with the incident field like initial excitation. We present results showing the effectiveness of the formulation with the use of solenoidal iunctions. We analyze scattering by homogeneous and inhomogeneous dielectric cube, homogeneous and inhomogeneous sphere and by ensemble of cubes. The results are in good agreement with results found in the published literature and with those obtained using pulse basis functions. In the case of the sphere we compare the results with those obtained using the Mie's series Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Mendes, Leonardo de Souza, 1961- (advisor), Universidade Estadual de Campinas. Faculdade de Engenharia Elétrica e de Computação (institution), Programa de Pós-Graduação em Engenharia Elétrica (nameofprogram).

Subjects/Keywords: Maxwell, Equações de; Espalhamento (Física); Espalhamento difrativo; Equações integro-diferenciais - Soluções numéricas; Métodos iterativos (Matemática)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Carvalho, S. A. d. (1998). Calculo dos Campos eletromagneticos gerados pela interação de um corpo tridimensional com uma onda eletromagnetica usando o metodo dos momentos e funções de base solenoidais. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/260946

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Carvalho, Sergio Antenor de. “Calculo dos Campos eletromagneticos gerados pela interação de um corpo tridimensional com uma onda eletromagnetica usando o metodo dos momentos e funções de base solenoidais.” 1998. Thesis, Universidade Estadual de Campinas. Accessed January 17, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260946.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Carvalho, Sergio Antenor de. “Calculo dos Campos eletromagneticos gerados pela interação de um corpo tridimensional com uma onda eletromagnetica usando o metodo dos momentos e funções de base solenoidais.” 1998. Web. 17 Jan 2021.

Vancouver:

Carvalho SAd. Calculo dos Campos eletromagneticos gerados pela interação de um corpo tridimensional com uma onda eletromagnetica usando o metodo dos momentos e funções de base solenoidais. [Internet] [Thesis]. Universidade Estadual de Campinas; 1998. [cited 2021 Jan 17]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/260946.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Carvalho SAd. Calculo dos Campos eletromagneticos gerados pela interação de um corpo tridimensional com uma onda eletromagnetica usando o metodo dos momentos e funções de base solenoidais. [Thesis]. Universidade Estadual de Campinas; 1998. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/260946

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.