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

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Universidade do Estado do Rio de Janeiro

1. Antônio Vilela Pereira. Estudos de produção difrativa de top-anti-top no CMS/LHC.

Degree: Master, 2006, Universidade do Estado do Rio de Janeiro

Apresenta-se neste trabalho um estudo de produção difrativa de pares tt, na topologia de dupla troca de pómeron (DPE) inclusiva, nas condições do CMS para alta luminosidade (2 x 1033 cm-2s-1). O canal de decaimento para o sistema tt é o Semi-Leptônico, comum quark × top decaindo em um jato de b, um múon e um neutrino e o outro em jatos, sendo um deles de b (tt → bbqqμνμ). O processo acima foi simulado com o gerador DPEMC v2.4 [12], juntamente com o código de simulação FAMOS [41], versão 1.4.0, do CMS. Dois modelos teóricos foram utilizados, aqueles de Cox & Forshaw [10], [11] e de Boonekamp, Peschanskie Royon [13], [14]. Como background dominante, temos a combinação de um evento de tt não difrativo com eventos de pile-up (em média7) na mesma colisão de feixe no LHC. Como utilizam-se Roman Pots) para selecionar os eventos difrativos, eventos não ocorre relacionados de pile-up gerando prótons próximos à linha do feixe juntamente com um evento de tt não difrativo, são indistinguíveis experimentalmente do caso difrativo. Para uma luminosidade integrada de 10 fb-1, obtém-se da ordem de centenas de eventos para este background, enquanto que de O(1)a O (100) eventos do sinal difrativo, dependendo do modelo teórico utilizado.

Inclusive DPE (double pomeron exchange) production of t pairs was studied for CMS high luminosity running (2 x 1033cm-2s-1 ), with one top decaying into a b-jet, a muon and a neutrino, and the other to jets, one of them a b-jet (bbqqμνμ). The process was simulated with the generator DPEMC v2.4 [12], together with the fast CMS simulation code FAMOS [41], version 1.4.0. Two theoretical models were used for this analysis, that of Cox & Forshaw [10], [11] and of Boonekamp, Peschanski and Royon [13], [14]. As dominant background, we have the overlap of a non-diffractive tt event with pile-up events (7 in average) in the same bunch crossing. Since we use Roman Pots to tag the diffractive event, uncorrelated diffractive pile-up events generating very forward diffractive protons can fake the non-diffractive event as a diffractive one. For an integrated luminosity of 10 fb-1 we obtain a number of events of O (100) for this background, while (1) to O (100) for the diffractive signal, depending on the theoretical model used.

Advisors/Committee Members: Moacyr Henrique Gomes e Souza, Vitor Oguri, Francisco Caruso Neto, Gilvan Augusto Alves, Alberto Franco de Sá Santoro.

Subjects/Keywords: CMS/LHC; Produção difrativa; FISICA NUCLEAR; CMS/LHC; Diffractive production

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APA (6th Edition):

Pereira, A. V. (2006). Estudos de produção difrativa de top-anti-top no CMS/LHC. (Masters Thesis). Universidade do Estado do Rio de Janeiro. Retrieved from http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=549 ;

Chicago Manual of Style (16th Edition):

Pereira, Antônio Vilela. “Estudos de produção difrativa de top-anti-top no CMS/LHC.” 2006. Masters Thesis, Universidade do Estado do Rio de Janeiro. Accessed October 23, 2019. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=549 ;.

MLA Handbook (7th Edition):

Pereira, Antônio Vilela. “Estudos de produção difrativa de top-anti-top no CMS/LHC.” 2006. Web. 23 Oct 2019.

Vancouver:

Pereira AV. Estudos de produção difrativa de top-anti-top no CMS/LHC. [Internet] [Masters thesis]. Universidade do Estado do Rio de Janeiro; 2006. [cited 2019 Oct 23]. Available from: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=549 ;.

Council of Science Editors:

Pereira AV. Estudos de produção difrativa de top-anti-top no CMS/LHC. [Masters Thesis]. Universidade do Estado do Rio de Janeiro; 2006. Available from: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=549 ;


Iowa State University

2. Wu, Dajing. Particle production at small-x in deep inelastic scattering.

Degree: 2014, Iowa State University

The properties of small-x QCD are studied in this dissertation. One of the most interesting features of small-x physics is gluon saturation effect and to obtain direct evidence of this effect has been of great theoretical and experimental interest. We focus on deep inelastic scattering off heavy nucleus which may provide the first evidence of gluon saturation. Our results might be put into test in future by Electron-Ion Collider(EIC). We studied transverse momentum spectrum in gluon production and analyzed the result in different regimes of nuclear matter, dilute nucleus and saturated nucleus included. We first studied diffractive gluon production in small-x DIS, which itself is an excellent probe to detect gluon distribution inside nucleus. We then made an investigation on inclusive gluon production in DIS and, specifically, tried to understand the contribution from momentum conservation.

Subjects/Keywords: deep inelastic scattering; diffractive gluon production; electron-ion collider; inclusive gluon production; QCD; small-x; Physics

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

APA (6th Edition):

Wu, D. (2014). Particle production at small-x in deep inelastic scattering. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/13846

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):

Wu, Dajing. “Particle production at small-x in deep inelastic scattering.” 2014. Thesis, Iowa State University. Accessed October 23, 2019. https://lib.dr.iastate.edu/etd/13846.

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

MLA Handbook (7th Edition):

Wu, Dajing. “Particle production at small-x in deep inelastic scattering.” 2014. Web. 23 Oct 2019.

Vancouver:

Wu D. Particle production at small-x in deep inelastic scattering. [Internet] [Thesis]. Iowa State University; 2014. [cited 2019 Oct 23]. Available from: https://lib.dr.iastate.edu/etd/13846.

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

Council of Science Editors:

Wu D. Particle production at small-x in deep inelastic scattering. [Thesis]. Iowa State University; 2014. Available from: https://lib.dr.iastate.edu/etd/13846

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


Universidade do Estado do Rio de Janeiro

3. Ana Carolina dos Santos Assis Jesus. Produção difrativa de J/ψ no experimento DØ.

Degree: PhD, 2007, Universidade do Estado do Rio de Janeiro

Este trabalho apresenta medidas de duas razões de produção difrativa envolvendo sabores pesados, através de um estudo em uma amostra reconstruída de J/ψ → μ+ μ- em colisões pp a raiz quadrada de s= 1,96 TeV com o uso do detector DØ situado no Fermilab. Estes eventos foram selecionados com o uso dos detectores do Monitor de Luminosidade, o sistema de calorimetria e o sistema de m Ão ons do DØ, em uma região de pseudo-rapidez 2,7 ≤|η|≤ 4 ,4 . As razões medidas foram NJϕdiff/Nj/ϕtotal = (1,74 0,16 (estat) 0,13 (sist)) % e N b dif / N b total = 0,79 0,11(estat) 0,23 (sist))

This work presents measurements of two diffractive production ratio for heavy flavour physics on sat with the use of are constructed J/ψ → μ + μ sample in pp collisions at s= 1. 96 TeV using the DØ detector at Fermilab Tevatron. These events were selected using the Luminosity Monitor detectors, the calorimeter system and the muon system in a pseudo-rapidity region with range 2 . 7 ≤|η|≤ 4, 4 . The measured ratio were estimated to be NJϕdiff/Nj/ϕtotal = (1,74 0,16 (estat) 0,13 (sist)) % and Nb dif / Nb total = 0,79 0,11(estat) 0,23 (sist))%

Advisors/Committee Members: André Sznajder, Gilvan Augusto Alves, Luiz Martins Mundin Filho, José de Sá Borges Filho, Mirian Mendes Gandelman.

Subjects/Keywords: production; muon; J/ψ; Diffractive; FISICA DAS PARTICULAS ELEMENTARES E CAMPOS; múon; J/ψ; Difrativa; produção

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

APA (6th Edition):

Jesus, A. C. d. S. A. (2007). Produção difrativa de J/ψ no experimento DØ. (Doctoral Dissertation). Universidade do Estado do Rio de Janeiro. Retrieved from http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=799 ;

Chicago Manual of Style (16th Edition):

Jesus, Ana Carolina dos Santos Assis. “Produção difrativa de J/ψ no experimento DØ.” 2007. Doctoral Dissertation, Universidade do Estado do Rio de Janeiro. Accessed October 23, 2019. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=799 ;.

MLA Handbook (7th Edition):

Jesus, Ana Carolina dos Santos Assis. “Produção difrativa de J/ψ no experimento DØ.” 2007. Web. 23 Oct 2019.

Vancouver:

Jesus ACdSA. Produção difrativa de J/ψ no experimento DØ. [Internet] [Doctoral dissertation]. Universidade do Estado do Rio de Janeiro; 2007. [cited 2019 Oct 23]. Available from: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=799 ;.

Council of Science Editors:

Jesus ACdSA. Produção difrativa de J/ψ no experimento DØ. [Doctoral Dissertation]. Universidade do Estado do Rio de Janeiro; 2007. Available from: http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=799 ;

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