13,756 research outputs found
An Updated Analysis On The Rise Of The Hadronic Total Cross-section At The Lhc Energy Region
No full textA forward amplitude analysis on pp and elastic scattering above 5 GeV is presented. The dataset includes the recent high-precision TOTEM measurements of the pp total and elastic (integrated) cross-sections at 7 TeV and 8 TeV. Following previous works, the leading high-energy contribution for the total cross-section (σtot) is parametrized as lnγ(s/sh), where γ and s h are free real fit parameters. Singly-subtracted derivative dispersion relations are used to connect σtot and the rho parameter (ρ) in an analytical way. Different fit procedures are considered, including individual fits to σtot data, global fits to σtot and ρ data, constrained and unconstrained data reductions. The results favor a rise of the σtot faster than the log-squared bound by Froissart and Martin at the LHC energy region. The parametrization for σtot is extended to fit the elastic cross-section (σel) data with satisfactory results. The analysis indicates an asymptotic ratio σel/σ tot consistent with 1/3 (as already obtained in a previous work). A critical discussion on the correlation, practical role and physical implications of the parameters γ and sh is presented. The discussion confronts the 2002 prediction of σtot by the COMPETE Collaboration and the recent result by the Particle Data Group (2012 edition of the Review of Particle Physics). Some conjectures on possible implications of a fast rise of the proton-proton total cross-section at the highest energies are also presented. © 2013 World Scientific Publishing Company.2820Froissart, M., (1961) Phys. Rev., 123, p. 1053Martin, A., (1966) Nuovo Cimento A, 42, p. 930Martin, A., (1966) Nuovo Cimento A, 44, p. 1219Lukaszuk, L., Martin, A., (1967) Nuovo Cimento A, 52, p. 122Azimov, Ya.I., (2011) Phys. Rev. D, 84, p. 056012Azimov, Ya.I., Froissart Bounds for Amplitudes and Cross-sections at High Energies, , arXiv:1204.0984 [hep-ph]Azimov, Ya., What Is the Real Meaning of the Froissart Theorem?, , arXiv:1208.4304 [hep-ph]Cudell, J.R., (2002) Phys. Rev. D, 65, p. 074024. , COMPETE CollabCudell, J.R., (2002) Phys. Rev. Lett., 89, p. 201801. , COMPETE CollabIgi, K., Ishida, M., (2002) Phys. Rev. D, 66, p. 034023Igi, K., Ishida, M., (2005) Phys. Lett. B, 622, p. 286Block, M.M., Halzen, F., (2004) Phys. Rev. D, 70, p. 091901Block, M.M., Halzen, F., (2005) Phys. Rev. D, 72, p. 036006Nakamura, K., (2010) J. Phys. G: Nucl. Part. Phys., 37, p. 075021. , Particle Data GroupAntchev, G., (2011) Europhys. Lett., 95, p. 41001. , TOTEM CollabAntchev, G., (2011) Europhys. Lett., 96, p. 21002. , TOTEM CollabAntchev, G., (2012) Europhys. Lett., 98, p. 31002. , TOTEM CollabBeringer, J., (2012) Phys. Rev. D, 86, p. 010001. , http://pdg.lbl.gov, Particle Data GroupFagundes, D.A., Menon, M.J., Silva, P.V.R.G., (2012) Braz. J. Phys., 42, p. 452. , arXiv:1112.4704 [hep-ph]Fagundes, D.A., Menon, M.J., Silva, P.V.R.G., (2013) J. Phys. G: Nucl. Part. Phys., 40, p. 065005. , arXiv:1208.3456 [hep-ph]Amaldi, U., (1977) Phys. Lett. B, 66, p. 390Antchev, G., (2013) Europhys. Lett., 101, p. 21002. , TOTEM CollabAntchev, G., (2013) Europhys. Lett., 101, p. 21004. , TOTEM CollabAntchev, G., (2013) Phys. Rev. Lett., 111, p. 012001. , TOTEM CollabAugier, C., (1993) Phys. Lett. B, 315, p. 503. , UA4/2 CollabKang, K., Nicolescu, B., (1975) Phys. Rev. D, 11, p. 2461Avila, R.F., Menon, M.J., (2004) Nucl. Phys. A, 744, p. 249Bevington, P.R., Robinson, D.K., (1992) Data Reduction and Error Analysis for the Physical Sciences, , 2nd edn. McGraw-Hill, Boston, MassachusettsFagundes, D.A., Menon, M.J., Silva, P.V.R.G., Reply to "Commentary on Total Hadronic Cross-section Data and the Froissart-Martin Bound by Fagundes, Menon and Silva, , arXiv:1211.3352 [hep-ph]Avila, R.F., Luna, E.G.S., Menon, M.J., (2001) Braz. J. Phys., 31, p. 567Avila, R.F., Luna, E.G.S., Menon, M.J., (2003) Phys. Rev. D, 67, p. 054020ROOT Framework, , http://root.cern.ch/drupal/, http://root.cern.ch/root/html/TMinuit.htmlJames, F., (1998) MINUIT Function Minimization and Error Analysis, Reference Manual, Version 94.1, , CERN Program Library Long Writeup D506 (CERN, Geneva, Switzerland)Common, A.K., (1970) Nuovo Cimento, 69, p. 115Abreu, P., (2012) Phys. Rev. Lett., 109, p. 062002. , The Pierre Auger CollabBarone, V., Predazzi, E., (2002) High-Energy Particle Diffraction, , Spring-Verlag, BerlinDonnachie, S., Dosch, G., Landshoff, P.V., Natchmann, O., (2002) Pomeron Physics and QCD, , Cambridge University Press, CambridgeDonnachie, A., Landshoff, P.V., (1979) Z. Phys. C, 2, p. 55Donnachie, A., Landshoff, P.V., (1984) Nucl. Phys. B, 244, p. 322Block, M.M., Halzen, F., (2012) Phys. Rev. D, 86, p. 051504Pumplin, J., (1973) Phys. Rev. D, 8, p. 2899Sukhatme, U.P., Henyey, F.S., (1976) Nucl. Phys. B, 108, p. 317Grau, A., Pacetti, S., Pancheri, G., Srivastava, Y.S., (2012) Phys. Lett. B, 714, p. 70Donnachie, A., Landshoff, P.V., (1992) Phys. Lett. B, 296, p. 227Landshoff, P.V., (2009) Acta Phys. Pol. B, 40, p. 1967Landshoff, P.V., (2009) AIP Conf. Proc., 1105, p. 236. , arXiv:0811.0260 [hep-ph]Donnachie, A., Landshoff, P.V., Elastic Scattering at the LHC, , arXiv:1112.2485 [hep-ph]Kopeliovich, B.Z., Potashnikova, I.K., Povh, B., Predazzi, E., (2000) Phys. Rev. Lett., 85, p. 507Kopeliovich, B.Z., Potashnikova, I.K., Povh, B., (2012) Phys. Rev. D, 86, pp. 051502RPetrov, V.A., Prokudin, A.V., (2002) Eur. Phys. J. C, 23, p. 135Petrov, V.A., Predazzi, E., Prokudin, A., (2003) Eur. Phys. J. C, 28, p. 525Petrov, V.A., Prokudin, A., Three Pomerons Vs DO and TOTEM Data, , arXiv:1212.1924 [hep-ph]Shaham, N., Piran, T., (2013) Phys. Rev. Lett., 110, p. 021101. , arXiv:1204.1488 [astroph. HE]Conceição, R., Deus De J.Dias, Pimenta, M., (2012) Nucl. Phys. A, 888, p. 58. , arXiv:1107.0912 [hep-ph]Menon, M.J., Silva, P.V.R.G., A Study on Analytic Parametrizations for the Proton-proton Cross-sections and Asymptotia, , arXiv:1305.2947 [hep-ph
Lincoln Silva, iconoclasta
No full textLincoln Silva, iconoclastLincoln Silva is one of the Paraguayan writers outshone by Augusto Roa Bastos and Gabriel Casaccia. Being an author of two novels, Rebelión después and General, general, he displays his belonging to Rafael Barrett’s “journalism of accusation,” originated at the beginning of the 20th century. In general, Silva can be considered an anarchist who does not agree with Alfredo Stroessner’s dictatorial system and criticizes the institution of the Church and its language. The proletarian revolution and politics itself become another subject of his criticism. Silva opposes the dictator but does not consider satisfactory the possible governance of the opposition. He ridicules the topics of the Paraguayan culture without offering concrete solutions. He refuses the concepts but does not intend to be constructive. Just as Cassacia’s protagonists, all the characters created by Silva are pulled into ethically ambiguous situations and they can be possibly interpreted as “esperpentic.”Lincoln Silva, iconoclastLincoln Silva is one of the Paraguayan writers outshone by Augusto Roa Bastos and Gabriel Casaccia. Being an author of two novels, Rebelión después and General, general, he displays his belonging to Rafael Barrett’s “journalism of accusation,” originated at the beginning of the 20th century. In general, Silva can be considered an anarchist who does not agree with Alfredo Stroessner’s dictatorial system and criticizes the institution of the Church and its language. The proletarian revolution and politics itself become another subject of his criticism. Silva opposes the dictator but does not consider satisfactory the possible governance of the opposition. He ridicules the topics of the Paraguayan culture without offering concrete solutions. He refuses the concepts but does not intend to be constructive. Just as Cassacia’s protagonists, all the characters created by Silva are pulled into ethically ambiguous situations and they can be possibly interpreted as “esperpentic.&rdquo
Ashley Judd and Candelaria Silva discuss, Bittersweet Humanitarianism at Ford Hall Forum, video recording, 4/8/2011
No full textAshley Judd, award-winning actress, humanitarian, and author of All That Is Bitter and Sweet joins moderator Candelaria Silva, author and Roxbury Film Festival founder, to discuss Judd\u27s experiences in feminist social justice work to discover the relationship between healing oneself and healing others.https://dc.suffolk.edu/fhf-av/1107/thumbnail.jp
¿Una nueva cuestión social?
No full textThe present article, as the author suggests, is a reviewed version of the conference held at Universidad Católica Cardenal Silva Henríquez, on the occasion of the celebration of the Social Worker's day, in November 2005. This celebration- organized by the Department of Social Work and whose invitation is deeply appreciated by the author- was presided over by a new performance on stage of Cantata Santa María de Iquique, by the recently deceased Chilean composer Luis Advis V., and which is, according to Aquín, "an extraordinary expression of the social concern", not only for Chile, but for the area of Latin America as well.El presente artículo, nos indica su autora, es una versión revisada de la conferencia desarrollada en la Universidad Católica Carden Raúl Silva Henríquez, con motivo de la celebración del dia del Trabajador Social, en noviembre de 2005. Dicha celebración -organizada por el Departamento de Trabajo Social y cuya invitación, la autora "agradece profundamente" - estuvo presidida por una nueva puesta en escena de la Cantata Santa María de Iquique, del compositor chileno recientemente fallecido, Luis Advis V., que resulta, según Aquín, "una extraordinaria expresión de la cuestión social", no sólo para Chile sino para el conjunto de América Latina
La situación de los derechos humanos en Chile, hoy. Desafíos para la construcción de una sociedad democrática
No full textThe essay-like reflection included here was presented at the inter-school seminar of Social Work, Sociology and Law courses of Catholic University Silva Henríquez (UCSH), held on March 28th, 2018 in Santiago, and which was entitled "After 70 Years of the Universal Declaration of Human Rights: Challenges of citizenship and the State in today's Latin America." In the text, some areas, themes and human groups are chosen for they, according to the author, make visible the main gaps and advances in human rights, constituting an opportunity to reflect and renew the commitment with human rights from different disciplines and from the role of citizens, in order to strengthen democracy, justice and freedom.La reflexión de corte ensayístico que aquí se presenta, se expuso en el seminario interescuelas de las carreras de Trabajo Social, Sociología y Derecho de la Universidad Católica Silva Henríquez (UCSH). Este encuentro, titulado "A 70 Años de la Declaración Universal de los Derechos Humanos: Retos de la ciudadanía y el Estado en la América Latina actual", se realizó en la sede central de la Universidad Silva Henríquez el 28 de marzo de 2018 en Santiago, Chile. En el texto se escogen algunos ámbitos, temas y grupos humanos que, a juicio de la autora, visibilizan las principales brechas y avances en materia de derechos humanos, lo que constituye una oportunidad de reflexionar y renovar el compromiso con los derechos humanos desde las distintas disciplinas y desde el papel de ciudadanos/as, en aras a fortalecer la democracia, la justicia y la libertad
Oriental: a importância do timbre na obra de Pattápio Silva
No full textThe flutist and composer Pattápio Silva (1880-1907) was one of the Brazilian interpreters that reached larger prominence and projection in the society of his time. In spite of the short career, interrupted by the premature death, when he was 26 years old, Pattápio was considered a great virtuoso of his instrument besides having participated in the historical recordings accomplished in 1902, pioneers in brazil. Influenced by the European flutists' composers, we can highlight in the work of Pattápio Silva his innovative spirit with relation to the exploration of the technique of his instrument, with emphasis in the sound possibilities of the flute. Under these aspects, his work of larger prominence was Oriental op.6 to flute and piano. Through the spectrographic analyses accomplished in the work, we can observe the importance of the variations of tone-color proposed by the author in this piece.O flautista e compositor Pattápio silva (1880-1907) foi um dos intérpretes brasileiros que alcançou maior destaque e projeção na sociedade de sua época. Apesar da curta carreira, interrompida pela morte prematura aos 26 anos, Pattápio firmou-se como grande virtuose de seu instrumento além de ter participado das históricas gravações realizadas em 1902, pioneiras no Brasil. Influenciado pelos compositores flautistas europeus, podemos destacar na obra de Pattápio Silva seu espírito inovador quanto à exploração da técnica de seu instrumento, com ênfase nas possibilidades sonoras da flauta. Sob estes aspectos, sua obra de maior destaque foi Oriental op. 6 para flauta e piano. Através das análises espectográficas realizadas neste trabalho, poderemos observar a importância das variações de timbre propostas pelo autor nesta peça
AUTHOR CONTRIBUTION
No full textConception or design of the study: Silva AC, Silva LG, Souza ARS, Martins, AKL, Gomes EB. Data collection: Silva AC, Silva LG, Souza ARS. Analysis and interpretation of the data: Silva AC, Silva LG, Souza ARS. Writing of the article or critical review: Silva AC, Gomes EB. Final approval of the version to be published: Silva AC, Martins, AKL, Oliveira CJ, Alencar AMPG, Gomes EB
AUTHOR CONTRIBUTION
No full textConception or design of the study: Silva AC, Silva LG, Souza ARS, Martins, AKL, Gomes EB. Data collection: Silva AC, Silva LG, Souza ARS. Analysis and interpretation of the data: Silva AC, Silva LG, Souza ARS. Writing of the article or critical review: Silva AC, Gomes EB. Final approval of the version to be published: Silva AC, Martins, AKL, Oliveira CJ, Alencar AMPG, Gomes EB
AUTHOR CONTRIBUTION
No full textConception or design of the study: Silva AC, Silva LG, Souza ARS, Martins, AKL, Gomes EB. Data collection: Silva AC, Silva LG, Souza ARS. Analysis and interpretation of the data: Silva AC, Silva LG, Souza ARS. Writing of the article or critical review: Silva AC, Gomes EB. Final approval of the version to be published: Silva AC, Martins, AKL, Oliveira CJ, Alencar AMPG, Gomes EB
Identification of author profiles through social networks
No full textThe aim of this paper is to compile dictionaries of slang words, abbreviations, contractions, and emoticons to help the pre-processing of texts published in social networks. The use of these dictionaries is intended to improve the results of the tasks related to data obtained from these platforms. Therefore, a hypothesis was evaluated in the task of identifying author profiles (author profiling).Silva, JesúsMaria Santodomingo, Nicolas EliasRomero, LigiaJorge, MarisolHerrera, MaritzaPineda Lezama, Omar Bonerg
- …
