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116 results on '"Tonero A"'

101. Limits on anomalous top-quark gauge couplings from Tevatron and LHC data

Author

Fabbrichesi, M. (M.), Pinamonti, M. (M.), Tonero, A. (Alberto), Fabbrichesi, M. (M.), Pinamonti, M. (M.), and Tonero, A. (Alberto)

Abstract

We review and update current limits on possible anomalous couplings of the top quark to gauge bosons. We consider data from top quark decay (as encoded in the (Formula presented.)-boson helicity fractions) and single-top production (in the t-, s- and Wt-channels). We find improved limits with respect to previous results (in most cases of almost one order of magnitude) and extend the analysis to include four-quark operators. We find that new electroweak physics is constrained to live above an energy scale between 430 GeV and 3.2 TeV (depending on the form of its contribution). For comparison, strongly interacting new physics is bounded by scales higher than 1.3 or 1.5 TeV (again depending on its contribution).

Published
2014
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110. New physics in double Higgs production at future e+e− colliders.

Author

Vasquez, Andres, Degrande, Céline, Tonero, Alberto, and Rosenfeld, Rogerio

Subjects
PHYSICS, HIGGS bosons, LUMINOSITY
Abstract

We study the effects of new physics in double Higgs production at future e+e− colliders. In the Standard Model the chiral limit (me = 0) plays an important role for this process, being responsible for the smallness of the tree-level diagrams with respect to the 1-loop contributions. In our work, we consider the possibility of an enhancement due to the contribution of Standard Model dimension-six effective operators. We show that there are only two relevant operators for this process that are not yet (strongly) constrained by other data. We perform a sensitivity study on the operator coefficients for several benchmark values of energy and integrated luminosity related to the proposed linear colliders such as CLIC, ILC and FCC-ee and we derive expected 95% CL limits for each benchmark scenario. [ABSTRACT FROM AUTHOR]

Published
2019
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112. Proceedings, Workshop on Monte Carlo's, Physics and Simulations at the LHC. Part II

Author

Ambroglini, F., Armillis, R., Azzi, P., Bagliesi, G., Ballestrero, A., Balossini, G., Banfi, A., Bartalini, P., Benedetti, D., Bevilacqua, G., Bolognesi, S., Cafarella, A., Calame, C. M. Carloni, Carminati, L., Cobal-Grassmann, Marina, Corcella, G., Coriano, C., Dainese, A., Del Duca, V., Fabbri, F., Fabbrichesi, M., Fano, L., Faraggi, Alon E., Frixione, S., Garbini, L., Giammanco, A., Massimiliano Grazzini, Guzzi, M., Irges, N., Maina, E., Mariotti, C., Masetti, G., Mele, B., Migliore, E., Montagna, G., Monteno, M., Moretti, M., Nason, P., Nicrosini, O., Nisati, A., Perrotta, A., Piccinini, F., Polesello, G., Rebuzzi, D., Rizzi, A., Rolli, S., Roda, C., Rosati, S., Santocchia, A., Stocco, D., Tartarelli, F., Tenchini, R., Tonero, A., Treccani, M., Treleani, D., Tricoli, A., Trocino, D., Vecchi, L., Vicini, A., and Vivarelli, I.

113. Interpreting top-quark LHC measurements in the standard-model effective field theory

Author

Aguilar-Saavedra, Juan Antonio, Degrande, C., Durieux, G., Maltoni, F., Vryonidou, E., Zhang, C., Barducci, D., Brivio, I., Cirigliano, V., Dekens, W., Vries, J., Englert, C., Fabbrichesi, M., Grojean, C., Haisch, U., Jiang, Y., Kamenik, J., Mangano, M., Marzocca, D., emanuele mereghetti, Mimasu, K., Moore, L., Perez, G., Plehn, T., Riva, F., Russell, M., Santiago, J., Schulze, M., Soreq, Y., Tonero, A., Trott, M., Westhoff, S., White, C., Wulzer, A., and Zupan, J.

Subjects
hep-ex, Physics::Instrumentation and Detectors, High Energy Physics::Lattice, High Energy Physics::Phenomenology, FOS: Physical sciences, hep-ph, High Energy Physics - Experiment, High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), Nonlinear Sciences::Exactly Solvable and Integrable Systems, High Energy Physics - Phenomenology (hep-ph), Physics::Atomic and Molecular Clusters, Particle Physics - Experiment, Particle Physics - Phenomenology
Abstract

This note proposes common standards and prescriptions for the effective-field-theory interpretation of top-quark measurements at the LHC., Comment: LHC TOP WG note, 10 pages of main text, 5 appendices, 1 figure, 21 tables

114. Proceedings, Workshop on Monte Carlo's, Physics and Simulations at the LHC. Part I

Author

Ambroglini, F., Armillis, R., Azzi, P., Bagliesi, G., Ballestrero, A., Balossini, G., Banfi, A., Bartalini, P., Benedetti, D., Bevilacqua, G., Bolognesi, S., Cafarella, A., Calame, C. M. Carloni, Carminati, L., Cobal-Grassmann, Marina, Corcella, G., Coriano, C., Dainese, A., Del Duca, V., Fabbri, F., Fabbrichesi, M., Fano, L., Faraggi, Alon E., Frixione, S., Garbini, L., Giammanco, A., Guzzi, M., Irges, N., Maina, E., Mariotti, C., Masetti, G., Mele, B., Migliore, E., Montagna, G., Monteno, M., Moretti, M., Nason, P., Nicrosini, O., Nisati, A., Perrotta, A., Piccinini, F., Polesello, G., Rebuzzi, D., Andrea Rizzi, Rolli, S., Roda, C., Rosati, S., Santocchia, A., Stocco, D., Tartarelli, F., Tenchini, R., Tonero, A., Treccani, M., Treleani, D., Tricoli, A., Trocino, D., Vecchi, L., Vicini, A., and Vivarelli, I.

116. Aprimoramento na produção em dobro de bóson de Higgs por aniquilação de e+ e− e física além do modelo padrão

Author

Vásquez Tocora, Andrés Felipe, Universidade Estadual Paulista (Unesp), Rosenfeld, Rogério [UNESP], and Tonero, Alberto

Subjects
Beyond the standard model, Effective field theory, Higgs boson production, Sommerfeld effect
Abstract

Submitted by ANDRES FELIPE VASQUEZ TOCORA (anfvasquezto@unal.edu.co) on 2018-10-02T21:56:33Z No. of bitstreams: 1 thesis.pdf: 3832471 bytes, checksum: 13b65d2c4a9d5e2b2c7414dd2cdfba50 (MD5) Rejected by Hellen Sayuri Sato null (hellen@ift.unesp.br), reason: Solicitamos que realize correções na submissão seguindo as orientações abaixo - Favor inserir a ficha catalográfica no pdf , logo após a página de rosto - No PDF está faltando as palavras-chave logo após o resumo e abstract on 2018-10-03T14:34:04Z (GMT) Submitted by ANDRES FELIPE VASQUEZ TOCORA (anfvasquezto@unal.edu.co) on 2018-10-03T16:52:45Z No. of bitstreams: 1 Thesis.pdf: 4205198 bytes, checksum: 499748f6d69605fda811e56805ac4e12 (MD5) Approved for entry into archive by Hellen Sayuri Sato null (hellen@ift.unesp.br) on 2018-10-03T17:32:51Z (GMT) No. of bitstreams: 1 vasqueztocora_af_me_ift.pdf: 4205198 bytes, checksum: 499748f6d69605fda811e56805ac4e12 (MD5) Made available in DSpace on 2018-10-03T17:32:51Z (GMT). No. of bitstreams: 1 vasqueztocora_af_me_ift.pdf: 4205198 bytes, checksum: 499748f6d69605fda811e56805ac4e12 (MD5) Previous issue date: 2018-03-29 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) The main goal of this dissertation is to show the enhancement of the cross-section for the double Higgs production through pair annihilation by including effective interactions and through the non-perturbative Sommerfeld effect. Bounds to some Wilson coefficients were obtained from such enhancement, this in the scenarios of the future e+ e− -colliders (FCC-ee, ILC, CLIC). In order to achieve this, some computational tools were implemented: FeynRules, FeynArts, FormCalc, and LoopTools. It is also shown the enhancement of the double Higgs production in 2HDM and MSSM, discussing the general framework of these two models. In addition, it is studied the threshold behavior of the cross-section for the double Higgs production when a hidden sector couples to the Higgs boson, yielding resonances below the threshold energy due to non-perturbative effects. We study the Sommerfeld effect in the double Higgs production in the scenario of e+ e− -colliders. The enhancement is discussed as generated from a hidden sector coupled to the Higgs boson. Below and above threshold enhancements are presented. Such analysis is of importance in the ILC project, which will operate up to the threshold energy √s = 250 GeV. The results has been achieved by the use of computational tools like FeynArts, FormCalc, and LoopTools. O objetivo principal dessa dissertação é, mostrar o aprimoramento da seção de choque para a produção em dobro dos bósons de Higgs, por meio de aniquilação de pares, incluindo interações efetivas e através do efeito não perturbativo de Sommerfeld. De tais aprimoramentos, os limites para alguns coeficientes de Wilson foram obtidos, isso nos cenários de futuros aceleradores de e+e- (FCC-ee, ILC, CLIC). Para atingir estes resultados, algumas ferramentas computacionais foram implementadas: FeynRules, FeynArts, FormCalc e LoopTools. Também, é mostrado o aprimoramento da produção em dobro de bósons de Higgs no “2HDM” e “MSSM”, discutindo o marco geral desses dois modelos. Além disso, foi estudado o comportamento, perto do limite de produção, da seção de choque da produção em dobro dos bósons de Higgs, quando um setor escondido é acoplado ao Higgs, produzindo ressonâncias abaixo da energia limite de produção, devido à efeitos não perturbativos.

Published
2018

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