Search

Your search keyword '"Trifa, S."' showing total 6 results
Start Over Author "Trifa, S."
6 results on '"Trifa, S."'

1. Global Analysis of Dark Matter Simplified Models with Leptophobic Spin-One Mediators using MasterCode

Author

Bagnaschi, E., Costa, J. C., Sakurai, K., Borsato, M., Buchmueller, O., De Roeck, A., Dolan, M. J., Ellis, J. R., Flächer, H., Hahn, K., Heinemeyer, S., Lucio, M., Santos, D. Martínez, Olive, K. A., Trifa, S., and Weiglein, G.

Subjects
High Energy Physics - Phenomenology, Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment
Abstract

We report the results of a global analysis of dark matter simplified models (DMSMs) with leptophobic mediator particles of spin one, considering the cases of both vector and axial-vector interactions with dark matter (DM) particles and quarks. We require the DMSMs to provide all the cosmological DM density indicated by Planck and other observations, and we impose the upper limits on spin-independent and -dependent scattering from direct DM search experiments. We also impose all relevant LHC constraints from searches for monojet events and measurements of the dijet mass spectrum. We model the likelihood functions for all the constraints and combine them within the MasterCode framework, and probe the full DMSM parameter spaces by scanning over the mediator and DM masses and couplings, not fixing any of the model parameters. We find, in general, two allowed regions of the parameter spaces: one in which the mediator couplings to Standard Model (SM) and DM particles may be comparable to those in the SM and the cosmological DM density is reached via resonant annihilation, and one in which the mediator couplings to quarks are $\lesssim 10^{-3}$ and DM annihilation is non-resonant. We find that the DM and mediator masses may well lie within the ranges accessible to LHC experiments. We also present predictions for spin-independent and -dependent DM scattering, and present specific results for ranges of the DM couplings that may be favoured in ultraviolet completions of the DMSMs., Comment: 24 pages, 16 figures

Published
2019
Full Text
View/download PDF

2. An Intelligent Intrusion Detection System for Internet of Things Attack Detection and Identification Using Machine Learning

Author

Trifa S. Othman and Saman M. Abdullah

Subjects
Internet of things networks, Intrusion detection system, Machine learning, Intelligent attack classification, Identification, Technology, Science
Abstract

The usability and scalability of Internet of things (IoT) technology are expanding in such a way that they facilitate human living standards. However, they increase the vulnerabilities and attack vectors over IoT networks as well. Thus, more security challenges could be expected and encountered, and more security services and solutions should be provided. Although many security techniques propose and promise good solutions for that intrusion detection systems IDSs still considered the best. Many works proposed machine learning (ML)-based IDSs for IoT attack detection and classification. Nevertheless, they suffer from two main gaps. First, few of the works utilized or could analyze an up-to-date version of IoT-based attack behaviors. Second, few of the works can be considered as multi-class attack detection and classification. Therefore, this work proposes an intelligent IDS (IIDS) by exploiting the ability of ML algorithms to classify and identify malicious from benign behaviors among IoT network packets. Three ML classifier algorithms are investigated, which are K-Nearest Neighbor, support vector machine, and artificial neural network. The developed models have been trained and tested as binary and multi-class classifiers against 15 types of attacks and benign. This work employs an up-to-date dataset known as IoT23, which covers millions of malicious and benign behaviors of IoT-connected devices. The process of developing the proposed IIDSs goes under different preprocessing phases and methods, such as null value solving, SMOTE method for the imbalanced datasets, data normalization, and feature selections. The results present IIDSs as good binary and multi-class classifiers even for zero-day attacks.

Published
2023
Full Text
View/download PDF

4. Global analysis of dark matter simplified models with leptophobic spin-one mediators using MasterCode

Author

Bagnaschi, E, Costa, J, Sakurai, K, Borsato, M, Buchmueller, O, De Roeck, A, Dolan, M, Ellis, J, Flacher, H, Hahn, K, Heinemeyer, S, Lucio, M, Santos, D, Olive, K, Trifa, S, Weiglein, G, Bagnaschi E, Costa JC, Sakurai K, Borsato M, Buchmueller O, De Roeck A, Dolan MJ, Ellis JR, Flacher H, Hahn K, Heinemeyer S, Lucio M, Santos DM, Olive KA, Trifa S, Weiglein G, Bagnaschi, E, Costa, J, Sakurai, K, Borsato, M, Buchmueller, O, De Roeck, A, Dolan, M, Ellis, J, Flacher, H, Hahn, K, Heinemeyer, S, Lucio, M, Santos, D, Olive, K, Trifa, S, Weiglein, G, Bagnaschi E, Costa JC, Sakurai K, Borsato M, Buchmueller O, De Roeck A, Dolan MJ, Ellis JR, Flacher H, Hahn K, Heinemeyer S, Lucio M, Santos DM, Olive KA, Trifa S, and Weiglein G

Abstract

We report the results of a global analysis of dark matter simplified models (DMSMs) with leptophobic mediator particles of spin one, considering the cases of both vector and axial-vector interactions with dark matter (DM) particles and quarks. We require the DMSMs to provide all the cosmological DM density indicated by Planck and other observations, and we impose the upper limits on spin-independent and -dependent scattering from direct DM search experiments. We also impose all relevant LHC constraints from searches for monojet events and measurements of the dijet mass spectrum. We model the likelihood functions for all the constraints and combine them within the MasterCode framework, and probe the full DMSM parameter spaces by scanning over the mediator and DM masses and couplings, not fixing any of the model parameters. We find, in general, two allowed regions of the parameter spaces: one in which the mediator couplings to Standard Model (SM) and DM particles may be comparable to those in the SM and the cosmological DM density is reached via resonant annihilation, and one in which the mediator couplings to quarks are ≲10-3 and DM annihilation is non-resonant. We find that the DM and mediator masses may well lie within the ranges accessible to LHC experiments. We also present predictions for spin-independent and -dependent DM scattering, and present specific results for ranges of the DM couplings that may be favoured in ultraviolet completions of the DMSMs.

Published
2019

5. Global analysis of dark matter simplified models with leptophobic spin-one mediators using MasterCode

Author

Bagnaschi, E., primary, Costa, J. C., additional, Sakurai, K., additional, Borsato, M., additional, Buchmueller, O., additional, De Roeck, A., additional, Dolan, M. J., additional, Ellis, J. R., additional, Flächer, H., additional, Hahn, K., additional, Heinemeyer, S., additional, Lucio, M., additional, Santos, D. Martínez, additional, Olive, K. A., additional, Trifa, S., additional, and Weiglein, G., additional

Published
2019
Full Text
View/download PDF

6. Global analysis of dark matter simplified models with leptophobic spin-one mediators using MasterCode

Author

Ministerio de Economía y Competitividad (España), European Commission, Bagnaschi, E., Costa, J. C., Sakurai, K., Borsato, M., Buchmueller, O., Roeck, A. de, Dolan, M. J., Ellis, J. R., Flächer, H., Hahn, K., Heinemeyer, Sven, Lucio, M., Martínez Santos, D., Olive, K. A., Trifa, S., Weiglein, G., Ministerio de Economía y Competitividad (España), European Commission, Bagnaschi, E., Costa, J. C., Sakurai, K., Borsato, M., Buchmueller, O., Roeck, A. de, Dolan, M. J., Ellis, J. R., Flächer, H., Hahn, K., Heinemeyer, Sven, Lucio, M., Martínez Santos, D., Olive, K. A., Trifa, S., and Weiglein, G.

Abstract

We report the results of a global analysis of dark matter simplified models (DMSMs) with leptophobic mediator particles of spin one, considering the cases of both vector and axial-vector interactions with dark matter (DM) particles and quarks. We require the DMSMs to provide all the cosmological DM density indicated by Planck and other observations, and we impose the upper limits on spin-independent and -dependent scattering from direct DM search experiments. We also impose all relevant LHC constraints from searches for monojet events and measurements of the dijet mass spectrum. We model the likelihood functions for all the constraints and combine them within the MasterCode framework, and probe the full DMSM parameter spaces by scanning over the mediator and DM masses and couplings, not fixing any of the model parameters. We find, in general, two allowed regions of the parameter spaces: one in which the mediator couplings to Standard Model (SM) and DM particles may be comparable to those in the SM and the cosmological DM density is reached via resonant annihilation, and one in which the mediator couplings to quarks are ≲10-3 and DM annihilation is non-resonant. We find that the DM and mediator masses may well lie within the ranges accessible to LHC experiments. We also present predictions for spin-independent and -dependent DM scattering, and present specific results for ranges of the DM couplings that may be favoured in ultraviolet completions of the DMSMs.

Published
2019

Catalog

Books, media, physical & digital resources
See catalog results