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8 results on '"Raklev, Are"'

1. The GAMBIT Universal Model Machine: from Lagrangians to likelihoods

Author

Sanjay Bloor, Tomás E. Gonzalo, Pat Scott, Christopher Chang, Are Raklev, José Eliel Camargo-Molina, Anders Kvellestad, Janina J. Renk, Peter Athron, and Csaba Balázs

Subjects
Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, FOS: Physical sciences, QC770-798, Astrophysics, 01 natural sciences, Subatomär fysik, QB460-466, High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Nuclear and particle physics. Atomic energy. Radioactivity, Subatomic Physics, 0103 physical sciences, ddc:530, 010306 general physics, Engineering (miscellaneous)
Abstract

We introduce the GAMBIT Universal Model Machine (GUM), a tool for automatically generating code for the global fitting software framework GAMBIT, based on Lagrangian-level inputs. GUM accepts models written symbolically in FeynRules and SARAH formats, and can use either tool along with MadGraph and CalcHEP to generate GAMBIT model, collider, dark matter, decay and spectrum code, as well as GAMBIT interfaces to corresponding versions of SPheno, micrOMEGAs, Pythia and Vevacious (C++). In this paper we describe the features, methods, usage, pathways, assumptions and current limitations of GUM. We also give a fully worked example, consisting of the addition of a Majorana fermion simplified dark matter model with a scalar mediator to GAMBIT via GUM, and carry out a corresponding fit., 32 pages, 6 figures, 3 tables

Published
2021

3. Xsec: the cross-section evaluation code

Author

Jon Vegard Sparre, Pat Scott, Anders Kvellestad, Jeriek van den Abeele, Ingrid A. Vazquez-Holm, Are Raklev, Andrew Buckley, Institut de Physique Théorique - UMR CNRS 3681 (IPHT), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics and Astronomy (miscellaneous), neural network, Physics beyond the Standard Model, gluino: pair production, parton: distribution function, Parton, lcsh:Astrophysics, 01 natural sciences, programming, symbols.namesake, 0103 physical sciences, lcsh:QB460-466, Applied mathematics, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, squark: pair production, Resummation, 010306 general physics, Engineering (miscellaneous), Gaussian process, Physics, total cross section: calculated, Large Hadron Collider, flavor, 010308 nuclear & particles physics, hadron: colliding beams, new physics: search for, higher-order: 1, minimal supersymmetric standard model, Supersymmetry, Distribution function, CERN LHC Coll, resummation, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], symbols, lcsh:QC770-798, supersymmetry, Minimal Supersymmetric Standard Model
Abstract

The evaluation of higher-order cross-sections is an important component in the search for new physics, both at hadron colliders and elsewhere. For most new physics processes of interest, total cross-sections are known at next-to-leading order (NLO) in the strong coupling $$\alpha _s$$ α s , and often beyond, via either higher-order terms at fixed powers of $$\alpha _s$$ α s , or multi-emission resummation. However, the computation time for such higher-order cross-sections is prohibitively expensive, and precludes efficient evaluation in parameter-space scans beyond two dimensions. Here we describe the software tool , which allows for fast evaluation of cross-sections based on the use of machine-learning regression, using distributed Gaussian processes trained on a pre-generated sample of parameter points. This first version of the code provides all NLO Minimal Supersymmetric Standard Model strong-production cross-sections at the LHC, for individual flavour final states, evaluated in a fraction of a second. Moreover, it calculates regression errors, as well as estimates of errors from higher-order contributions, from uncertainties in the parton distribution functions, and from the value of $$\alpha _s$$ α s . While we focus on a specific phenomenological model of supersymmetry, the method readily generalises to any process where it is possible to generate a sufficient training sample.

Published
2020
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4. Xsec: the cross-section evaluation code

Author

Buckley, Andy, primary, Kvellestad, Anders, additional, Raklev, Are, additional, Scott, Pat, additional, Sparre, Jon Vegard, additional, Van den Abeele, Jeriek, additional, and Vazquez-Holm, Ingrid A., additional

Published
2020
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5. Global fits of GUT-scale SUSY models with GAMBIT

Author

The GAMBIT Collaboration, Athron, Peter, Bal��zs, Csaba, Bringmann, Torsten, Buckley, Andy, Chrz��szcz, Marcin, Conrad, Jan, Cornell, Jonathan M., Dal, Lars A., Edsj��, Joakim, Farmer, Ben, Jackson, Paul, Krislock, Abram, Kvellestad, Anders, Mahmoudi, Farvah, Martinez, Gregory D., Putze, Antje, Raklev, Are, Rogan, Christopher, de Austri, Roberto Ruiz, Saavedra, Aldo, Savage, Christopher, Scott, Pat, Serra, Nicola, Weniger, Christoph, White, Martin, Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), GAMBIT, University of Zurich, Athron, Peter, GRAPPA (ITFA, IoP, FNWI), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Centre de Recherche Astrophysique de Lyon ( CRAL ), École normale supérieure - Lyon ( ENS Lyon ) -Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Annecy-le-Vieux de Physique Théorique ( LAPTH ), and Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
Physics and Astronomy (miscellaneous), [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], chargino, supersymmetry: 3, dark matter: direct detection, Parameter space, 01 natural sciences, High Energy Physics - Phenomenology (hep-ph), S046PHC, stau, Grand Unified Theory, Physics, Large Hadron Collider, Electroweak interaction, minimal supersymmetric standard model, hep-ph, CERN LEP Stor, Supersymmetry, Nuclear & Particles Physics, High Energy Physics - Phenomenology, grand unified theory, Higgs particle: mass, astro-ph.CO, Higgs boson, neutralino: dark matter, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics and Astronomy, Particle physics, interpretation of experiments: CERN LHC Coll, Cosmology and Nongalactic Astrophysics (astro-ph.CO), 530 Physics, Dark matter, FOS: Physical sciences, lcsh:Astrophysics, 10192 Physics Institute, 0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics, lcsh:QB460-466, 0103 physical sciences, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, 3101 Physics and Astronomy (miscellaneous), 010306 general physics, 0206 Quantum Physics, Engineering (miscellaneous), Particle Physics - Phenomenology, flavor, electroweak interaction, 010308 nuclear & particles physics, dark matter: relic density, High Energy Physics::Phenomenology, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], lcsh:QC770-798, [ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], High Energy Physics::Experiment, 2201 Engineering (miscellaneous), [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Minimal Supersymmetric Standard Model
Abstract

We present the most comprehensive global fits to date of three supersymmetric models motivated by grand unification: the Constrained Minimal Supersymmetric Standard Model (CMSSM), and its Non-Universal Higgs Mass generalisations NUHM1 and NUHM2. We include likelihoods from a number of direct and indirect dark matter searches, a large collection of electroweak precision and flavour observables, direct searches for supersymmetry at LEP and Runs I and II of the LHC, and constraints from Higgs observables. Our analysis improves on existing results not only in terms of the number of included observables, but also in the level of detail with which we treat them, our sampling techniques for scanning the parameter space, and our treatment of nuisance parameters. We show that stau co-annihilation is now ruled out in the CMSSM at more than 95\% confidence. Stop co-annihilation turns out to be one of the most promising mechanisms for achieving an appropriate relic density of dark matter in all three models, whilst avoiding all other constraints. We find high-likelihood regions of parameter space featuring light stops and charginos, making them potentially detectable in the near future at the LHC. We also show that tonne-scale direct detection will play a largely complementary role, probing large parts of the remaining viable parameter space, including essentially all models with multi-TeV neutralinos., Comment: 50 pages, 21 figures, 7 tables, v2 accepted for publication in EPJC, v3 update Zenodo link

Published
2017

6. Boosted objects: a probe of beyond the standard model physics

Author

Abdesselam, A., primary, Belyaev, A., additional, Kuutmann, E. Bergeaas, additional, Bitenc, U., additional, Brooijmans, G., additional, Butterworth, J., additional, de Renstrom, P. Bruckman, additional, Franzosi, D. Buarque, additional, Buckingham, R., additional, Chapleau, B., additional, Dasgupta, M., additional, Davison, A., additional, Dolen, J., additional, Ellis, S., additional, Fassi, F., additional, Ferrando, J., additional, Frandsen, M. T., additional, Frost, J., additional, Gadfort, T., additional, Glover, N., additional, Haas, A., additional, Halkiadakis, E., additional, Hamilton, K., additional, Hays, C., additional, Hill, C., additional, Jackson, J., additional, Issever, C., additional, Karagoz, M., additional, Katz, A., additional, Kreczko, L., additional, Krohn, D., additional, Lewis, A., additional, Livermore, S., additional, Loch, P., additional, Maksimovic, P., additional, March-Russell, J., additional, Martin, A., additional, McCubbin, N., additional, Newbold, D., additional, Ott, J., additional, Perez, G., additional, Policchio, A., additional, Rappoccio, S., additional, Raklev, A. R., additional, Richardson, P., additional, Salam, G. P., additional, Sannino, F., additional, Santiago, J., additional, Schwartzman, A., additional, Shepherd-Themistocleous, C., additional, Sinervo, P., additional, Sjoelin, J., additional, Son, M., additional, Spannowsky, M., additional, Strauss, E., additional, Takeuchi, M., additional, Tseng, J., additional, Tweedie, B., additional, Vermilion, C., additional, Voigt, J., additional, Vos, M., additional, Wacker, J., additional, Wagner-Kuhr, J., additional, and Wilson, M. G., additional

Published
2011
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8. Collider aspects of flavor physics at high Q

Author

Lari, T., primary, Pape, L., additional, Porod, W., additional, Aguilar-Saavedra, J. A., additional, Allanach, B. C., additional, Burdman, G., additional, Castro, N., additional, Klasen, M., additional, Krasnikov, N., additional, Krauss, F., additional, Moortgat, F., additional, Polesello, G., additional, Tricomi, A., additional, Ünel, G., additional, del Aguila, F., additional, Alwall, J., additional, Andreev, Y., additional, Sierra, D. Aristizabal, additional, Bartl, A., additional, Beccaria, M., additional, Béjar, S., additional, Benucci, L., additional, Bityukov, S., additional, Borjanović, I., additional, Bozzi, G., additional, Carvalho, J., additional, Clerbaux, B., additional, de Campos, F., additional, de Gouvêa, A., additional, Dennis, C., additional, Djouadi, A., additional, Éboli, O. J. P., additional, Ellwanger, U., additional, Fassouliotis, D., additional, Ferreira, P. M., additional, Frederix, R., additional, Fuks, B., additional, Gerard, J.-M., additional, Giammanco, A., additional, Gninenko, S., additional, Gopalakrishna, S., additional, Goto, T., additional, Grzadkowski, B., additional, Guasch, J., additional, Hahn, T., additional, Heinemeyer, S., additional, Hektor, A., additional, Herquet, M., additional, Herrmann, B., additional, Hidaka, K., additional, Hirsch, M. K., additional, Hohenwarter-Sodek, K., additional, Hollik, W., additional, Hou, G. W. S., additional, Hurth, T., additional, Ibarra, A., additional, Illana, J., additional, Kadastik, M., additional, Kalinin, S., additional, Karafasoulis, C., additional, Ünel, M. Karagöz, additional, Kernreiter, T., additional, Kirsanov, M. M., additional, Kou, E., additional, Kourkoumelis, C., additional, Kraml, S., additional, Kyriakis, A., additional, Lemaitre, V., additional, Macorini, G., additional, Magro, M. B., additional, Majerotto, W., additional, Maltoni, F., additional, Matveev, V., additional, Mehdiyev, R., additional, Misiak, M., additional, Moreau, G., additional, Mühlleitner, M., additional, Müntel, M., additional, Onofre, A., additional, Özcan, E., additional, Palla, F., additional, Panizzi, L., additional, Peñaranda, S., additional, Pittau, R., additional, Pukhov, A., additional, Raidal, M., additional, Raklev, A. R., additional, Rebane, L., additional, Renard, F. M., additional, Restrepo, D., additional, Roupas, Z., additional, Santos, R., additional, Schumann, S., additional, Servant, G., additional, Siegert, F., additional, Skands, P., additional, Slavich, P., additional, Solà, J., additional, Spira, M., additional, Sultansoy, S., additional, Toropin, A., additional, Tseng, J., additional, Valle, J. W. F., additional, Veloso, F., additional, Ventura, A., additional, Vermisoglou, G., additional, Verzegnassi, C., additional, Villanova del Moral, A., additional, Weiglein, G., additional, and Yılmaz, M., additional

Published
2008
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