LHC limits on gluinos and squarks in the minimal Dirac gaugino model

Autor: Sabine Kraml, Humberto Reyes-González, Sophie L. Williamson, Guillaume Chalons, Mark D. Goodsell
Přispěvatelé: Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Laboratoire de Physique Théorique et Hautes Energies (LPTHE), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)
Rok vydání: 2018
Předmět:
Nuclear and High Energy Physics
Particle physics
Physics beyond the Standard Model
gluino: pair production
FOS: Physical sciences
01 natural sciences
High Energy Physics - Experiment
High Energy Physics - Experiment (hep-ex)
Chargino
High Energy Physics - Phenomenology (hep-ph)
0103 physical sciences
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
lcsh:Nuclear and particle physics. Atomic energy. Radioactivity
010306 general physics
Physics
Gluino
010308 nuclear & particles physics
new physics
High Energy Physics::Phenomenology
Gaugino
minimal supersymmetric standard model
Supersymmetry
Coupling (probability)
squark: production
High Energy Physics - Phenomenology
squark: mass: lower limit
gaugino: Dirac
Supersymmetry Phenomenology
[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
Neutralino
lcsh:QC770-798
High Energy Physics::Experiment
supersymmetry
gluino: mass: lower limit
Minimal Supersymmetric Standard Model
Zdroj: Journal of High Energy Physics
Journal of High Energy Physics, Springer, 2019, 04, pp.113. ⟨10.1007/JHEP04(2019)113⟩
JHEP
JHEP, 2019, 04, pp.113. ⟨10.1007/JHEP04(2019)113⟩
Journal of High Energy Physics, Vol 2019, Iss 4, Pp 1-28 (2019)
ISSN: 1126-6708
1029-8479
DOI: 10.48550/arxiv.1812.09293
Popis: Dirac gauginos are a well-motivated extension of the MSSM, leading to interesting phenomenological consequences. At the LHC, gluino-pair production is enhanced while squark production is suppressed as compared to the MSSM, and the decay signatures are altered by a more complex chargino and neutralino spectrum. We investigate how this impacts current gluino and squark mass limits from Run~2 of the LHC. Concretely, we compare different assumptions about the electroweak-ino spectrum through four benchmark models paying particular attention to the effect of the trilinear $\lambda_S$ coupling, which induces a mass splitting between the mostly bino/U(1) adjoint states. Among other results, we show that for large $\lambda_S$ the additional $\tilde\chi^0_2\to f\bar f \tilde\chi^0_1$ decays somewhat weaken the limits on gluinos (squarks) in the case of heavy squarks (gluinos). Moreover, we compare the limits in the gluino vs. squark mass plane to those obtained in equivalent MSSM scenarios.
Comment: 28 pages, 10 figures, data files available at https://zenodo.org/record/2422747, published version
Databáze: OpenAIRE
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