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Particle physics and Gravity Beyond the Standard Model: Warped structures, Chameleons and Holography

Grant number: 18/11721-4
Support type:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): September 15, 2018
Effective date (End): September 14, 2019
Field of knowledge:Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
Principal Investigator:Rogério Rosenfeld
Grantee:Sylvain Pierre Joseph Fichet
Supervisor abroad: Mark B. Wise
Home Institution: Instituto de Física Teórica (IFT). Universidade Estadual Paulista (UNESP). Campus de São Paulo. São Paulo , SP, Brazil
Local de pesquisa : California Institute of Technology, United States  
Associated to the scholarship:14/21477-2 - Particle physics at the TeV scale and beyond: models and interpretations, BP.PD


Physics beyond the Standard Model (SM) may lie beyond the TeV scale and be typically probed by the LHC, or may be light and very weakly coupled to the SM, forming then a ``dark sector'' possibly modifying gravity at long distance. This research project proposes directions covering both paradigms. We will explore the possibility that the dark sector be a conformal field theory (CFT) broken in the IR. This model has a dual realization in AdS space. We will also develop a double holography formalism that may have interesting consequences to further understand the emergence of poles from a CFT. This holographic dark sector model also provides UV-completion to modified gravity theories and features an elegant extradimensional chameleon mechanism. Hence we will also develop the idea of chameleon supersymmetry breaking, where supersymmetry is broken only in regions of high matter density like the Earth, which may be a solution to the cosmological constant problem. AdS space has been used to solve the hierarchy problem by Randall and Sundrum. Following this intuition we will explore the possibility of explaining the electroweak hierarchy problem using warping in field space, from a nearly-hyperbolic scalar manifold. The conformal dark sector may require new probes to be detected. Hence we plan to study the synergy between the proposed FASER detector and the existing forward proton detectors recently installed at the LHC.

Scientific publications (7)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
FICHET, SYLVAIN. Braneworld effective field theories - holography, consistency and conformal effects. Journal of High Energy Physics, n. 4 APR 3 2020. Web of Science Citations: 0.
COSTANTINO, ALEXANDRIA; FICHET, SYLVAIN; TANEDO, PHILIP. Exotic spin-dependent forces from a hidden sector. Journal of High Energy Physics, n. 3 MAR 25 2020. Web of Science Citations: 0.
FICHET, SYLVAIN; SARASWAT, PRASHANT. Approximate symmetries and gravity. Journal of High Energy Physics, n. 1 JAN 15 2020. Web of Science Citations: 1.
BRAX, PHILIPPE; FICHET, SYLVAIN; TANEDO, PHILIP. The warped dark sector. Physics Letters B, v. 798, NOV 10 2019. Web of Science Citations: 1.
FICHE, SYLVAIN. Opacity and effective field theory in anti-de Sitter backgrounds. Physical Review D, v. 100, n. 9 NOV 4 2019. Web of Science Citations: 0.
BRAX, PHILIPPE; FICHET, SYLVAIN. Quantum chameleons. Physical Review D, v. 99, n. 10 MAY 20 2019. Web of Science Citations: 3.
BUCKLEY, ANDY; CITRON, MATTHEW; FICHET, SYLVAIN; KRAML, SABINE; WALTENBERGER, WOLFGANG; WARDLE, NICHOLAS. The simplified likelihood framework. Journal of High Energy Physics, n. 4 APR 8 2019. Web of Science Citations: 0.

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