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Liu, D1; Pomarol, A2,3,4; Rattazzi, R1; Riva, F2
Patterns of strong coupling for LHC searches
Source PublicationJOURNAL OF HIGH ENERGY PHYSICS
Language英语
KeywordBeyond Standard Model ELECTROWEAK SYMMETRY-BREAKING Effective field theories COMPOSITE HIGGS-MODEL Global Symmetries PHENOMENOLOGICAL LAGRANGIANS Technicolor and Composite Models VACUUM MISALIGNMENT FIELD-THEORIES SUPERSYMMETRY CONSTRAINT SECTOR FLAVOR QUARKS
AbstractEven though the Standard Model (SM) is weakly coupled at the Fermi scale, a new strong dynamics involving its degrees of freedom may conceivably lurk at slightly higher energies, in the multi TeV range. Approximate symmetries provide a structurally robust context where, within the low energy description, the dimensionless SM couplings are weak, while the new strong dynamics manifests itself exclusively through higher- derivative interactions. We present an exhaustive classification of such scenarios in the form of effective field theories, paying special attention to new classes of models where the strong dynamics involves, along with the Higgs boson, the SM gauge bosons and/or the fermions. The IR softness of the new dynamics suppresses its effects at LEP energies, but deviations are in principle detectable at the LHC, even at energies below the threshold for production of new states. We believe our construction provides the so far unique structurally robust context where to motivate several LHC searches in Higgs physics, diboson production, or W W scattering. Perhaps surprisingly, the interplay between weak coupling, strong coupling and derivatives, which is controlled by symmetries, can override the naive expansion in operator dimension, providing instances where dimension-8 dominates dimension-6, well within the domain of validity of the low energy effective theory. This result reveals the limitations of an analysis that is both ambitiously general and restricted to dimension-6 operators.
2016
Issue11Pages:141
Subject AreaPhysics
DOIhttp://dx.doi.org/10.1007/JHEP11(2016)141
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/23249
Collection理论物理所科研产出_SCI论文
Affiliation1.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing, Peoples R China
2.Ecole Polytech Fed Lausanne, Inst Phys, Theoret Particle Phys Lab, CH-1015 Lausanne, Switzerland
3.CERN, Theoret Phys Dept, CH-1211 Geneva 23, Switzerland
4.Univ Autonoma Barcelona, Dept Fis, E-08193 Barcelona, Spain
5.Univ Autonoma Barcelona, IFAE BIST, E-08193 Barcelona, Spain
Recommended Citation
GB/T 7714
Liu, D,Pomarol, A,Rattazzi, R,et al. Patterns of strong coupling for LHC searches[J]. JOURNAL OF HIGH ENERGY PHYSICS,2016(11):141.
APA Liu, D,Pomarol, A,Rattazzi, R,&Riva, F.(2016).Patterns of strong coupling for LHC searches.JOURNAL OF HIGH ENERGY PHYSICS(11),141.
MLA Liu, D,et al."Patterns of strong coupling for LHC searches".JOURNAL OF HIGH ENERGY PHYSICS .11(2016):141.
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