scholarly journals Real and complex fundamental partial compositeness

2020 ◽  
Vol 2020 (7) ◽  
Author(s):  
Alessandro Agugliaro ◽  
Francesco Sannino
Keyword(s):  
Partial Compositeness

scholarly journals A more natural composite Higgs model

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Hsin-Chia Cheng ◽  
Yi Chung
Keyword(s):  
Standard Model ◽  
Higgs Model ◽  
Quadratic Term ◽  
Beyond The Standard Model ◽  
Higgs Potential ◽  
Little Higgs ◽  
Composite Higgs ◽  
Partial Compositeness ◽  
Quartic Term ◽  
Natural Composite

Abstract Composite Higgs models provide an attractive solution to the hierarchy problem. However, many realistic models suffer from tuning problems in the Higgs potential. There are often large contributions from the UV dynamics of the composite resonances to the Higgs potential, and tuning between the quadratic term and the quartic term is required to separate the electroweak breaking scale and the compositeness scale. We consider a composite Higgs model based on the SU(6)/Sp(6) coset, where an enhanced symmetry on the fermion resonances can minimize the Higgs quadratic term. Moreover, a Higgs quartic term from the collective symmetry breaking of the little Higgs mechanism can be realized by the partial compositeness couplings between elementary Standard Model fermions and the composite operators, without introducing new elementary fields beyond the Standard Model and the composite sector. The model contains two Higgs doublets, as well as several additional pseudo-Nambu-Goldstone bosons. To avoid tuning, the extra Higgs bosons are expected to be relatively light and may be probed in the future LHC runs. The deviations of the Higgs couplings and the weak gauge boson couplings also provide important tests as they are expected to be close to the current limits in this model.

scholarly journals On Partial Compositeness and the CP asymmetry in charm decays

2013 ◽  
Vol 867 (2) ◽  
pp. 394-428 ◽  
Author(s):  
Boaz Keren-Zur ◽  
Paolo Lodone ◽  
Marco Nardecchia ◽  
Duccio Pappadopulo ◽  
Riccardo Rattazzi ◽  
...  
Keyword(s):  
Cp Asymmetry ◽  
Charm Decays ◽  
Partial Compositeness

scholarly journals Supersymmetry with a pNGB Higgs and partial compositeness

2014 ◽  
Vol 2014 (3) ◽  
Author(s):  
David Marzocca ◽  
Alberto Parolini ◽  
Marco Serone
Keyword(s):  
Partial Compositeness

scholarly journals Electroweak top couplings, partial compositeness, and top partner searches

2020 ◽  
Vol 102 (7) ◽  
Author(s):  
Stephen Brown ◽  
Christoph Englert ◽  
Peter Galler ◽  
Panagiotis Stylianou
Keyword(s):  
Partial Compositeness

scholarly journals Fundamental partial compositeness

2016 ◽  
Vol 2016 (11) ◽  
Author(s):  
Francesco Sannino ◽  
Alessandro Strumia ◽  
Andrea Tesi ◽  
Elena Vigiani
Keyword(s):  
Partial Compositeness

scholarly journals Minimal fundamental partial compositeness

2018 ◽  
Vol 98 (1) ◽  
Author(s):  
Giacomo Cacciapaglia ◽  
Helene Gertov ◽  
Francesco Sannino ◽  
Anders Eller Thomsen
Keyword(s):  
Partial Compositeness

scholarly journals Compositeness above the electroweak scale and a proposed test at LHCb

2022 ◽  
Vol 258 ◽  
pp. 08002
Author(s):  
Gabriele Ferretti
Keyword(s):  
Gauge Theories ◽  
Main Idea ◽  
Electroweak Scale ◽  
Recent Proposal ◽  
Strongly Coupled ◽  
Partial Compositeness ◽  
Lhcb Detector ◽  
Pseudo Scalar

I review attempts to construct models of partial compositeness from strongly coupled gauge theories. A few minimal assumptions allow one to isolate a small number of representative models. After presenting the main idea, I discuss a recent proposal to detect a light pseudo-scalar, predicted in all these models, at the LHCb detector.

scholarly journals Exploring new possibilities to discover a light pseudo-scalar at LHCb

2022 ◽  
Vol 82 (1) ◽  
Author(s):  
Diogo Buarque Franzosi ◽  
Giacomo Cacciapaglia ◽  
Xabier Cid Vidal ◽  
Gabriele Ferretti ◽  
Thomas Flacke ◽  
...  
Keyword(s):  
Mass Region ◽  
Decay Channels ◽  
Composite Higgs ◽  
Partial Compositeness ◽  
Tau Pairs ◽  
Muon Pairs ◽  
Pseudo Scalar

AbstractWe study the possibility of observing a light pseudo-scalar a at LHCb. We target the mass region $$2.5\,\mathrm{GeV}\lesssim m_a\lesssim 60\,\mathrm{GeV}$$ 2.5 GeV ≲ m a ≲ 60 GeV and various decay channels, some of which have never been considered before: muon pairs, tau pairs, D meson pairs, and di-photon. We interpret the results in the context of models of 4D Composite Higgs and Partial Compositeness in particular.

scholarly journals Neutrino masses from low scale partial compositeness

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Zackaria Chacko ◽  
Patrick J. Fox ◽  
Roni Harnik ◽  
Zhen Liu
Keyword(s):  
Beta Decay ◽  
Form Factors ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Neutrino Masses ◽  
Hidden Sector ◽  
Partial Compositeness ◽  
Order Of Magnitude ◽  
Partially Composite ◽  
Compositeness Scale

Abstract We consider a class of models in which the neutrinos acquire Majorana masses through mixing with singlet neutrinos that emerge as composite states of a strongly coupled hidden sector. In this framework, the light neutrinos are partially composite particles that obtain their masses through the inverse seesaw mechanism. We focus on the scenario in which the strong dynamics is approximately conformal in the ultraviolet, and the compositeness scale lies at or below the weak scale. The small parameters in the Lagrangian necessary to realize the observed neutrino masses can naturally arise as a consequence of the scaling dimensions of operators in the conformal field theory. We show that this class of models has interesting implications for a wide variety of experiments, including colliders and beam dumps, searches for lepton flavor violation and neutrinoless double beta decay, and cosmological observations. At colliders and beam dumps, this scenario can give rise to striking signals involving multiple displaced vertices. The exchange of hidden sector states can lead to observable rates for flavor violating processes such as μ → eγ and μ → e conversion. If the compositeness scale lies at or below a hundred MeV, the rate for neutrinoless double beta decay is suppressed by form factors and may be reduced by an order of magnitude or more. The late decays of relic singlet neutrinos can give rise to spectral distortions in the cosmic microwave background that are large enough to be observed in future experiments.

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