Results 71 to 80 of about 288 (133)

Probing the top-Higgs sector with composite Higgs models at present and future hadron colliders

Journal of High Energy Physics, 2021
We study the production of t t ¯ h $$ t\overline{t}h $$ and t t ¯ hh $$ t\overline{t} hh $$ at hadron colliders, in the minimal Composite Higgs Models, based on the coset SO(5)/SO(4). We explore the fermionic representations 5 and 14.
Carlos Bautista, Leonardo de Lima, Ricardo D’Elia Matheus, Eduardo Pontón, Leônidas A. Fernandes do Prado, Aurore Savoy-Navarro   +5 more
doaj   +1 more source

Deciphering the minimum of energy of some walking technicolor models

, 2010
There are quasiconformal theories, like the minimal and ultraminimal technicolor models, which may break dynamically the gauge symmetry of the standard model and at the same time are compatible with electroweak precision data.
Natale, Adriano Antonio [UNESP], Natale, A. A. [UNESP], Natale, Adriano Antonio, Doff, A.   +3 more
core   +1 more source

Neutrino masses from low scale partial compositeness

Journal of High Energy Physics, 2021
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.
Zackaria Chacko, Patrick J. Fox, Roni Harnik, Zhen Liu   +3 more
doaj   +1 more source

Hypercharged naturalness

Journal of High Energy Physics, 2019
We present an exceptional twin-Higgs model with the minimal symmetry structure for an exact implementation of twin parity along with custodial symmetry.
Javi Serra, Stefan Stelzl, Riccardo Torre, Andreas Weiler   +3 more
doaj   +1 more source

Very light dilaton and naturally light Higgs boson

Journal of High Energy Physics, 2018
We study very light dilaton, arising from a scale-invariant ultraviolet theory of the Higgs sector in the standard model of particle physics. Imposing the scale symmetry below the ultraviolet scale of the Higgs sector, we alleviate the fine-tuning ...
Deog Ki Hong
doaj   +1 more source

Constraining scalar resonances with top-quark pair production at the LHC

Journal of High Energy Physics, 2018
Constraints on models which predict resonant top-quark pair production at the LHC are provided via a reinterpretation of the Standard Model (SM) particle level measurement of the top-anti-top invariant mass distribution, m t t ¯ $$ m\left(t\overline{t ...
Diogo Buarque Franzosi, Federica Fabbri, Steffen Schumann   +2 more
doaj   +1 more source

Twin Higgs with exact Z 2

Journal of High Energy Physics, 2020
We present a novel mechanism for realistic electroweak symmetry breaking in Twin Higgs/neutral naturalness models where the Z 2 exchange symmetry can remain exactly unbroken.
Csaba Csáki, Cong-Sen Guan, Teng Ma, Jing Shu   +3 more
doaj   +1 more source

Testing a dynamical origin of standard model fermion masses [PDF]

, 2016
We discuss a test of the Standard Model fermion mass origin in models of dynamical electroweak symmetry breaking. The couplings of composite pseudoscalar resonances to top quarks allow us to distinguish high-scale extended-technicolor-type fermion mass ...
Frandsen, Mads T., Franzosi, Diogo Buarque, Alanne, Tommi, Frandsen, Mads Toudal; id_orcid, Buarque Franzosi, Diogo   +4 more
core   +1 more source

Naturalness sum rules and their collider tests

Journal of High Energy Physics, 2019
We present the most general sum rules reflecting the cancellation of ultraviolet divergences in the Higgs potential, which provide necessary conditions for any weakly-coupled extension of the Standard Model to be natural. There is a separate sum rule for
Csaba Csáki, Felipe Ferreira De Freitas, Li Huang, Teng Ma, Maxim Perelstein, Jing Shu   +5 more
doaj   +1 more source

Testing naturalness at 100 TeV

Journal of High Energy Physics, 2017
Solutions to the electroweak hierarchy problem typically introduce a new symmetry to stabilize the quadratic ultraviolet sensitivity in the self-energy of the Higgs boson.
Chuan-Ren Chen, Jan Hajer, Tao Liu, Ian Low, Hao Zhang   +4 more
doaj   +1 more source