Results 91 to 100 of about 96,912 (161)

Revisiting the inert scalar dark matter with vector-like quarks

Journal of High Energy Physics
The inert doublet model (IDM), a minimal extension of the Standard Model (SM), provides a scalar dark matter (DM) candidate that belongs to the additional Higgs doublet.
Prasanta Kumar Das, Shyamashish Dey, Saumyen Kundu, Santosh Kumar Rai   +3 more
doaj   +1 more source

The automation of SMEFT-assisted constraints on UV-complete models

Journal of High Energy Physics
The ongoing Effective Field Theory (EFT) program at the LHC and elsewhere is motivated by streamlining the connection between experimental data and UV-complete scenarios of heavy new physics beyond the Standard Model (BSM). This connection is provided by
Jaco ter Hoeve, Giacomo Magni, Juan Rojo, Alejo N. Rossia, Eleni Vryonidou   +4 more
doaj   +1 more source

Interpreting the 750 GeV diphoton excess within topflavor seesaw model

Nuclear Physics B, 2016
We propose that the extension of the Standard Model by typical vector-like SU(2)L doublet fermions and non-singlet scalar field can account for the observed 750 GeV diphoton excess in experimentally allowed parameter space.
Junjie Cao, Liangliang Shang, Wei Su, Fei Wang, Yang Zhang   +4 more
doaj   +1 more source

Unveiling desert region in inert doublet model assisted by Peccei-Quinn symmetry

Journal of High Energy Physics
The Inert Higgs Doublet model (IDM), assisted by Peccei-Quinn (PQ) symmetry, offers a simple but natural framework of a dark sector that accommodates Weakly Interacting Massive Particle (WIMP) and axion as dark matter components.
Anupam Ghosh, Partha Konar
doaj   +1 more source

Anomalous U(1) extension of the Standard Model

Journal of High Energy Physics
We present a set of example models in which the Standard Model (SM) symmetry group is extended by a new abelian symmetry. This additional symmetry appears anomalous in the effective low-energy theory; however, the anomalies cancel out when massive chiral
Pascal Anastasopoulos, Ignatios Antoniadis, Karim Benakli, François Rondeau   +3 more
doaj   +1 more source

Revisiting the minimal Nelson-Barr model

Journal of High Energy Physics
We revisit the minimal Nelson-Barr model for solving the strong CP problem through the idea of spontaneous CP breaking. The minimal model suffers from the quality problem, which means that the strong CP angle is generated by higher-dimensional operators ...
Kai Murai, Kazunori Nakayama
doaj   +1 more source

Colorful particle production at high-energy muon colliders

Journal of High Energy Physics
A high-energy μ + μ − collider provides a wide variety of mechanisms for the production of new heavy particles. While the reach for such particles via the direct annihilation of μ + μ − will approach the center-of-mass energy of the collider, the ...
Tao Han, Matthew Low, Tong Arthur Wu, Keping Xie   +3 more
doaj   +1 more source

Loop-induced masses for the first two generations with optimum flavour violation

Journal of High Energy Physics
A mechanism for the masses of third, second, and first generation charged fermions at the tree, 1-loop, and 2-loop levels, respectively, is proposed. The fermionic self-energy corrections that lead to this arrangement are induced through heavy vector ...
Gurucharan Mohanta, Ketan M. Patel
doaj   +1 more source

Effective description of Nelson-Barr models and the theta parameter

Journal of High Energy Physics
Nelson-Barr theories solve the strong CP problem with CP spontaneously broken at Λcp and transmitted to the CP conserving version of the SM through vector-like quarks (VLQs).
Gustavo H. S. Alves, Celso C. Nishi
doaj   +1 more source

Correction to Temperature and Bekenstein-Hawking Entropy of Kiselev Black Hole Surrounded by Quintessence. [PDF]

Entropy (Basel)
Wang C.
europepmc   +1 more source