Results 31 to 40 of about 142,364 (240)
Direct bounds on heavy toplike quarks with standard and exotic decays [PDF]
, 2017 Heavy vector-like quarks with electric charge $Q=2/3$ (also called \textit{heavy tops}) appear naturally in many extensions of the Standard Model. Although these typically predict the existence of further particles below the TeV scale, direct searches ...
M. Chala
semanticscholar +1 more source
Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector [PDF]
, 2015 A search for pair production of vector-like quarks, both up-type (T ) and downtype (B), as well as for four-top-quark production, is presented. The search is based on pp collisions at √ s = 8TeV recorded in 2012 with the ATLAS detector at the CERN Large ...
Atlas Collaboration
semanticscholar +2 more sources
Exotic signals of vectorlike quarks [PDF]
Journal of Physics G: Nuclear and Particle Physics, 2016 Vectorlike fermions are an important target for hadron collider searches. We show that the vectorlike quarks may predominantly decay via higher-dimensional operators into a quark plus a couple of other Standard Model fermions.
B. Dobrescu, F. Yu
semanticscholar +1 more source
Heavy Quark Fluorescence [PDF]
Physical Review Letters, 2010 Heavy hadrons containing heavy quarks (for example, Upsilon-mesons) feature a scale separation between the heavy quark mass (about 4.5 GeV for the b-quark) and the QCD scale (about 0.3 GeV}) that controls effective masses of lighter constituents. Therefore, as in ordinary molecules, the de-excitation of the lighter, faster degrees of freedom leaves the
Torres Rincón, Juan Miguel +1 more
openaire +5 more sources
Novel signatures for vector-like quarks [PDF]
, 2017 A bstractWe consider supersymmetric extensions of the standard model with a vector-like doublet (T B) of quarks with charge 2/3 and −1/3, respectively.
J. A. Aguilar-Saavedra +4 more
semanticscholar +1 more source
Physical Review D, 1993 We investigate the heavy baryons which arise as solitonic excitations in a ``heavy meson" chiral Lagrangian which includes the light vector particles. It is found that the effect of the light vectors may be substantial. We also present a simple derivation which clearly shows the connection to the Callan-Klebanov approach.
Schechter, Joseph +3 more
openaire +3 more sources
Physical Review Letters, 2018 A combination of the searches for pair-produced vectorlike partners of the top and bottom quarks in various decay channels (T→Zt/Wb/Ht, B→Zb/Wt/Hb) is performed using 36.1 fb^{-1} of pp collision data at sqrt[s]=13 TeV with the ATLAS detector at the ...
M. Aaboud
semanticscholar +1 more source
Directed flow of charm quarks as a witness of the initial strong magnetic field in ultra-relativistic heavy ion collisions [PDF]
, 2016 Ultra-relativistic Heavy-Ion Collision (HIC) generates very strong initial magnetic field ( B → ) inducing a vorticity in the reaction plane. The high B → influences the evolution dynamics that is opposed by the large Faraday current due to electric ...
S. Das +5 more
semanticscholar +1 more source
Hadron–Quark Combustion as a Nonlinear, Dynamical System
Universe, 2018 The hadron–quark combustion front is a system that couples various processes, such as chemical reactions, hydrodynamics, diffusion, and neutrino transport. Previous numerical work has shown that this system is very nonlinear, and can be very sensitive to
Amir Ouyed +2 more
doaj +1 more source
Signals with six bottom quarks for charged and neutral Higgs bosons
Journal of High Energy Physics, 2020 In extensions of two Higgs doublet models with vectorlike quarks, the decays of vectorlike quarks may easily be dominated by cascade decays through charged or neutral Higgs bosons leading to signatures with 6 top or bottom quarks.
Radovan Dermisek +3 more
doaj +1 more source