Results 71 to 80 of about 6,269,157 (262)

Threshold resummation for dark-matter production at the LHC

open access: yesJournal of High Energy Physics, 2019
We derive precision predictions for the production of dark-matter particles recoiling against a jet with large transverse momentum at the LHC. The dark-matter fermions are described within a simplified model and couple to the Standard Model via a vector ...
M. Krämer   +3 more
doaj   +1 more source

Beyond The Standard Model

open access: yes, 2004
The present lectures contain an introduction to possible new physics beyond the Standard Model. Having in mind first of all accelerator experiments of the nearest future we concentrate on supersymmetry, a new symmetry that relates bosons and fermions, as
Kazakov, D. I.
core   +1 more source

Running of fermion observables in non-supersymmetric SO(10) models

open access: yesJournal of High Energy Physics, 2018
We investigate the complete renormalization group running of fermion observables in two different realistic non-supersymmetric models based on the gauge group SO(10) with intermediate symmetry breaking for both normal and inverted neutrino mass orderings.
Tommy Ohlsson, Marcus Pernow
doaj   +1 more source

Gravitational wave and CMB probes of axion kination

open access: yesJournal of High Energy Physics, 2022
Rotations of an axion field in field space provide a natural origin for an era of kination domination, where the energy density is dominated by the kinetic term of the axion field, preceded by an early era of matter domination.
Raymond T. Co   +6 more
doaj   +1 more source

Beyond the Standard Model for Montaneros [PDF]

open access: yes, 2009
These notes cover (i) electroweak symmetry breaking in the Standard Model (SM) and the Higgs boson, (ii) alternatives to the SM Higgs boson including an introduction to composite Higgs models and Higgsless models that invoke extra dimensions, (iii) the ...
Bustamante, M., Cieri, L., Ellis, John
core   +2 more sources

Search for physics beyond the standard model in multilepton final states in proton-proton collisions at $\sqrt{s} =$ 13 TeV [PDF]

open access: yes, 2019
A search for physics beyond the standard model in events with at least three charged leptons (electrons or muons) is presented. The data sample corresponds to an integrated luminosity of 137 fb$^{-1}$ of proton-proton collisions at $\sqrt{s} =$ 13 TeV ...
A. Sirunyan   +499 more
semanticscholar   +1 more source

Beyond the Standard Model

open access: yes, 2010
Six major frameworks have emerged attempting to describe particle physics beyond the Standard Model. Despite their different theoretical genera, these frameworks have a number of common phenomenological features and problems.
Lykken, Joseph D.
core   +1 more source

HERA Physics Beyond the Standard Model [PDF]

open access: yes, 1999
The prospects of physics beyond the standard model in deep inelastic scattering are reviewed, emphasizing some scenarios which attained attention after the observation of an excess of events with large momentum transfer at HERA.Comment: 8 pages, LaTeX ...
  +32 more
core   +2 more sources

Dark matter in E 6 Grand unification

open access: yesJournal of High Energy Physics, 2018
We discuss fermionic dark matter in non-supersymmetric E 6 Grand Unification. The fundamental representation of E 6 contains, in addition to the standard model fermions, exotic fermions and we argue that one of them is a viable, interesting dark matter ...
Jakob Schwichtenberg
doaj   +1 more source

Gravitational waves and dark photon dark matter from axion rotations

open access: yesJournal of High Energy Physics, 2021
An axion rotating in field space can produce dark photons in the early universe via tachyonic instability. This explosive particle production creates a background of stochastic gravitational waves that may be visible at pulsar timing arrays or other ...
Raymond T. Co   +2 more
doaj   +1 more source

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