Results 71 to 80 of about 3,598,117 (378)

Twin Higgs portal dark matter

open access: yesJournal of High Energy Physics, 2021
Many minimal models of dark matter (DM) or canonical solutions to the hierarchy problem are either excluded or severely constrained by LHC and direct detection null results. In particular, Higgs Portal Dark Matter (HPDM) features a scalar coupling to the
David Curtin, Shayne Gryba
doaj   +1 more source

Neutrinos and physics beyond the standard model [PDF]

open access: yesNuclear Physics B - Proceedings Supplements, 1997
A brief sketch is made of the present observational status of neutrino physics, with emphasis on the hints that follow from solar and atmospheric neutrino observations, as well as cosmological data on the amplitude of primordial density fluctuations. I also briefly review the ways to account for the observed anomalies and some of their implications.
openaire   +4 more sources

Searching for Beyond the Standard Model Physics with COHERENT Energy and Timing Data. [PDF]

open access: yesPhysical Review Letters, 2019
We search for beyond the standard model physics by combining COHERENT Collaboration energy and timing data. Focusing on light, ≲GeV mediators, we find the data favor a ∼10-1000  MeV mediator, as compared to the standard model best fit at the ≲2σ level ...
B. Dutta, S. Liao, S. Sinha, L. Strigari
semanticscholar   +1 more source

Physics beyond the standard model with kaons at NA62 [PDF]

open access: yesAIP Conference Proceedings, 2020
The NA62 experiment at CERN Super Proton Synchrotron was designed to measure BR(K+ → π+νv¯) with an in-fight technique, never used before for this measurement. This decay is characterised by a very precise prediction in the Standard Model. Its branching ratio, which is expected to be less than 10−10, is one of the best candidates to indicate indirect ...
Massarotti P.   +189 more
openaire   +5 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

B physics beyond the Standard Model at one loop: complete renormalization group evolution below the electroweak scale [PDF]

open access: yesJournal of High Energy Physics, 2017
General analyses of B-physics processes beyond the Standard Model require accounting for operator mixing in the renormalization-group evolution from the matching scale down to the typical scale of B physics.
Jason Aebischer   +3 more
semanticscholar   +1 more source

High-scale leptogenesis with three-loop neutrino mass generation and dark matter

open access: yesJournal of High Energy Physics, 2017
We demonstrate a common origin for high-scale leptogenesis and three-loop neutrino mass generation. Specifically we extend the standard model by two real singlet scalars, two singly charged scalars carrying different quantum numbers under certain global ...
Pei-Hong Gu
doaj   +1 more source

Relaxing cosmological neutrino mass bounds with unstable neutrinos

open access: yesJournal of High Energy Physics, 2020
At present, cosmological observations set the most stringent bound on the neutrino mass scale. Within the standard cosmological model (ΛCDM), the Planck collaboration reports ∑m v < 0.12 eV at 95 % CL.
Miguel Escudero   +3 more
doaj   +1 more source

Machine learning templates for QCD factorization in the search for physics beyond the standard model [PDF]

open access: yesJournal of High Energy Physics, 2019
High-multiplicity all-hadronic final states are an important, but difficult final state for searching for physics beyond the Standard Model. A powerful search method is to look for large jets with accidental substructure due to multiple hard partons ...
J. Lin, W. Bhimji, B. Nachman
semanticscholar   +1 more source

Mass hierarchy and physics beyond the Standard Model

open access: yesEPJ Web of Conferences, 2014
I discuss the status of the mass hierarchy problem and prospects for beyond the Standard Model physics in the light of the Higgs scalar discovery at the LHC and the experimental searches for new physics.
Antoniadis Ignatios
doaj   +1 more source

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