Results 11 to 20 of about 40,039,274 (254)

E- and F-region coupling between an intense sporadic E layer and a mesoscale traveling ionospheric disturbance [PDF]

open access: yesAnnales Geophysicae, 2009
Considerable controversy exists concerning the relative roles of the E- and F-regions in controlling irregularity formation in the mid-latitude ionosphere, largely because electric fields due to a plasma instability in one region may map to the other ...
W. E. Swartz, M. C. Kelley, N. Aponte
doaj   +3 more sources

Nighttime Midlatitude E‐F Coupling in Geomagnetic Conjugate Ionospheres: A Double Thin Shell Model and a Multi‐Source Data Investigation [PDF]

open access: yes, 2023
Geomagnetic conjugate mid-latitude nighttime ionospheres are frequently simultaneously populated with electrified nighttime medium-scale traveling ionospheric disturbances (MSTIDs).
Tatsuhiro Yokoyama   +9 more
core   +1 more source

Fe-Promoted C-F Activation of Aryl Fluorides Enables Heck-Type Coupling with Alkenes and One-Pot Synthesis of Indenes [PDF]

open access: yes, 2023
Metal-mediated aryl fluoride activation presents challenges because of the thermodynamically robust C-F bond but also provides opportunities to develop C-C coupling reactions with this unconventional electrophile.
Neal, Mankad, Maxim, Radzhabov
core   +1 more source

Phenomenology at the LHC of composite particles from strongly interacting Standard Model fermions via four-fermion operators of NJL type

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
A new physics scenario shows that four-fermion operators of Nambu-Jona-Lasinio (NJL) type have a strong-coupling UV fixed point, where composite fermions F (bosons $$\Pi $$ Π ) form as bound states of three (two) SM elementary fermions and they couple to
R. Leonardi   +5 more
doaj   +1 more source

The strong coupling limit of SU(2) QCD at finite baryon density [PDF]

open access: yes, 1986
Dagotto E, Karsch F, Moreo A. The strong coupling limit of SU(2) QCD at finite baryon density. Physics Letters, B.
Karsch, Frithjof   +5 more
core   +1 more source

E 6 Yukawa couplings in F-theory as D-brane instanton effects

open access: yesJournal of High Energy Physics, 2017
At weak coupling the neighborhood of a E 6 Yukawa point in SU(5) GUT F-theory models is described by a non-resolvable orientifold of the conifold. We explicitly show, first directly in IIB and then via a mirror symmetry argument, that in this limit the E
Andrés Collinucci   +1 more
doaj   +1 more source

Light mediators in anomaly free U (1) X models. Part II. Constraints on dark gauge bosons

open access: yesJournal of High Energy Physics, 2019
We consider experimental constraints in the MeV region in order to determine the parameter space for the U(1) X extension of the Standard Model, presented in the first part of our work. In particular, we focus on the model UV-completed by cold WIMPs.
F. C. Correia, Svjetlana Fajfer
doaj   +1 more source

Traces of electron-phonon coupling in one-dimensional cuprates

open access: yesNature Communications, 2023
The appearance of certain spectral features in one-dimensional (1D) cuprate materials has been attributed to a strong, extended attractive coupling between electrons.
Ta Tang   +4 more
doaj   +1 more source

Gauge coupling unification in E 6 F-theory GUTs with matter and bulk exotics from flux breaking

open access: yes, 2013
We consider gauge coupling unification in E 6 F-Theory Grand Unified Theories (GUTs) where E 6 is broken to the Standard Model (SM) gauge group using fluxes. In such models there are two types of exotics that can affect gauge coupling unification, namely
King, Stephen F.   +2 more
core   +1 more source

EXACT SOLUTION (BY ALGEBRAIC METHODS) OF THE LATTICE SCHWINGER MODEL IN THE STRONG-COUPLING REGIME

open access: yes, 1995
Karsch F, MEGGIOLARO E, TURKO L. EXACT SOLUTION (BY ALGEBRAIC METHODS) OF THE LATTICE SCHWINGER MODEL IN THE STRONG-COUPLING REGIME. PHYSICAL REVIEW D.
Karsch, Frithjof   +5 more
core   +1 more source

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