Results 51 to 60 of about 200,127 (222)

Plate tectonics in the microscopy realm: Molecular insights into morphological variability of Peridinium willei (Peridiniales, Dinophyceae)

open access: yesTAXON, EarlyView.
Abstract Freshwater Peridinium willei (Peridiniaceae) is globally distributed, but reports linking its morphologies with DNA sequence data remain scarce. The taxonomy of the species, and its infraspecific taxa, remain ambiguous due to the lack of DNA sequence data for the original and type material.
Arwin Ahmadpur   +17 more
wiley   +1 more source

Search for vector-like T and B quark pairs in final states with leptons at s=13 $$ \sqrt{s}=13 $$ TeV

open access: yesJournal of High Energy Physics, 2018
A search is presented for pair production of heavy vector-like T and B quarks in proton-proton collisions at s=13 $$ \sqrt{s}=13 $$ TeV. The data sample corresponds to an integrated luminosity of 35.9 fb−1, collected with the CMS detector at the CERN LHC
The CMS collaboration   +2291 more
doaj   +1 more source

Dark Matter Searches with Top Quarks

open access: yesUniverse, 2022
Collider signatures with top quarks provide sensitive probes of dark matter (DM) production at the Large Hadron Collider (LHC). In this article, we review the results of DM searches in final states with top quarks conducted by the ATLAS and CMS ...
J. Katharina Behr, Alexander Grohsjean
doaj   +1 more source

Up quark masses from down quark masses [PDF]

open access: yesPhysics Letters B, 2006
11 pages, 1 figure.
MASINA, Isabella, C. A. Savoy
openaire   +3 more sources

Record phenological responses to climate change in three sympatric penguin species

open access: yesJournal of Animal Ecology, EarlyView.
This paper is impressive because we managed to monitor extensively a really difficult place to reach and operate in. We deployed 77 cameras across Antarctica and the Sub Antarctic islands to monitor three different species of penguins. We found that they are the fastest advancing vertebrates with respect to their timing of breeding.
Ignacio Juarez Martinez   +8 more
wiley   +1 more source

Disproportional ventilatory response to incremental exercise in individuals with cerebral palsy

open access: yesDevelopmental Medicine &Child Neurology, EarlyView.
Individuals with cerebral palsy demonstrate a disproportionate ventilatory response during incremental exercise. Compared with typically developing peers, respiratory frequency increases earlier and at comparable exercise intensities, contributing to higher perceived exertion and reduced ventilatory efficiency. At task failure, respiratory frequency is
Linnéa Corell   +14 more
wiley   +1 more source

Constraints on the quark mixing matrix with vector-like quarks

open access: yesNuclear Physics B, 2020
While a chiral fourth generation of quarks is almost ruled out from the data on Higgs boson production and decay at the Large Hadron Collider, vector-like quarks are still a feasible option to extend the fermionic sector of the Standard Model.
Drona Vatsyayan, Anirban Kundu
doaj   +1 more source

Local spin alignment of vector mesons in relativistic heavy-ion collisions

open access: yesPhysics Letters B, 2021
We investigate the spin alignment of vector mesons arising from locally polarized quarks and anti-quarks (local spin alignment) in heavy-ion collisions.
Xiao-Liang Xia   +3 more
doaj   +1 more source

The spectrum of static-light baryons in twisted mass lattice QCD [PDF]

open access: yes, 2010
We compute the static-light baryon spectrum with N_f = 2 flavors of sea quarks using Wilson twisted mass lattice QCD. As light valence quarks we consider quarks, which have the same mass as the sea quarks with corresponding pion masses in the range 340 ...
Wagner, Marc, Wiese, Christian
core   +1 more source

Proton Spin Based On Chiral Dynamics [PDF]

open access: yes, 1999
Chiral spin fraction models agree with the proton spin data only when the chiral quark-Goldstone boson couplings are pure spinflip. For axial-vector coupling from soft-pion physics this is true for massless quarks but not for constituent quarks.
Weber, H. J.
core   +2 more sources

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