Results 21 to 30 of about 65,259 (237)

Search for the X (2370) and observation of eta(c) -> eta eta eta ' in J/psi -> gamma eta eta eta '

open access: yes, 2021
Using a sample of 1.31 x 10(9) J/psi events collected with the BESIII detector, we perform a study of J/psi -> gamma eta eta eta' to search for the X(2370) and eta(c) in the eta eta eta' invariant mass distribution. No significant signal for the X(2370) is observed, and we set an upper limit for the product branching fraction of B(J/psi -> gamma X(2370)
Kolcu, Onur Buğra, BESIII Collaboration
openaire   +4 more sources

New tests of variability of the speed of light.

open access: yesEPJ Web of Conferences, 2016
We present basic ideas of the varying speed of light cosmology, its formulation, benefits and problems. We relate it to the theories of varying fine structure constants and discuss some new tests (redshift drift and angular diameter distance maximum ...
Dąbrowski Mariusz P.   +3 more
doaj   +1 more source

chi_c0 and chi_c2 Decays into eta eta, eta eta', and eta' eta' Final States

open access: yes, 2006
Using a sample of 3 x 10^6 psi(2S) decays collected by the CLEO III and CLEO_c detector configurations, we present results of a study of _{c0} and _{c2} decays into eta-eta, eta-etaprime, and etaprime-etaprime final states. We find B(chi_{c0} -> eta-eta)= (0.31+-0.05+-0.04+-0.02)%, B(chi_{c0} -> eta-etaprime) <0.05 % at the 90% confidence ...
Adams, G. S., Collaboration, CLEO
openaire   +2 more sources

Intramolecular Hydrogen Bond Energy and Its Decomposition—O–H∙∙∙O Interactions

open access: yesCrystals, 2020
The method to calculate the energy of intramolecular hydrogen bond is proposed and tested for a sample of malonaldehyde and its fluorine derivatives; the corresponding calculations were performed at the ωB97XD/aug-cc-pVTZ level.
Sławomir J. Grabowski
doaj   +1 more source

eta - eta' - glueball mixing

open access: yes, 2010
We have revisited glueball mixing with the pseudoscalar mesons in the MIT bag model scheme. The calculation has been performed in the spherical cavity approximation to the bag using two different fermion propagators, the cavity and the free propagators. We obtain a very small probability of mixing for the eta at the level of $0.04-0.1% and a bigger for
Kiesewetter, Simon   +1 more
openaire   +4 more sources

3DCryoHolder: a new open access 3D printable system to store and transport silicon nitride membranes under cryogenic conditions for spectromicroscopy at low temperature

open access: yesJournal of Synchrotron Radiation
Data acquisition under cryogenic conditions allows one to avoid unwanted damage caused by beam irradiation. This is particularly important for the study of biological samples at hard X-ray, micro- or nano-probe beamlines, which focus synchrotron ...
Antonio Dominguez-Alfaro   +1 more
doaj   +1 more source

Vecinos en el punto de mira. Las víctimas del terrorismo etnonacionalista vasco en La Rioja (1978-1982)

open access: yesmethaodos.revista de ciencias sociales, 2022
Este artículo es un estudio sobre el impacto de ETA y grupos afines en La Rioja durante la transición a la democracia. Con el objetivo de radiografiar sus acciones en este territorio se realiza un acercamiento al fenómeno a través de un heterogéneo ...
David Mota Zurdo
doaj   +1 more source

¿Cuál es el rol del Dietista-Nutricionista en el sistema alimentario de 2030?

open access: yesRevista Española de Nutrición Humana y Dietética, 2020
III Congreso de Alimentación, Nutrición y Dietética. Combinar la nutrición comunitaria y personalizada: nuevos retos.
Goiuri Alberdi Aresti   +1 more
doaj   +2 more sources

Electronic media learning technologies and environmental education pedagogy in tertiary institutions in Nigeria

open access: yesSocial Sciences and Humanities Open
Previous research on applying electronic media learning tools to learning has focused on a diversity of other subjects rather than environmental education.
Benjamin Ayua Ambe   +9 more
doaj   +1 more source

Unveiling the electronic origin of lanthanide based Metal Organic Framework with ideal spin filtering capacity

open access: yesCommunications Physics
Recently, a three dimensional metal-organic framework (MOF) based on Dy(III) and the L-tartrate ligand was experimentally shown to exhibit a spin polarization (SP) power of 100% at room temperature.
Xuban Gastearena   +4 more
doaj   +1 more source

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