Results 21 to 30 of about 27,754 (198)

The Contribution of Methane Photoproduction to the Oceanic Methane Paradox

open access: yesGeophysical Research Letters, 2020
Although methanogenesis is considered a strictly anaerobic process, oxygen‐replete surface open‐ocean waters are usually supersaturated with methane (CH4), a phenomenon termed the oceanic methane paradox.
Y. Li   +4 more
doaj   +1 more source

Eta and Etaprime Photoproduction on the Nucleon with the Isobar Model EtaMAID2018 [PDF]

open access: yesEPJ Web of Conferences, 2019
The isobar model EtaMAID has been updated with new and high precision data for η and η′ photoproduction on protons and neutrons from MAMI, ELSA, GRAAL and CLAS.
Tiator L.   +9 more
doaj   +1 more source

The impact of final-state interaction on the πΣ photoproduction in the Λ(1405) region [PDF]

open access: yesEPJ Web of Conferences, 2022
It was recently demonstrated [1] that the meson-baryon rescattering in the final state has a major impact on the magnitude and structure of the πΣ mass distributions observed in the γp → K+πΣ photoproduction.
Cieplý Aleš, Bruns Peter C.
doaj   +1 more source

Exclusive Vector Photoproduction: Confirmation of Regge Theory [PDF]

open access: yes, 1999
Recent small-t ZEUS data for exclusive rho photoproduction are in excellent agreement with exchange of the classical soft pomeron with slope alpha'=0.25 GeV^{-2}. Adding in a flavour-blind hard-pomeron contribution, whose magnitude is calculated from the
A Donnachie   +10 more
core   +2 more sources

Photoproduction of $\eta$ mesons off neutrons from a deuteron target [PDF]

open access: yes, 2008
A formalism is developed for the partial wave analysis of data on meson photoproduction off deuterons and applied to photoproduction of $\eta$ and $\pi^0$ mesons.
Anisovich, A. V.   +6 more
core   +1 more source

Inelastic photoproduction [PDF]

open access: yesPhysics Letters B, 1995
Inelastic photoproduction of $J/ $ particles at high energies is one of the processes to determine the gluon distribution in the nucleon. We have calculated the QCD radiative corrections to the color-singlet model of this reaction. They are large at moderate photon energies, but decrease with increasing energies.
M. Krämer   +3 more
openaire   +4 more sources

Photoproduction [PDF]

open access: yesAIP Conference Proceedings, 1997
Some selected topics in photoproduction are reviewed. In particular, the focus is on quasi-real photon-proton scattering as measured at HERA. Single & dijet rates and jet profiles are discussed, as are open charm production and inelastic charmonium production.
openaire   +3 more sources

A Stepwise NaHSO3 Addition Mode Greatly Improves H2 Photoproduction in Chlamydomonas reinhardtii

open access: yesFrontiers in Plant Science, 2018
NaHSO3 addition greatly increases the yield of H2 photoproduction in a unicellular green alga Chlamydomonas reinhardtii through removing O2 and activating hydrogenase but significantly impairs the activity of PSII, an electron source for H2 ...
Lanzhen Wei   +4 more
doaj   +1 more source

Predictions for exclusive $$\varUpsilon $$ Υ photoproduction in ultraperipheral $${\textrm{Pb}}+{\textrm{Pb}}$$ Pb + Pb collisions at the LHC at next-to-leading order in perturbative QCD

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
We present predictions for the rapidity-differential cross sections of exclusive $$\varUpsilon $$ Υ photoproduction in ultraperipheral collisions (UPCs) of lead ions at the Large Hadron Collider (LHC).
Kari J. Eskola   +4 more
doaj   +1 more source

Photoproduction of hidden charm pentaquark states $P_c^+(4380)$ and $P_c^+(4450)$ [PDF]

open access: yes, 2015
We propose to study the pentaquark candidates of $P_c^+(4380)$ and $P_c^+(4450)$ in $J/\psi$ photoproduction and look for further experimental evidence for their nature. Since the photoproduction process does not satisfy the so-called "anomalous triangle
Liu, Xiao-Hai, Wang, Qian, Zhao, Qiang
core   +2 more sources

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