Results 41 to 50 of about 8,701 (188)

A BP Neural Network Based on GA for Optimizing Energy Consumption of Copper Electrowinning

Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020
In this paper, achieving minimum energy consumption in the copper electrowinning process is taken as the research objective. In the traditional production process, sulfate ion concentration, copper ion concentration, and current density are carried out according to the empirical value, which cannot ensure the energy consumption reaching the optimal ...
Jing Wu, Yanming Cheng, Cheng Liu, Ilkyoo Lee, Wenlin Huang, Luis J. Yebra   +5 more
wiley   +1 more source

Kaon Electroproduction on the Proton

Journal of Experimental and Theoretical Physics, 2021
A model of kaon photoproduction in the p(e, e′K+)Λ, p(e, e′K+)Σ0, and p(e, e′K0)Σ+ processes with the square of the momentum transfer Q2 up to 2.5 GeV2 is proposed. The photoproduction amplitude includes the s-, t-, and u-channel Born and s- and u-channel resonance contributions calculated in the tree approximation. The unitarity of the photoproduction
Egorov, M. V., Postnikov, V. I.
openaire   +2 more sources

NLO QCD corrections to exclusive electroproduction of quarkonium

Physics Letters B, 2019
The process of exclusive electroproduction of vector quarkonium (EEQ), ep→epV, is per se an interesting topic in studies of quarkonium production mechanism, QCD description of diffractive interaction and nucleon structure.
Zi-Qiang Chen, Cong-Feng Qiao
doaj   +1 more source

Electroproduction, photoproduction, and inverse electroproduction of pions in the first resonance region

, 2005
Methods are set forth for determining the hadron electromagnetic structure in the sub-$N\bar{N}$-threshold timelike region of the virtual-photon ``mass'' and for investigating the nucleon weak structure in the spacelike region from experimental data on ...
A. Bietti, D. E. Groom, D. Krupa, E. Amaldi, F. G. Tkebuchava, G. D. Alekseev, G. D. Alekseev, G. F. Chew, G. Fischer, G. Furlan, G. I. Smirnov, H. Kobrak, I. V. Amirkhanov, M. Beneventano, Miroslav Nagy, N. N. Achasov, Petr Bydžovský, R. C. E. Devenish, S. A. Goghilidze, S. B. Gerasimov, S. Dubnička, S. F. Berezhnev, S. F. Berezhnev, S. F. Berezhnev, S. F. Berezhnev, T. D. Blokhintseva, T. D. Blokhintseva, Tatiana D. Blokhintseva, V. A. Meshcheryakov, V. G. Avakov, V. M. Dubovik, V. N. Baturin, V. Rossi, V. V. Alizade, Yu. I. Ivanshin, Yu. I. Ivanshin, Yu. K. Akimov, Yu. S. Surovtsev, Yu. S. Surovtsev, Yu. S. Surovtsev, Yu. V. Kulish, Yurii S. Surovtsev   +41 more
core   +1 more source

Photoproduction and electroproduction [PDF]

Physics Reports, 1972
Abstract Various aspects of the electromagnetic interactions of hadrons (strongly interacting particles) are reviewed in these lectures. After a discussion of the properties of the electromagnetic current of the hadrons and the idea of vector meson dominance, the general features of photoproduction cross sections are presented and compared with the ...
openaire   +1 more source

An attempt to understand exclusive pi+ electroproduction

, 2009
Hard exclusive pi+ electroproduction is investigated within the handbag approach. The prominent role of the pion-pole contribution is demonstrated. It is also shown that the experimental data require a twist-3 effect which ensues from the helicity-flip ...
A. Airapetian, A. Airapetian, A. Airapetian, A. Boyarski, A.P. Bakulev, A.V. Radyushkin, C. Amsler, D. Mueller, D.Y. Ivanov, D.Y. Ivanov, E. Leader, E. Leader, H.P. Blok, H.W. Huang, H.W. Huang, I.V. Musatov, J. Blümlein, J. Botts, J.C. Collins, J.P. Santoro, K. Schilling, L. Mankiewicz, L. Mankiewicz, L.L. Frankfurt, M. Anselmino, M. Beneke, M. Diehl, M. Diehl, M. Diehl, M. Diehl, M. Diehl, M. Diehl, M. Penttinen, M. Rahnama, M. Vanderhaeghen, M. Vanderhaeghen, P. Ball, P. Hoodbhoy, P. Kroll, P. Kroll, P. Pobylitsa, P.D.B. Collins, P.K. Williams, R. Enberg, R. Jakob, R. Worden, R.J.N. Phillips, S. Ahmad, S. V. Goloskokov, S.A. Morrow, S.V. Goloskokov, S.V. Goloskokov, S.V. Goloskokov, S.V. Goloskokov, V.M. Braun, V.Y. Alexakhin   +55 more
core   +1 more source

Recent results on the nucleon resonance spectrum and structure from the CLAS detector

EPJ Web of Conferences, 2016
The CLAS detector at Jefferson Lab has provided the dominant part of all available worldwide data on exclusive meson electroproduction off protons in the resonance region.
Mokeev V. I., Aznauryan I. G., Burkert V. D., Gothe R. W.   +3 more
doaj   +1 more source

Theoretical uncertainties in exclusive electroproduction of S-wave heavy quarkonia

European Physical Journal C: Particles and Fields, 2019
In this work, we revise the conventional description of $$J/\psi (1S)$$ J/ψ(1S) , $$\Upsilon (1S)$$ Υ(1S) , $$\psi '(2S)$$ ψ′(2S) and $$\Upsilon '(2S)$$ Υ′(2S) elastic photo- and electroproduction off a nucleon target within the color dipole picture and ...
Jan Cepila, Jan Nemchik, Michal Krelina, Roman Pasechnik   +3 more
doaj   +1 more source

Energy and Q^2 dependence of elastic vectormeson production and the proton structure function F_2 [PDF]

, 1998
In the framework of the Model of the Stochastic Vacuum elastic hadron-hadron scattering, photo- and electroproduction of vectormesons and also F_2(Q^2) can be well described at center of mass energy approximately 20 GeV.
Rueter, Michael
core   +2 more sources

QCD at the amplitude level: Fock state interference in heavy quark electroproduction

Journal of High Energy Physics, 2023
Quantum chromodynamics (QCD) rigorously predicts the existence of both nonperturbative intrinsic and perturbative extrinsic heavy quark contents of nucleons.
Valery E. Lyubovitskij, Ivan Schmidt
doaj   +1 more source