Results 41 to 50 of about 4,570 (100)

Threshold Two-Pion Photo- and Electroproduction: More neutrals than expected

, 1994
We present an exploratory study of two pion photo-- and electroproduction off the nucleon in the threshold region. To calculate the pertinent amplitudes, we make use of heavy baryon chiral perturbation theory.
A. Schmidt, Amaldi, Beck, Benmerrouche, Bernard, Bernard, Bernard, Bernard, Bernard, Bernard, Bernard, Bernard, Dahm, Jenkins, Laget, Mazzucato, Meiβner, Meiβner, N. Kaiser, Park, Ulf-G. Meiβner, V. Bernard, Weinberg, Weinberg, Welch   +24 more
core   +3 more sources

How strange is pion electroproduction?

Physics Letters B, 2016
We consider pion production in parity-violating electron scattering (PVES) in the presence of nucleon strangeness in the framework of partial wave analysis with unitarity. Using the experimental bounds on the strange form factors obtained in elastic PVES, we study the sensitivity of the parity-violating asymmetry to strange nucleon form factors.
Gorchtein, Mikhail, Spiesberger, Hubert, Zhang, Xilin   +2 more
openaire   +3 more sources

An improved hadronic model for pion electroproduction

Physics Letters B, 2020
Current measurements of the high energy behavior of the pion form factor are obtained from pion electroproduction data. These values are model dependent, utilizing the Vanderhaeghen, Guidal and Laget Regge (VGL) Model for their extraction. Recent work which examined the implementation of gauge invariance in that model suggested that it might lead to ...
Robert J. Perry, Ayşe Kızılersü, Anthony W. Thomas   +2 more
openaire   +4 more sources

Unitary Isobar Model - MAID2007

, 2007
The unitary isobar model MAID2007 has been developed to analyze the world data of pion photo- and electroproduction. The model contains both a common background and several resonance terms.
Ahrens, Ahrens, Arndt, Arndt, Arndt, Ash, Aznauryan, Aznauryan, Bartalini, Bartalini, Bartholomy, Beck, Bernard, Buchmann, Chen, Chew, D. Drechsel, Drechsel, Drechsel, Drechsel, Dugger, Egiyan, Elsner, Frolov, Gellas, Gilman, Hand, Hanstein, Jones, Joo, Joo, Joo, Kamalov, Kamalov, Kamalov, Kamalov, Kelly, Kelly, Knöchlein, L. Tiator, Laget, Laveissiere, Li, Mertz, Pascalutsa, Pospischil, S. S. Kamalov, Sato, Schmidt, Shafi, Stave, Tiator, Ungaro, Yao)   +53 more
core   +1 more source

Two Photon Exchange for Exclusive Pion Electroproduction

, 2012
We perform detailed calculations of two-photon-exchange QED corrections to the cross section of pion electroproduction. The results are obtained with and without the soft-photon approximation; analytic expressions for the radiative corrections are ...
Afanasev, A., Aleksejevs, A., Barkanova, S.   +2 more
core   +1 more source

Observation of coherent $\pi^0$ electroproduction on deuterons at large momentum transfer [PDF]

, 2003
The first experimental results for coherent $\pi^0$-electroproduction on the deuteron, $e+d\to e+d +\pi^0$, at large momentum transfer, are reported. The experiment was performed at Jefferson Laboratory at an incident electron energy of 4.05 GeV. A large
Bimbot, L., Danagoulian, S., Gustafsson, K., Mack, D., Mrktchyan, H., Rekalo, M. P., Tomasi-Gustafsson, E.   +6 more
core   +3 more sources

Measurements of inclusive pion electroproduction

Nuclear Physics B, 1974
Abstract Measurements of the inclusive pion electroproduction reaction e − +p → e − + π ± +X made at the Wilson Synchrotron Laboratory are reported. Data were taken at points with nominal ( Q 2 , W ) values of (0.6, 2.67), (1.2, 2.67), (2.0, 2.67) and (1.2, 2.15) in (GeV 2 , GeV). A more complete angular distribution was taken at (1.2, 2.67).
C.J. Bebek, C.N. Brown, M. Herzlinger, C.A. Lichtenstein, F.M. Pipkin, L.K. Sisterson, D. Andrews, K. Berkelman, D.G. Cassel, D.L. Hartill   +9 more
openaire   +1 more source

Near threshold neutral pion electroproduction on deuterium in chiral perturbation theory [PDF]

, 2002
Near threshold neutral pion electroproduction on the deuteron is studied in the framework of baryon chiral perturbation theory at next-to-leading order in the chiral expansion.
Bernard, V., Krebs, H., Meißner, Ulf-G.
core   +3 more sources

Study of the A(e,e'$\pi^+$) Reaction on $^1$H, $^2$H, $^{12}$C, $^{27}$Al, $^{63}$Cu and $^{197}$Au

, 2009
Cross sections for the p($e,e'\pi^{+}$)n process on $^1$H, $^2$H, $^{12}$C, $^{27}$Al, $^{63}$Cu and $^{197}$Au targets were measured at the Thomas Jefferson National Accelerator Facility (Jefferson Lab) in order to extract the nuclear transparencies ...
A. Aste, A. Bruell, A. Daniel, A. F. Lung, A. H. Mueller, A. K. Opper, A. Matsumura, A. Villano, A. W. Rauf, B. Clasie, C. E. Keppel, C. Gray, C. Perdrisat, D. Day, D. Dutta, D. G. Meekins, D. Gaskell, D. Rohe, E. Chudakov, E. Segbefia, F. Benmokhtar, F. R. Wesselmann, G. M. Huber, G. Niculescu, G. R. Smith, H. C. Fenker, H. Gao, H. Mkrtchyan, I. Niculescu, J. Arrington, J. Ferrer, J. Seely, K. Garrow, K. Kramer, L. El Fassi, L. Tang, L. Yuan, M. E. Christy, M. K. Jones, M. M. Dalton, M. Sumihama, N. Fomin, N. Kalantarians, P. Bosted, P. Markowitz, R. Asaturyan, R. Ent, R. J. Glauber, R. Monson, S. A. Wood, S. J. Brodsky, S. Malace, T. Horn, T. Mertens, T. Miyoshi, T. Navasardyan, V. M. Rodriquez, V. Punjabi, V. Tadevosyan, W. Boeglin, W. F. Vulcan, X. Qian, X. Zheng, Y. Li, Y. Liang, Y. Okayasu   +65 more
core   +1 more source

Electroproduction of nucleon resonances

, 2003
The unitary isobar model MAID has been extended and used for a partial wave analysis of pion photo- and electroproduction in the resonance region W < 2 GeV.
C Mertz, D Drechsel, GS Bali, K Hagiwara, K Joo, M Aiello, M Ferraris, M Sanctis De, M Sanctis De, MM Giannini, N Isgur, R Beck, RA Arndt, S Boffi, S Kamalov, SN Yang, SS Kamalov, Th Pospischil, VV Frolov   +18 more
core   +1 more source