Results 31 to 40 of about 4,570 (100)

Transversity in exclusive electroproduction of pseudoscalar mesons

, 2012
In this talk it is reported on an analysis of hard exclusive electroproduction of pseudoscalar mesons within the handbag approach. It is argued that recent measurements of pion electroproduction performed by HERMES and CLAS clearly indicate the occurence
Kroll, P.
core   +1 more source

Electroproduction of pion pairs [PDF]

Proceedings of Diffraction 06, International Workshop on Diffraction in High-Energy Physics — PoS(DIFF2006), 2007
We study hard exclusive electroproduction of two pions in the QCD factorization approach at next-to-leading order (NLO) in the strong coupling. The pion pair can be produced both in an isovector and in an isoscalar state. The angular distributi on of the produced pion pairs allows one to project out a component that depends on the interference of the ...
openaire   +1 more source

SEMI-INCLUSIVE PION ELECTROPRODUCTION WITH CLAS [PDF]

Particle Physics at the Year of Astronomy, 2010
Measurement of the semi-inclusive pi+ electroproduction off the proton, performed with CLAS detector at Jefferson Lab, has been presented. The obtained fully-differential cross sections, including the azimuthal angle between hadronic and leptonic planes, phi, allowed us to separate the phi-dependent terms.
openaire   +2 more sources

Improved analysis of neutral pion electroproduction off deuterium in chiral perturbation theory

, 2004
Near threshold neutral pion electroproduction on the deuteron is studied in the framework of heavy baryon chiral perturbation theory. We include the next-to-leading order corrections to the three-body contributions. We find an improved description of the
Arenhövel, Arenhövel, Beane, Beane, Beane, Bergstrom, Bernard, Bernard, Bernard, Bernard, Brink, Büttiker, Distler, Eden, Epelbaum, Epelbaum, Epelbaum, Epelbaum, Ewald, Friar, H. Krebs, Hanhart, Krebs, Merkel, U. -G. Meißner, V. Bernard, Weinberg   +26 more
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$\gamma^{*}N\Delta$ Form Factors from a Relativistic Dynamical Model of Pion Electroproduction [PDF]

, 2004
We obtain the electromagnetic form factors of the $\gamma N\Delta$ transition by analyzing recent pion-electroproduction data using a fully relativistic dynamical model.
G. L. Caia, H. F. Jones, J. A. Tjon, L. E. Wright, V. Pascalutsa   +4 more
core   +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
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Threshold Pion Electroproduction in Chiral Perturbation Theory

, 1993
Electroproduction of pions on the nucleon near the threshold is analyzed within the framework of baryon chiral perturbation theory. We give a thorough discussion of the low--energy theorems related to charged and neutral electropionproduction.
Adler, Adler, Ahrens, Ahrens, Amaldi, Amendolia, Beck, Berends, Bernard, Bernard, Bernard, Bernard, Bernard, Bernard, Bernard, Bernard, Bernard, Choi, Coleman, de Baenst, del Guerra, Dombey, Donoghue, Ecker, Fubini, Gasser, Gasser, Gasser, Gasser, Gasser, Gasser, Gasser, Jenkins, Kitagaki, Krause, Kroll, Meißner, Meißner, N. Kaiser, Nambu, Nambu, Nozawa, Nozawa, Ohta, Olsson, Park, Riazuddin, Scherer, Scherer, T.-S.H. Lee, Ulf-G. Meißner, V. Bernard, Vainshtein, Weinberg, Weinberg, Welch   +55 more
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Measuring longitudinal amplitudes for electroproduction of pseudoscalar mesons using recoil polarization in parallel kinematics [PDF]

, 1999
We propose a new method for measuring longitudinal amplitudes for electroproduction of pseudoscalar mesons that exploits a symmetry relation for polarization observables in parallel kinematics.
A. S. Raskin, C. Giusti, D. Drechsel, G. F. Chew, G. Knöchlein, H. F. Jones, H. Schmieden, J. J. Kelly, James J. Kelly, M. Jacob, P. Dennery, R. G. Arnold, R. L. Walker, S. Boffi, S. Boffi   +14 more
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Electroexcitation of nucleon resonances at Q^2=0.65 GeV/c^2 from a combined analysis of single- and double-pion electroproduction data

, 2005
Data on single- and double-charged pion electroproduction off protons are successfully described in the second and third nucleon resonance regions with common N* photocouplings. The analysis was carried out using separate isobar models for both reactions.
B. S. Ishkhanov, G. V. Fedotov, I. G. Aznauryan, M. Bellis, V. D. Burkert, V. D. Burkert, V. I. Mokeev, V. Mokeev   +7 more
core   +1 more source

Nucleon-to-pion transition distribution amplitudes and backward electroproduction of pions [PDF]

, 2012
Baryon to meson transition distribution amplitudes (TDAs), non-diagonal matrix elements of the nonlocal three quark operator between a nucleon and a meson state, extend the concept of generalized parton distributions. These non-perturbative objects which
Pire, B., Semenov-Tian-Shansky, K., Szymanowski, L.   +2 more
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