206 citations · 956 across the 21 of their papers we have counts for
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Measurements of the γ* p --> Δ(1232) reaction at low Q2
N. Sparveris, S. Stave, P. Achenbach +29
We report new p measurements in the resonance at the low momentum transfer region utilizing the magnetic spectrometers of the A1 Collabor…
Consistent threshold pi0 electro-production at Q^2=0.05, 0.10, and 0.15 GeV^2/c^2
H. Merkel, P. Achenbach, C. Ayerbe Gayoso +22
New, accurate data are presented on the near threshold p(e,e'p)pi^0 reaction in the range of four-momentum transfers between Q^2=0.05 and 0.15GeV^2/c^2. The data were taken with th…
Virtual Compton Scattering measurements in the transition
N. F. Sparveris, P. Achenbach, C. Ayerbe Gayoso +30
We report on new H measurements in the resonance at (GeV/c) carried out simultaneously with H. It is the lowest for w…
Separated cross sections in π^0 electroproduction at threshold at Q^2 = 0.05 GeV^2/c^2
M. Weis, P. Bartsch, D. Baumann +26
The differential cross sections σ_0=σ_T+εσ_L, σ_{LT}, and σ_{TT} of π^0 electroproduction from the proton were measured from threshold up to an additional center of mass energy of…
Determination of quadrupole strengths in the gamma*p-->Delta(1232) transition at Q2= 0.20 (GeV/c)2
N. F. Sparveris, P. Achenbach, C. Ayerbe Gayoso +29
We report new precise p measurements at the peak of the resonance at $Q^2=\unit[0.20](GeV/c)^2$ performed at the Mainz Microtron (MAMI). The…
Lowest Q^2 Measurement of the gamma*p -> Delta Reaction: Probing the Pionic Contribution
S. Stave, M. O. Distler, I. Nakagawa +29
To determine nonspherical angular momentum amplitudes in hadrons at long ranges (low Q^2), data were taken for the p(\vec{e},e'p)π^0 reaction in the Delta region at Q^2=0.060 (GeV/…
Measurement of the LT-asymmetry in π^0 electroproduction at the energy of the Δ(1232) resonance
D. Elsner, A. Süle, P. Barneo +29
The reaction p(e,e'p)pi^0 has been studied at Q^2=0.2 (GeV/c)^2 in the region of W=1232 MeV. From measurements left and right of q, cross section asymmetries ρ_LT have been obtaine…
Measurement of the asymmetries in 3He(e,e'p)d and 3He(e,e'p)np
P. Achenbach, D. Baumann, R. Boehm +48
The electron-target-asymmetries A_parallel and A_perpendicular with target spin parallel and perpendicular to the momentum transfer q were measured for both the two-- and three-bod…
Measurement of the Electric Form Factor of the Neutron at Q^2 = 0.3-0.8 (GeV/c)^2
D. I. Glazier, M. Seimetz, J. R. M. Annand +41
The electric form factor of the neutron, G_En, has been measured at the Mainz Microtron by recoil polarimetry in the quasielastic D(e_pol,e'n_pol)p reaction. Three data points have…
Search for Narrow Nucleon Resonances below Pion Threshold in the H(e,e'pi^+)X and D(e,e'p)X Reactions
M. Kohl, M. Ases Antelo, C. Ayerbe +23
In two series of high-resolution coincidence experiments at the three-spectrometer facility at MAMI, the H(e,e'pi^+)X and D(e,e'p)X reactions were studied to search for narrow nucl…
The neutron charge form factor and target analyzing powers from pol.3He(pol e,e'n)-scattering
J. Bermuth, P. Merle, C. C. Carasco +40
The charge form factor of the neutron has been determined from asymmetries measured in quasi--elastic pol.3He(pol e,e'n) at a momentum transfer of 0.67(GeV/c)^2. In addition, the t…
Final State Interaction Effects in pol 3He(pol e,e'p)
C. Carasco, J. Bermuth, P. Merle +40
Asymmetries in quasi-elastic pol 3He(pol e,e'p) have been measured at a momentum transfer of 0.67 (GeV/c)^2 and are compared to a calculation which takes into account relativistic…
Measurement of the beam-helicity asymmetry in the p(e_pol,e'p)pi_0 reaction at the energy of the Delta(1232) resonance
P. Bartsch, D. Baumann, J. Bermuth +32
In a p(e_pol,e'p)pi_0 out-of-plane coincidence experiment at the 3-spectrometer setup of the Mainz Microtron MAMI, the beam-helicity asymmetry has been precisely measured around th…
Neutral pion threshold production at Q^2=0.05 GeV^2/c^2 and Chiral Perturbation Theory
Harald Merkel, Peter Bartsch, Dagmar Baumann +31
New data are presented on the p(e,e'p)π^0 reaction at threshold at a four-momentum transfer of Q^2=0.05 GeV^2/c^2. The data were taken with the three-spectrometer setup of the A1 C…
Precise Neutron Magnetic Form Factors
G. Kubon, H. Anklin, P. Bartsch +36
Precise data on the neutron magnetic form factor G_{mn} have been obtained with measurements of the ratio of cross sections of D(e,e'n) and D(e,e'p) up to momentum transfers of Q^2…
Self energies of the pion and the delta isobar from the ^3He(e,e'pi^+)^3H reaction
M. Kohl, M. Kuss, C. Rangacharyulu +7
In a kinematically complete experiment at the Mainz microtron MAMI, pion angular distributions of the He(e,e'H reaction have been measured in the excitation region of t…
Measurement of the recoil polarization in the p (\vec e, e' \vec p) pi^0 reaction at the Δ(1232) resonance
Th. Pospischil, P. Bartsch, D. Baumann +39
The recoil proton polarization has been measured in the p (\vec e,e'\vec p) pi^0 reaction in parallel kinematics around W = 1232 MeV, Q^2 = 0.121 (GeV/c)^2 and epsilon = 0.718 usin…
The focal plane proton-polarimeter for the 3-spectrometer setup at MAMI
T. Pospischil, P. Bartsch, D. Baumann +46
For experiments of the type A(\vec e,e'\vec p) the 3-spectrometer setup of the A1 collaboration at MAMI has been supplemented by a focal plane proton-polarimeter. To this end, a ca…
Coherent π^0 threshold production from the deuteron at Q^2 = 0.1 GeV^2/c^2
Ingo Ewald, Peter Bartsch, Dagmar Baumann +29
First data on coherent threshold π^0 electroproduction from the deuteron taken by the A1 Collaboration at the Mainz Microtron MAMI are presented. At a four-momentum transfer of q^2…
The Longitudinal and Transverse Response of the 4He(e,e'p) Reaction in the Dip Region
A1 Mainz Helium Collaboration, A. Kozlov
A high-resolution study of the (e,e'p) reaction on Helium-4 was carried out at the Institut fuer Kernphysik in Mainz, Germany. The measurements were done in parallel kinematics (mo…