433 citations · 2.6k across the 50 of their papers we have counts for
42 papers · 1 filter
Measurements of the electron-helicity asymmetry in the quasi-elastic process
Tim Kolar, Sebouh J. Paul, Patrick Achenbach +43
We present measurements of the electron helicity asymmetry in quasi-elastic proton knockout from H and C nuclei by polarized electrons. This asymmetry depends on the f…
Polarization transfer to bound protons measured by quasi-elastic electron scattering on C
Tilen Brecelj, Sebouh J. Paul, Tim Kolar +29
We report the measurements of the transverse () and longitudinal () components of the polarization transfer to a bound proton in carbon via the quasi-free $^{12}{\rm C}(\…
Virtual Compton Scattering measurements in the nucleon resonance region
A. Blomberg, H. Atac, N. Sparveris +25
We report on new measurements of the electric Generalized Polarizability (GP) of the proton in a kinematic region where a puzzling dependence on momentum transfer has been ob…
The influence of Fermi motion on the comparison of the polarization transfer to a proton in elastic and quasi-elastic scattering
S. Paul, T. Brecelj, H. Arenhövel +35
A comparison between polarization-transfer to a bound proton in quasi-free kinematics by the A knockout reaction and that in elastic scattering off a free proto…
Components of polarization-transfer to a bound proton in a deuteron measured by quasi-elastic electron scattering
A1 Collaboration, D. Izraeli, I. Yaron +33
We report the first measurements of the transverse ( and ) and longitudinal () components of the polarization transfer to a bound proton in the deuteron via th…
Measurement of polarization-transfer to bound protons in carbon and its virtuality dependence
A1 Collaboration, D. Izraeli, T. Brecelj +26
We measured the ratio of the transverse to longitudinal components of polarization transferred from electrons to bound protons in by the $^{12}\math…
First measurement of proton's charge form factor at very low with initial state radiation
M. Mihovilovič, A. B. Weber, P. Achenbach +36
We report on a new experimental method based on initial-state radiation (ISR) in e-p scattering, in which the radiative tail of the elastic e-p peak contains information on the pro…
Feasibility study for the measurement of TDAs at PANDA in
PANDA Collaboration, B. Singh, W. Erni +508
The exclusive charmonium production process in annihilation with an associated meson is studied in the framework of QCD collinear factorizatio…
Measurement of the reaction close to threshold and at low
A1 Collaboration, I. Friščić, P. Achenbach +21
The cross section of the reaction has been measured for five kinematic settings at an invariant mass of MeV and for a four-momentum transfer of $Q^2 = 0.07…
Polarization-transfer measurement to a large-virtuality bound proton in the deuteron
A1 Collaboration, I. Yaron, D. Izraeli +28
Possible differences between free and bound protons may be observed in the ratio of polarization-transfer components, . We report the measurement of , in the…
Observation of Lambda H-4 hyperhydrogen by decay-pion spectroscopy in electron scattering
A. Esser, S. Nagao, F. Schulz +38
At the Mainz Microtron MAMI, the first high-resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a Be-9 target in order to study the…
Measurement of the neutron electric to magnetic form factor ratio at Q2 = 1.58 GeV2 using the reaction 3He(e,e'n)pp
B. S. Schlimme, P. Achenbach, C. A. Ayerbe Gayoso +29
A measurement of beam helicity asymmetries in the reaction 3He(e,e'n)pp has been performed at the Mainz Microtron in quasielastic kinematics in order to determine the electric to m…
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…
The electric and magnetic form factors of the proton
A1 Collaboration, J. C. Bernauer, M. O. Distler +21
The paper describes a precise measurement of electron scattering off the proton at momentum transfers of \ GeV. The average point-to-point error…
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…
Reply to Comment on "High-Precision Determination of the Electric and Magnetic Form Factors of the Proton"
J. C. Bernauer, P. Achenbach, C. Ayerbe Gayoso +22
In arXiv:1108.3058v1 [nucl-ex], Arrington criticizes the Coulomb corrections we applied in the analysis of high precision form factor data (see Phys.Rev.Lett.105:242001, 2010, arXi…
Exclusive electroproduction of K+ Lambda and K+ Sigma^0 final states at Q^2 = 0.030-0.055 (GeV/c)^2
P. Achenbach, C. Ayerbe Gayoso, J. C. Bernauer +32
Cross section measurements of the exclusive p(e,e'K+)Lambda,Sigma^0 electroproduction reactions have been performed at the Mainz Microtron MAMI in the A1 spectrometer facility usin…
Search for Light Gauge Bosons of the Dark Sector at the Mainz Microtron
H. Merkel, P. Achenbach, C. Ayerbe Gayoso +19
A new exclusion limit for the electromagnetic production of a light U(1) gauge boson γ' decaying to e^+e^- was determined by the A1 Collaboration at the Mainz Microtron. Such light…
High-precision determination of the electric and magnetic form factors of the proton
J. C. Bernauer, P. Achenbach, C. Ayerbe Gayoso +22
New precise results of a measurement of the elastic electron-proton scattering cross section performed at the Mainz Microtron MAMI are presented. About 1400 cross sections were mea…
Investigation of the Exclusive ^{3}He(e,e'pn)p Reaction
D. G. Middleton, J. R. M. Annand, M. Ases Antelo +46
Cross sections for the ^{3}He(e,e'pn)p reaction were measured for the first time at energy transfers of 220 and 270 MeV for several momentum transfers ranging from 300 to 450 MeV/c…
The f_LT Response Function of D(e,e'p)n at Q^2=0.33(GeV/c)^2
W. U. Boeglin, H. Arenhövel, K. I. Blomqvist +31
The interference response function f_LT (R_LT) of the D(e,e'p)n reaction has been determined at squared four-momentum transfer Q^2 = 0.33 (GeV/c)^2 and for missing momenta up to p_…
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…
A new measurement of the structure functions and in virtual Compton scattering at 0.33 (GeV/c)
A1 Collaboration, P. Janssens, L. Doria +36
The cross section of the reaction has been measured at (GeV/c). The experiment was performed using the electron beam of the MAMI accelerator and t…
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…