224 citations · 633 across the 22 of their papers we have counts for
22 papers
Nuclear density dependence of polarization transfer in quasi-elastic reactions
T. Kolar, W. Cosyn, C. Giusti +52
The ratio of the transverse and longitudinal component of polarization transfer to protons in the quasi-elastic reaction, $P^{\prime}_x/P^{\prime}…
Non-forward radiative corrections to electron-carbon scattering
M. Mihovilovič, A. B. Weber, P. Achenbach +37
Radiative corrections to elastic scattering represent an important part of the interpretation of electron-induced nuclear reactions at small energy transfers, where they make for a…
Measurement of the α-particle monopole transition form factor challenges theory: a low-energy puzzle for nuclear forces?
S. Kegel, P. Achenbach, S. Bacca +30
We perform a systematic study of the -particle excitation from its ground state to the resonance. The so-called monopole transition form factor is investigated v…
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…
Measurements of the induced polarization in the quasi-elastic process in non-coplanar kinematics
Sebouh J. Paul, Tim Kolar, Tilen Brecelj +44
We report measurements of the induced polarization of protons knocked out from H and C via the reaction. We have studied the dependence of $\v…
Measurement of the Generalized Polarizabilities of the Proton at Intermediate
H. Fonvieille, J. Beričič, L. Correa +35
Background: Generalized polarizabilities (GPs) are important observables to describe the nucleon structure, and measurements of these observables are still scarce. Purpose: This pa…
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}(\…
Study of the variable broadband emission of Markarian 501 during the most extreme Swift X-ray activity
MAGIC Collaboration, V. A. Acciari, S. Ansoldi +185
Mrk501 is a very high-energy (VHE) gamma-ray blazar located at z=0.034. During a period of two weeks in July 2014, the highest X-ray activity of Mrk501 was observed in ~14 years of…
New Insight in the -Dependence of Proton Generalized Polarizabilities
J. Beričič, L. Correa, M. Benali +35
Virtual Compton scattering on the proton has been investigated at three yet unexplored values of the four-momentum transfer : 0.10, 0.20 and 0.45 GeV, at the Mainz Microtr…
The proton charge radius extracted from the Initial State Radiation experiment at MAMI
Miha Mihovilovič, Patrick Achenbach, Tobias Beranek +32
We report on a comprehensive reinterpretation of the existing cross-section data for elastic electron-proton scattering obtained by the initial-state radiation technique, resulting…
Quasi-elastic polarization-transfer measurements on the deuteron in anti-parallel kinematics
Sebouh J. Paul, David Izraeli, Tilen Brecelj +41
We present measurements of the polarization-transfer components in the H reaction, covering a previously unexplored kinematic region with large positive (ant…
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…
The extreme HBL behaviour of Markarian 501 during 2012
M. L. Ahnen, S. Ansoldi, L. A. Antonelli +276
A multiwavelength campaign was organized to take place between March and July of 2012. Excellent temporal coverage was obtained with more than 25 instruments, including the MAGIC,…
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…
Vertical Beam Polarization at MAMI
B. S. Schlimme, P. Achenbach, K. Aulenbacher +35
For the first time a vertically polarized electron beam has been used for physics experiments at MAMI in the energy range between 180 and 855 MeV. The beam-normal single-spin asymm…
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…
High Precision Momentum Calibration of the Magnetic Spectrometers at MAMI for Hypernuclear Binding Energy Determination
A. Margaryan, J. R. M. Annand, P. Achenbach +8
We propose a new method for absolute momentum calibration of magnetic spectrometers used in nuclear physics, using the time-of-flight (TOF), differences of pairs of particles with…
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…
Search for light massive gauge bosons as an explanation of the anomaly at MAMI
H. Merkel, P. Achenbach, C. Ayerbe Gayoso +33
A massive, but light abelian U(1) gauge boson is a well motivated possible signature of physics beyond the Standard Model of particle physics. In this paper, the search for the sig…