433 citations · 7.1k across the 185 of their papers we have counts for
75 papers · 1 filter
Response to the He interpretation of MAMI's recent determination of H)
Ryoko Kino, Patrick Achenbach, Pascal Klag +5
We respond to the recent suggestion by A. Gal [arXiv:2604.18259] that the sharp pion-momentum peak at ~MeV/ observed in our $^7\mathrm{Li}(e,e^\prime K^+)…
Precise measurement of the -binding energy difference between H and H via decay-pion spectroscopy at MAMI
Ryoko Kino, Sho Nagao, Patrick Achenbach +31
We performed high-precision decay-pion spectroscopy of light hypernuclei at the Mainz Microtron (MAMI) using the A1 spectrometer facility. By measuring the monochromatic …
Beam-Normal Single-Spin Asymmetry in Pb at low energy: discrepancy resolved or new kinematic puzzle?
A. Esser, N. Kozyrev, K. Aulenbacher +17
A longstanding discrepancy between measured and predicted beam-normal single-spin asymmetries in elastic electron scattering off Pb has challenged our understanding…
Measurement of the helicity-dependent response in quasi-elastic proton knockout from
Tim Kolar, Iris Sabo-Napadensky, Patrick Achenbach +34
The role of the electron-helicity-dependent cross-section term and the structure function in the quasi-elastic process was studied. The…
Measurement of ground state energy in an electron scattering experiment at MAMI-A1
Tianhao Shao, Jinhui Chen, Josef Pochodzalla +28
For the first time the neutron-rich hydrogen isotope was produced in an electron scattering experiment in the reaction using the spectrom…
Measurement of the cross sections at
M. Mihovilovič, L. Doria, P. Achenbach +22
We present the findings of a study based on a new inelastic electron-scattering experiment on the nucleus focusing on the kinematic region of $Q^2=0.8\,\mathrm{…
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}…
Exploring the neutron skin by hyperon-antihyperon production in antiproton-nucleus interactions
Martin Christiansen, Falk Schupp, Patrick Achenbach +3
In this work we propose a new method to measure the evolution of the neutron skin thickness between different isotopes. We consider antiproton-nucleus interactions close to the pro…
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…
First observation of a nuclear -state of hypernucleus,
M. Yoshimoto, J. K. Ahn, B. Bassalleck +46
Bound-systems of -- are studied via capture at rest followed by emission of a twin single- hypernucleus in the emulsion detectors. Two events forming…
Spectroscopy of hyperlithium by the reaction
T. Gogami, C. Chen, D. Kawama +84
Missing mass spectroscopy with the reaction was performed at Jefferson Laboratory's Hall C for the neutron rich hypernucleus . The ground…
Observation of Coulomb-assisted nuclear bound state of -N system
S. H. Hayakawa, K. Agari, J. K. Ahn +95
In an emulsion-counter hybrid experiment performed at J-PARC, a absorption event was observed which decayed into twin single- hypernuclei. Kinematic calculations enabled a…
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…
Comparison of recoil polarization in the process for protons extracted from and shell
T. Kolar, S. Paul, T. Brecelj +29
We present first measurements of the double ratio of the polarization transfer components f…
Beam-Normal Single Spin Asymmetry in Elastic Electron Scattering off Si and Zr
A. Esser, M. Thiel, P. Achenbach +30
We report on a new measurement of the beam-normal single spin asymmetry in the elastic scattering of 570 MeV transversely polarized electrons off Si and $^{…
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…
Decay pion spectroscopy: a new approach
A. Margaryan, R. Ajvazyan, N. Grigoryan +12
We propose a new experiment for decay pion spectroscopy of light hypernuclei at electron- and proton-beam facilities, using the recoil distance technique for separation of produced…
Has the neutral double hypernucleus n been observed?
Sebastian Bleser, Michael Bölting, Theodoros Gaitanos +3
The BNL-AGS E906 experiment was the first fully electronic experiment to produce and study double hypernuclei with large statistics. Two dominant structures were observed in the co…
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…