173 citations · 527 across the 39 of their papers we have counts for
18 papers · 1 filter
High-precision measurement of the kaonic hydrogen 1s level shift and width with SIDDHARTA-2
M. Bazzi, F. Clozza, C. Guaraldo +37
Kaonic atoms provide a unique experimental probe of strong interaction in the low-energy regime. In particular, the strong-interaction-induced shift () and…
High precision X-ray spectroscopy of kaonic neon
F Sgaramella, D Sirghi, K Toho +41
The high-precision kaonic neon X-ray transitions measurement performed by the SIDDHARTA-2 collaboration at the DANE collider is reported. Both the X-ray energies and yields for…
Intermediate Mass Kaonic Atoms at DANE
Francesco Artibani, Francesco Clozza, Massimiliano Bazzi +36
The SIDDHARTA-2 collaboration aims to measure for the first time the shift and width induced on the level of kaonic deuterium by the strong interaction. In the preliminary pha…
First measurement of kaonic helium-4 M-series transitions
F Sgaramella, D Sirghi, L Abbene +40
In this paper we present the results of a new kaonic helium-4 measurement with a 1.37 g/l gaseous target by the SIDDHARTA-2 experiment at the DAΦNE collider. We measured, for the f…
The Two-Photon Exchange Experiment at DESY
R. Alarcon, R. Beck, J. C. Bernauer +36
We propose a new measurement of the ratio of positron-proton to electron-proton elastic scattering at DESY. The purpose is to determine the contributions beyond single-photon excha…
Measurements of high-n transitions in intermediate mass kaonic atoms by SIDDHARTA-2 at DANE
F. Sgaramella, M. Tüchler, C. Amsler +38
The SIDDHARTA-2 experiment installed at the DANE collider of INFN-LNF performed, for the first time, measurements of high-n transitions in intermediate mass kaonic atoms…
Exclusive J/ Detection and Physics with ECCE
X. Li, J. K. Adkins, Y. Akiba +276
Exclusive heavy quarkonium photoproduction is one of the most popular processes in EIC, which has a large cross section and a simple final state. Due to the gluonic nature of the e…
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…
Neutron Spin Structure from e-3He Scattering with Double Spectator Tagging at the Electron-Ion Collider
Ivica Friscic, Dien Nguyen, Jackson Pybus +9
The spin structure function of the neutron is traditionally determined by measuring the spin asymmetry of inclusive electron deep inelastic scattering (DIS) off polarized3He nuclei…
A New Approach to Determine Radiative Capture Reaction Rates at Astrophysical Energies
I. Friščić, T. W. Donnelly, R. G. Milner
Radiative capture reactions play a crucial role in stellar nucleosynthesis but have proved challenging to determine experimentally. In particular, the large uncertainty (100%…
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…
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…
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…
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…
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…