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Measurement of the 40Ar(e,$$\hbox {e}^{\prime }$$) elastic scattering cross section with a novel gas-jet target

https://doi.org/10.1140/epja/s10050-025-01623-4

Littich, M.; Doria, L.; Brand, P.; Achenbach, P.; Aulenbacher, S.; Bacca, S.; Bernauer, J_C; Biroth, M.; Bonaventura, D.; Bosnar, D.; et al (July 2025, The European Physical Journal A)

Abstract We report on a measurement of elastic electron scattering on argon performed with a novel cryogenic gas-jet target at the Mainz Microtron accelerator MAMI. The luminosity is estimated with the thermodynamical parameters of the target and by comparison to a calculation in distorted-wave Born approximation. The cross section, measured at new momentum transfers of 1.24 $$\hbox {fm}^{-1}$$ ${fm}^{- 1}$ and 1.55 $$\hbox {fm}^{-1}$$ ${fm}^{- 1}$ is in agreement with previous experiments performed with a traditional high-pressure gas target, as well as with modernab-initiocalculations employing state-of-the-art nuclear forces from chiral effective field theory. The nearly background-free measurement highlights the optimal properties of the gas-jet target for elements heavier than hydrogen, enabling new applications in hadron and nuclear physics.
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Nuclear density dependence of polarization transfer in quasi-elastic $A (\vec{e}, e^{'} \vec{p})$ reactions

https://doi.org/10.1103/PhysRevC.110.L061302

Kolar, T; Cosyn, W; Giusti, C; Achenbach, P; Ashkenazi, A; Böhm, R; Bosnar, D; Brecelj, T; Christmann, M; Cohen, E O; et al (December 2024, Physical Review C)

Free, publicly-accessible full text available December 1, 2025
Measurement of polarization transfer in the quasi-elastic ${}^{40}{Ca} (\vec{e}, e^{'} \vec{p})$ process

https://doi.org/10.1016/j.physletb.2023.138309

Kolar, T; Achenbach, P; Christmann, M; Distler, MO; Doria, L; Eckert, P; Esser, A; Giusti, C; Geimer, J; Gülker, P; et al (December 2023, Physics Letters B)

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Low- $Q^{2}$ elastic electron-proton scattering using a gas jet target

https://doi.org/10.1103/PhysRevC.106.044610

Wang, Y.; Bernauer, J. C.; Schlimme, B. S.; Achenbach, P.; Aulenbacher, S.; Ball, M.; Biroth, M.; Bonaventura, D.; Bosnar, D.; Brand, P.; et al (October 2022, Physical Review C)

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Measurements of the electron-helicity asymmetry in the quasi-elastic $A (\vec{e}, e^{'} p)$ process

https://doi.org/10.1016/j.physletb.2021.136798

Kolar, T.; Paul, S.J.; Achenbach, P.; Arenhövel, H.; Ashkenazi, A.; Beričič, J.; Böhm, R.; Bosnar, D.; Brecelj, T.; Cline, E.; et al (January 2022, Physics Letters B)

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Operation and characterization of a windowless gas jet target in high-intensity electron beams

https://doi.org/10.1016/j.nima.2021.165668

Schlimme, B.S.; Aulenbacher, S.; Brand, P.; Littich, M.; Wang, Y.; Achenbach, P.; Ball, M.; Bernauer, J.C.; Biroth, M.; Bonaventura, D.; et al (October 2021, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment)

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Measurements of the induced polarization in the quasi-elastic $A (e, e^{'} \vec{p})$ process in non-coplanar kinematics

https://doi.org/10.1016/j.physletb.2020.135984

Paul, S.J.; Kolar, T.; Brecelj, T.; Achenbach, P.; Arenhövel, H.; Ashkenazi, A.; Beričič, J.; Böhm, R.; Bosnar, D.; Cline, E.; et al (December 2020, Physics Letters B)
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Detector response of Cherenkov radiators for calorimetry in the energy range below 14 MeV

https://doi.org/10.1016/j.nima.2020.163665

Christmann, M.; Burger, P.F.; Achenbach, P.; Aulenbacher, S.; Ball, M.; Baunack, S.; Bernauer, J.C.; Biroth, M.; Brand, P.; Caiazza, S.; et al (April 2020, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment)

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Proton spin structure and generalized polarizabilities in the strong quantum chromodynamics regime

https://doi.org/10.1038/s41567-022-01781-y

Ruth, D.; Zielinski, R.; Gu, C.; Allada, M.; Badman, T.; Huang, M.; Liu, J.; Zhu, P.; Allada, K.; Zhang, J.; et al (December 2022, Nature Physics)

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New Insight in the $Q^{2}$ Dependence of Proton Generalized Polarizabilities

https://doi.org/10.1103/PhysRevLett.123.192302

Beričič, J.; Correa, L.; Benali, M.; Achenbach, P.; Ayerbe Gayoso, C.; Bernauer, J. C.; Blomberg, A.; Böhm, R.; Bosnar, D.; Debenjak, L.; et al (November 2019, Physical Review Letters)
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