J. Ahrens

Physics and Astronomy · Physical Sciences

59h-index10.8kcitations239works0.02yr avg
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Research Topics

Nuclear physics research studies(100), Quantum Chromodynamics and Particle Interactions(94), Particle physics theoretical and experimental studies(79), Nuclear Physics and Applications(55), Astrophysics and Cosmic Phenomena(38)

Publications239 total

Ultrasonographic Assessment of Posterior Shoulder Capsule Thickness in Baseball Pitchers: A Validation Study
Sports Health A Multidisciplinary Approach·2025Open Access
First measurement of helicity-dependent cross sections in π0η photoproduction from quasi-free nucleons
Physics Letters B·2018· 9 citedOpen Access
Photoproduction of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math> mesons off protons and neutrons in the second and third nucleon resonance regions
Physical review. C·2018· 12 citedOpen Access
High-statistics measurement of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>η</mml:mi><mml:mo>→</mml:mo><mml:mn>3</mml:mn><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:mrow></mml:math> decay at the Mainz Microtron
Physical review. C·2018· 17 citedOpen Access
Experimental study of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>γ</mml:mi><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mi>η</mml:mi><mml:mi>p</mml:mi></mml:mrow></mml:math> reaction with the A2 setup at the Mainz Microtron
Physical review. C·2018· 21 citedOpen Access
Determination of the scalar polarizabilities of the proton using beam asymmetry $\Sigma_{3}$ Σ 3 in Compton scattering
The European Physical Journal A·2017· 22 citedOpen Access
Photoproduction of $\eta$ $\pi$ pairs off nucleons and deuterons
The European Physical Journal A·2016· 20 citedOpen Access
Photoproduction of $ \pi^{0}$ -pairs off protons and off neutrons
The European Physical Journal A·2015· 22 citedOpen Access
Photoproduction of $π^0$-pairs off protons and off neutrons
arXiv (Cornell University)·2015Open Access
The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region
Physics Letters B·2015· 18 citedOpen Access
Measurements of Double-Polarized Compton Scattering Asymmetries and Extraction of the Proton Spin Polarizabilities
Physical Review Letters·2015· 42 citedOpen Access
Helicity dependence of the γ 3He → πX reactions in the Δ(1232) resonance region
The European Physical Journal A·2014· 7 cited
Measurements of the Proton Spin Polarizabilities with Double-Polarized Compton Scattering
arXiv (Cornell University)·2014Open Access
Quasifree photoproduction of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>η</mml:mi></mml:math>mesons off protons and neutrons
Physical Review C·2014· 59 citedOpen Access
Neutron Skin of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Pb</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>208</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>from Coherent Pion Photoproduction
Physical Review Letters·2014· 221 citedOpen Access
Photoproduction of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>Mesons off Neutrons in the Nucleon Resonance Region
Physical Review Letters·2014· 28 citedOpen Access
Determination of the $ \eta$ mass with the Crystal Ball at MAMI-B
The European Physical Journal A·2014· 7 cited
Measurement of the beam-helicity asymmetry I⊙ in the photoproduction of $ \pi^{0}$ $ \pi^{\pm}$ pairs off protons and off neutrons
The European Physical Journal A·2014· 22 citedOpen Access
Narrow Structure in the Excitation Function of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>η</mml:mi></mml:math>Photoproduction off the Neutron
Physical Review Letters·2013· 49 citedOpen Access
Quasi-free photoproduction of η-mesons off 3He nuclei
The European Physical Journal A·2013· 29 citedOpen Access
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Frequent Co-authors

R. Beck(27), B. Krusche(17), V. Metag(17), K. Helbing(16), J. C. McGeorge(16), T. Becka(15), O. Botner(15), D. Chirkin(15), P. Desiati(15), T. DeYoung(15), A. Goldschmidt(15), A. Hallgren(15), F. Halzen(15), X. Bai(14), Daniel Bertrand(14), C. De Clercq(14), K. Hanson(14), G. C. Hill(14), S. Hundertmark(14), R. Hardtke(14)