P. Achenbach

activity

20232026

most citedMeasurement of the near-threshold J

/ ψ

photoproduction cross section with the CLAS12 experiment

3 citations · 6 across the 18 of their papers we have counts for

collaborators

20 papers

nucl-ex2026

Measurements of $γ_{v} p \to π^{+} π^{-} p^{'}$ Cross Sections with the CLAS12 Detector for $Q^{2}$ from 2.4-8.0 GeV $^{2}$ and $W$ from 1.4-2.1 GeV

K. Neupane, R. W. Gothe, D. S. Carman +145

This paper reports exclusive cross sections for the $e p \to e^{'} π^{+} π^{-} p^{'}$ reaction using the CLAS12 detector at Jefferson Laboratory. The extractions of fully integrated and nine sin…

nucl-ex2026

First Measurement of Near-Threshold J/ψ Photoproduction on the Neutron

R. Tyson, D. G. Ireland, B. McKinnon +139

We report the first measurement of the total and t-differential cross sections for near-threshold J/ $ψ$ photoproduction on the neutron, obtained with the CLAS12 detector at the Tho…

nucl-ex2026

Multi-Differential DVCS Cross Section Measurement on the Proton in the Valence Region with CLAS12

S. Lee, T. B. Hayward, L. Elouadrhiri +138

We report the measurement of the four-fold differential cross section of deeply virtual Compton scattering (DVCS) on the proton using a longitudinally polarized 10.6 GeV CEBAF elec…

nucl-ex2026

Measurements of $γ_{v} p \to π^{+} π^{-} p^{'}$ Cross Sections with the CLAS Detector for $Q^{2}$ from 2.0--5.0~GeV $^{2}$ and $W$ from 1.400--2.125~GeV

A. Trivedi, R. W. Gothe, E. Phelps +155

Observables in the electroproduction of the $π^{+} π^{-} p$ reaction channel off the proton that are sensitive to the polarization of the virtual photon are presented for the first time…

hep-ex2026

Electro- and photoproduction of muon pairs with $μ$ CLAS12: Double Deeply Virtual Compton Scattering, Timelike Compton Scattering, and $J / ψ$ production

J. S. Alvarado, N. Baltzell, M. Bondi +98

The CEBAF Large Acceptance Spectrometer for operation at 12 GeV (CLAS12) at the Thomas Jefferson National Accelerator Facility has played a central role in advancing the understand…

nucl-ex2026

Response to the $_{Λ}^{7}$ He interpretation of MAMI's recent determination of $B_{Λ} (_{Λ}^{3}$ 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 $p_{π^{-}} \approx 113.8$ ~MeV/ $c$ observed in our $^7\mathrm{Li}(e,e^\prime K^+)…

nucl-ex2026

Measurement of the Gerasimov-Drell-Hearn integrand for proton and deuteron from 200 to 1400 MeV

P. Pedroni, F. Afzal, S. Abt +59

New data for the total inclusive helicity-dependent cross section for the proton and deuteron were obtained in the photon energy interval 200-1400 MeV. The experiment was performed…

hep-ex2026

Measurements of Beam Spin Asymmetries of $π^{\pm} π^{0}$ dihadrons at CLAS12

A. G. Acar, P. Achenbach, J. S. Alvarado +131

A first measurement of beam spin asymmetries for $π^{+} π^{0}$ and $π^{-} π^{0}$ pairs in semi-inclusive deep inelastic scattering is reported. The asymmetries in the dihadron angular distri…

hep-ex2026★ 3 cited

Measurement of the near-threshold J $/ ψ$ photoproduction cross section with the CLAS12 experiment

P. Chatagnon, V. Kubarovsky, R. Paremuzyan +147

We present measurements of the total and differential cross sections for near-threshold J/ $ψ$ photoproduction obtained with the CLAS12 detector at the Thomas Jefferson National Acc…

nucl-ex2026

Frascati 22 GeV Workshop Summary

A. Accardi, P. Achenbach, A. Afanasev +103

This document summarizes the outcomes of the "Science at the Luminosity Frontier: Jefferson Lab at 22 GeV" workshop, held at the INFN Laboratori Nazionali di Frascati in December 2…

hep-ex2025

Hadron Physics Opportunities at FAIR

J. G. Messchendorp, F. Nerling, P. Achenbach +103

This White Paper outlines a coordinated, decade-spanning programme of hadron and QCD studies anchored at the GSI/FAIR accelerator complex. Profiting from intense deuteron, proton a…

hep-ex2025

New high-statistics measurement of the $π^{0} \to e^{+} e^{-} γ$ Dalitz decay at the Mainz Microtron

S. Prakhov, L. Heijkenskjöld, S. Abt +69

The Dalitz decay $π^{0} \to e^{+} e^{-} γ$ has been measured with the highest statistical accuracy obtained so far in the $γ p \to π^{0} p$ reaction with the A2 tagged-photon facility at the M…

nucl-ex2025

Measurement of Beam-Recoil Observables $C_{x}$ and $C_{z}$ for $K^{+} Λ$ Photoproduction

CLAS Collaboration, S. Adhikari, B. A. Raue +154

Exclusive photoproduction of $K^{+} Λ$ final states off a proton target has been an important component in the search for missing nucleon resonances and our understanding of the prod…

hep-ex2025★ 2 cited

Proton Transparency and Neutrino Physics: New Methods and Modeling

S. Dytman, M. Betancourt, N. Steinberg +139

Extracting accurate results from neutrino oscillation and cross section experiments requires accurate simulation of the neutrino-nucleus interaction. The rescattering of outgoing h…

nucl-ex2025

Recoil Polarization in $K^{+} Y$ Electroproduction in the Nucleon Resonance Region with CLAS12

D. S. Carman, A. D'Angelo, L. Lanza +127

Hyperon recoil polarization measurements for the exclusive electroproduction of $K^{+} Λ$ and $K^{+} Σ^{0}$ final states from an unpolarized proton target have been carried out using the C…

nucl-ex2025

Measurement of single- and double-polarization observables in the photoproduction of $π^{+} π^{-}$ ~meson pairs off the proton using CLAS at Jefferson Laboratory

P. Roy, S. Cao, V. Crede +141

The photoproduction of $π^{+} π^{-}$ meson pairs off the proton has been studied in the reaction $γ p \to p π^{+} π^{-}$ using the CEBAF Large Acceptance Spectrometer (CLAS) and the frozen-sp…

hep-ex2025★ 1 cited

Multidimensional Measurements of Beam Single Spin Asymmetries in Semi-inclusive Deep-inelastic Charged Kaon Electroproduction off Protons in the Valence Region

A. Kripko, S. Diehl, K. Joo +136

Measurements of beam single spin asymmetries in semi-inclusive deep inelastic electron scattering (SIDIS) with positively charged kaons off protons have been performed with 10.6 an…

nucl-th2025

Decays of $N^{}$ and $Δ^{}$ resonances into $N ρ$ , $Δ π$ , and $N σ$

A. V. Sarantsev, E. Klempt, K. V. Nikonov +7

The decays of $N^{*}$ and $Δ^{*}$ resonances into $N ρ$ , $Δ π$ and $N σ$ final states are studied in a coupled-channel analysis of data on pion- and photo-induced reactions. Improvements…

nucl-ex2024

Dihadron Azimuthal Correlations in Deep-Inelastic Scattering Off Nuclear Targets

CLAS Collaboration

We measured the nuclear dependence of the di-pion azimuthal correlation function in deep-inelastic scattering (DIS) using the CEBAF Large Acceptance Spectrometer (CLAS) and a 5 GeV…

nucl-ex2023

Double-pion electroproduction off protons in deuterium: Quasifree cross sections and final-state interactions

Iu. A. Skorodumina, G. V. Fedotov, R. W. Gothe +1

The single-differential and fully integrated cross sections for quasifree $π^{+} π^{-}$ electroproduction off protons bound in deuterium have been extracted for the first time. The…

Measurements of γv​p→π+π−p′ Cross Sections with the CLAS12 Detector for Q2 from 2.4-8.0 GeV2 and W from 1.4-2.1 GeV

First Measurement of Near-Threshold J/ψ Photoproduction on the Neutron

Multi-Differential DVCS Cross Section Measurement on the Proton in the Valence Region with CLAS12

Measurements of γv​p→π+π−p′ Cross Sections with the CLAS Detector for Q2 from 2.0--5.0~GeV2 and W from 1.400--2.125~GeV

Electro- and photoproduction of muon pairs with μCLAS12: Double Deeply Virtual Compton Scattering, Timelike Compton Scattering, and J/ψ production

Response to the Λ7​He interpretation of MAMI's recent determination of BΛ​(Λ3​H)

Measurement of the Gerasimov-Drell-Hearn integrand for proton and deuteron from 200 to 1400 MeV

Measurements of Beam Spin Asymmetries of π±π0 dihadrons at CLAS12

Measurement of the near-threshold J/ψ photoproduction cross section with the CLAS12 experiment

Frascati 22 GeV Workshop Summary

Hadron Physics Opportunities at FAIR

New high-statistics measurement of the π0→e+e−γ Dalitz decay at the Mainz Microtron

Measurement of Beam-Recoil Observables Cx​ and Cz​ for K+Λ Photoproduction

Proton Transparency and Neutrino Physics: New Methods and Modeling

Recoil Polarization in K+Y Electroproduction in the Nucleon Resonance Region with CLAS12

Measurement of single- and double-polarization observables in the photoproduction of π+π−~meson pairs off the proton using CLAS at Jefferson Laboratory

Multidimensional Measurements of Beam Single Spin Asymmetries in Semi-inclusive Deep-inelastic Charged Kaon Electroproduction off Protons in the Valence Region

Decays of N∗ and Δ∗ resonances into Nρ, Δπ, and Nσ

Dihadron Azimuthal Correlations in Deep-Inelastic Scattering Off Nuclear Targets

Double-pion electroproduction off protons in deuterium: Quasifree cross sections and final-state interactions

Measurements of $γ_{v} p \to π^{+} π^{-} p^{'}$ Cross Sections with the CLAS12 Detector for $Q^{2}$ from 2.4-8.0 GeV $^{2}$ and $W$ from 1.4-2.1 GeV

Measurements of $γ_{v} p \to π^{+} π^{-} p^{'}$ Cross Sections with the CLAS Detector for $Q^{2}$ from 2.0--5.0~GeV $^{2}$ and $W$ from 1.400--2.125~GeV

Electro- and photoproduction of muon pairs with $μ$ CLAS12: Double Deeply Virtual Compton Scattering, Timelike Compton Scattering, and $J / ψ$ production

Response to the $_{Λ}^{7}$ He interpretation of MAMI's recent determination of $B_{Λ} (_{Λ}^{3}$ H)

Measurements of Beam Spin Asymmetries of $π^{\pm} π^{0}$ dihadrons at CLAS12

Measurement of the near-threshold J $/ ψ$ photoproduction cross section with the CLAS12 experiment

New high-statistics measurement of the $π^{0} \to e^{+} e^{-} γ$ Dalitz decay at the Mainz Microtron

Measurement of Beam-Recoil Observables $C_{x}$ and $C_{z}$ for $K^{+} Λ$ Photoproduction

Recoil Polarization in $K^{+} Y$ Electroproduction in the Nucleon Resonance Region with CLAS12

Measurement of single- and double-polarization observables in the photoproduction of $π^{+} π^{-}$ ~meson pairs off the proton using CLAS at Jefferson Laboratory

Decays of $N^{}$ and $Δ^{}$ resonances into $N ρ$ , $Δ π$ , and $N σ$