K. Neupane

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…

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…

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…

First measurement of polarized spin-density matrix elements and differential cross sections d $σ$ /d $t$ in $ω$ ~photoproduction off the proton for $2.7 < E_{γ} < 5.2$ GeV using CLAS at Jefferson Lab

T. Hu, Z. Akbar, V. Crede +147

We report on the differential cross sections d $σ$ /d $t$ , the unpolarized spin-density matrix elements $ρ_{00}^{0}$ , $ρ_{1 - 1}^{0}$ , Re\, $ρ_{10}^{0}$ , and the first extraction of the polari…

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

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…

First Study of the Nuclear Response to Fast Hadrons via Angular Correlations between Pions and Slow Protons in Electron-Nucleus Scattering

S. J. Paul, M. Arratia, H. Hakobyan +127

We report on the first measurement of angular correlations between high-energy pions and slow protons in electron-nucleus ( $e A$ ) scattering, providing a new probe of how a nucleus…

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…

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…

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…

hep-ex2025

Inclusive Electron Scattering in the Resonance Region off a Hydrogen Target with CLAS12

V. Klimenko, D. S. Carman, R. W. Gothe +135

Inclusive electron scattering cross sections off a hydrogen target at a beam energy of 10.6 GeV have been measured with data collected from the CLAS12 spectrometer at Jefferson Lab…

nucl-ex2024

Photoproduction of two charged pions off protons in the resonance region

A. V. Sarantsev, E. Klempt, K. V. Nikonov +4

Photoproduction of charged pions pairs off protons is studied within the invariant masses of the final state hadrons from 1.6 to 2.4 GeV at the Thomas Jefferson National Accelerato…

nucl-ex2024★ 2 cited

Measurement of the nucleon spin structure functions for 0.01< $Q^{2}$ <1 GeV $^{2}$ using CLAS

A. Deur, S. E. Kuhn, M. Ripani +147

The spin structure functions of the proton and the deuteron were measured during the EG4 experiment at Jefferson Lab in 2006. Data were collected for longitudinally polarized elect…

hep-ex2024

First Measurement of Deeply Virtual Compton Scattering on the Neutron with Detection of the Active Neutron

CLAS Collaboration, A. Hobart, S. Niccolai +146

Measuring Deeply Virtual Compton Scattering on the neutron is one of the necessary steps to understand the structure of the nucleon in terms of Generalized Parton Distributions (GP…

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…

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…

Beam Spin Asymmetry Measurements of Deeply Virtual $π^{0}$ Production with CLAS12

A. Kim, S. Diehl, K. Joo +154

The new experimental measurements of beam spin asymmetry were performed for the deeply virtual exclusive $π^{0}$ production in a wide kinematic region with the photon virtualities $Q…

First Results on Nucleon Resonance Electroexcitation Amplitudes from $e p \to e^{'} π^{+} π^{-} p^{'}$ Cross Sections at $W$ from 1.4-1.7 GeV and $Q^{2}$ from 2.0-5.0 GeV $^{2}$

V. I. Mokeev, P. Achenbach, V. D. Burkert +7

The electroexcitation amplitudes or $γ_{v} p N^{*}$ electrocouplings of the $N (1440) 1/ 2^{+}$ , $N (1520) 3/ 2^{-}$ , and $Δ (1600) 3/ 2^{+}$ resonances were obtained for the first time from the $ep \t…

nucl-ex2023★ 19 cited

Strong Interaction Physics at the Luminosity Frontier with 22 GeV Electrons at Jefferson Lab

A. Accardi, P. Achenbach, D. Adhikari +441

This document presents the initial scientific case for upgrading the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab (JLab) to 22 GeV. It is the result of a…