J. Ritman

activity

19952026

most citedThe High-Acceptance Dielectron Spectrometer HADES

339 citations · 5k across the 194 of their papers we have counts for

collaborators

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128 papers · 1 filter

nucl-ex2026

$π$ -QCD; Proposal for Experiments at the GSI Pion Beam Facility

HADES Collaboration, R. Abou Yassine, J. Adamczewski-Musch +127

We propose to investigate the dynamics of hadronic matter in the strong QCD regime using the pion-beam facility at GSI in conjunction with HADES. This program will study hadron phy…

nucl-ex2026

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…

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…

nucl-ex2025

Three-Nucleon Dynamics in the dp breakup collisions at 190 MeV/nucleon using the WASA detector at COSY-Jülich

P. Adlarson, W. Augustyniak, W. Bardan +87

The differential cross section for the $^{1}$ H $(d, pp) n$ breakup reaction at deuteron beam energy of 380 MeV has been determined with high precision for 189 angular configurations o…

nucl-ex2025

Formation and lifetime measurements of light hypernuclei in Ag+Ag collisions at $s_{NN}$ = 2.55 GeV

R. Abou Yassine, J. Adamczewski-Musch, C. Asal +111

We present the first observation of $_{Λ}^{3} H$ and $_{Λ}^{4} H$ in Ag+Ag collisions at $s_{NN}$ = 2.55 GeV, emitted around mid-rapidity. The hypernucl…

nucl-ex2025

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…

nucl-ex2025

Hyperon-Production Studies in $p + p \to Λ + K_{S}^{0} + p + π^{+}$ with HADES

Snehankit Pattnaik, Johan Messchendorp, James Ritman

The production mechanism of hyperons in the proton-proton collisions is explored using exclusive process with the data sample collected by HADES. The clear sign for three intermedi…

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 the Total Compton Scattering Cross Section between 6.5 and 11 GeV

GlueX Collaboration, F. Afzal, C. S. Akondi +148

The total cross section for Compton scattering off atomic electrons, $γ + e \to γ^{'} + e^{'}$ , was measured using photons with energies between 6.5 and 11.1 GeV incident on a $^{9}$ Be t…

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…

nucl-ex2025

First Measurement of $a_{2}^{0} (1320)$ Polarized Photoproduction Cross Section

GlueX Collaboration, F. Afzal, C. S. Akondi +149

We measure for the first time the differential photoproduction cross section $d σ / d t$ of the $a_{2} (1320)$ meson at an average photon beam energy of 8.5~GeV, using data with an integr…

nucl-ex2024★ 5 cited

First Measurement of Near- and Sub-Threshold $J / ψ$ Photoproduction off Nuclei

J. R. Pybus, L. Ehinger, T. Kolar +65

We report on the first measurement of $J / ψ$ photoproduction from nuclei in the photon energy range of $7$ to $10.8$ GeV, extending above and below the photoproduction threshold in…

nucl-ex2024

Measurement of Spin-Density Matrix Elements in $Δ^{++} (1232)$ photoproduction

F. Afzal, C. S. Akondi, M. Albrecht +146

We measure the spin-density matrix elements (SDMEs) of the $Δ^{++} (1232)$ in the photoproduction reaction $γ p \to π^{-} Δ^{++} (1232)$ with the GlueX experiment in Hall D at Jefferson…

nucl-ex2024★ 6 cited

Upper Limit on the Photoproduction Cross Section of the Spin-Exotic $π_{1} (1600)$

GlueX Collaboration, F. Afzal, C. S. Akondi +147

The spin-exotic hybrid meson $π_{1} (1600)$ is predicted to have a large decay rate to the $ω π π$ final state. Using 76.6~pb $^{- 1}$ of data collected with the GlueX detector, we meas…

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…

nucl-ex2023

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…

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…

nucl-ex2023

Measurement of the helicity asymmetry $E$ for the $γ p \to p π^{0}$ reaction in the resonance region

K. Chan, N. Zachariou, M. Bashkanov +9

The double-spin-polarization observable $E$ for $γ p \to p π^{0}$ has been measured with the CEBAF Large Acceptance Spectrometer (CLAS) at photon beam energies $E_{γ}$ …

nucl-ex2023★ 16 cited

Measurement of Spin-Density Matrix Elements in $ρ (770)$ Production with a Linearly Polarized Photon Beam at $E_{γ} = 8.2 - 8.8 GeV$

GlueX Collaboration, S. Adhikari, F. Afzal +150

The GlueX experiment at Jefferson Lab studies photoproduction of mesons using linearly polarized $8.5 GeV$ photons impinging on a hydrogen target which is contained within…

nucl-ex2023★ 69 cited

Measurement of the J/ $ψ$ photoproduction cross section over the full near-threshold kinematic region

GlueX Collaboration, S. Adhikari, F. Afzal +150

We report the total and differential cross sections for $J / ψ$ photoproduction with the large acceptance GlueX spectrometer for photon beam energies from the threshold at 8.2~GeV up…

nucl-ex2023

Investigation of the $Σ^{0}$ Production Mechanism in p(3.5 GeV)+p Collisions

R. Abou Yassine, O. Arnold, M. Becker +88

The production of $Σ^{0}$ hyperons in proton proton collisions at a beam kinetic energy of 3.5 GeV impinging on a liquid hydrogen target was investigated using data collected with th…

nucl-ex2022

First Measurement of $Λ$ Electroproduction off Nuclei in the Current and Target Fragmentation Regions

T. Chetry, L. El Fassi, W. K. Brooks +151

We report results of $Λ$ hyperon production in semi-inclusive deep-inelastic scattering off deuterium, carbon, iron, and lead targets obtained with the CLAS detector and the Contin…

nucl-ex2022★ 57 cited

Measurement of global polarization of Λ hyperons in few-GeV heavy-ion collisions

R. Abou Yassine, J. Adamczewski-Musch, C. Asal +105

The global polarization of Λ hyperons along the total orbital angular momentum of a relativistic heavy-ion collision is presented based on the high statistics data samples collecte…

nucl-ex2022★ 1 cited

Exclusive $π^{-}$ Electroproduction off the Neutron in Deuterium in the Resonance Region

Y. Tian, R. W. Gothe, V. I. Mokeev +140

New results for the exclusive and quasi-free cross sections off neutrons bound in deuterium $γ_{v} n (p) \to p π^{-} (p)$ are presented over a wide final state hadron angle rang…

π-QCD; Proposal for Experiments at the GSI Pion Beam Facility

First measurement of polarized spin-density matrix elements and differential cross sections dσ/dt in ω~photoproduction off the proton for 2.7<Eγ​<5.2 GeV using CLAS at Jefferson Lab

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

Three-Nucleon Dynamics in the dp breakup collisions at 190 MeV/nucleon using the WASA detector at COSY-Jülich

Formation and lifetime measurements of light hypernuclei in Ag+Ag collisions at sNN​​ = 2.55 GeV

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

Hyperon-Production Studies in p+p→Λ+KS0​+p+π+ with HADES

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

Measurement of the Total Compton Scattering Cross Section between 6.5 and 11 GeV

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

First Measurement of a20​(1320) Polarized Photoproduction Cross Section

First Measurement of Near- and Sub-Threshold J/ψ Photoproduction off Nuclei

Measurement of Spin-Density Matrix Elements in Δ++(1232) photoproduction

Upper Limit on the Photoproduction Cross Section of the Spin-Exotic π1​(1600)

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

Beam Spin Asymmetry Measurements of Deeply Virtual π0 Production with CLAS12

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

Measurement of the helicity asymmetry E for the γ​p​→pπ0 reaction in the resonance region

Measurement of Spin-Density Matrix Elements in ρ(770) Production with a Linearly Polarized Photon Beam at Eγ​=8.2−8.8GeV

Measurement of the J/ψ photoproduction cross section over the full near-threshold kinematic region

Investigation of the Σ0 Production Mechanism in p(3.5 GeV)+p Collisions

First Measurement of Λ Electroproduction off Nuclei in the Current and Target Fragmentation Regions

Measurement of global polarization of Λ hyperons in few-GeV heavy-ion collisions

Exclusive π− Electroproduction off the Neutron in Deuterium in the Resonance Region

$π$ -QCD; Proposal for Experiments at the GSI Pion Beam Facility

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

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

Formation and lifetime measurements of light hypernuclei in Ag+Ag collisions at $s_{NN}$ = 2.55 GeV

Hyperon-Production Studies in $p + p \to Λ + K_{S}^{0} + p + π^{+}$ with HADES

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

First Measurement of $a_{2}^{0} (1320)$ Polarized Photoproduction Cross Section

First Measurement of Near- and Sub-Threshold $J / ψ$ Photoproduction off Nuclei

Measurement of Spin-Density Matrix Elements in $Δ^{++} (1232)$ photoproduction

Upper Limit on the Photoproduction Cross Section of the Spin-Exotic $π_{1} (1600)$

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

Measurement of the helicity asymmetry $E$ for the $γ p \to p π^{0}$ reaction in the resonance region

Measurement of Spin-Density Matrix Elements in $ρ (770)$ Production with a Linearly Polarized Photon Beam at $E_{γ} = 8.2 - 8.8 GeV$

Measurement of the J/ $ψ$ photoproduction cross section over the full near-threshold kinematic region

Investigation of the $Σ^{0}$ Production Mechanism in p(3.5 GeV)+p Collisions

First Measurement of $Λ$ Electroproduction off Nuclei in the Current and Target Fragmentation Regions

Exclusive $π^{-}$ Electroproduction off the Neutron in Deuterium in the Resonance Region