A. Fradi

activity

20072021

most citedDifferential cross section and recoil polarization measurements for the gamma p to K+ Lambda reaction using CLAS at Jefferson Lab

165 citations · 2.1k across the 56 of their papers we have counts for

collaborators

Showing nucl-exShow all

42 papers · 1 filter

nucl-ex2021

Beam-spin asymmetry $Σ$ for $Σ^{-}$ hyperon photoproduction off the neutron

Nicholas Zachariou, Edwin Munevar, Barry Berman +8

We report a new measurement of the beam-spin asymmetry $Σ$ for the $γ n \to K^{+} Σ^{-}$ reaction using quasi-free neutrons in a liquid-deuterium target. The new…

nucl-ex2018

First Measurements of the Double-Polarization Observables $F$ , $P$ , and $H$ in $ω$ Photoproduction off Transversely Polarized Protons in the $N^{*}$ Resonance Region

P. Roy, S. Park, V. Crede +145

First measurements of double-polarization observables in $ω$ photoproduction off the proton are presented using transverse target polarization and data from the CEBAF Large Accepta…

nucl-ex2018★ 10 cited

Beam-Target Helicity Asymmetry $E$ in $K^{0} Λ$ and $K^{0} Σ^{0}$ Photoproduction on the Neutron

CLAS Collaboration, D. H. Ho, R. A. Schumacher +146

We report the first measurements of the $E$ beam-target helicity asymmetry for the $γ n \to K^{0} Λ$ , and $K^{0} Σ^{0}$ channels in the energy range 1.70 $\leq W \leq$ 2.34 Ge…

nucl-ex2018★ 4 cited

First Measurement of $Ξ^{-}$ Polarization in Photoproduction

J. Bono, L. Guo., B. Raue

Despite decades of studies of the photoproduction of hyperons, both their production mechanisms and their spectra of excited states are still largely unknown. While the parity-viol…

nucl-ex2017★ 8 cited

Double $K_{S}^{0}$ Photoproduction off the Proton at CLAS

S. Chandavar, J. T. Goetz, K. Hicks +124

The $f_{0}$ (1500) meson resonance is one of several contenders to have significant mixing with the lightest glueball. This resonance is well established from several previous experim…

nucl-ex2017★ 12 cited

Measurement of the beam asymmetry $Σ$ and the target asymmetry $T$ in the photoproduction of $ω$ mesons off the proton using CLAS at Jefferson Laboratory

P. Roy, Z. Akbar, S. Park +143

The photoproduction of $ω$ mesons off the proton has been studied in the reaction $γ p \to p ω$ using the CEBAF Large Acceptance Spectrometer (CLAS) and the frozen-spin target (FROS…

nucl-ex2017★ 14 cited

Semi-Inclusive $π_{0}$ target and beam-target asymmetries from 6 GeV electron scattering with CLAS

S. Jawalkar, S. Koirala, H. Avakian +160

We present precision measurements of the target and beam-target spin asymmetries from neutral pion electroproduction in deep-inelastic scattering (DIS) using the CEBAF Large Accept…

nucl-ex2017★ 26 cited

Measurement of the helicity asymmetry $E$ in $ω \to π^{+} π^{-} π^{0}$ photoproduction

Z. Akbar, P. Roy, S. Park +131

The double-polarization observable $E$ was studied for the reaction $γ p \to p ω$ using the CEBAF Large Acceptance Spectrometer (CLAS) in Hall B at the Thomas Jefferson National Accel…

nucl-ex2017★ 43 cited

First Exclusive Measurement of Deeply Virtual Compton Scattering off $^{4}$ He: Toward the 3D Tomography of Nuclei

M. Hattawy, N. A. Baltzell, R. Dupré +157

We report on the first measurement of the beam-spin asymmetry in the exclusive process of coherent deeply virtual Compton scattering off a nucleus. The experiment used the 6 GeV el…

nucl-ex2017★ 31 cited

Measurement of the Differential and Total Cross Sections of the $γ d \to K^{0} Λ (p)$ Reaction within the Resonance Region

N. Compton, C. E. Taylor, K. Hicks +8

We report the first measurement of differential and total cross sections for the $γ d \to K^{0} Λ (p)$ reaction, using data from the CLAS detector at the Thomas Jefferson National Accel…

nucl-ex2017★ 26 cited

Differential Cross Section Measurements for $γ n \to π^{-} p$ Above the First Nucleon Resonance Region

P. T. Mattione, D. S. Carman, I. I. Strakovsky +145

The quasi-free $γ d \to π^{-} p (p)$ differential cross section has been measured with CLAS at photon beam energies $E_{γ}$ from 0.445 GeV to 2.510 GeV (corresponding to $W$ from 1.311 Ge…

nucl-ex2017

The Beam-Target Helicity Asymmetry for $γ n \to π^{-} p$ in the {\bf{ $N^{*}$ } Resonance Region

D. Ho, P. Peng, C. Bass +140

We report the first beam-target double-polarization asymmetries in the $γ + n (p) \to π^{-} + p (p)$ reaction spanning the nucleon resonance region from invariant mass $W$ = $150…

nucl-ex2016★ 9 cited

Target and beam-target spin asymmetries in exclusive pion electroproduction for $Q^{2} > 1$ GeV $^{2}$ . II. $e p \to e π^{0} p$

P. E. Bosted, A. Kim, K. P. Adhikari +152

Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive $π^{0}$ electroproduction reaction $γ^{*} p \to p π^{0}$ , expanding an analysis of…

nucl-ex2016★ 8 cited

Target and Beam-Target Spin Asymmetries in Exclusive Pion Electroproduction for $Q^{2} > 1$ GeV $^{2}$ . I. $e p \to e π^{+} n$

P. E. Bosted, M. J. Amaryan, S. Anefalos Pereira +115

Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive $π^{+}$ electroproduction reaction $γ^{*} p \to n π^{+}$ . The results were obtained…

nucl-ex2016★ 6 cited

Target and Beam-Target Spin Asymmetries in Exclusive $π^{+}$ and $π^{-}$ Electroproduction with 1.6 to 5.7 GeV Electrons

P. E. Bosted, A. S. Biselli, S. Careccia +159

Beam-target double spin asymmetries and target single-spin asymmetries in exclusive $π^{+}$ and $π^{-}$ electroproduction were obtained from scattering of 1.6 to 5.7 GeV longitudinally…

nucl-ex2016★ 63 cited

Measurement of two-photon exchange effect by comparing elastic $e^{\pm} p$ cross sections

D. Rimal, D. Adikaram, B. A. Raue +142

[Background] The electromagnetic form factors of the proton measured by unpolarized and polarized electron scattering experiments show a significant disagreement that grows with th…

nucl-ex2015★ 20 cited

Target and Double Spin Asymmetries of Deeply Virtual $π^{0}$ Production with a Longitudinally Polarized Proton Target and CLAS

A. Kim, H. Avakian, V. Burkert +126

The target and double spin asymmetries of the exclusive pseudoscalar channel $e p \to e p π^{0}$ were measured for the first time in the deep-inelastic regime using a longitudi…

nucl-ex2015★ 40 cited

First measurement of the helicity asymmetry $E$ in $η$ photoproduction on the proton

I. Senderovich, B. T. Morrison, M. Dugger +148

Results are presented for the first measurement of the double-polarization helicity asymmetry E for the $η$ photoproduction reaction $γ p \to η p$ . Data were obtained using t…

nucl-ex2015★ 5 cited

Determination of the Beam-Spin Asymmetry of Deuteron Photodisintegration in the Energy Region $E_{γ} = 1.1 - 2.3$ GeV

Nicholas Zachariou, Yordanka Ilieva, Nikolay Ya. Ivanov +140

The beam-spin asymmetry, $Σ$ , for the reaction $γ d \to p n$ has been measured using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerato…

nucl-ex2015★ 36 cited

First Measurement of the Polarization Observable E in the $p (γ, π^{+}) n$ Reaction up to 2.25 GeV

S. Strauch, W. J. Briscoe, M. Döring +165

First results from the longitudinally polarized frozen-spin target (FROST) program are reported. The double-polarization observable E, for the reaction $γ p \to π^{+} n$ , has…

nucl-ex2014★ 102 cited

Towards a resolution of the proton form factor problem: new electron and positron scattering data

D. Adikaram, D. Rimal, L. B. Weinstein +133

There is a significant discrepancy between the values of the proton electric form factor, $G_{E}^{p}$ , extracted using unpolarized and polarized electron scattering. Calculations predi…

nucl-ex2013★ 5 cited

Hard Two-body Photodisintegration of 3He

I. Pomerantz, Y. Ilieva, R. Gilman +197

We have measured cross sections for the gamma+3He->p+d reaction at photon energies of 0.4 - 1.4 GeV and a center-of-mass angle of 90 deg. We observe dimensional scaling above 0.7 G…

nucl-ex2012★ 3 cited

Near Threshold Neutral Pion Electroproduction at High Momentum Transfers and Generalized Form Factors

P. Khetarpal, P. Stoler, I. G. Aznauryan +157

We report the measurement of near threshold neutral pion electroproduction cross sections and the extraction of the associated structure functions on the proton in the kinematic ra…

nucl-ex2012★ 21 cited

Deep exclusive $π^{+}$ electroproduction off the proton at CLAS

K. Park, M. Guidal, R. W. Gothe +153

The exclusive electroproduction of $π^{+}$ above the resonance region was studied using the $CEBAF$ Large Acceptance Spectrometer ( $CLAS$ ) at Jefferson Laboratory by scatte…

Beam-spin asymmetry Σ for Σ− hyperon photoproduction off the neutron

First Measurements of the Double-Polarization Observables F, P, and H in ω Photoproduction off Transversely Polarized Protons in the N∗ Resonance Region

Beam-Target Helicity Asymmetry E in K0Λ and K0Σ0 Photoproduction on the Neutron

First Measurement of Ξ− Polarization in Photoproduction

Double KS0​ Photoproduction off the Proton at CLAS

Measurement of the beam asymmetry Σ and the target asymmetry T in the photoproduction of ω mesons off the proton using CLAS at Jefferson Laboratory

Semi-Inclusive π0​ target and beam-target asymmetries from 6 GeV electron scattering with CLAS

Measurement of the helicity asymmetry E in ω→π+π−π0 photoproduction

First Exclusive Measurement of Deeply Virtual Compton Scattering off 4He: Toward the 3D Tomography of Nuclei

Measurement of the Differential and Total Cross Sections of the γd→K0Λ(p) Reaction within the Resonance Region

Differential Cross Section Measurements for γn→π−p Above the First Nucleon Resonance Region

The Beam-Target Helicity Asymmetry for γ​n→π−p in the {\bf{N∗} Resonance Region

Target and beam-target spin asymmetries in exclusive pion electroproduction for Q2>1 GeV2. II. ep→eπ0p

Target and Beam-Target Spin Asymmetries in Exclusive Pion Electroproduction for Q2>1 GeV2. I. ep→eπ+n

Target and Beam-Target Spin Asymmetries in Exclusive π+ and π− Electroproduction with 1.6 to 5.7 GeV Electrons

Measurement of two-photon exchange effect by comparing elastic e±p cross sections

Target and Double Spin Asymmetries of Deeply Virtual π0 Production with a Longitudinally Polarized Proton Target and CLAS

First measurement of the helicity asymmetry E in η photoproduction on the proton

Determination of the Beam-Spin Asymmetry of Deuteron Photodisintegration in the Energy Region Eγ​=1.1−2.3 GeV

First Measurement of the Polarization Observable E in the p​(γ​,π+)n Reaction up to 2.25 GeV