M. Khandaker

Proton transparency and neutrino physics: New methods and modeling

S. Dytman, M. Betancourt, N. Steinberg, L. B. Weinstein et autres

Extracting accurate results from neutrino oscillation and cross section experiments requires accurate simulation of the neutrino-nucleus interaction. The rescattering of outgoing hadrons (final state interactions) by the rest of the nucleus is an important component of these interactions. We present a new …

us, Ghana, il, fr, sa, gb, it, de, ec, ru, am, kr, cl (code pays fourni par la source)

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. Credé, E. Klempt et autres

The photoproduction of ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ meson pairs off the proton has been studied in the reaction $\ensuremath{\gamma}p\ensuremath{\rightarrow}p{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ using the CEBAF Large Acceptance Spectrometer (CLAS) and the frozen-spin target (FROST) in Hall B at the Thomas Jefferson National Accelerator Facility. For the first time, …

us, ru, fr, it, gb, de, ec, am, Ghana, uz, kr, cn (code pays fourni par la source)

Photoproduction of two charged pions off protons in the resonance region

A. Sarantsev, E. Klempt, K. Nikonov, P. Achenbach et autres

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 Accelerator Facility with the CLAS detector. The total and differential cross sections and spin-density …

ru, de, us, fr, Ghana, it, gb, am, ec, uz, kr (code pays fourni par la source)

Search for a Dark Photon in Electro-Produced $e^{+}e^{-}$ Pairs with the Heavy Photon Search Experiment at JLab

P. H. Adrian, N. A. Baltzell, M. Battaglieri, M. Bondí et autres

The Heavy Photon Search experiment took its first data in a 2015 engineering run using a 1.056 GeV, 50 nA electron beam provided by CEBAF at the Thomas Jefferson National Accelerator Facility, searching for an electro-produced dark photon. Using 1.7 days (1170 …

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

P. Bosted, A. Kim, K. P. Adhikari, D. Adikaram et autres

Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive ${\ensuremath{\pi}}^{0}$ electroproduction reaction ${\ensuremath{\gamma}}^{*}p\ensuremath{\rightarrow}p{\ensuremath{\pi}}^{0}$, expanding an analysis of the ${\ensuremath{\gamma}}^{*}p\ensuremath{\rightarrow}n{\ensuremath{\pi}}^{+}$ reaction from the same experiment. The results were obtained from scattering of 6-GeV longitudinally polarized electrons off longitudinally polarized protons …

us, it, fr, ru, cl, gb, am, kr (code pays fourni par la source)

Electroexcitation of the Δ+(1232) at low momentum transfer

A. Blomberg, D. Anez, N. Sparveris, A. Sarty et autres

We report on new p(e,e′p)π∘ measurements at the Δ+(1232) resonance at the low momentum transfer region, where the mesonic cloud dynamics is predicted to be dominant and rapidly changing, offering a test bed for chiral effective field theory calculations. The new data …

us, ca, gb, cn, il, it, si, fr, th, kr (code pays fourni par la source)

Photoproduction of the f1(1285) meson

R. Dickson, R. A. Schumacher, K. P. Adhikari, Z. Akbar et autres

The ${f}_{1}(1285)$ meson with mass $1281.0\ifmmode\pm\else\textpm\fi{}0.8$ MeV/${c}^{2}$ and width $18.4\ifmmode\pm\else\textpm\fi{}1.4$ MeV (full width at half maximum) was measured for the first time in photoproduction from a proton target using CLAS at Jefferson Lab. Differential cross sections were obtained via the $\ensuremath{\eta}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}},\phantom{\rule{0.28em}{0ex}}{K}^{+}{\overline{K}}^{0}{\ensuremath{\pi}}^{\ensuremath{-}}$, and …

us, it, fr, kr, ru, am, cl, gb (code pays fourni par la source)

Probing the Repulsive Core of the Nucleon-Nucleon Interaction via the He4(e,e′pN) Triple-Coincidence Reaction

I. Korover, N. Muangma, O. Hen, R. Shneor et autres

We studied simultaneously the $^{4}\mathrm{He}(e,{e}^{\ensuremath{'}}p)$, $^{4}\mathrm{He}(e,{e}^{\ensuremath{'}}pp)$, and $^{4}\mathrm{He}(e,{e}^{\ensuremath{'}}pn)$ reactions at ${Q}^{2}=2(\mathrm{GeV}/c{)}^{2}$ and ${x}_{B}>1$, for an $(e,{e}^{\ensuremath{'}}p)$ missing-momentum range of 400 to $830\text{ }\text{ }\mathrm{MeV}/c$. The knocked-out proton was detected in coincidence with a proton or neutron recoiling almost back to back to …

il, us, fr, ca, gb, cn, it, ua, kr, si, am (code pays fourni par la source)

Data analysis techniques, differential cross sections, and spin density matrix elements for the reaction γp→ϕp

B. Dey, C. A. Meyer, M. Bellis, M. Williams et autres

High-statistics measurements of differential cross sections and spin density matrix elements for the reaction $\ensuremath{\gamma}p\ensuremath{\rightarrow}\ensuremath{\phi}p$ have been made using the CLAS detector at Jefferson Lab. We cover center-of-mass energies ($\sqrt{s}$) from 1.97 to 2.84 GeV, with an extensive coverage in the $\ensuremath{\phi}$ …

us, it, gb, fr, ru, cl, am, kr (code pays fourni par la source)

Photoproduction of the ω Meson on the Proton at Large Momentum Transfer

M. Battaglieri, M. Brunoldi, R. De Vita, J.M. Laget et autres

The differential cross section, $d\ensuremath{\sigma}/dt$, for $\ensuremath{\omega}$ meson exclusive photoproduction on the proton above the resonance region ($2.6<W<2.9\text{ }\text{ }\mathrm{G}\mathrm{e}\mathrm{V}$) was measured up to a momentum transfer $\ensuremath{-}t=5\text{ }\text{ }{\mathrm{G}\mathrm{e}\mathrm{V}}^{2}$ using the CLAS detector at Jefferson Laboratory. The $\ensuremath{\omega}$ channel was identified …

it, fr, us, ru, no, kr (code pays fourni par la source)