J. Zhang

Probing hard/soft factorization via beam-spin asymmetry in exclusive pion electroproduction from the proton

A. C. Postuma, G. M. Huber, D. Gaskell, T. Horn et autres

Deep exclusive meson production (DEMP) reactions, such as $p(\vec{e},e'π^+)n$, provide opportunities to study the three-dimensional structure of the nucleon through differential cross section and beam- and target-spin asymmetry measurements. This work aims to probe the onset of the hard/soft factorization regime through …

ca, us, gb, kr, hr, Ghana, fr, am (code pays fourni par la source)

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)

Precision measurements of g 1 of the proton and of the deuteron with 6 GeV electrons

Y. Prok, P. Bosted, N. D. Kvaltine, K. P. Adhikari et autres

The inclusive polarized structure functions of the proton and deuteron, ${g}_{1}^{p}$ and ${g}_{1}^{d}$, were measured with high statistical precision using polarized 6 GeV electrons incident on a polarized ammonia target in Hall B at Jefferson Laboratory. Electrons scattered at laboratory angles between …

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

Measurement of Direct f0(980) Photoproduction on the Proton

M. Battaglieri, R. De Vita, Adam P. Szczepaniak, K. P. Adhikari et autres

We report on the results of the first measurement of exclusive ${f}_{0}(980)$ meson photoproduction on protons for ${E}_{\ensuremath{\gamma}}=3.0--3.8\text{ }\text{ }\mathrm{GeV}$ and $\ensuremath{-}t=0.4--1.0\text{ }\text{ }\mathrm{Ge}{\mathrm{V}}^{2}$. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The resonance was detected …

it, no, us, am, kr, ru, pl, fr, gb, cl, ua (code pays fourni par la source)

Measurement of Direct f0ð980Þ Photoproduction on the Proton

M. Battaglieri, R. De Vita, M. Aghasyan, P. Ambrozewicz et autres

M. Battaglieri, R. De Vita, A. P. Szczepaniak, K. P. Adhikari, M. Aghasyan, M. J. Amaryan, P. Ambrozewicz, M. Anghinolfi, G. Asryan, H. Avakian, H. Bagdasaryan, N. Baillie, J. P. Ball, N. A. Baltzell, V. Batourine, I. Bedlinskiy, M. Bellis, N. Benmouna, …