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S Niccolai

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Articles 57
Citations 16
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Recent Articles
11.
Carver M, Celentano A, Hicks K, Marsicano L, Mathieu V, Pilloni A, et al.
Phys Rev Lett . 2021 Mar; 126(8):082002. PMID: 33709753
The quark structure of the f_{2}(1270) meson has, for many years, been assumed to be a pure quark-antiquark (qq[over ¯]) resonance with quantum numbers J^{PC}=2^{++}. Recently, it was proposed that...
12.
Hattawy M, Baltzell N, Dupre R, Bultmann S, De Vita R, Alaoui A, et al.
Phys Rev Lett . 2019 Aug; 123(3):032502. PMID: 31386486
In the past two decades, deeply virtual Compton scattering of electrons has been successfully used to advance our knowledge of the partonic structure of the free proton and investigate correlations...
13.
Duer M, Schmidt A, Pybus J, Segarra E, Hrnjic A, Denniston A, et al.
Phys Rev Lett . 2019 May; 122(17):172502. PMID: 31107086
We measured the triple coincidence A(e,e^{'}np) and A(e,e^{'}pp) reactions on carbon, aluminum, iron, and lead targets at Q^{2}>1.5  (GeV/c)^{2}, x_{B}>1.1 and missing momentum >400  MeV/c. This was the first direct...
14.
Roy P, Park S, Crede V, Anisovich A, Klempt E, Nikonov V, et al.
Phys Rev Lett . 2019 May; 122(16):162301. PMID: 31075002
First measurements of double-polarization observables in ω photoproduction off the proton are presented using transverse target polarization and data from the CEBAF Large Acceptance Spectrometer (CLAS) FROST experiment at Jefferson...
15.
Cohen E, Hen O, Piasetzky E, Weinstein L, Schmidt A, Hakobyan H, et al.
Phys Rev Lett . 2018 Sep; 121(9):092501. PMID: 30230869
Short-range correlated (SRC) nucleon pairs are a vital part of the nucleus, accounting for almost all nucleons with momentum greater than the Fermi momentum (k_{F}). A fundamental characteristic of SRC...
16.
Adhikari K, Deur A, Fassi L, Kang H, Kuhn S, Ripani M, et al.
Phys Rev Lett . 2018 Feb; 120(6):062501. PMID: 29481214
We measured the g_{1} spin structure function of the deuteron at low Q^{2}, where QCD can be approximated with chiral perturbation theory (χPT). The data cover the resonance region, up...
17.
Hattawy M, Baltzell N, Dupre R, Hafidi K, Stepanyan S, Bultmann S, et al.
Phys Rev Lett . 2017 Dec; 119(20):202004. PMID: 29219329
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 uses the 6 GeV electron...
18.
Ho D, Peng P, Bass C, Collins P, DAngelo A, Deur A, et al.
Phys Rev Lett . 2017 Jul; 118(24):242002. PMID: 28665642
We report the first beam-target double-polarization asymmetries in the γ+n(p)→π^{-}+p(p) reaction spanning the nucleon resonance region from invariant mass W=1500 to 2300 MeV. Circularly polarized photons and longitudinally polarized deuterons...
19.
Jo H, Girod F, Avakian H, Burkert V, Garcon M, Guidal M, et al.
Phys Rev Lett . 2015 Dec; 115(21):212003. PMID: 26636848
Unpolarized and beam-polarized fourfold cross sections (d^{4}σ/dQ^{2}dx_{B}dtdϕ) for the ep→e^{'}p^{'}γ reaction were measured using the CLAS detector and the 5.75-GeV polarized electron beam of the Jefferson Lab accelerator, for 110...
20.
Adikaram D, Rimal D, Weinstein L, Raue B, Khetarpal P, Bennett R, et al.
Phys Rev Lett . 2015 Feb; 114(6):062003. PMID: 25723209
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 predict that small two-photon exchange (TPE) contributions...