Tom Horn

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We have measured parity-violating asymmetries in elastic electron-proton scattering over the range of momentum transfers 0.12 < or =Q2 < or =1.0 GeV2. These asymmetries, arising from interference of the electromagnetic and neutral weak interactions, are sensitive to strange-quark contributions to the currents of the proton. The measurements were made at(More)
Citation Jefferson Lab Hall A Collaboration et al. " Cross sections and Rosenbluth separations in H-1(e,e'K[superscript +])Lambda up to Q[superscript 2]=2.35 GeV[superscript 2]. " Physical Review C 81.5 (2010): 052201. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's(More)
We have measured parity violating asymmetries in elastic electron-proton and quasi-elastic electron-deuteron scattering at backward electron angle. These measurements have been done at two momentum transfers : Q 2 = 0.22 and 0.63 (GeV/c) 2. Together with our previous forward angle measurement [1], we can extract strange quark contributions to the(More)
Inclusive scattering from nuclei at x > 1 is sensitive to the distribution of high momentum nucleons at low Q 2 values, and high momentum quarks at large Q 2 values. Large x data at 4 and 6 GeV are dominated by quasielastic and resonance production from high-momentum nucleons. With the 11 GeV beam, we propose to make measurements in the DIS region and(More)
We present deeply virtual π^{0} electroproduction cross-section measurements at x_{B}=0.36 and three different Q^{2} values ranging from 1.5 to 2  GeV^{2}, obtained from Jefferson Lab Hall A experiment E07-007. The Rosenbluth technique is used to separate the longitudinal and transverse responses. Results demonstrate that the cross section is dominated by(More)
Wide-angle exclusive Compton scattering and single-pion photoproduction from the proton have been investigated via measurement of the polarization transfer from a circularly polarized photon beam to the recoil proton. The wide-angle Compton scattering polarization transfer was analyzed at an incident photon energy of 3.7 GeV at a proton scattering angle of(More)
The study of exclusive π(±) electroproduction on the nucleon, including separation of the various structure functions, is of interest for a number of reasons. The ratio RL=σL(π-)/σL(π+) is sensitive to isoscalar contamination to the dominant isovector pion exchange amplitude, which is the basis for the determination of the charged pion form factor from(More)
We present new measurements of electron scattering from high-momentum nucleons in nuclei. These data allow an improved determination of the strength of two-nucleon correlations for several nuclei, including light nuclei where clustering effects can, for the first time, be examined. The data also include the kinematic region where three-nucleon correlations(More)
We propose to measure exclusive e + e − production with CLAS12 and an 11 GeV polarized beam impinging on a hydrogen target to study the reaction γp → γ * p ′ → e + e − p ′ , known as Timelike Compton Scattering (TCS). Both the four-fold differential cross section and the cosine and sine moments of the weighted cross section will be measured over a wide(More)
Citation Nuruzzaman et al. " Nuclear transparency and effective kaon-nucleon cross section from the A(e,e^{}K^{+}) reaction. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share(More)