nucl-ex digest · Jun 8, 2017

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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🇺🇸 · R. L. Workman🇺🇸 · A. E. Kudryavtsev🇷🇺 · A. Svarc🇭🇷 · V. E. Tarasov🇷🇺 · K.P. Adhikari🇺🇸 · S. Adhikari🇺🇸 · D. Adikaram🇺🇸 · Z. Akbar🇺🇸 · S. Anefalos Pereira🇮🇹 and 136 other authors

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 GeV to 2.366 GeV) for pion center-of-mass angles $cos θ_{π}^{c . m .}$ from -0.72 to 0.92. A correction for final state interactions has been applied to this data to extract the $γ n \to π^{-} p$ differential cross sections. These cross sections are quoted in 8428 $(E_{γ}, cos θ_{π}^{c . m .})$ bins, a factor of nearly three increase in the world statistics for this channel in this kinematic range. These new data help to constrain coupled-channel analysis fits used to disentangle the spectrum of $N^{*}$ resonances and extract their properties. Selected photon decay amplitudes $N^{*} \to γ n$ at the resonance poles are determined for the first time and are reported here.

nucl-exPRC(2017)·31 citations

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

Prediction and detection potential of fusion neutrinos from nearby stars

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

Prediction and detection potential of fusion neutrinos from nearby stars

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