A measurement of the differential cross section for the reaction $\gamma n\to {\pi }^{-}p$ from deuterium

Abstract

We report a measurement of the differential cross section for the $\gamma n\to {\pi }^{-}p$ process from the CLAS detector at Jefferson Lab in Hall B for photon energies between 1.0 and 3.5 GeV and pion center-of-mass (c.m.) angles (${\theta }_{c.m.}$) between 50${}^{\circ }$ and 115${}^{\circ }$. We confirm a previous indication of a broad enhancement around a c.m. energy ($\sqrt{s}$) of 2.2 GeV at ${\theta }_{c.m.}=90^{\circ }$ in the scaled differential cross section, $s^7\frac{d\sigma }{dt}$. Our data show the angular dependence of this enhancement as the scaling region is approached in the kinematic region from 70${}^{\circ }$ to 105${}^{\circ }$.

6 pages, 3 figures. submitted to PRL

References in corpus (3)

• Unitary Isobar Model - MAID2007
• ${\pi }^0$ photoproduction on the proton for photon energies from 0.675 to 2.875 GeV
• Regge approach to charged-pion photoproduction at invariant energies above 2 GeV

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