Document Type

Article

Publication Date

2009

DOI

10.1103/PhysRevLett.103.012301

Publication Title

Physical Review Letters

Volume

103

Issue

1

Pages

012301 (1-6)

Abstract

We report a measurement of the differential cross section for the γn →π⁻p process from the CLAS detector at Jefferson Laboratory in Hall B for photon energies between 1.0 and 3.5 GeV and pion center-of-mass (c.m.) angles (𝜃 c.m.) between 50° and 115°. We confirm a previous indication of a broad enhancement around a c.m. energy (√ s) of 2.1 GeV at 𝜃c.m. = 90° in the scaled differential cross section s7 dσdt and a rapid falloff in a center-of-mass energy region of about 400 MeV following the enhancement. Our data show an angular dependence of this enhancement as the suggested scaling region is approached for 𝜃c.m. from 70° degrees to 105°.

Comments

© 2009 The American Physical Society

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Publisher's version available at: https://doi.org/10.1103/PhysRevLett.103.012301

Original Publication Citation

Chen, W., Mibe, T., Dutta, D. ... Yegneswaran, A., Zhang, J., Zhao, B. (The CLAS Collaboration)(2009). Measurement of the differential cross section for the reaction γn →π⁻p from deuterium. Physical Review Letters, 103(1), 1-6, Article 012301. https://doi.org/10.1103/PhysRevLett.103.012301

ORCID

0000-0003-1582-2376 (Dodge), 0000-0001-7282-8120 (Hyde-Wright), 0000-0003-2243-6836 (Kuhn), 0000-0001-5416-2900 (Weinstein)

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