Observation of azimuth-dependent suppression of hadron pairs in electron scattering off nuclei

(CLAS Collaboration)

Research output: Contribution to journalArticlepeer-review


We present the first measurement of di-hadron angular correlations in electron-nucleus scattering. The data were taken with the CLAS detector and a 5.0 GeV electron beam incident on deuterium, carbon, iron, and lead targets. Relative to deuterium, the nuclear yields of charged-pion pairs show a strong suppression for azimuthally opposite pairs, no suppression for azimuthally nearby pairs, and an enhancement of pairs with large invariant mass. These effects grow with increased nuclear size. The data are qualitatively described by the GiBUU model, which suggests that hadrons form near the nuclear surface and undergo multiple-scattering in nuclei. These results show that angular correlation studies can open a new way to elucidate how hadrons form and interact inside nuclei
Original languageEnglish
Article number 182501
Number of pages7
JournalPhysical Review Letters
Issue number18
Early online date25 Oct 2022
Publication statusPublished - 28 Oct 2022

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  • nucl-ex

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