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

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arxiv 2207.06682 v2 pith:WB5GA4B7 submitted 2022-07-14 nucl-ex

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

S.J. Paul , S. Moran , M. Arratia , A. El Alaoui , H. Hakobyan , W. Brooks , M.J. Amaryan , W.R. Armstrong
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H. Atac L. Baashen N.A. Baltzell L. Barion M. Bashkanov M. Battaglieri I. Bedlinskiy B. Benkel F. Benmokhtar A. Bianconi L. Biondo A.S. Biselli M. Bondi F. Bossu S. Boiarinov K. Th. Brinkmann W.J. Briscoe D. Bulumulla V.D. Burkert R. Capobianco D.S. Carman A. Celentano V. Chesnokov T. Chetry G. Ciullo P.L. Cole M. Contalbrigo G. Costantini A. D'Angelo N. Dashyan R. De Vita M. Defurne A. Deur S. Diehl C. Dilks C. Djalali R. Dupre H. Egiyan L. El Fassi P. Eugenio S. Fegan A. Filippi G. Gavalian Y. Ghandilyan G.P. Gilfoyle A.A. Golubenko G. Gosta R.W. Gothe K.A. Griffioen M. Guidal M. Hattawy T.B. Hayward D. Heddle A. Hobart M. Holtrop Y. Ilieva D.G. Ireland E.L. Isupov H.S. Jo R. Johnston K. Joo S. Joosten D. Keller A. Khanal M. Khandaker W. Kim A. Kripko V. Kubarovsky V. Lagerquist L. Lanza M. Leali S. Lee P. Lenisa X. Li K. Livingston I.J.D. MacGregor D. Marchand V. Mascagna B. McKinnon Z.E. Meziani S. Migliorati R.G. Milner T. Mineeva M. Mirazita V.I. Mokeev P. Moran C. Munoz Camacho K. Neupane D. Nguyen S. Niccolai G. Niculescu M. Osipenko A.I. Ostrovidov P. Pandey M. Paolone L.L. Pappalardo R. Paremuzyan E. Pasyuk W. Phelps N. Pilleux D. Pocanic O. Pogorelko M. Pokhrel J. Poudel J.W. Price Y. Prok B.A. Raue T. Reed M. Ripani G. Rosner F. Sabatie C. Salgado A. Schmidt R.A. Schumacher Y.G. Sharabian E.V. Shirokov U. Shrestha P. Simmerling D. Sokhan N. Sparveris S. Stepanyan I.I. Strakovsky S. Strauch J.A. Tan R. Tyson M. Ungaro S. Vallarino L. Venturelli H. Voskanyan E. Voutier X. Wei R. Wishart M.H. Wood N. Zachariou Z.W. Zhao V. Ziegler M. Zurek (for the CLAS Collaboration)
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keywords pairsnuclearnucleisuppressionangularazimuthallydatadeuterium
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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

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