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Main Authors: Paul, S. J., Arratia, M., Hakobyan, H., Brooks, W., Acar, A., Achenbach, P., Alvarado, J. S., Armstrong, W. R., Baltzell, N. A., Barion, L., Bashkanov, M., Battaglieri, M., Benmokhtar, F., Bianconi, A., Biselli, A. S., Bossù, F., Boiarinov, S., Brinkmann, K. -T., Briscoe, W. J., Burkert, V., Cao, T., Carman, D. S., Chatagnon, P., Chinchay, H., Ciullo, G., Cole, P. L., D'Angelo, A., Dashyan, N., De Vita, R., Deur, A., Diehl, S., Djalali, C., Dupre, R., Egiyan, H., Alaoui, A. El, Elouadrhiri, L., Eugenio, P., Farooq, M., Fegan, S., Filippi, A., Fogler, C., Gavalian, G., Gilfoyle, G. P., Gothe, R. W., Gualtieri, B., Hattawy, M., Hauenstein, F., Hayward, T. B., Hoballah, M., Holtrop, M., Hung, Yu-Chun, Ilieva, Y., Ireland, D. G., Isupov, E. L., Jenkins, D., Jo, H. S., Keller, D., Khandaker, M., Kim, A., Klimenko, V., Korover, I., Kripko, A., Kubarovsky, V., Lanza, L., Lee, S., Lenisa, P., Li, X., Marchand, D., Mascagna, V., McKinnon, B., Mineeva, T., Mokeev, V., Cardenas, E. F. Molina, Camacho, C. Munoz, Nadel-Turonski, P., Nagorna, T., Neupane, K., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Ouillon, M., Pandey, P., Paolone, M., Pappalardo, L. L., Paremuzyan, R., Pasyuk, E., Paudel, C., Phelps, W., Pilleux, N., Vaishnavi, P. S. H., Rafael, S. Polcher, Polizzi, L., Price, J. W., Prok, Y., Radic, A., Reed, T., Richards, J., Ripani, M., Ritman, J., Rosner, G., Schadmand, S., Schmidt, A., Schumacher, R. A., Sharabian, Y., Shrestha, S., Sidoretti, E., Sokhan, D., Sparveris, N., Spreafico, M., Stepanyan, S., Strakovsky, I. I., Strauch, S., Tenorio, M., Codjo, F. Touchte, Tyson, R., Ungaro, M., Vallarino, S., Velasquez, C., Venturelli, L., Voskanyan, H., Voutier, E., Wang, Y., Watts, D. P., Weerasinghe, U., Wei, X., Wood, M. H., Xu, L., Xu, Z., Zurek, M.
Format: Preprint
Published: 2025
Subjects:
Online Access:https://arxiv.org/abs/2512.05083
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author Paul, S. J.
Arratia, M.
Hakobyan, H.
Brooks, W.
Acar, A.
Achenbach, P.
Alvarado, J. S.
Armstrong, W. R.
Baltzell, N. A.
Barion, L.
Bashkanov, M.
Battaglieri, M.
Benmokhtar, F.
Bianconi, A.
Biselli, A. S.
Bossù, F.
Boiarinov, S.
Brinkmann, K. -T.
Briscoe, W. J.
Burkert, V.
Cao, T.
Carman, D. S.
Chatagnon, P.
Chinchay, H.
Ciullo, G.
Cole, P. L.
D'Angelo, A.
Dashyan, N.
De Vita, R.
Deur, A.
Diehl, S.
Djalali, C.
Dupre, R.
Egiyan, H.
Alaoui, A. El
Elouadrhiri, L.
Eugenio, P.
Farooq, M.
Fegan, S.
Filippi, A.
Fogler, C.
Gavalian, G.
Gilfoyle, G. P.
Gothe, R. W.
Gualtieri, B.
Hattawy, M.
Hauenstein, F.
Hayward, T. B.
Hoballah, M.
Holtrop, M.
Hung, Yu-Chun
Ilieva, Y.
Ireland, D. G.
Isupov, E. L.
Jenkins, D.
Jo, H. S.
Keller, D.
Khandaker, M.
Kim, A.
Klimenko, V.
Korover, I.
Kripko, A.
Kubarovsky, V.
Lanza, L.
Lee, S.
Lenisa, P.
Li, X.
Marchand, D.
Mascagna, V.
McKinnon, B.
Mineeva, T.
Mokeev, V.
Cardenas, E. F. Molina
Camacho, C. Munoz
Nadel-Turonski, P.
Nagorna, T.
Neupane, K.
Niccolai, S.
Niculescu, G.
Osipenko, M.
Ostrovidov, A. I.
Ouillon, M.
Pandey, P.
Paolone, M.
Pappalardo, L. L.
Paremuzyan, R.
Pasyuk, E.
Paudel, C.
Phelps, W.
Pilleux, N.
Vaishnavi, P. S. H.
Rafael, S. Polcher
Polizzi, L.
Price, J. W.
Prok, Y.
Radic, A.
Reed, T.
Richards, J.
Ripani, M.
Ritman, J.
Rosner, G.
Schadmand, S.
Schmidt, A.
Schumacher, R. A.
Sharabian, Y.
Shrestha, S.
Sidoretti, E.
Sokhan, D.
Sparveris, N.
Spreafico, M.
Stepanyan, S.
Strakovsky, I. I.
Strauch, S.
Tenorio, M.
Codjo, F. Touchte
Tyson, R.
Ungaro, M.
Vallarino, S.
Velasquez, C.
Venturelli, L.
Voskanyan, H.
Voutier, E.
Wang, Y.
Watts, D. P.
Weerasinghe, U.
Wei, X.
Wood, M. H.
Xu, L.
Xu, Z.
Zurek, M.
author_facet Paul, S. J.
Arratia, M.
Hakobyan, H.
Brooks, W.
Acar, A.
Achenbach, P.
Alvarado, J. S.
Armstrong, W. R.
Baltzell, N. A.
Barion, L.
Bashkanov, M.
Battaglieri, M.
Benmokhtar, F.
Bianconi, A.
Biselli, A. S.
Bossù, F.
Boiarinov, S.
Brinkmann, K. -T.
Briscoe, W. J.
Burkert, V.
Cao, T.
Carman, D. S.
Chatagnon, P.
Chinchay, H.
Ciullo, G.
Cole, P. L.
D'Angelo, A.
Dashyan, N.
De Vita, R.
Deur, A.
Diehl, S.
Djalali, C.
Dupre, R.
Egiyan, H.
Alaoui, A. El
Elouadrhiri, L.
Eugenio, P.
Farooq, M.
Fegan, S.
Filippi, A.
Fogler, C.
Gavalian, G.
Gilfoyle, G. P.
Gothe, R. W.
Gualtieri, B.
Hattawy, M.
Hauenstein, F.
Hayward, T. B.
Hoballah, M.
Holtrop, M.
Hung, Yu-Chun
Ilieva, Y.
Ireland, D. G.
Isupov, E. L.
Jenkins, D.
Jo, H. S.
Keller, D.
Khandaker, M.
Kim, A.
Klimenko, V.
Korover, I.
Kripko, A.
Kubarovsky, V.
Lanza, L.
Lee, S.
Lenisa, P.
Li, X.
Marchand, D.
Mascagna, V.
McKinnon, B.
Mineeva, T.
Mokeev, V.
Cardenas, E. F. Molina
Camacho, C. Munoz
Nadel-Turonski, P.
Nagorna, T.
Neupane, K.
Niccolai, S.
Niculescu, G.
Osipenko, M.
Ostrovidov, A. I.
Ouillon, M.
Pandey, P.
Paolone, M.
Pappalardo, L. L.
Paremuzyan, R.
Pasyuk, E.
Paudel, C.
Phelps, W.
Pilleux, N.
Vaishnavi, P. S. H.
Rafael, S. Polcher
Polizzi, L.
Price, J. W.
Prok, Y.
Radic, A.
Reed, T.
Richards, J.
Ripani, M.
Ritman, J.
Rosner, G.
Schadmand, S.
Schmidt, A.
Schumacher, R. A.
Sharabian, Y.
Shrestha, S.
Sidoretti, E.
Sokhan, D.
Sparveris, N.
Spreafico, M.
Stepanyan, S.
Strakovsky, I. I.
Strauch, S.
Tenorio, M.
Codjo, F. Touchte
Tyson, R.
Ungaro, M.
Vallarino, S.
Velasquez, C.
Venturelli, L.
Voskanyan, H.
Voutier, E.
Wang, Y.
Watts, D. P.
Weerasinghe, U.
Wei, X.
Wood, M. H.
Xu, L.
Xu, Z.
Zurek, M.
contents We report on the first measurement of angular correlations between high-energy pions and slow protons in electron-nucleus ($eA$) scattering, providing a new probe of how a nucleus responds to a fast-moving quark. The experiment employed the CLAS detector with a 5-GeV electron beam incident on deuterium, carbon, iron, and lead targets. For heavier nuclei, the pion-proton correlation function is more spread-out in azimuth than for lighter ones, and this effect is more pronounced in the $πp$ channel than in earlier $ππ$ studies. The proton-to-pion yield ratio likewise rises with nuclear mass, although the increase appears to saturate for the heaviest targets. These trends are qualitatively reproduced by state-of-the-art $eA$ event generators, including BeAGLE, eHIJING, and GiBUU, indicating that current descriptions of target fragmentation rest on sound theoretical footing. At the same time, the precision of our data exposes model-dependent discrepancies, delineating a clear path for future improvements in the treatment of cold-nuclear matter effects in $eA$ scattering.
format Preprint
id arxiv_https___arxiv_org_abs_2512_05083
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle First Study of the Nuclear Response to Fast Hadrons via Angular Correlations between Pions and Slow Protons in Electron-Nucleus Scattering
Paul, S. J.
Arratia, M.
Hakobyan, H.
Brooks, W.
Acar, A.
Achenbach, P.
Alvarado, J. S.
Armstrong, W. R.
Baltzell, N. A.
Barion, L.
Bashkanov, M.
Battaglieri, M.
Benmokhtar, F.
Bianconi, A.
Biselli, A. S.
Bossù, F.
Boiarinov, S.
Brinkmann, K. -T.
Briscoe, W. J.
Burkert, V.
Cao, T.
Carman, D. S.
Chatagnon, P.
Chinchay, H.
Ciullo, G.
Cole, P. L.
D'Angelo, A.
Dashyan, N.
De Vita, R.
Deur, A.
Diehl, S.
Djalali, C.
Dupre, R.
Egiyan, H.
Alaoui, A. El
Elouadrhiri, L.
Eugenio, P.
Farooq, M.
Fegan, S.
Filippi, A.
Fogler, C.
Gavalian, G.
Gilfoyle, G. P.
Gothe, R. W.
Gualtieri, B.
Hattawy, M.
Hauenstein, F.
Hayward, T. B.
Hoballah, M.
Holtrop, M.
Hung, Yu-Chun
Ilieva, Y.
Ireland, D. G.
Isupov, E. L.
Jenkins, D.
Jo, H. S.
Keller, D.
Khandaker, M.
Kim, A.
Klimenko, V.
Korover, I.
Kripko, A.
Kubarovsky, V.
Lanza, L.
Lee, S.
Lenisa, P.
Li, X.
Marchand, D.
Mascagna, V.
McKinnon, B.
Mineeva, T.
Mokeev, V.
Cardenas, E. F. Molina
Camacho, C. Munoz
Nadel-Turonski, P.
Nagorna, T.
Neupane, K.
Niccolai, S.
Niculescu, G.
Osipenko, M.
Ostrovidov, A. I.
Ouillon, M.
Pandey, P.
Paolone, M.
Pappalardo, L. L.
Paremuzyan, R.
Pasyuk, E.
Paudel, C.
Phelps, W.
Pilleux, N.
Vaishnavi, P. S. H.
Rafael, S. Polcher
Polizzi, L.
Price, J. W.
Prok, Y.
Radic, A.
Reed, T.
Richards, J.
Ripani, M.
Ritman, J.
Rosner, G.
Schadmand, S.
Schmidt, A.
Schumacher, R. A.
Sharabian, Y.
Shrestha, S.
Sidoretti, E.
Sokhan, D.
Sparveris, N.
Spreafico, M.
Stepanyan, S.
Strakovsky, I. I.
Strauch, S.
Tenorio, M.
Codjo, F. Touchte
Tyson, R.
Ungaro, M.
Vallarino, S.
Velasquez, C.
Venturelli, L.
Voskanyan, H.
Voutier, E.
Wang, Y.
Watts, D. P.
Weerasinghe, U.
Wei, X.
Wood, M. H.
Xu, L.
Xu, Z.
Zurek, M.
Nuclear Experiment
We report on the first measurement of angular correlations between high-energy pions and slow protons in electron-nucleus ($eA$) scattering, providing a new probe of how a nucleus responds to a fast-moving quark. The experiment employed the CLAS detector with a 5-GeV electron beam incident on deuterium, carbon, iron, and lead targets. For heavier nuclei, the pion-proton correlation function is more spread-out in azimuth than for lighter ones, and this effect is more pronounced in the $πp$ channel than in earlier $ππ$ studies. The proton-to-pion yield ratio likewise rises with nuclear mass, although the increase appears to saturate for the heaviest targets. These trends are qualitatively reproduced by state-of-the-art $eA$ event generators, including BeAGLE, eHIJING, and GiBUU, indicating that current descriptions of target fragmentation rest on sound theoretical footing. At the same time, the precision of our data exposes model-dependent discrepancies, delineating a clear path for future improvements in the treatment of cold-nuclear matter effects in $eA$ scattering.
title First Study of the Nuclear Response to Fast Hadrons via Angular Correlations between Pions and Slow Protons in Electron-Nucleus Scattering
topic Nuclear Experiment
url https://arxiv.org/abs/2512.05083