First Measurement of $\Lambda$ Electroproduction off Nuclei in the Current and Target Fragmentation Regions
Abstract
We report results of hyperon production in semi-inclusive deep-inelastic scattering off deuterium, carbon, iron, and lead targets obtained with the CLAS detector and the Continuous Electron Beam Accelerator Facility 5.014~GeV electron beam. These results represent the first measurements of the multiplicity ratio and transverse momentum broadening as a function of the energy fraction~() in the current and target fragmentation regions. The multiplicity ratio exhibits a strong suppression at high~~and~an enhancement at~low~. The measured transverse momentum broadening is an order of magnitude greater than that seen for light mesons. This indicates that the propagating entity interacts very strongly with the nuclear medium, which suggests that propagation of diquark configurations in the nuclear medium takes place at least part of the time, even at high~. The trends of these results are qualitatively described by the Giessen Boltzmann-Uehling-Uhlenbeck transport model, particularly for the multiplicity ratios. These observations will potentially open a new era of studies of the structure of the nucleon as well as of strange baryons.
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Cite
@article{arxiv.2210.13691,
title = {First Measurement of $\Lambda$ Electroproduction off Nuclei in the Current and Target Fragmentation Regions},
author = {T. Chetry and L. El Fassi and W. K. Brooks and R. Dupré and A. El Alaoui and K. Hafidi and P. Achenbach and K. P. Adhikari and Z. Akbar and W. R. Armstrong and M. Arratia and H. Atac and H. Avakian and L. Baashen and N. A. Baltzell and L. Barion and M. Bashkanov and M. Battaglieri and I. Bedlinskiy and B. Benkel and F. Benmokhtar and A. Bianconi and A. S. Biselli and M. Bondi and W. A. Booth and F. Bossù and S. Boiarinov and K. -Th. Brinkmann and W. J. Briscoe and D. Bulumulla and V. D. Burkert and D. S. Carman and J. C. Carvajal and A. Celentano and P. Chatagnon and V. Chesnokov and G. Ciullo and P. L. Cole and M. Contalbrigo and G. Costantini and A. D'Angelo and N. Dashyan and R. De Vita and M. Defurne and A. Deur and S. Diehl and C. Djalali and H. Egiyan and L. Elouadrhiri and P. Eugenio and S. Fegan and A. Filippi and G. Gavalian and Y. Ghandilyan and G. P. Gilfoyle and D. I. Glazier and A. A. Golubenko and G. Gosta and R. W. Gothe and K. A. Griffioen and M. Guidal and L. Guo and H. Hakobyan and M. Hattawy and T. B. Hayward and D. Heddle and A. Hobart and M. Holtrop and Y. Ilieva and D. G. Ireland and E. L. Isupov and D. Jenkins and H. S. Jo and M. L. Kabir and A. Khanal and M. Khandaker and A. Kim and W. Kim and F. J. Klein and A. Kripko and V. Kubarovsky and V. Lagerquist and L. Lanza and M. Leali and S. Lee and P. Lenisa and X. Li and K. Livingston and I. J. D. MacGregor and D. Marchand and V. Mascagna and B. McKinnon and C. McLauchlin and Z. E. Meziani and S. Migliorati and T. Mineeva and M. Mirazita and V. Mokeev and C. Munoz Camacho and P. Nadel-Turonski and K. Neupane and S. Niccolai and M. Nicol and G. Niculescu and M. Osipenko and A. I. Ostrovidov and P. Pandey and M. Paolone and L. L. Pappalardo and R. Paremuzyan and E. Pasyuk and S. J. Paul and W. Phelps and N. Pilleux and M. Pokhrel and J. Poudel and J. W. Price and Y. Prok and B. A. Raue and T. Reed and J. Richards and M. Ripani and J. Ritman and G. Rosner and F. Sabatié and C. Salgado and S. Schadmand and A. Schmidt and R. A. Schumacher and Y. G. Sharabian and E. V. Shirokov and U. Shrestha and P. Simmerling and D. Sokhan and N. Sparveris and S. Stepanyan and I. I. Strakovsky and S. Strauch and J. A. Tan and N. Trotta and R. Tyson and M. Ungaro and S. Vallarino and L. Venturelli and H. Voskanyan and E. Voutier and X. Wei and L. B. Weinstein and R. Williams and R. Wishart and M. H. Wood and N. Zachariou and Z. W. Zhao and M. Zurek},
journal= {arXiv preprint arXiv:2210.13691},
year = {2023}
}
Comments
14 pages, 6 figures