First Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">Λ</mml:mi></mml:math> Electroproduction off Nuclei in the Current and Target Fragmentation Regions
T. ChetryFlorida International University, Miami, Florida 33199, USAL. El FassiMississippi State University, Mississippi State, Mississippi 39762-5167, USAW. K. BrooksCenter for Science and Technology of Valparaíso, 699 Valparaíso, ChileR. DupréUniversit'e Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, FranceA. El AlaouiUniversidad Técnica Federico Santa María, Casilla, 110-V Valparaíso, ChileK. HafidiArgonne National Laboratory, Argonne, Illinois 60439, USAP. AchenbachThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAK. P. AdhikariMississippi State University, Mississippi State, Mississippi 39762-5167, USAZ. AkbarUniversity of Virginia, Charlottesville, Virginia 22901, USAW. ArmstrongArgonne National Laboratory, Argonne, Illinois 60439, USAM. ArratiaUniversity of California Riverside, 900 University Avenue, Riverside, California 92521, USAH. AtaçTemple University, Philadelphia, Pennsylvania 19122, USAH. AvakianThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAL. BaashenFlorida International University, Miami, Florida 33199, USAN. A. BaltzellThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAL. BarionINFN, Sezione di Ferrara, 44100 Ferrara, ItalyM. BashkanovUniversity of York, York YO10 5DD, United KingdomM. BattaglieriINFN, Sezione di Genova, 16146 Genova, ItalyI. BedlinskiyNational Research Centre Kurchatov Institute - ITEP, Moscow 117259, RussiaBruno BenkelUniversidad Técnica Federico Santa María, Casilla, 110-V Valparaíso, ChileF. BenmokhtarDuquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, USAA. BianconiINFN, Sezione di Pavia, 27100 Pavia, ItalyA. S. BiselliCarnegie Mellon University, Pittsburgh, Pennsylvania 15213, USAM. BondíINFN, Sezione di Roma Tor Vergata, 00133 Rome, ItalyW. A. BoothUniversity of York, York YO10 5DD, United KingdomF. BossúIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceS. BoiarinovThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAK.-Th. BrinkmannII Physikalisches Institut der Universitaet Giessen, 35392 Giessen, GermanyW. J. BriscoeThe George Washington University, Washington, D.C. 20052, USAD. BulumullaOld Dominion University, Norfolk, Virginia 23529, USAVolker BurkertThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAD. S. CarmanThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAJ. CarvajalFlorida International University, Miami, Florida 33199, USAA. CelentanoINFN, Sezione di Genova, 16146 Genova, ItalyP. ChatagnonThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAV. ChesnokovOhio University, Athens, Ohio 45701, USAG. CiulloINFN, Sezione di Ferrara, 44100 Ferrara, ItalyP. L. ColeCatholic University of America, Washington, D.C. 20064, USAM. ContalbrigoINFN, Sezione di Ferrara, 44100 Ferrara, ItalyG. CostantiniINFN, Sezione di Pavia, 27100 Pavia, ItalyA. D’AngeloINFN, Sezione di Roma Tor Vergata, 00133 Rome, ItalyN. DashyanYerevan Physics Institute, 375036 Yerevan, ArmeniaR. De VitaINFN, Sezione di Genova, 16146 Genova, ItalyM. DefurneIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceA. DeurThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAS. DiehlII Physikalisches Institut der Universitaet Giessen, 35392 Giessen, GermanyC. DjalaliOhio University, Athens, Ohio 45701, USAH. EgiyanThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAL. ElouadrhiriThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAP. EugenioFlorida State University, Tallahassee, Florida 32306, USAS. FeganUniversity of York, York YO10 5DD, United KingdomA. FilippiINFN, Sezione di Torino, 10125 Torino, ItalyG. GavalianThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAY. GhandilyanYerevan Physics Institute, 375036 Yerevan, ArmeniaG. P. GilfoyleUniversity of Richmond, Richmond, Virginia 23173, USAD. I. GlazierUniversity of Glasgow, Glasgow G12 8QQ, United KingdomA. A. GolubenkoSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, RussiaG. GostaUniversit'a degli Studi di Brescia, 25123 Brescia, ItalyR. W. GotheUniversity of South Carolina, Columbia, South Carolina 29208, USAK. A. GriffioenCollege of William and Mary, Williamsburg, Virginia 23187-8795, USAM. GuidalUniversit'e Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, FranceL. GuoFlorida International University, Miami, Florida 33199, USAH. HakobyanUniversidad Técnica Federico Santa María, Casilla, 110-V Valparaíso, ChileM. HattawyOld Dominion University, Norfolk, Virginia 23529, USAT. B. HaywardUniversity of Connecticut, Storrs, Connecticut 06269, USAD. HeddleChristopher Newport University, Newport News, Virginia 23606, USAA. HobartUniversit'e Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, FranceM. HoltropUniversity of New Hampshire, Durham, New Hampshire 03824-3568, USAY. IlievaUniversity of South Carolina, Columbia, South Carolina 29208, USAD. G. IrelandUniversity of Glasgow, Glasgow G12 8QQ, United KingdomE. L. IsupovSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, RussiaD. JenkinsVirginia Tech, Blacksburg, Virginia 24061-0435, USAH. S. JoKyungpook National University, Daegu 41566, Republic of KoreaM. L. KabirMississippi State University, Mississippi State, Mississippi 39762-5167, USAA. KhanalFlorida International University, Miami, Florida 33199, USAM. KhandakerNorfolk State University, Norfolk, Virginia 23504, USAA. KimUniversity of Connecticut, Storrs, Connecticut 06269, USAW. KimKyungpook National University, Daegu 41566, Republic of KoreaF. J. KleinCatholic University of America, Washington, D.C. 20064, USAÁ. KripkóII Physikalisches Institut der Universitaet Giessen, 35392 Giessen, GermanyV. KubarovskyRensselaer Polytechnic Institute, Troy, New York 12180-3590, USAV. LagerquistOld Dominion University, Norfolk, Virginia 23529, USAL. LanzaINFN, Sezione di Roma Tor Vergata, 00133 Rome, ItalyM. LealiINFN, Sezione di Pavia, 27100 Pavia, ItalyS. LeeArgonne National Laboratory, Argonne, Illinois 60439, USAP. LenisaINFN, Sezione di Ferrara, 44100 Ferrara, ItalyX. LiMassachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USAK. LivingstonUniversity of Glasgow, Glasgow G12 8QQ, United KingdomI. J. D. MacGregorUniversity of Glasgow, Glasgow G12 8QQ, United KingdomD. MarchandUniversit'e Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, FranceV. MascagnaINFN, Sezione di Pavia, 27100 Pavia, ItalyB. McKinnonUniversity of Glasgow, Glasgow G12 8QQ, United KingdomC. McLauchlinUniversity of South Carolina, Columbia, South Carolina 29208, USAZ. E. MezianiArgonne National Laboratory, Argonne, Illinois 60439, USAS. MiglioratiINFN, Sezione di Pavia, 27100 Pavia, ItalyT. MineevaUniversidad Técnica Federico Santa María, Casilla, 110-V Valparaíso, ChileM. MirazitaINFN, Laboratori Nazionali di Frascati, 00044 Frascati, ItalyV. MokeevThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USAC. Muñoz CamachoUniversit'e Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, FranceP. Nadel-TurońskiThomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
2023en
ABI
Аннотация
We report results of Λ 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 Λ multiplicity ratio and transverse momentum broadening as a function of the energy fraction (z) in the current and target fragmentation regions. The multiplicity ratio exhibits a strong suppression at high z and an enhancement at low z. 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 z. 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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