Physics Letters B (Oct 2022)
Photoproduction of K+Λ(1405)→K+π0Σ0 extending to forward angles and low momentum transfer
- G. Scheluchin,
- T.C. Jude,
- S. Alef,
- P. Bauer,
- D. Bayadilov,
- R. Beck,
- A. Braghieri,
- P.L. Cole,
- D. Elsner,
- R. Di Salvo,
- A. Fantini,
- O. Freyermuth,
- F. Frommberger,
- F. Ghio,
- A. Gridnev,
- D. Hammann,
- J. Hannappel,
- K. Kohl,
- N. Kozlenko,
- A. Lapik,
- P. Levi Sandri,
- V. Lisin,
- G. Mandaglio,
- R. Messi,
- D. Moricciani,
- A. Mushkarenkov,
- V. Nedorezov,
- D. Novinskiy,
- P. Pedroni,
- A. Polonskiy,
- B.-E. Reitz,
- M. Romaniuk,
- H. Schmieden,
- V. Sumachev,
- V. Tarakanov
Affiliations
- G. Scheluchin
- Rheinische Friedrich-Wilhelms-Universität Bonn, Physikalisches Institut, Nußallee 12, 53115 Bonn, Germany
- T.C. Jude
- Rheinische Friedrich-Wilhelms-Universität Bonn, Physikalisches Institut, Nußallee 12, 53115 Bonn, Germany; Corresponding author.
- S. Alef
- Rheinische Friedrich-Wilhelms-Universität Bonn, Physikalisches Institut, Nußallee 12, 53115 Bonn, Germany
- P. Bauer
- Rheinische Friedrich-Wilhelms-Universität Bonn, Physikalisches Institut, Nußallee 12, 53115 Bonn, Germany
- D. Bayadilov
- Rheinische Friedrich-Wilhelms-Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Nußallee 14-16, 53115 Bonn, Germany; Petersburg Nuclear Physics Institute NRC “Kurchatov Institute”, Gatchina, Leningrad District, 188300, Russia
- R. Beck
- Rheinische Friedrich-Wilhelms-Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Nußallee 14-16, 53115 Bonn, Germany
- A. Braghieri
- INFN sezione di Pavia, Via Agostino Bassi, 6, 27100 Pavia, Italy
- P.L. Cole
- Lamar University, Department of Physics, Beaumont, TX, 77710, USA
- D. Elsner
- Rheinische Friedrich-Wilhelms-Universität Bonn, Physikalisches Institut, Nußallee 12, 53115 Bonn, Germany
- R. Di Salvo
- INFN Roma “Tor Vergata”, Via della Ricerca Scientifica 1, 00133, Rome, Italy
- A. Fantini
- INFN Roma “Tor Vergata”, Via della Ricerca Scientifica 1, 00133, Rome, Italy; Università di Roma “Tor Vergata”, Dipartimento di Fisica, Via della Ricerca Scientifica 1, 00133, Rome, Italy
- O. Freyermuth
- Rheinische Friedrich-Wilhelms-Universität Bonn, Physikalisches Institut, Nußallee 12, 53115 Bonn, Germany
- F. Frommberger
- Rheinische Friedrich-Wilhelms-Universität Bonn, Physikalisches Institut, Nußallee 12, 53115 Bonn, Germany
- F. Ghio
- INFN sezione di Roma La Sapienza, P. le Aldo Moro 2, 00185, Rome, Italy; Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
- A. Gridnev
- Petersburg Nuclear Physics Institute NRC “Kurchatov Institute”, Gatchina, Leningrad District, 188300, Russia
- D. Hammann
- Rheinische Friedrich-Wilhelms-Universität Bonn, Physikalisches Institut, Nußallee 12, 53115 Bonn, Germany
- J. Hannappel
- Rheinische Friedrich-Wilhelms-Universität Bonn, Physikalisches Institut, Nußallee 12, 53115 Bonn, Germany
- K. Kohl
- Rheinische Friedrich-Wilhelms-Universität Bonn, Physikalisches Institut, Nußallee 12, 53115 Bonn, Germany
- N. Kozlenko
- Petersburg Nuclear Physics Institute NRC “Kurchatov Institute”, Gatchina, Leningrad District, 188300, Russia
- A. Lapik
- Russian Academy of Sciences Institute for Nuclear Research, Prospekt 60-letiya Oktyabrya 7a, 117312, Moscow, Russia
- P. Levi Sandri
- INFN - Laboratori Nazionali di Frascati, Via E. Fermi 54, 00044, Frascati, Italy
- V. Lisin
- Russian Academy of Sciences Institute for Nuclear Research, Prospekt 60-letiya Oktyabrya 7a, 117312, Moscow, Russia
- G. Mandaglio
- INFN sezione Catania, 95129, Catania, Italy; Università degli Studi di Messina, Dipartimento MIFT, Via F. S. D'Alcontres 31, 98166, Messina, Italy
- R. Messi
- INFN Roma “Tor Vergata”, Via della Ricerca Scientifica 1, 00133, Rome, Italy; Università di Roma “Tor Vergata”, Dipartimento di Fisica, Via della Ricerca Scientifica 1, 00133, Rome, Italy
- D. Moricciani
- INFN - Laboratori Nazionali di Frascati, Via E. Fermi 54, 00044, Frascati, Italy
- A. Mushkarenkov
- Russian Academy of Sciences Institute for Nuclear Research, Prospekt 60-letiya Oktyabrya 7a, 117312, Moscow, Russia
- V. Nedorezov
- Russian Academy of Sciences Institute for Nuclear Research, Prospekt 60-letiya Oktyabrya 7a, 117312, Moscow, Russia
- D. Novinskiy
- Petersburg Nuclear Physics Institute NRC “Kurchatov Institute”, Gatchina, Leningrad District, 188300, Russia
- P. Pedroni
- INFN sezione di Pavia, Via Agostino Bassi, 6, 27100 Pavia, Italy
- A. Polonskiy
- Russian Academy of Sciences Institute for Nuclear Research, Prospekt 60-letiya Oktyabrya 7a, 117312, Moscow, Russia
- B.-E. Reitz
- Rheinische Friedrich-Wilhelms-Universität Bonn, Physikalisches Institut, Nußallee 12, 53115 Bonn, Germany
- M. Romaniuk
- INFN Roma “Tor Vergata”, Via della Ricerca Scientifica 1, 00133, Rome, Italy; Institute for Nuclear Research of NASU, 03028, Kyiv, Ukraine
- H. Schmieden
- Rheinische Friedrich-Wilhelms-Universität Bonn, Physikalisches Institut, Nußallee 12, 53115 Bonn, Germany
- V. Sumachev
- Petersburg Nuclear Physics Institute NRC “Kurchatov Institute”, Gatchina, Leningrad District, 188300, Russia
- V. Tarakanov
- Petersburg Nuclear Physics Institute NRC “Kurchatov Institute”, Gatchina, Leningrad District, 188300, Russia
- Journal volume & issue
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Vol. 833
p. 137375
Abstract
K+Λ(1405) photoproduction has been studied at the BGOOD experiment via the all neutral decay, Λ(1405)→Σ0π0. The unique BGOOD experimental setup allows both the cross section and Λ(1405) invariant mass distribution (line shape) to be measured over a broad K+ polar angle range, extending to extreme forward K+ angles unattainable at previous experiments.Evidence is provided for the role of a triangle singularity driven by the N⁎(2030) resonance, which appears to contribute significantly to K+Λ(1405) photoproduction. This is observed in the integrated cross section which was determined with unprecedented energy resolution and supported by the angular distributions. The measured line shape is also in agreement with the previous results of CLAS and ANKE, and is consistent with two poles derived in χPT based models.
