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Spectroscopy of Strange Mesons and First Observation of a Strange Crypto-Exotic State with $J^P=0^-$

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arxiv 2504.09470 v1 pith:JRH246CD submitted 2025-04-13 hep-ex hep-ph

G. D. Alexeev , M. G. Alexeev , C. Alice , A. Amoroso , V. Andrieux , V. Anosov , K. Augsten , W. Augustyniak
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C. D. R. Azevedo B. Badelek R. Beck J. Beckers Y. Bedfer J. Bernhard F. Bradamante A. Bressan W.-C. Chang C. Chatterjee M. Chiosso S.-U. Chung A. Cicuttin M. L. Crespo D. D'Ago S. Dalla Torre S. S. Dasgupta S. Dasgupta F. Delcarro I. Denisenko O. Yu. Denisov S. V. Donskov N. Doshita Ch. Dreisbach W. Dünnweber R. R. Dusaev D. Ecker P. Faccioli M. Faessler M. Finger M. Finger jr. H. Fischer K. J. Flöthner W. Florian J. M. Friedrich V. Frolov L.G. Garcia Ordònez O. P. Gavrichtchouk S. Gerassimov J. Giarra D. Giordano A. Grasso A. Gridin M. Grosse Perdekamp B. Grube M. Grüner A. Guskov P. Haas D. von Harrach M. Hoffmann N. d'Hose C.-Y. Hsieh S. Ishimoto A. Ivanov T. Iwata V. Jary R. Joosten E. Kabuss F. Kaspar A. Kerbizi B. Ketzer G. V. Khaustov J. H. Koivuniemi V. N. Kolosov K. Kondo Horikawa I. Konorov A. Yu. Korzenev A. M. Kotzinian O. M. Kouznetsov A. Koval F. Krinner F. Kunne K. Kurek R. P. Kurjata G. Kurten K. Lavickova S. Levorato Y.-S. Lian J. Lichtenstadt P.-J. Lin R. Longo V. E. Lyubovitskij A. Maggiora N. Makke G. K. Mallot A. Maltsev A. Martin J. Marzec J. Matoušek T. Matsuda C. Menezes Pires F. Metzger W. Meyer M. Mikhasenko E. Mitrofanov D. Miura Y. Miyachi R. Molina A. Moretti A. Nagaytsev D. Neyret M. Niemiec J. Nový W.-D. Nowak G. Nukazuka A. G. Olshevsky M. Ostrick D. Panzieri B. Parsamyan S. Paul H. Pekeler J.-C. Peng M. Pešek D. V. Peshekhonov M. Pešková S. Platchkov J. Pochodzalla V. A. Polyakov C. Quintans G. Reicherz C. Riedl D. I. Ryabchikov A. Rychter A. Rymbekova V. D. Samoylenko A. Sandacz S. Sarkar I. A. Savin G. Sbrizzai H. Schmieden A. Selyunin S. Seriubin L. Sinha D. Spülbeck A. Srnka M. Stolarski M. Sulc H. Suzuki S. Tessaro F. Tessarotto A. Thiel F. Tosello A. Townsend V. Tskhay B. Valinoti B. M. Veit J.F.C.A. Veloso A. Vijayakumar M. Virius M. Wagner S. Wallner K. Zaremba M. Zavertyaev M. Zemko E. Zemlyanichkina M. Ziembicki
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classification hep-exhep-ph
keywords statesstrangecrypto-exoticfirstreactionspectrumstatestrange-meson
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We measured the strange-meson spectrum in the scattering reaction $K^{-}+p \rightarrow K^{-}\pi^{-}\pi^{-}+p$ with the COMPASS spectrometer at CERN. Using the world's largest sample of this reaction, we performed a comprehensive partial-wave analysis of the mesonic final state. It substantially extends the strange-meson spectrum covering twelve states with masses up to 2.4 GeV/$c^2$. We observe the first candidate for a crypto-exotic strange meson with $J^{P}=0^{-}$ and find $K_3$ and $K_4$ states consistent with predictions for the ground states.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. The supernumerary $K(1690)$ signal from COMPASS as a strange hybrid state

    hep-ph 2026-07 conditional novelty 6.0 of 10

    Among three pseudoscalar strange mesons seen at 1–2 GeV, the K(1690) is the one the quark model cannot accommodate, and its computed decay width as a 0⁻ strange hybrid matches experiment.

  2. Measurements of transverse-momentum dependent effects in semi-inclusive DIS at COMPASS

    hep-ex 2026-05 unverdicted novelty 4.0 of 10

    New COMPASS data from polarized deuteron targets reduce uncertainties on d-quark transversity by a factor of 2.5 at large Bjorken x and will enable first extraction of the Boer-Mulders function from unpolarized nucleon data.

  3. QCD sum rule analysis of local meson-meson currents for the $K(1690)$ state

    hep-ph 2026-04 unverdicted novelty 4.0 of 10

    QCD sum rules with local meson-meson currents for the K(1690) consistently predict masses around 2 GeV or above, disfavoring a molecular interpretation in favor of a compact multiquark state.

  4. Production of high-orbital kaon excited states in the $K^{-}p$ reaction

    hep-ph 2026-06 unverdicted novelty 3.0 of 10

    An effective Lagrangian approach calibrated with one adjustable parameter from data reproduces cross sections for K3*(1780), K2(1820), K2(1770) and K4*(2045) and predicts sizable forward-peaked production for addition...

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