Search for 𝑃𝑐⁢𝑐‾𝑠⁢(4459)⁰ and 𝑃𝑐⁢𝑐‾𝑠⁢(4338)⁰ in ϒ⁡(1⁢𝑆,2⁢𝑆) Inclusive Decays at Belle

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dc.contributor.authorAdachi, I.
dc.contributor.authorAggarwal, L.
dc.contributor.authorAhmed, H.
dc.contributor.authorAhn, J.K.
dc.contributor.authorAihara, H.
dc.contributor.authorAkopov, N.
dc.contributor.authorAlhakami, M.
dc.contributor.authorAloisio, A.
dc.contributor.authorAlthubiti, N.
dc.contributor.authorAsner, D.M.
dc.contributor.authorAtmacan, H.
dc.contributor.authorAushev, V.
dc.contributor.authorAversano, M.
dc.contributor.authorAyad, R.
dc.contributor.authorBabu, V.
dc.contributor.authorBae, H.
dc.contributor.authorBaghel, N.K.
dc.contributor.authorBahinipati, S.
dc.contributor.authorBambade, P.
dc.contributor.authorBanerjee, S.
dc.contributor.authoret al.
dc.date.issued2025
dc.description.abstractUsing data samples of 102 million ϒ(1S) events and 158 million ϒ(2S) events collected by the Belle detector at the KEKB asymmetric-energy e⁺e⁻ collider, we search for [udsc¯c] pentaquark states decaying to J/ψΛ. Using the first observations of ϒ(1S; 2S) inclusive decays to J/ψΛ, we find evidence of the Pc¯cs(4459)⁰ state with a local significance of 3.3 standard deviations, including statistical and systematic uncertainties. We measure the mass and width of the Pc¯cs(4459)⁰ to be (4471.7 ± 4.8 ± 0.6) MeV/c² and (22 ± 13 ± 3) MeV, respectively. The branching fractions for Pc¯cs(4459)⁰ production are measured to be B[ϒ(1S)→Pcc¯s(4459)⁰/P¯cc¯s(4459)⁰ + anything] = (3.5 ± 2.0 ± 0.2) ×10⁻⁶ and B[ϒ(2S) → Pc¯cs(4459)⁰/ P¯c¯cs(4459)⁰ + anything] = (2.9 ± 1.7 ± 0.4) × 10⁻⁶. The inclusive branching fractions of ϒ(1S; 2S) → J/ψΛ/Λ¯ are measured to be B[ϒ(1S) → J/ψΛ/Λ¯ + anything] = (36.9 ± 5.3 ± 2.4) × 10⁻⁶ and B[ϒ(2S) → J/ψΛ/Λ¯ + anything] = (22.3 ± 5.7 ± 3.1) × 10⁻⁶. We measure the visible cross section σ(e⁺e⁻ → J/ψΛ/Λ¯ + anything) = (90 ± 14 ± 6) fb for the continuum production at √s = 10.52 GeV. In all cases, the first uncertainties are statistical and the second are systematic.
dc.description.statementofresponsibilityThe Belle and Belle II Collaborations
dc.identifier.citationPhysical Review Letters, 2025; 135(4):041901-1-041901-9
dc.identifier.doi10.1103/pf8m-6j69
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.orcidDe La Motte, S.A. [0000-0003-3905-6805]
dc.identifier.orcidHarris, C. [0000-0003-0448-4244]
dc.identifier.orcidJackson, P. [0000-0002-0847-402X]
dc.identifier.urihttps://hdl.handle.net/2440/147967
dc.language.isoen
dc.publisherAmerican Physical Society
dc.relation.granthttp://purl.org/au-research/grants/arc/DP200101792
dc.relation.granthttp://purl.org/au-research/grants/arc/DP210101900
dc.relation.granthttp://purl.org/au-research/grants/arc/DP210102831
dc.relation.granthttp://purl.org/au-research/grants/arc/DE220100462
dc.relation.granthttp://purl.org/au-research/grants/arc/LE210100098
dc.relation.granthttp://purl.org/au-research/grants/arc/LE230100085
dc.rightsPublished by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3
dc.source.urihttps://doi.org/10.1103/pf8m-6j69
dc.subjectBranching fraction; Hadron production; Hadronic decays; Multiquark bound states; Quark model
dc.titleSearch for 𝑃𝑐⁢𝑐‾𝑠⁢(4459)⁰ and 𝑃𝑐⁢𝑐‾𝑠⁢(4338)⁰ in ϒ⁡(1⁢𝑆,2⁢𝑆) Inclusive Decays at Belle
dc.title.alternativeSearch for 𝑃(𝑐⁢𝑐) overline (𝑠)⁢(4459)(0) and 𝑃(𝑐⁢𝑐) overline (𝑠⁢)(4338)(0) in upsilon ⁡(1⁢𝑆,2⁢𝑆) Inclusive Decays at Belle
dc.typeJournal article
pubs.publication-statusPublished online

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