Observation of a threshold cusp at the Λη threshold in the pK- mass spectrum with Λc+ → pK- π+ decays

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dc.contributor.authorYang, S. B.en
dc.contributor.authorTanida, K.en
dc.contributor.authorAhn, J. K.en
dc.contributor.authorAdachi, I.en
dc.contributor.authorAihara, H.en
dc.contributor.authorAsner, D. M.en
dc.contributor.authorAtmacan, H.en
dc.contributor.authorAulchenko, V.en
dc.contributor.authorAushev, T.en
dc.contributor.authorAyad, R.en
dc.contributor.authorBabu, V.en
dc.contributor.authorBehera, P.en
dc.contributor.authorBelous, K.en
dc.contributor.authorBennett, J.en
dc.contributor.authorBessner, M.en
dc.contributor.authorBhardwaj, V.en
dc.contributor.authorBhuyan, B.en
dc.contributor.authorBodrov, D.en
dc.contributor.authorBorah, J.en
dc.contributor.authorBozek, A.en
dc.contributor.authorBranchini, P.en
dc.contributor.authorBrowder, T. E.en
dc.contributor.authorBudano, A.en
dc.contributor.authorCampajola, M.en
dc.contributor.authorCervenkov, D.en
dc.contributor.authorChang, M. -C.en
dc.contributor.authorChang, P.en
dc.contributor.authorCheon, B. G.en
dc.contributor.authorChilikin, K.en
dc.contributor.authorCho, E.en
dc.contributor.authorCho, K.en
dc.contributor.authorCho, S. -J.en
dc.contributor.authorChoi, S. -K.en
dc.contributor.authorChoi, Y.en
dc.contributor.authorChoudhury, S.en
dc.contributor.authorCinabro, D.en
dc.contributor.authorDas, S.en
dc.contributor.authorDe Pietro, G.en
dc.contributor.authorDhamija, R.en
dc.contributor.authorDi Capua, F.en
dc.contributor.authorDolezal, Z.en
dc.contributor.authorDong, T.en
dc.contributor.authorDossett, D.en
dc.contributor.authorEpifanov, D.en
dc.contributor.authorFulsom, B. G.en
dc.contributor.authorGarg, R.en
dc.contributor.authorGaur, V.en
dc.contributor.authorGarmash, A.en
dc.contributor.authorGiri, A.en
dc.contributor.authorGoldenzweig, P.en
dc.contributor.authorGraziani, E.en
dc.contributor.authorGu, T.en
dc.contributor.authorGuan, Y.en
dc.contributor.authorGudkova, K.en
dc.contributor.authorHadjivasiliou, C.en
dc.contributor.authorHayasaka, K.en
dc.contributor.authorHayashii, H.en
dc.contributor.authorHou, W. -S.en
dc.contributor.authorHsu, C. -L.en
dc.contributor.authorIijima, T.en
dc.contributor.authorInami, K.en
dc.contributor.authorIpsita, N.en
dc.contributor.authorIshikawa, A.en
dc.contributor.authorItoh, R.en
dc.contributor.authorIwasaki, M.en
dc.contributor.authorIwasaki, Y.en
dc.contributor.authorJacobs, W. W.en
dc.contributor.authorJang, E. -J.en
dc.contributor.authorJi, Q. P.en
dc.contributor.authorJia, S.en
dc.contributor.authorJin, Y.en
dc.contributor.authorJoo, K. K.en
dc.contributor.authorKang, K. H.en
dc.contributor.authorKaryan, G.en
dc.contributor.authorKawasaki, T.en
dc.contributor.authorKichimi, H.en
dc.contributor.authorKiesling, C.en
dc.contributor.authorKim, C. H.en
dc.contributor.authorKim, D. Y.en
dc.contributor.authorKim, K. -H.en
dc.contributor.authorKim, Y. J.en
dc.contributor.authorKim, Y. -K.en
dc.contributor.authorKindo, H.en
dc.contributor.authorKodys, P.en
dc.contributor.authorKonno, T.en
dc.contributor.authorKorobov, A.en
dc.contributor.authorKorpar, S.en
dc.contributor.authorKovalenko, E.en
dc.contributor.authorKrizan, P.en
dc.contributor.authorKrokovny, P.en
dc.contributor.authorKumar, M.en
dc.contributor.authorKumar, R.en
dc.contributor.authorKumara, K.en
dc.contributor.authorKwon, Y. -J.en
dc.contributor.authorLam, T.en
dc.contributor.authorLange, J. S.en
dc.contributor.authorLaurenza, M.en
dc.contributor.authorLee, J. Y.en
dc.contributor.authorLee, S. C.en
dc.contributor.authorLi, C. H.en
dc.contributor.authorLi, J.en
dc.contributor.authorLi, L. K.en
dc.contributor.authorLi, Y.en
dc.contributor.authorGioi, L. Lien
dc.contributor.authorLibby, J.en
dc.contributor.authorLieret, K.en
dc.contributor.authorLiventsev, D.en
dc.contributor.authorLuo, T.en
dc.contributor.authorMasuda, M.en
dc.contributor.authorMatsuda, T.en
dc.contributor.authorMatvienko, D.en
dc.contributor.authorMaurya, S. K.en
dc.contributor.authorMeier, F.en
dc.contributor.authorMerola, M.en
dc.contributor.authorMetzner, F.en
dc.contributor.authorMiyabayashi, K.en
dc.contributor.authorMizuk, R.en
dc.contributor.authorMohanty, G. B.en
dc.contributor.authorNakamura, I.en
dc.contributor.authorNakano, T.en
dc.contributor.authorNakao, M.en
dc.contributor.authorNatkaniec, Z.en
dc.contributor.authorNatochii, A.en
dc.contributor.authorNayak, L.en
dc.contributor.authorNiiyama, M.en
dc.contributor.authorNisar, N. K.en
dc.contributor.authorNishida, S.en
dc.contributor.authorOno, H.en
dc.contributor.authorOskin, P.en
dc.contributor.authorPakhlov, P.en
dc.contributor.authorPakhlova, G.en
dc.contributor.authorPardi, S.en
dc.contributor.authorPark, H.en
dc.contributor.authorPark, S. -H.en
dc.contributor.authorPasseri, A.en
dc.contributor.authorPatra, S.en
dc.contributor.authorPaul, S.en
dc.contributor.authorPedlar, T. K.en
dc.contributor.authorPestotnik, R.en
dc.contributor.authorPiilonen, L. E.en
dc.contributor.authorPodobnik, T.en
dc.contributor.authorPrencipe, E.en
dc.contributor.authorPrim, M. T.en
dc.contributor.authorRout, N.en
dc.contributor.authorRusso, G.en
dc.contributor.authorSandilya, S.en
dc.contributor.authorSantelj, L.en
dc.contributor.authorSavinov, V.en
dc.contributor.authorSchnell, G.en
dc.contributor.authorSchueler, J.en
dc.contributor.authorSchwanda, C.en
dc.contributor.authorSeino, Y.en
dc.contributor.authorSenyo, K.en
dc.contributor.authorSevior, M. E.en
dc.contributor.authorShapkin, M.en
dc.contributor.authorSharma, C.en
dc.contributor.authorShen, C. P.en
dc.contributor.authorShiu, J. -G.en
dc.contributor.authorSingh, J. B.en
dc.contributor.authorSokolov, A.en
dc.contributor.authorSolovieva, E.en
dc.contributor.authorStaric, M.en
dc.contributor.authorSumihama, M.en
dc.contributor.authorSumiyoshi, T.en
dc.contributor.authorSutcliffe, W.en
dc.contributor.authorTakizawa, M.en
dc.contributor.authorTamponi, U.en
dc.contributor.authorTenchini, F.en
dc.contributor.authorTrabelsi, K.en
dc.contributor.authorTsuboyama, T.en
dc.contributor.authorUchida, M.en
dc.contributor.authorUglov, T.en
dc.contributor.authorUnno, Y.en
dc.contributor.authorUno, S.en
dc.contributor.authorUshiroda, Y.en
dc.contributor.authorUsov, Y.en
dc.contributor.authorvan Tonder, R.en
dc.contributor.authorVarner, G.en
dc.contributor.authorVossen, A.en
dc.contributor.authorWaheed, E.en
dc.contributor.authorWang, E.en
dc.contributor.authorWang, M. -Z.en
dc.contributor.authorWang, X. L.en
dc.contributor.authorWatanabe, M.en
dc.contributor.authorWatanuki, S.en
dc.contributor.authorWerbycka, O.en
dc.contributor.authorWon, E.en
dc.contributor.authorYabsley, B. D.en
dc.contributor.authorYan, W.en
dc.contributor.authorYelton, J.en
dc.contributor.authorYin, J. H.en
dc.contributor.authorYuan, C. Z.en
dc.contributor.authorYusa, Y.en
dc.contributor.authorZhai, Y.en
dc.contributor.authorZhang, Z. P.en
dc.contributor.authorZhilich, V.en
dc.contributor.authorZhukova, V.en
dc.date.accessioned2023-12-08T18:19:20Zen
dc.date.available2023-12-08T18:19:20Zen
dc.date.issued2023-08-16en
dc.date.issued2023-08-16en
dc.description.abstractWe observe a narrow peaking structure in the pK- invariant-mass spectrum near the Λη threshold. The peak is clearly seen in 1.5 million events of Λc+→pK-π+ decay using the 980 fb-1 data sample collected by the Belle detector at the KEKB asymmetric-energy e+e- collider. We try two approaches to explain this structure: as a new resonance and as a cusp at the Λη threshold. The best fit is obtained with a coherent sum of a Flatté function and a constant background amplitude with the reduced χ2 of 257/243 (p=0.25), while the fits to Breit-Wigner functions are unfavored by more than 7σ. The best fit explains the structure as a cusp at the Λη threshold, and the obtained parameters are consistent with the known properties of Λ(1670). The observation gives the first identification of a threshold cusp in hadrons from the spectrum shape.en
dc.description.versionPublished versionen
dc.format.extent6 page(s)en
dc.format.mimetypeapplication/pdfen
dc.identifierARTN L031104 (Article number)en
dc.identifier.doihttps://doi.org/10.1103/PhysRevD.108.L031104en
dc.identifier.eissn2470-0029en
dc.identifier.issn2470-0010en
dc.identifier.issue3en
dc.identifier.orcidPiilonen, Leo [0000-0001-6836-0748]en
dc.identifier.urihttps://hdl.handle.net/10919/117142en
dc.identifier.volume108en
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urihttp://dx.doi.org/10.1103/physrevd.108.l031104en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectScience & Technologyen
dc.subjectPhysical Sciencesen
dc.subjectAstronomy & Astrophysicsen
dc.subjectPhysics, Particles & Fieldsen
dc.subjectPhysicsen
dc.subject5106 Nuclear and Plasma Physicsen
dc.subject5107 Particle and High Energy Physicsen
dc.subject51 Physical Sciencesen
dc.titleObservation of a threshold cusp at the Λη threshold in the pK<SUP>-</SUP> mass spectrum with Λ<sub>c</sub><SUP>+</SUP> → pK<SUP>-</SUP> π<SUP>+</SUP> decaysen
dc.title.serialPhysical Review Den
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherArticleen
dc.type.otherJournalen
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Scienceen
pubs.organisational-group/Virginia Tech/Science/Physicsen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Science/COS T&R Facultyen

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