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dc.contributor.authorLHCb Collaboration
dc.contributor.authorAdeva Andany, Bernardo
dc.contributor.authorBorsato, Martino
dc.contributor.authorChobanova, Veronika
dc.contributor.authorCid Vidal, Xabier
dc.contributor.authorDosil Suárez, Álvaro
dc.contributor.authorFernández Albor, Víctor Manuel
dc.contributor.authorGallas Torreira, Abraham Antonio
dc.contributor.authorGarcía Pardiñas, Julián
dc.contributor.authorHernando Morata, José Ángel
dc.contributor.authorLemos Cid, Edgar
dc.contributor.authorLucio Martínez, Miriam
dc.contributor.authorMartínez Santos, Diego
dc.contributor.authorPlo Casasus, Máximo
dc.contributor.authorPrisciandaro, Jessica
dc.contributor.authorRamos Pernas, Miguel
dc.contributor.authorRomero Vidal, Antonio
dc.contributor.authorSaborido Silva, Juan José
dc.contributor.authorSanmartín Sedes, Brais
dc.contributor.authorSantamarina Ríos, Cibrán
dc.contributor.authorVázquez Regueiro, Pablo
dc.contributor.authorVieites Díaz, María
dc.contributor.authorVázquez Sierra, Carlos
dc.date.accessioned2020-05-20T14:10:08Z
dc.date.available2020-05-20T14:10:08Z
dc.date.issued2017
dc.identifier.citationAaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albrecht, J., ... & Cartelle, P. A. (2017). Observation of ηc(2S) →pp¯ and search for X(3872) →pp¯ decays. Physics Letters B, 769, 305-313
dc.identifier.issn0370-2693
dc.identifier.urihttp://hdl.handle.net/10347/22483
dc.description.abstractThe first observation of the decay ηc(2S) →pp¯ pis reported using proton–proton collision data corre-sponding to an integrated luminosity of 3.0fb−1recorded by the LHCb experiment at centre-of-mass energies of7 and 8TeV. The ηc(2S)resonance is produced in the decay B+→[c¯ c]K+. The product of branching fractions normalised to that for the J/ψintermediate state, Rηc(2S), is measured to be Rηc (2S) ≡ B(B+→ηc(2S)K+ )×B(ηc(2S)→ p¯p ) B(B+→ J/ψ K+)×B( J/ψ → p¯p ) = (1.58±0.33±0.09)×10−2, where the first uncertainty is statistical and the second systematic. No signals for the decays B+→X(3872)(→p¯ p)K+and B+→ψ(3770)(→p¯ p)K+are seen, and the 95% confidence level upper limits on their relative branching ratios are found to be RX(3872)<0.25 ×10−2and Rψ(3770)<0.10. In addition, the mass differences between the ηc(1S)and the J/ψstates, between the ηc(2S)and the ψ(2S)states, and the natural width of the ηc(1S)are measured as M J/ψ − Mηc (1S) = 110.2±0.5 ±0.9MeV, Mψ(2S) − Mηc (2S) = 52.5±1.7±0.6MeV, ηc (1S) = 34.0±1.9±1.3MeV.
dc.language.isoeng
dc.publisherElsevier
dc.rights©2017 Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleObservation of ηc(2S) →pp¯ and search for X(3872) →pp¯ decays
dc.typejournal article
dc.identifier.doi10.1016/j.physletb.2017.03.046
dc.relation.publisherversionhttps://doi.org/10.1016/j.physletb.2017.03.046
dc.type.hasVersionVoR
dc.identifier.essn1873-2445
dc.rights.accessRightsopen access
dc.contributor.affiliationUniversidade de Santiago de Compostela. Departamento de Física de Partículas
dc.contributor.affiliationUniversidade de Santiago de Compostela. Instituto Galego de Física de Altas Enerxías (IGFAE)
dc.description.peerreviewedSI


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©2017 Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
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 ©2017 Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.





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