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dc.contributor.author | LHCb Collaboration |
dc.contributor.author | Adeva Andany, Bernardo |
dc.contributor.author | Borsato, Martino |
dc.contributor.author | Chobanova, Veronika |
dc.contributor.author | Cid Vidal, Xabier |
dc.contributor.author | Dosil Suárez, Álvaro |
dc.contributor.author | Fernández Albor, Víctor Manuel |
dc.contributor.author | Gallas Torreira, Abraham Antonio |
dc.contributor.author | García Pardiñas, Julián |
dc.contributor.author | Hernando Morata, José Ángel |
dc.contributor.author | Lemos Cid, Edgar |
dc.contributor.author | Lucio Martínez, Miriam |
dc.contributor.author | Martínez Santos, Diego |
dc.contributor.author | Plo Casasus, Máximo |
dc.contributor.author | Prisciandaro, Jessica |
dc.contributor.author | Ramos Pernas, Miguel |
dc.contributor.author | Romero Vidal, Antonio |
dc.contributor.author | Saborido Silva, Juan José |
dc.contributor.author | Sanmartín Sedes, Brais |
dc.contributor.author | Santamarina Ríos, Cibrán |
dc.contributor.author | Vázquez Regueiro, Pablo |
dc.contributor.author | Vieites Díaz, María |
dc.contributor.author | Vázquez Sierra, Carlos |
dc.date.accessioned | 2020-05-20T14:10:08Z |
dc.date.available | 2020-05-20T14:10:08Z |
dc.date.issued | 2017 |
dc.identifier.citation | Aaij, 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.issn | 0370-2693 |
dc.identifier.uri | http://hdl.handle.net/10347/22483 |
dc.description.abstract | The 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.iso | eng |
dc.publisher | Elsevier |
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.uri | http://creativecommons.org/licenses/by/4.0/ |
dc.title | Observation of ηc(2S) →pp¯ and search for X(3872) →pp¯ decays |
dc.type | journal article |
dc.identifier.doi | 10.1016/j.physletb.2017.03.046 |
dc.relation.publisherversion | https://doi.org/10.1016/j.physletb.2017.03.046 |
dc.type.hasVersion | VoR |
dc.identifier.essn | 1873-2445 |
dc.rights.accessRights | open access |
dc.contributor.affiliation | Universidade de Santiago de Compostela. Departamento de Física de Partículas |
dc.contributor.affiliation | Universidade de Santiago de Compostela. Instituto Galego de Física de Altas Enerxías (IGFAE) |
dc.description.peerreviewed | SI |
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