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Title: | Observation of New Resonances Decaying to J/ψK+ and J/ψϕ |
Authors: | Aaij, Roel Beteta, Carlos Abellan Eydelman, Semen Isaakovich Kharisova, Anastasiya Evgenjevna Panshin, Gennady Leonidovich |
Issue Date: | 2021 |
Publisher: | American Physical Society |
Citation: | Observation of New Resonances Decaying to J/ψK+ and J/ψϕ / R. Aaij, C. A. Beteta, S. I. Eydelman [et al.] // Physical Review Letters. — 2021. — Vol. 127, iss. 8. — [082001, 11 p.]. |
Abstract: | The first observation of exotic states with a new quark content c¯cu¯s decaying to the J/ψK+ final state is reported with high significance from an amplitude analysis of the B+→J/ψϕK+ decay. The analysis is carried out using proton-proton collision data corresponding to a total integrated luminosity of 9 fb−1 collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV. The most significant state, Zcs(4000)+, has a mass of 4003±6+4−14 MeV, a width of 131±15±26 MeV, and spin parity JP=1+, where the quoted uncertainties are statistical and systematic, respectively. A new 1+ X(4685) state decaying to the J/ψϕ final state is also observed with high significance. In addition, the four previously reported J/ψϕ states are confirmed and two more exotic states, Zcs(4220)+ and X(4630), are observed with significance exceeding 5 standard deviations. |
URI: | http://earchive.tpu.ru/handle/11683/72773 |
Appears in Collections: | Репринты научных публикаций |
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