Evidence for a New Structure in the J/psi p and J/psi(p)over-bar Systems in B-s(0) -> J/psi p(p)over-bar Decays

Aaij, R.Ctr Brasileiro Pesquisas Fis CBPF, Rio De Janeiro, Brazil;Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands (författare)

For complete list of authors see http://dx.doi.org/10.1103/PhysRevLett.128.062001
An amplitude analysis of flavor-untagged B-s(0) -> J=psi p (p) over bar decays is performed using a sample of 797 +/- 31 decays reconstructed with the LHCb detector. The data, collected in proton-proton collisions between 2011 and 2018, correspond to an integrated luminosity of 9 fb(-1). Evidence for a new structure in the J=psi p and J=psi(p) over bar systems with a mass of 4337(-4-2)(+7+2) MeV and a width of 29(-12-14)(+26+14) MeV is found, where the first uncertainty is statistical and the second systematic, with a significance in the range of 3.1 to 3.7 sigma, depending on the assigned J(P) hypothesis.

Eklund, LarsUppsala universitet,Kärnfysik,Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark, Scotland(Swepub:uu)laekl677 (författare)
Zunica, G.Univ Manchester, Dept Phys & Astronomy, Manchester, Lancs, England (författare)
Ctr Brasileiro Pesquisas Fis CBPF, Rio De Janeiro, Brazil;Nikhef Natl Inst Subat Phys, Amsterdam, NetherlandsKärnfysik (creator_code:org_t)

Ingår i:Physical Review Letters: American Physical Society128:60031-90071079-7114

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