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Observation of ηc(2S) →pp¯ and search for X(3872) →pp¯ decays

Abstract:

The first observation of the decay ηc(2S) → pp is reported using proton–proton collision data corresponding to an integrated luminosity of 3.0fb^−1 recorded by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The ηc(2S)resonance is produced in the decay B+→[cc¯]K+. The product of branching fractions normalised to that for the J/ψ intermediate 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, wher...

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Publication status:
Published
Peer review status:
Peer reviewed

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Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics; Particle Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics; Particle Physics
Role:
Author
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Name:
French National Institute of Nuclear and Particle Physics
Publisher:
Elsevier
Journal:
Physics Letters B More from this journal
Volume:
769
Pages:
305-313
Publication date:
2017-03-01
Acceptance date:
2017-03-23
DOI:
ISSN:
0370-2693
Keywords:
Pubs id:
pubs:636633
UUID:
uuid:d5756134-210e-45da-a45d-7824b5695d66
Local pid:
pubs:636633
Source identifiers:
636633
Deposit date:
2017-11-03

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