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Observation of the decay B-s(0) -> eta(c)phi and evidence for B-s(0) -> eta(c)pi(+)pi(-)

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LHCb Collaboration (Including: Blake, Thomas, Costa Sobral, Cayo, Crocombe, Andrew, Gershon, T. J., Kreps, Michal, Latham, Thomas, Loh, David, Mathad, Abhijit , O'Hanlon, Daniel P., Poluektov, Anton, Qian, W., Wallace, Charlotte and Wicht, Jean). (2017) Observation of the decay B-s(0) -> eta(c)phi and evidence for B-s(0) -> eta(c)pi(+)pi(-). Journal of High Energy Physics, 21 . doi:10.1007/JHEP07(2017)021 ISSN 1029-8479.

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Official URL: https://doi.org/10.1007/JHEP07(2017)021

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Abstract

A study of B s 0  → η c ϕ and B s 0  → η c π + π − decays is performed using pp collision data corresponding to an integrated luminosity of 3.0 fb−1, collected with the LHCb detector in Run 1 of the LHC. The observation of the decay B s 0  → η c ϕ is reported, where the η c meson is reconstructed in the pp¯¯¯pp¯, K + K − π + π −, π + π − π + π − and K + K − K + K − decay modes and the ϕ(1020) in the K + K − decay mode. The decay B s 0  → J/ψϕ is used as a normalisation channel. Evidence is also reported for the decay B s 0  → η c π + π −, where the η c meson is reconstructed in the pp¯¯¯pp¯ decay mode, using the decay B s 0  → J/ψπ + π − as a normalisation channel. The measured branching fractions are
B(B0s→ηcϕ)=(5.01±0.53±0.27±0.63)×10−4,B(B0s→ηcπ+π−)=(1.76±0.59±0.12±0.29)×10−4,
B(Bs0→ηcϕ)=(5.01±0.53±0.27±0.63)×10−4,B(Bs0→ηcπ+π−)=(1.76±0.59±0.12±0.29)×10−4,
where in each case the first uncertainty is statistical, the second systematic and the third uncertainty is due to the limited knowledge of the external branching fractions.

Item Type: Journal Article
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: Journal of High Energy Physics
Publisher: Springer
ISSN: 1029-8479
Official Date: 5 July 2017
Dates:
DateEvent
5 July 2017Published
17 June 2017Accepted
28 February 2017Submitted
Volume: 21
Number of Pages: 32
DOI: 10.1007/JHEP07(2017)021
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)

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