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Abstract
Using a data sample of proton-proton collisions at ffiffi
s p ¼ 13 TeV, corresponding to an integrated
luminosity of 140 fb−1 collected by the CMS experiment in 2016–2018, the B0
s → Xð3872Þϕ decay is
observed. Decays into J=ψπþπ− and KþK− are used to reconstruct, respectively, the Xð3872Þ and ϕ. The
ratio of the product of branching fractions B½B0
s → Xð3872ÞϕB½Xð3872Þ → J=ψπþπ− to the product
B½B0
s → ψð2SÞϕB½ψð2SÞ → J=ψπþπ− is measured to be ½2.21 0.29ðstatÞ 0.17ðsystÞ%. The ratio
B½B0
s → Xð3872Þϕ=B½B0 → Xð3872ÞK0 is found to be consistent with one, while the ratio
B½B0
s → Xð3872Þϕ=B½Bþ → Xð3872ÞKþ is two times smaller. This suggests a difference in the
production dynamics of the Xð3872Þ in B0 and B0
s meson decays compared to Bþ. The reported
observation may shed new light on the nature of the Xð3872Þ particle.
s p ¼ 13 TeV, corresponding to an integrated
luminosity of 140 fb−1 collected by the CMS experiment in 2016–2018, the B0
s → Xð3872Þϕ decay is
observed. Decays into J=ψπþπ− and KþK− are used to reconstruct, respectively, the Xð3872Þ and ϕ. The
ratio of the product of branching fractions B½B0
s → Xð3872ÞϕB½Xð3872Þ → J=ψπþπ− to the product
B½B0
s → ψð2SÞϕB½ψð2SÞ → J=ψπþπ− is measured to be ½2.21 0.29ðstatÞ 0.17ðsystÞ%. The ratio
B½B0
s → Xð3872Þϕ=B½B0 → Xð3872ÞK0 is found to be consistent with one, while the ratio
B½B0
s → Xð3872Þϕ=B½Bþ → Xð3872ÞKþ is two times smaller. This suggests a difference in the
production dynamics of the Xð3872Þ in B0 and B0
s meson decays compared to Bþ. The reported
observation may shed new light on the nature of the Xð3872Þ particle.
Datum van beschikbaarheid | 12 mei 2020 |
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Uitgever | HEPData |
Format
- Format
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iBOF/23/074: Ontsluiten van de charm-Higgs koppeling bij de LHC
D'Hondt, J., Lowette, S., Van Mechelen, P. & Dobur, D.
1/01/23 → 31/12/26
Project: Fundamenteel
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Onderzoekersoutput
- 1 Article
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Observation of the B-s(0) -> X(3872)phi Decay
Collaboration, CMS., Blekman, F., Bols, E. S., Chhibra, S. S., D'Hondt, J., De Clercq, J., Lontkovskyi, D., Lowette, S., Marchesini, I., Moortgat, S., Morton, A., Python, Q., Tavernier, S., Van Doninck, W. & Van Mulders, P., 7 okt 2020, In: Phys. Rev. Lett.. 125, 15, 18 blz., 152001.Onderzoeksoutput: Article › peer review
Open AccessBestand26 Citaten (Scopus)105 Downloads (Pure)