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A search for rare B...
A search for rare B → Dμ+μ− decays
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- Aaij, R. (författare)
- Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands
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- Adlarson, Patrik (författare)
- Uppsala universitet,Kärnfysik
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- Eklund, Lars (författare)
- Uppsala universitet,Kärnfysik
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- Kupsc, Andrzej (författare)
- Uppsala universitet,Kärnfysik
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- Zunica, G. (författare)
- Univ Manchester, Dept Phys & Astron, Manchester, Lancs, England
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(creator_code:org_t)
- Springer, 2024
- 2024
- Engelska.
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Ingår i: Journal of High Energy Physics (JHEP). - : Springer. - 1126-6708 .- 1029-8479. ; 2024:2
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- A search for rare B → Dμ+μ− decays is performed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. No significant signals are observed in the non-resonant μ+μ− modes, and upper limits of B(B0 → D0μ+μ−)< 5.1 × 10−8, B (B+ → D+s μ+μ−) < 3.2 × 10−8, B(B0s → D0μ+μ−)<1.6 × 10−7 and fc/fu · B (B+c → D+s μ+μ−) < 9.6 × 10−8 are set at the 95 % confidencelevel, where fc and fu are the fragmentation fractions of a B meson with a c and u quarkrespectively in proton-proton collisions. Each result is either the first such measurement oran improvement by three orders of magnitude on an existing limit. Separate upper limits arecalculated when the muon pair originates from a J/ψ → μ+μ− decay. The branching fractionof B+c → D+s J/ψ multiplied by the fragmentation-fraction ratio is measured to befc/fu · B(B+c → D+s J/ψ)= (1.63 ± 0.15 ± 0.13) × 10−5,where the first uncertainty is statistical and the second systematic.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Nyckelord
- B Physics
- Flavour Physics
- Hadron-Hadron Scattering
- Rare Decay
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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