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Search for the doubly charmed baryon 𝛯+𝑐𝑐 in the 𝛯+𝑐𝜋−𝜋+ final stateстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Бережной А.В., Белов И.Н., Горелов И.В., Данилина А.В., Лефлат А.К., Никитин Н.В., Саврина Д.В., Волков В.Ю., Жуков В.Ю., LHCb Collaboration
- Журнал: Journal of High Energy Physics
- Том: 2021
- Номер: 12
- Год издания: 2021
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- DOI: 10.1007/jhep12(2021)107
- Аннотация: A search for the doubly charmed baryon 𝛯+𝑐𝑐 is performed in the 𝛯+𝑐𝜋−𝜋+ invariant-mass spectrum, where the 𝛯+𝑐 baryon is reconstructed in the pK−π+ final state. The study uses proton-proton collision data collected with the LHCb detector at a centre- of-mass energy of 13 TeV, corresponding to a total integrated luminosity of 5.4 fb−1. No significant signal is observed in the invariant-mass range of 3.4–3.8 GeV/c2. Upper limits are set on the ratio of branching fractions multiplied by the production cross-section with respect to the 𝛯++𝑐𝑐 → (𝛯+𝑐 → pK−π+)π+ decay for different 𝛯+𝑐𝑐 mass and lifetime hypotheses in the rapidity range from 2.0 to 4.5 and the transverse momentum range from 2.5 to 25 GeV/c. The results from this search are combined with a previously published search for the 𝛯+𝑐𝑐 → 𝛬+𝑐K−π+ decay mode, yielding a maximum local significance of 4.0 standard deviations around the mass of 3620 MeV/c2, including systematic uncertainties. Taking into account the look-elsewhere effect in the 3.5–3.7 GeV/c2 mass window, the combined global significance is 2.9 standard deviations including systematic uncertainties.
- Добавил в систему: Бережной Александр Викторович