317 research outputs found

    Study of the B−→Λc+Λˉc−K−B^{-} \to \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-} K^{-} decay

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    The decay B−→Λc+Λˉc−K−B^{-} \to \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-} K^{-} is studied in proton-proton collisions at a center-of-mass energy of s=13\sqrt{s}=13 TeV using data corresponding to an integrated luminosity of 5 fb−1\mathrm{fb}^{-1} collected by the LHCb experiment. In the Λc+K−\Lambda_{c}^+ K^{-} system, the Ξc(2930)0\Xi_{c}(2930)^{0} state observed at the BaBar and Belle experiments is resolved into two narrower states, Ξc(2923)0\Xi_{c}(2923)^{0} and Ξc(2939)0\Xi_{c}(2939)^{0}, whose masses and widths are measured to be m(Ξc(2923)0)=2924.5±0.4±1.1 MeV,m(Ξc(2939)0)=2938.5±0.9±2.3 MeV,Γ(Ξc(2923)0)=0004.8±0.9±1.5 MeV,Γ(Ξc(2939)0)=0011.0±1.9±7.5 MeV, m(\Xi_{c}(2923)^{0}) = 2924.5 \pm 0.4 \pm 1.1 \,\mathrm{MeV}, \\ m(\Xi_{c}(2939)^{0}) = 2938.5 \pm 0.9 \pm 2.3 \,\mathrm{MeV}, \\ \Gamma(\Xi_{c}(2923)^{0}) = \phantom{000}4.8 \pm 0.9 \pm 1.5 \,\mathrm{MeV},\\ \Gamma(\Xi_{c}(2939)^{0}) = \phantom{00}11.0 \pm 1.9 \pm 7.5 \,\mathrm{MeV}, where the first uncertainties are statistical and the second systematic. The results are consistent with a previous LHCb measurement using a prompt Λc+K−\Lambda_{c}^{+} K^{-} sample. Evidence of a new Ξc(2880)0\Xi_{c}(2880)^{0} state is found with a local significance of 3.8 σ3.8\,\sigma, whose mass and width are measured to be 2881.8±3.1±8.5 MeV2881.8 \pm 3.1 \pm 8.5\,\mathrm{MeV} and 12.4±5.3±5.8 MeV12.4 \pm 5.3 \pm 5.8 \,\mathrm{MeV}, respectively. In addition, evidence of a new decay mode Ξc(2790)0→Λc+K−\Xi_{c}(2790)^{0} \to \Lambda_{c}^{+} K^{-} is found with a significance of 3.7 σ3.7\,\sigma. The relative branching fraction of B−→Λc+Λˉc−K−B^{-} \to \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-} K^{-} with respect to the B−→D+D−K−B^{-} \to D^{+} D^{-} K^{-} decay is measured to be 2.36±0.11±0.22±0.252.36 \pm 0.11 \pm 0.22 \pm 0.25, where the first uncertainty is statistical, the second systematic and the third originates from the branching fractions of charm hadron decays.Comment: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-028.html (LHCb public pages

    Measurement of the ratios of branching fractions R(D∗)\mathcal{R}(D^{*}) and R(D0)\mathcal{R}(D^{0})

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    The ratios of branching fractions R(D∗)≡B(Bˉ→D∗τ−Μˉτ)/B(Bˉ→D∗Ό−ΜˉΌ)\mathcal{R}(D^{*})\equiv\mathcal{B}(\bar{B}\to D^{*}\tau^{-}\bar{\nu}_{\tau})/\mathcal{B}(\bar{B}\to D^{*}\mu^{-}\bar{\nu}_{\mu}) and R(D0)≡B(B−→D0τ−Μˉτ)/B(B−→D0Ό−ΜˉΌ)\mathcal{R}(D^{0})\equiv\mathcal{B}(B^{-}\to D^{0}\tau^{-}\bar{\nu}_{\tau})/\mathcal{B}(B^{-}\to D^{0}\mu^{-}\bar{\nu}_{\mu}) are measured, assuming isospin symmetry, using a sample of proton-proton collision data corresponding to 3.0 fb−1{ }^{-1} of integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The tau lepton is identified in the decay mode τ−→Ό−ΜτΜˉΌ\tau^{-}\to\mu^{-}\nu_{\tau}\bar{\nu}_{\mu}. The measured values are R(D∗)=0.281±0.018±0.024\mathcal{R}(D^{*})=0.281\pm0.018\pm0.024 and R(D0)=0.441±0.060±0.066\mathcal{R}(D^{0})=0.441\pm0.060\pm0.066, where the first uncertainty is statistical and the second is systematic. The correlation between these measurements is ρ=−0.43\rho=-0.43. Results are consistent with the current average of these quantities and are at a combined 1.9 standard deviations from the predictions based on lepton flavor universality in the Standard Model.Comment: All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-039.html (LHCb public pages

    Discutindo a educação ambiental no cotidiano escolar: desenvolvimento de projetos na escola formação inicial e continuada de professores

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    A presente pesquisa buscou discutir como a Educação Ambiental (EA) vem sendo trabalhada, no Ensino Fundamental e como os docentes desta escola compreendem e vem inserindo a EA no cotidiano escolar., em uma escola estadual do município de Tangará da Serra/MT, Brasil. Para tanto, realizou-se entrevistas com os professores que fazem parte de um projeto interdisciplinar de EA na escola pesquisada. Verificou-se que o projeto da escola não vem conseguindo alcançar os objetivos propostos por: desconhecimento do mesmo, pelos professores; formação deficiente dos professores, não entendimento da EA como processo de ensino-aprendizagem, falta de recursos didáticos, planejamento inadequado das atividades. A partir dessa constatação, procurou-se debater a impossibilidade de tratar do tema fora do trabalho interdisciplinar, bem como, e principalmente, a importñncia de um estudo mais aprofundado de EA, vinculando teoria e prática, tanto na formação docente, como em projetos escolares, a fim de fugir do tradicional vínculo “EA e ecologia, lixo e horta”.Facultad de Humanidades y Ciencias de la Educació

    ĐœĐŸŃ€Ń„ĐŸĐ»ĐŸĐłŃ–Ń‡ĐœŃ– Đ·ĐŒŃ–ĐœĐž ĐČ Ń‚ĐșĐ°ĐœĐžĐœĐ°Ń… ŃŃƒĐłĐ»ĐŸĐ±Ń–ĐČ Ńƒ разі пДрĐČĐžĐœĐœĐŸŃ— Ń‚ĐŸŃ„ŃƒŃĐœĐŸŃ— ĐżĐŸĐŽĐ°ĐłŃ€Đž

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    Gout is a chronic disease which is accompanied by a primary violation of the uric  acid (purine) metabolism, increased value of uric acid (hyperuricemia) in blood and urates’ deposition in tissues (crystals of the sodium salt of the uric acid). The incidence of gout is increasing in recent years. Men suffer from this pathology in the USA in 0.84% cases, in the Western Europe from 0.1 to 2 % cases, and in persons over 55 years old is about 6 % ones. Prevalence of gouty arthritis in Ukraine is 64.7 per 100 000 of population.Objective: to clarify the morphological changes in the tissues joints and periarticular structures in patients with primary tophaceous gout course.Methods: morphological study of the surgical specimens taken during surgery for removal of gouty tophi and correction of deformations performed in 32 patients with chronic gout (31 men and 1 woman), aged from 39 to 78 years (mean age - 56,1 ± 3,5 years).Results: during the first 1-3 years of tophi form rarely. Just in case of severe pathological process their formation directly depends on value of uremia. With increasing of the disease structural and functional organization changes of the joint capsule progressed. Necrotic and destructive processes predominated. In severe cases of the clinical course of gout accompanied with high content of uric acid in blood serum, frequent (4-5 times a year) and continuous attacks of gout, which intakes 3 to 4 or more joints, bright distinct degenerative and necrotic changes not just in the joint capsule but also in paraarticular tissues, primarily joint cartilage and subchondral bone came out. They firstly characterized with activation of endochondral ossification or dystrophic and necrotic lesions of the articular cartilage and subchondral bone.Conclusions: gouty arthritis is one of the variants of chronic inflammation, which is determined by the deposition of urates of the uric acid into the joint capsule and characterized by active fibroblastic proliferation of cellular elements with the formation of fibrous connective tissue on early stages, and in cases of severe course it characterized by actively progressing degenerative and destructive lesions of all joint tissues leading to disability. The basis of the inflammatory cell infiltrate is combination of macrophages, lymphocytes, cellular elements of the connective tissue (fibroblasts) and giant cell formation. Defined by us pathomorphologic vicissitude of pathologic changes in the joint tissues allows to clarify the therapeutic approach to tophaceous gout. Direct dependence of the severity of pathological changes in the joint tissues on the severity of the clinical course of gout requires active prevention and reduction of the frequency of exacerbations of the pathologic process.В Ń€Đ°Đ±ĐŸŃ‚Đ” прДЎстаĐČĐ»Đ”ĐœĐŸ ĐżĐ°Ń‚ĐŸĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłĐžŃ‡Đ”ŃĐșĐŸĐ” ĐžŃŃĐ»Đ”ĐŽĐŸĐČĐ°ĐœĐžĐ” ĐŸĐżĐ”Ń€Đ°Ń†ĐžĐŸĐœĐœĐŸĐłĐŸ ĐŒĐ°Ń‚Đ”Ń€ĐžĐ°Đ»Đ°, ĐČĐ·ŃŃ‚ĐŸĐłĐŸ ĐČĐŸ ĐČŃ€Đ”ĐŒŃ Ń…ĐžŃ€ŃƒŃ€ĐłĐžŃ‡Đ”ŃĐșĐŸĐłĐŸ Đ»Đ”Ń‡Đ”ĐœĐžŃ сустаĐČĐŸĐČ ĐČĐ”Ń€Ń…ĐœĐžŃ… Đž ĐœĐžĐ¶ĐœĐžŃ… ĐșĐŸĐœĐ”Ń‡ĐœĐŸŃŃ‚Đ”Đč 32 Đ±ĐŸĐ»ŃŒĐœŃ‹Ń… (31 ĐŒŃƒĐ¶Ń‡ĐžĐœĐ° Đž 1Â Đ¶Đ”ĐœŃ‰ĐžĐœĐ°), страЮающох пДрĐČĐžŃ‡ĐœĐŸĐč Ń‚ĐŸŃ„ŃƒŃĐœĐŸĐč ĐżĐŸĐŽĐ°ĐłŃ€ĐŸĐč, ŃŃ€Đ”ĐŽĐœĐžĐč ĐČĐŸĐ·Ń€Đ°ŃŃ‚ 56,1 лДт. В Ń€Đ”Đ·ŃƒĐ»ŃŒŃ‚Đ°Ń‚Đ” ĐČпДрĐČŃ‹Đ” ŃƒŃŃ‚Đ°ĐœĐŸĐČĐ»Đ”ĐœĐ° ĐŽĐžĐœĐ°ĐŒĐžĐșĐ° ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłĐžŃ‡Đ”ŃĐșох ĐžĐ·ĐŒĐ”ĐœĐ”ĐœĐžĐč ĐČ ŃŃƒŃŃ‚Đ°ĐČĐœĐŸĐč ĐșапсулД про ĐżĐŸĐŽĐ°ĐłŃ€Đ”, ŃƒŃ‚ĐŸŃ‡ĐœĐ”ĐœĐ° стаЮоĐčĐœĐŸŃŃ‚ŃŒ разĐČотоя ĐżĐ°Ń‚ĐŸĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłĐžŃ‡Đ”ŃĐșох ĐžĐ·ĐŒĐ”ĐœĐ”ĐœĐžĐč ĐČ Ń‚ĐșĐ°ĐœŃŃ… сустаĐČĐ° Đž ох Đ·Đ°ĐČĐžŃĐžĐŒĐŸŃŃ‚ŃŒ ĐŸŃ‚ Ń‚ŃĐ¶Đ”ŃŃ‚Đž ĐșĐ»ĐžĐœĐžŃ‡Đ”ŃĐșĐŸĐłĐŸ Ń‚Đ”Ń‡Đ”ĐœĐžŃ Đ·Đ°Đ±ĐŸĐ»Đ”ĐČĐ°ĐœĐžŃ. ĐŁĐșĐ°Đ·Đ°ĐœĐŸ ĐœĐ° ĐœĐ”ĐŸĐ±Ń…ĐŸĐŽĐžĐŒĐŸŃŃ‚ŃŒ ĐżŃ€ĐŸŃ„ĐžĐ»Đ°ĐșтоĐșĐž Ń‡Đ°ŃŃ‚ĐŸŃ‚Ń‹ ĐŸĐ±ĐŸŃŃ‚Ń€Đ”ĐœĐžŃ.ĐŁ Ń€ĐŸĐ±ĐŸŃ‚Ń– прДЎстаĐČĐ»Đ”ĐœĐŸ ĐżĐ°Ń‚ĐŸĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłŃ–Ń‡ĐœĐ” ĐŽĐŸŃĐ»Ń–ĐŽĐ¶Đ”ĐœĐœŃ ĐŸĐżĐ”Ń€Đ°Ń†Ń–ĐčĐœĐŸĐłĐŸ ĐŒĐ°Ń‚Đ”Ń€Ń–Đ°Đ»Ńƒ, ĐČĐžĐŽĐ°Đ»Đ”ĐœĐŸĐłĐŸ піЮ час Ń…Ń–Ń€ŃƒŃ€ĐłŃ–Ń‡ĐœĐŸĐłĐŸ ліĐșуĐČĐ°ĐœĐœŃ ŃŃƒĐłĐ»ĐŸĐ±Ń–ĐČ ĐČĐ”Ń€Ń…ĐœŃ–Ń… і ĐœĐžĐ¶ĐœŃ–Ń… ĐșŃ–ĐœŃ†Ń–ĐČĐŸĐș 32 хĐČĐŸŃ€ĐžŃ… (31 Ń‡ĐŸĐ»ĐŸĐČіĐș і 1 Đ¶Ń–ĐœĐșĐ°) Đ· пДрĐČĐžĐœĐœĐŸŃŽ Ń‚ĐŸŃ„ŃƒŃĐœĐŸŃŽ ĐżĐŸĐŽĐ°ĐłŃ€ĐŸŃŽ, ŃĐ”Ń€Đ”ĐŽĐœŃ–Đč ĐČіĐș 56,1 Ń€ĐŸĐșіĐČ. ĐŁ Ń€Đ”Đ·ŃƒĐ»ŃŒŃ‚Đ°Ń‚Ń– ĐČĐżĐ”Ń€ŃˆĐ” ĐČŃŃ‚Đ°ĐœĐŸĐČĐ»Đ”ĐœĐŸ ĐŽĐžĐœĐ°ĐŒŃ–Đșу ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłŃ–Ń‡ĐœĐžŃ… Đ·ĐŒŃ–Đœ у ŃŃƒĐłĐ»ĐŸĐ±ĐŸĐČіĐč ĐșĐ°ĐżŃŃƒĐ»Ń– Đ·Đ° ĐżĐŸĐŽĐ°ĐłŃ€Đž, ŃƒŃ‚ĐŸŃ‡ĐœĐ”ĐœĐŸ стаЮіĐčĐœŃ–ŃŃ‚ŃŒ Ń€ĐŸĐ·ĐČотĐșу ĐżĐ°Ń‚ĐŸĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłŃ–Ń‡ĐœĐžŃ… Đ·ĐŒŃ–Đœ у тĐșĐ°ĐœĐžĐœĐ°Ń… ŃŃƒĐłĐ»ĐŸĐ±Đ° та їх Đ·Đ°Đ»Đ”Đ¶ĐœŃ–ŃŃ‚ŃŒ ĐČіЮ Ń‚ŃĐ¶ĐșĐŸŃŃ‚Ń– ĐșĐ»Ń–ĐœŃ–Ń‡ĐœĐŸĐłĐŸ ĐżĐ”Ń€Đ”Đ±Ń–ĐłŃƒ Đ·Đ°Ń…ĐČĐŸŃ€ŃŽĐČĐ°ĐœĐœŃ. ЗауĐČĐ°Đ¶Đ”ĐœĐŸ ĐœĐ° ĐœĐ”ĐŸĐ±Ń…Ń–ĐŽĐœĐŸŃŃ‚Ń– ĐżŃ€ĐŸŃ„Ń–Đ»Đ°ĐșтоĐșĐž Ń‡Đ°ŃŃ‚ĐŸŃ‚Đž Đ·Đ°ĐłĐŸŃŃ‚Ń€Đ”ĐœŃŒ

    ĐŸĐ°Ń‚ĐŸĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłŃ–Ń ŃƒŃ€Đ°Đ¶Đ”ĐœĐœŃ ĐłĐŸĐ»ĐŸĐČĐșĐž ŃŃ‚Đ”ĐłĐœĐŸĐČĐŸŃ— ĐșістĐșĐž та ĐŽĐ”ŃĐșі ĐșĐ»Ń–ĐœŃ–ĐșĐŸ-ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłŃ–Ń‡ĐœŃ– Đ·Đ°Đ»Đ”Đ¶ĐœĐŸŃŃ‚Ń– у хĐČĐŸŃ€ĐžŃ… ĐœĐ° ĐŽĐžŃĐżĐ»Đ°ŃŃ‚ĐžŃ‡ĐœĐžĐč ĐșĐŸĐșŃĐ°Ń€Ń‚Ń€ĐŸĐ·

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    Quantitative morphological changes in the tissues of the proximal epimetaphysis of the femur with dysplastic coxarthrosis may differ from those observed in the hip joint in other diseases.Objective: based on the study of the pathohistological characteristics of the femoral head tissue and some frequency differences between them, establish correlation dependencies between clinical and morphological parameters in dysplastic coxarthrosis patients.Methods: we studied femoral head tissue in 22 patients. Clinical parameters were taken into account — the age of patients, the duration of the disease, the intensity of the pain syndrome according to the visual analogue scale. Based on the detected pathohistological changes in the tissues of the femoral head, several morphological gradation indices were taken into account, which diversify the degree of severity of dystrophic-destructive changes.Results: in the complex of pathomorphological changes in femoral head, the most significant are: deformation of the articular surface, degeneration and destruction of articular cartilage, bone-cartilaginous growths, pathology of subchondral spongiosis tissue. They occur with different frequencies and in some cases are combined at different degrees of severity. Between the individual clinical manifestations and morphological indices of the condition of the femoral head tissues, correlation dependencies are established, which should be taken into account when predicting the degree of hip joint lesion in dysplastic coxarthrosis.Conclusions: the revealed morphological features and clinical and morphological dependencies are important for planning the fixation of the femoral component of the endoprosthesis in the case of hip replacement in patients with dysplastic coxarthrosis of different time of presentation, the type of displacement of femoral head by Crowe and the degree of disruption of joint function.ĐšĐŸĐ»ĐžŃ‡Đ”ŃŃ‚ĐČĐ”ĐœĐœĐŸ-ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłĐžŃ‡Đ”ŃĐșОД ĐžĐ·ĐŒĐ”ĐœĐ”ĐœĐžŃ тĐșĐ°ĐœĐ”Đč ĐżŃ€ĐŸĐșŃĐžĐŒĐ°Đ»ŃŒĐœĐŸĐłĐŸ ŃĐżĐžĐŒĐ”Ń‚Đ°Ń„ĐžĐ·Đ° Đ±Đ”ĐŽŃ€Đ”ĐœĐœĐŸĐč ĐșĐŸŃŃ‚Đž про ЎОспластОчДсĐșĐŸĐŒ ĐșĐŸĐșŃĐ°Ń€Ń‚Ń€ĐŸĐ·Đ” (ДКА) ĐŒĐŸĐłŃƒŃ‚ ĐŸŃ‚Đ»ĐžŃ‡Đ°Ń‚ŃŒŃŃ ĐŸŃ‚ ĐœĐ°Đ±Đ»ŃŽĐŽĐ°Đ”ĐŒŃ‹Ń… ĐČ Ń‚Đ°Đ·ĐŸĐ±Đ”ĐŽŃ€Đ”ĐœĐœĐŸĐŒ сустаĐČĐ” про Юругох Đ·Đ°Đ±ĐŸĐ»Đ”ĐČĐ°ĐœĐžŃŃ….ĐŠĐ”Đ»ŃŒ: ĐœĐ° ĐŸŃĐœĐŸĐČĐ” ĐžĐ·ŃƒŃ‡Đ”ĐœĐžŃ ĐżĐ°Ń‚ĐŸĐłĐžŃŃ‚ĐŸĐ»ĐŸĐłĐžŃ‡Đ”ŃĐșох хараĐșтДрОстОĐș тĐșĐ°ĐœĐ”Đč ĐłĐŸĐ»ĐŸĐČĐșĐž Đ±Đ”ĐŽŃ€Đ”ĐœĐœĐŸĐč ĐșĐŸŃŃ‚Đž (ГБК) Đž ĐœĐ”ĐșĐŸŃ‚ĐŸŃ€Ń‹Ń… Ń‡Đ°ŃŃ‚ĐŸŃ‚ĐœŃ‹Ń… ĐŸŃ‚Đ»ĐžŃ‡ĐžĐč ĐŒĐ”Đ¶ĐŽŃƒ ĐœĐžĐŒĐž ŃƒŃŃ‚Đ°ĐœĐŸĐČоть ĐșĐŸŃ€Ń€Đ”Đ»ŃŃ†ĐžĐŸĐœĐœŃ‹Đ” Đ·Đ°ĐČĐžŃĐžĐŒĐŸŃŃ‚Đž ĐŒĐ”Đ¶ĐŽŃƒ ĐșĐ»ĐžĐœĐžŃ‡Đ”ŃĐșĐžĐŒĐž Đž ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłĐžŃ‡Đ”ŃĐșĐžĐŒĐž ĐżĐŸĐșĐ°Đ·Đ°Ń‚Đ”Đ»ŃĐŒĐž у Đ±ĐŸĐ»ŃŒĐœŃ‹Ń… ДКА.ĐœĐ”Ń‚ĐŸĐŽŃ‹: ĐŒĐ°Ń‚Đ”Ń€ĐžĐ°Đ»ĐŸĐŒ ĐžŃŃĐ»Đ”ĐŽĐŸĐČĐ°ĐœĐžŃ ĐżĐŸŃĐ»ŃƒĐ¶ĐžĐ»Đž тĐșĐ°ĐœĐž ГБК 22 Đ±ĐŸĐ»ŃŒĐœŃ‹Ń…. УчотыĐČалО ĐșĐ»ĐžĐœĐžŃ‡Đ”ŃĐșОД ĐżĐŸĐșазатДлО — ĐČĐŸĐ·Ń€Đ°ŃŃ‚ ĐżĐ°Ń†ĐžĐ”ĐœŃ‚ĐŸĐČ, ĐŽĐ°ĐČĐœĐŸŃŃ‚ŃŒ Đ·Đ°Đ±ĐŸĐ»Đ”ĐČĐ°ĐœĐžŃ, ĐžĐœŃ‚Đ”ĐœŃĐžĐČĐœĐŸŃŃ‚ŃŒ Đ±ĐŸĐ»Đ”ĐČĐŸĐłĐŸ ŃĐžĐœĐŽŃ€ĐŸĐŒĐ° ĐżĐŸ ĐČĐžĐ·ŃƒĐ°Đ»ŃŒĐœĐŸ-Đ°ĐœĐ°Đ»ĐŸĐłĐŸĐČĐŸĐč шĐșалД. На ĐŸŃĐœĐŸĐČĐ” ĐŸĐ±ĐœĐ°Ń€ŃƒĐ¶Đ”ĐœĐœŃ‹Ń… ĐżĐ°Ń‚ĐŸĐłĐžŃŃ‚ĐŸĐ»ĐŸĐłĐžŃ‡Đ”ŃĐșох ĐžĐ·ĐŒĐ”ĐœĐ”ĐœĐžĐč ĐČ Ń‚ĐșĐ°ĐœŃŃ… ГБК ŃƒŃ‡Ń‚Đ”ĐœŃ‹ ĐœĐ”ŃĐșĐŸĐ»ŃŒĐșĐŸ ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłĐžŃ‡Đ”ŃĐșох ĐłŃ€Đ°ĐŽĐ°Ń†ĐžĐŸĐœĐœŃ‹Ń… ĐżĐŸĐșазатДлДĐč, ĐșĐŸŃ‚ĐŸŃ€Ń‹Đ” Ń€Đ°Đ·ĐœĐŸŃŃ‚ĐŸŃ€ĐŸĐœĐœĐ” хараĐșŃ‚Đ”Ń€ĐžĐ·ŃƒŃŽŃ‚ ŃŃ‚Đ”ĐżĐ”ĐœŃŒ ĐČŃ‹Ń€Đ°Đ¶Đ”ĐœĐœĐŸŃŃ‚Đž ĐŽĐžŃŃ‚Ń€ĐŸŃ„ĐžŃ‡Đ”ŃĐșĐž- ĐŽĐ”ŃŃ‚Ń€ŃƒĐșтоĐČĐœŃ‹Ń… ĐžĐ·ĐŒĐ”ĐœĐ”ĐœĐžĐč.Đ Đ”Đ·ŃƒĐ»ŃŒŃ‚Đ°Ń‚Ń‹: ĐČ ĐșĐŸĐŒĐżĐ»Đ”ĐșсД ĐżĐ°Ń‚ĐŸĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłĐžŃ‡Đ”ŃĐșох ĐžĐ·ĐŒĐ”ĐœĐ”ĐœĐžĐč ГБК ĐœĐ°ĐžĐ±ĐŸĐ»Đ”Đ” ŃŃƒŃ‰Đ”ŃŃ‚ĐČĐ”ĐœĐœŃ‹ĐŒĐž прДЎстаĐČĐ»ŃŃŽŃ‚ŃŃ: ĐŽĐ”Ń„ĐŸŃ€ĐŒĐ°Ń†ĐžŃ сустаĐČĐœĐŸĐč ĐżĐŸĐČĐ”Ń€Ń…ĐœĐŸŃŃ‚Đž, ĐŽĐžŃŃ‚Ń€ĐŸŃ„ĐžŃ Đž ĐŽĐ”ŃŃ‚Ń€ŃƒĐșцоя сустаĐČĐœĐŸĐłĐŸ хряща, ĐșĐŸŃŃ‚ĐœĐŸ-Ń…Ń€ŃŃ‰Đ”ĐČŃ‹Đ” Ń€Đ°Đ·Ń€Đ°ŃŃ‚Đ°ĐœĐžŃ, ĐżĐ°Ń‚ĐŸĐ»ĐŸĐłĐžŃ ŃŃƒĐ±Ń…ĐŸĐœĐŽŃ€Đ°Đ»ŃŒĐœĐŸĐč ŃĐżĐŸĐœĐłĐžĐŸĐ·Ń‹. ĐžĐœĐž ĐČŃŃ‚Ń€Đ”Ń‡Đ°ŃŽŃ‚ŃŃ с Ń€Đ°Đ·ĐœĐŸĐč Ń‡Đ°ŃŃ‚ĐŸŃ‚ĐŸĐč Đž ĐČ ĐŸŃ‚ĐŽĐ”Đ»ŃŒĐœŃ‹Ń… ŃĐ»ŃƒŃ‡Đ°ŃŃ… ŃĐŸŃ‡Đ”Ń‚Đ°ŃŽŃ‚ŃŃ про Ń€Đ°Đ·ĐœŃ‹Ń… ŃŃ‚Đ”ĐżĐ”ĐœŃŃ… ĐČŃ‹Ń€Đ°Đ¶Đ”ĐœĐœĐŸŃŃ‚Đž. ĐœĐ”Đ¶ĐŽŃƒ ĐŸŃ‚ĐŽĐ”Đ»ŃŒĐœŃ‹ĐŒĐž ĐșĐ»ĐžĐœĐžŃ‡Đ”ŃĐșĐžĐŒĐž ĐżŃ€ĐŸŃĐČĐ»Đ”ĐœĐžŃĐŒĐž Đž ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłĐžŃ‡Đ”ŃĐșĐžĐŒĐž ĐżĐŸĐșĐ°Đ·Đ°Ń‚Đ”Đ»ŃĐŒĐž ŃĐŸŃŃ‚ĐŸŃĐœĐžŃ тĐșĐ°ĐœĐ”Đč ГБК ŃƒŃŃ‚Đ°ĐœĐŸĐČĐ»Đ”ĐœŃ‹ ĐșĐŸŃ€Ń€Đ”Đ»ŃŃ†ĐžĐŸĐœĐœŃ‹Đ” Đ·Đ°ĐČĐžŃĐžĐŒĐŸŃŃ‚Đž, ĐșĐŸŃ‚ĐŸŃ€Ń‹Đ” ŃĐ»Đ”ĐŽŃƒĐ”Ń‚ учотыĐČать про ĐżŃ€ĐŸĐłĐœĐŸĐ·ĐžŃ€ĐŸĐČĐ°ĐœĐžĐž ŃŃ‚Đ”ĐżĐ”ĐœĐž ĐżĐŸŃ€Đ°Đ¶Đ”ĐœĐžŃ тĐșĐ°ĐœĐ”Đč Ń‚Đ°Đ·ĐŸĐ±Đ”ĐŽŃ€Đ”ĐœĐœĐŸĐłĐŸ сустаĐČĐ° про ДКА.ВыĐČĐŸĐŽŃ‹: ĐČыяĐČĐ»Đ”ĐœĐœŃ‹Đ” ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłĐžŃ‡Đ”ŃĐșОД ĐŸŃĐŸĐ±Đ”ĐœĐœĐŸŃŃ‚Đž Đž ĐșĐ»ĐžĐœĐžĐșĐŸ-ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłĐžŃ‡Đ”ŃĐșОД Đ·Đ°ĐČĐžŃĐžĐŒĐŸŃŃ‚Đž ĐžĐŒĐ”ŃŽŃ‚ Đ·ĐœĐ°Ń‡Đ”ĐœĐžĐ” ĐŽĐ»Ń ĐżĐ»Đ°ĐœĐžŃ€ĐŸĐČĐ°ĐœĐžŃ ĐŸŃĐŸĐ±Đ”ĐœĐœĐŸŃŃ‚Đ”Đč фоĐșсацоо Ń„Đ”ĐŒĐŸŃ€Đ°Đ»ŃŒĐœĐŸĐłĐŸ ĐșĐŸĐŒĐżĐŸĐœĐ”ĐœŃ‚Đ° ŃĐœĐŽĐŸĐżŃ€ĐŸŃ‚Đ”Đ·Đ° ĐČ ŃĐ»ŃƒŃ‡Đ°Đ” ĐČŃ‹ĐżĐŸĐ»ĐœĐ”ĐœĐžŃ ŃĐœĐŽĐŸĐżŃ€ĐŸŃ‚Đ”Đ·ĐžŃ€ĐŸĐČĐ°ĐœĐžŃ Ń‚Đ°Đ·ĐŸĐ±Đ”ĐŽŃ€Đ”ĐœĐœĐŸĐłĐŸ сустаĐČĐ° у Đ±ĐŸĐ»ŃŒĐœŃ‹Ń… ДКА Ń€Đ°Đ·ĐœĐŸĐč ĐŽĐ°ĐČĐœĐŸŃŃ‚Đž, топа ŃĐŒĐ”Ń‰Đ”ĐœĐžŃ ГБК ĐżĐŸ Crowe Đž ŃŃ‚Đ”ĐżĐ”ĐœĐž ĐœĐ°Ń€ŃƒŃˆĐ”ĐœĐžŃ Ń„ŃƒĐœĐșцоо сустаĐČĐ°.ĐšŃ–Đ»ŃŒĐșŃ–ŃĐœĐŸ-ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłŃ–Ń‡ĐœŃ– Đ·ĐŒŃ–ĐœĐž тĐșĐ°ĐœĐžĐœ ĐżŃ€ĐŸĐșŃĐžĐŒĐ°Đ»ŃŒĐœĐŸĐłĐŸ Đ”ĐżŃ–ĐŒĐ”Ń‚Đ°Ń„Ń–Đ·Đ° ŃŃ‚Đ”ĐłĐœĐŸĐČĐŸŃ— ĐșістĐșĐž ĐČ Ń€Đ°Đ·Ń– ĐŽĐžŃĐżĐ»Đ°ŃŃ‚ĐžŃ‡ĐœĐŸĐłĐŸ ĐșĐŸĐșŃĐ°Ń€Ń‚Ń€ĐŸĐ·Ńƒ (ДКА) ĐŒĐŸĐ¶ŃƒŃ‚ŃŒ ĐČŃ–ĐŽŃ€Ń–Đ·ĐœŃŃ‚ĐžŃŃ ĐČіЮ ŃĐżĐŸŃŃ‚Đ”Ń€Đ”Đ¶ŃƒĐČĐ°ĐœĐžŃ… у ĐșŃƒĐ»ŃŒŃˆĐŸĐČĐŸĐŒŃƒ ŃŃƒĐłĐ»ĐŸĐ±Ń– Đ·Đ° ŃƒĐŒĐŸĐČ Ń–ĐœŃˆĐžŃ… Đ·Đ°Ń…ĐČĐŸŃ€ŃŽĐČĐ°ĐœŃŒ.ĐœĐ”Ń‚Đ°: ĐœĐ° піЮстаĐČі ĐČĐžĐČŃ‡Đ”ĐœĐœŃ ĐżĐ°Ń‚ĐŸĐłŃ–ŃŃ‚ĐŸĐ»ĐŸĐłŃ–Ń‡ĐœĐžŃ… хараĐșтДрОстОĐș тĐșĐ°ĐœĐžĐœ ĐłĐŸĐ»ĐŸĐČĐșĐž ŃŃ‚Đ”ĐłĐœĐŸĐČĐŸŃ— ĐșістĐșĐž (ГСК) і ĐŽĐ”ŃĐșох Ń‡Đ°ŃŃ‚ĐŸŃ‚ĐœĐžŃ… ĐČŃ–ĐŽĐŒŃ–ĐœĐœĐŸŃŃ‚Đ”Đč ĐŒŃ–Đ¶ ĐœĐžĐŒĐž ĐČŃŃ‚Đ°ĐœĐŸĐČото ĐșĐŸŃ€Đ”Đ»ŃŃ†Ń–ĐčĐœŃ– Đ·Đ°Đ»Đ”Đ¶ĐœĐŸŃŃ‚Ń– ĐŒŃ–Đ¶ ĐșĐ»Ń–ĐœŃ–Ń‡ĐœĐžĐŒĐž та ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłŃ–Ń‡ĐœĐžĐŒĐž ĐżĐŸĐșĐ°Đ·ĐœĐžĐșĐ°ĐŒĐž у хĐČĐŸŃ€ĐžŃ… ĐœĐ° ДКА.ĐœĐ”Ń‚ĐŸĐŽĐž: ĐŒĐ°Ń‚Đ”Ń€Ń–Đ°Đ»ĐŸĐŒ ĐŽĐŸŃĐ»Ń–ĐŽĐ¶Đ”ĐœĐœŃ булО тĐșĐ°ĐœĐžĐœĐž ГСК 22 хĐČĐŸŃ€ĐžŃ…. БралО ĐŽĐŸ уĐČагО ĐșĐ»Ń–ĐœŃ–Ń‡ĐœŃ– ĐżĐŸĐșĐ°Đ·ĐœĐžĐșĐž — ĐČіĐș ĐżĐ°Ń†Ń–Ń”ĐœŃ‚Ń–ĐČ, ĐŽĐ°ĐČĐœŃ–ŃŃ‚ŃŒ Đ·Đ°Ń…ĐČĐŸŃ€ŃŽĐČĐ°ĐœĐœŃ, Ń–ĐœŃ‚Đ”ĐœŃĐžĐČĐœŃ–ŃŃ‚ŃŒ Đ±ĐŸĐ»ŃŒĐŸĐČĐŸĐłĐŸ ŃĐžĐœĐŽŃ€ĐŸĐŒŃƒ Đ·Đ° ĐČŃ–Đ·ŃƒĐ°Đ»ŃŒĐœĐŸ-Đ°ĐœĐ°Đ»ĐŸĐłĐŸĐČĐŸŃŽ шĐșĐ°Đ»ĐŸŃŽ. На піЮстаĐČі ĐČояĐČĐ»Đ”ĐœĐžŃ… ĐżĐ°Ń‚ĐŸĐłŃ–ŃŃ‚ĐŸĐ»ĐŸĐłŃ–Ń‡ĐœĐžŃ… Đ·ĐŒŃ–Đœ у тĐșĐ°ĐœĐžĐœĐ°Ń… ГСК ŃƒŃ€Đ°Ń…ĐŸĐČĐ°ĐœŃ– ĐșŃ–Đ»ŃŒĐșĐ° ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłŃ–Ń‡ĐœĐžŃ… граЮаціĐčĐœĐžĐč ĐżĐŸĐșĐ°Đ·ĐœĐžĐșіĐČ, яĐșі Ń€Ń–Đ·ĐœĐŸĐ±Ń–Ń‡ĐœĐŸ хараĐșŃ‚Đ”Ń€ĐžĐ·ŃƒŃŽŃ‚ŃŒ ŃŃ‚ŃƒĐżŃ–ĐœŃŒ ĐČĐžŃ€Đ°Đ¶Đ”ĐœĐŸŃŃ‚Ń– ĐŽŃ–ŃŃ‚Ń€ĐŸŃ„Ń–Ń‡ĐœĐŸ-ĐŽĐ”ŃŃ‚Ń€ŃƒĐșтоĐČĐœĐžŃ… Đ·ĐŒŃ–Đœ.Đ Đ”Đ·ŃƒĐ»ŃŒŃ‚Đ°Ń‚Đž: у ĐșĐŸĐŒĐżĐ»Đ”Đșсі ĐżĐ°Ń‚ĐŸĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłŃ–Ń‡ĐœĐžŃ… Đ·ĐŒŃ–Đœ ГСК ĐœĐ°ĐčĐ±Ń–Đ»ŃŒŃˆ Ń–ŃŃ‚ĐŸŃ‚ĐœĐžĐŒĐž є: ĐŽĐ”Ń„ĐŸŃ€ĐŒĐ°Ń†Ń–Ń ŃŃƒĐłĐ»ĐŸĐ±ĐŸĐČĐŸŃ— ĐżĐŸĐČĐ”Ń€Ń…ĐœŃ–, ĐŽĐžŃŃ‚Ń€ĐŸŃ„Ń–Ń і ĐŽĐ”ŃŃ‚Ń€ŃƒĐșція ŃŃƒĐłĐ»ĐŸĐ±ĐŸĐČĐŸĐłĐŸ хряща, ĐșістĐșĐŸĐČĐŸ-Ń…Ń€ŃŃ‰ĐŸĐČі Ń€ĐŸĐ·Ń€ĐŸŃŃ‚Đ°ĐœĐœŃ, ĐżĐ°Ń‚ĐŸĐ»ĐŸĐłŃ–Ń ŃŃƒĐ±Ń…ĐŸĐœĐŽŃ€Đ°Đ»ŃŒĐœĐŸŃ— ŃĐżĐŸĐœĐłŃ–ĐŸĐ·Đž. Đ’ĐŸĐœĐž Ń‚Ń€Đ°ĐżĐ»ŃŃŽŃ‚ŃŒŃŃ Đ· Ń€Ń–Đ·ĐœĐŸŃŽ Ń‡Đ°ŃŃ‚ĐŸŃ‚ĐŸŃŽ і ĐČ ĐŸĐșŃ€Đ”ĐŒĐžŃ… ĐČОпаЎĐșах ĐżĐŸŃ”ĐŽĐœŃƒŃŽŃ‚ŃŒŃŃ Đ·Đ° Ń€Ń–Đ·ĐœĐžŃ… ŃŃ‚ŃƒĐżĐ”ĐœŃ–ĐČ ĐČĐžŃ€Đ°Đ¶Đ”ĐœĐŸŃŃ‚Ń–. ĐœŃ–Đ¶ ĐŸĐșŃ€Đ”ĐŒĐžĐŒĐž ĐșĐ»Ń–ĐœŃ–Ń‡ĐœĐžĐŒĐž ĐżŃ€ĐŸŃĐČĐ°ĐŒĐž та ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłŃ–Ń‡ĐœĐžĐŒĐž ĐżĐŸĐșĐ°Đ·ĐœĐžĐșĐ°ĐŒĐž ŃŃ‚Đ°ĐœŃƒ тĐșĐ°ĐœĐžĐœ ГСК ĐČŃŃ‚Đ°ĐœĐŸĐČĐ»Đ”ĐœĐŸ ĐșĐŸŃ€Đ”Đ»ŃŃ†Ń–ĐčĐœŃ– Đ·Đ°Đ»Đ”Đ¶ĐœĐŸŃŃ‚Ń–, яĐșі сліЎ ŃƒŃ€Đ°Ń…ĐŸĐČуĐČато піЮ час ĐżŃ€ĐŸĐłĐœĐŸĐ·ŃƒĐČĐ°ĐœĐœŃ ŃŃ‚ŃƒĐżĐ”ĐœŃ ŃƒŃ€Đ°Đ¶Đ”ĐœĐœŃ тĐșĐ°ĐœĐžĐœ ĐșŃƒĐ»ŃŒŃˆĐŸĐČĐŸĐłĐŸ ŃŃƒĐłĐ»ĐŸĐ±Đ° Đ·Đ° ДКА.Đ’ĐžŃĐœĐŸĐČĐșĐž: ĐČояĐČĐ»Đ”ĐœŃ– ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłŃ–Ń‡ĐœŃ– ĐŸŃĐŸĐ±Đ»ĐžĐČĐŸŃŃ‚Ń– та ĐșĐ»Ń–ĐœŃ–ĐșĐŸ-ĐŒĐŸŃ€Ń„ĐŸĐ»ĐŸĐłŃ–Ń‡ĐœŃ– Đ·Đ°Đ»Đ”Đ¶ĐœĐŸŃŃ‚Ń– ĐŒĐ°ŃŽŃ‚ŃŒ Đ·ĐœĐ°Ń‡Đ”ĐœĐœŃ ĐŽĐ»Ń ĐżĐ»Đ°ĐœŃƒĐČĐ°ĐœĐœŃ ĐŸŃĐŸĐ±Đ»ĐžĐČĐŸŃŃ‚Đ”Đč фіĐșсації Ń„Đ”ĐŒĐŸŃ€Đ°Đ»ŃŒĐœĐŸĐłĐŸ ĐșĐŸĐŒĐżĐŸĐœĐ”ĐœŃ‚Đ° Đ”ĐœĐŽĐŸĐżŃ€ĐŸŃ‚Đ”Đ·Đ° ĐČ Ń€Đ°Đ·Ń– ĐČĐžĐșĐŸĐœĐ°ĐœĐœŃ Đ”ĐœĐŽĐŸĐżŃ€ĐŸŃ‚Đ”Đ·ŃƒĐČĐ°ĐœĐœŃ ĐșŃƒĐ»ŃŒŃˆĐŸĐČĐŸĐłĐŸ ŃŃƒĐłĐ»ĐŸĐ±Đ° у хĐČĐŸŃ€ĐžŃ… ĐœĐ° ДКА Ń€Ń–Đ·ĐœĐŸŃ— ĐŽĐ°ĐČĐœĐŸŃŃ‚Ń–, топу Đ·ĐŒŃ–Ń‰Đ”ĐœĐœŃ ГСК Đ·Đ° Crowe і ŃŃ‚ŃƒĐżĐ”ĐœŃ ĐżĐŸŃ€ŃƒŃˆĐ”ĐœĐœŃ Ń„ŃƒĐœĐșції ŃŃƒĐłĐ»ĐŸĐ±Đ°

    Measurement of prompt D+D^+ and Ds+D^+_{s} production in pPbp\mathrm{Pb} collisions at sNN=5.02 \sqrt {s_{\mathrm{NN}}}=5.02\,TeV

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    International audienceThe production of prompt D+D^+ and Ds+D^+_{s} mesons is studied in proton-lead collisions at a centre-of-mass energy of sNN=5.02 \sqrt {s_{\mathrm{NN}}}=5.02\,TeV. The data sample corresponding to an integrated luminosity of (1.58±0.02)nb−1(1.58\pm0.02)\mathrm{nb}^{-1} is collected by the LHCb experiment at the LHC. The differential production cross-sections are measured using D+D^+ and Ds+D^+_{s} candidates with transverse momentum in the range of 0<pT<14 GeV/c0<p_{\mathrm{T}} <14\,\mathrm{GeV}/c and rapidities in the ranges of 1.5<y∗<4.01.5<y^*<4.0 and −5.0<y∗<−2.5-5.0<y^*<-2.5 in the nucleon-nucleon centre-of-mass system. For both particles, the nuclear modification factor and the forward-backward production ratio are determined. These results are compared with theoretical models that include initial-state nuclear effects. In addition, measurements of the cross-section ratios between D+D^+, Ds+D^+_{s} and D0D^0 mesons are presented, providing a baseline for studying the charm hadronization in lead-lead collisions at LHC energies

    Measurement of prompt D+D^+ and Ds+D^+_{s} production in pPbp\mathrm{Pb} collisions at sNN=5.02 \sqrt {s_{\mathrm{NN}}}=5.02\,TeV

    No full text
    International audienceThe production of prompt D+D^+ and Ds+D^+_{s} mesons is studied in proton-lead collisions at a centre-of-mass energy of sNN=5.02 \sqrt {s_{\mathrm{NN}}}=5.02\,TeV. The data sample corresponding to an integrated luminosity of (1.58±0.02)nb−1(1.58\pm0.02)\mathrm{nb}^{-1} is collected by the LHCb experiment at the LHC. The differential production cross-sections are measured using D+D^+ and Ds+D^+_{s} candidates with transverse momentum in the range of 0<pT<14 GeV/c0<p_{\mathrm{T}} <14\,\mathrm{GeV}/c and rapidities in the ranges of 1.5<y∗<4.01.5<y^*<4.0 and −5.0<y∗<−2.5-5.0<y^*<-2.5 in the nucleon-nucleon centre-of-mass system. For both particles, the nuclear modification factor and the forward-backward production ratio are determined. These results are compared with theoretical models that include initial-state nuclear effects. In addition, measurements of the cross-section ratios between D+D^+, Ds+D^+_{s} and D0D^0 mesons are presented, providing a baseline for studying the charm hadronization in lead-lead collisions at LHC energies

    Evidence for the decays B0→Dˉ(∗)0ϕB^{0}\rightarrow\bar{D}^{(*)0}\phi and updated measurements of the branching fractions of the Bs0→Dˉ(∗)0ϕB^{0}_{s}\rightarrow\bar{D}^{(*)0}\phi decays

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    International audienceEvidence for the decays B0→Dˉ0ϕB^{0}\rightarrow\bar{D}^{0}\phi and B0→Dˉ∗0ϕB^{0} \rightarrow \bar{D}^{*0}\phi is reported with a significance of 3.6 σ\,\sigma and 4.3 σ\,\sigma, respectively. The analysis employs pppp collision data at centre-of-mass energies s=7\sqrt{s}=7, 8 and 13 TeV collected by the LHCb detector and corresponding to an integrated luminosity of 9 fb−1\rm{fb}^{-1}. The branching fractions are measured to be B(B0→Dˉ0ϕ)=(7.7±2.1±0.7±0.7)×10−7\mathcal{B}(B^{0}\rightarrow\bar{D}^{0}\phi) = (7.7\pm2.1\pm0.7\pm0.7)\times10^{-7}, B(B0→Dˉ∗0ϕ)=(2.2±0.5±0.2±0.2)×10−6\mathcal{B}(B^{0} \rightarrow \bar{D}^{*0}\phi)=(2.2\pm0.5\pm0.2\pm0.2)\times10^{-6}. In these results, the first uncertainties are statistical, the second systematic, and the third is related to the branching fraction of the B0→Dˉ0K+K−B^{0}\rightarrow\bar{D}^{0}K^{+}K^{-} decay, used for normalisation. By combining the branching fractions of the decays B0→Dˉ(∗)0ϕB^{0}\rightarrow\bar{D}^{(*)0}\phi and B0→Dˉ(∗)0ωB^{0}\rightarrow\bar{D}^{(*)0}\omega, the ω\omega-ϕ\phi mixing angle ÎŽ\delta is constrained to be tan⁥2ÎŽ=(3.6±0.7±0.4)×10−3\tan^2\delta = (3.6\pm0.7\pm0.4)\times10^{-3}, where the first uncertainty is statistical and the second systematic. An updated measurement of the branching fractions of the Bs0→Dˉ(∗)0ϕB^{0}_{s} \rightarrow \bar{D}^{(*)0}\phi decays, which can be used to determine the CKM angle Îł\gamma, leads to B(Bs0→Dˉ0ϕ)=(2.30±0.10±0.11±0.20)×10−5\mathcal{B}(B^{0}_{s}\rightarrow\bar{D}^{0}\phi)=(2.30\pm0.10 \pm 0.11\pm0.20)\times10^{-5}, B(Bs0→Dˉ∗0ϕ)=(3.17±0.16±0.17±0.27)×10−5\mathcal{B}(B^{0}_{s}\rightarrow\bar{D}^{*0}\phi) =(3.17\pm0.16 \pm 0.17 \pm 0.27)\times10^{-5}

    Study of the Bose-Einstein correlations of same-sign pions in proton-lead collisions

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    International audienceCorrelations of same-sign charged particles are analysed using proton-lead collision data collected by the LHCb experiment at a nucleon-nucleon centre-of-mass energy of 5.02 TeV, corresponding to an integrated luminosity of 1.06 nb-1. Bose-Einstein correlations are observed in the form of an enhancement of pair production for same-sign charged pions with a small four-momentum difference squared. The dependence of the correlation radius and the intercept parameter on the reconstructed charged-particle multiplicity is investigated. The measured correlation radii scale linearly with the cube root of the reconstructed charged-particle multiplicity, being compatible with predictions of hydrodynamic models on the collision system evolution
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