ORCID Profile
0000-0003-1048-7732
Current Organisation
National Research University Higher School of Economics
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Publisher: Springer Science and Business Media LLC
Date: 17-10-2023
Publisher: Springer Science and Business Media LLC
Date: 28-09-2023
Publisher: Springer Science and Business Media LLC
Date: 02-01-2202
DOI: 10.1140/EPJC/S10052-023-11759-6
Abstract: The very rare $${{D} ^*} (2007)^0\\!\\rightarrow {\\mu ^+\\mu ^-} $$ D ∗ ( 2007 ) 0 → μ + μ - decay is searched for by analysing $${{{B} ^-}} \\!\\rightarrow {{\\pi } ^-} {\\mu ^+\\mu ^-} $$ B - → π - μ + μ - decays. The analysis uses a s le of beauty mesons produced in proton–proton collisions collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 $$\\text {\\,fb} ^{-1}$$ \\,fb - 1 . The signal signature corresponds to simultaneous peaks in the $${\\mu ^+\\mu ^-} $$ μ + μ - and $${{\\pi } ^-} {\\mu ^+\\mu ^-} $$ π - μ + μ - invariant masses. No evidence for an excess of events over background is observed and an upper limit is set on the branching fraction of the decay at $$\\mathcal{B}({{D} ^*} (2007)^0\\!\\rightarrow {\\mu ^+\\mu ^-} ) 2.6\\times 10^{-8}$$ B ( D ∗ ( 2007 ) 0 → μ + μ - ) 2.6 × 10 - 8 at $$90\\%$$ 90 % confidence level. This is the first limit on the branching fraction of $${{D} ^*} (2007)^0\\!\\rightarrow {\\mu ^+\\mu ^-} $$ D ∗ ( 2007 ) 0 → μ + μ - decays and the most stringent limit on $${{D} ^*} (2007)^0$$ D ∗ ( 2007 ) 0 decays to leptonic final states. The analysis is the first search for a rare charm-meson decay exploiting production via beauty decays.
Publisher: Springer Science and Business Media LLC
Date: 20-09-2202
Publisher: American Physical Society (APS)
Date: 27-07-2023
Publisher: American Physical Society (APS)
Date: 18-09-2023
Publisher: American Physical Society (APS)
Date: 10-10-2023
Publisher: Springer Science and Business Media LLC
Date: 25-08-2023
Abstract: The B + → Jψη ′ K + decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb − 1 . The branching fraction of this decay is measured relative to the known branching fraction of the B + → ψ (2 S ) K + decay and found to be $$ \\frac{\\mathcal{B}\\left({B}^{+}\\to {J\\psi \\eta}^{\\prime }{K}^{+}\\right)}{\\mathcal{B}\\left({B}^{+}\\to \\psi (2S){K}^{+}\\right)}=\\left(4.91\\pm 0.47\\pm 0.29\\pm 0.07\\right)\\times {10}^{-2}, $$ B B + → Jψη ′ K + B B + → ψ 2 S K + = 4.91 ± 0.47 ± 0.29 ± 0.07 × 10 − 2 , where the first uncertainty is statistical, the second is systematic and the third is related to external branching fractions. A first look at the J/ψη ′ mass distribution is performed and no signal of intermediate resonances is observed.
Publisher: Springer Science and Business Media LLC
Date: 20-10-2023
Publisher: Springer Science and Business Media LLC
Date: 26-09-2023
Publisher: American Physical Society (APS)
Date: 23-10-2023
Publisher: American Physical Society (APS)
Date: 23-10-2023
Publisher: American Physical Society (APS)
Date: 17-08-2023
Location: No location found
Location: Russian Federation
No related grants have been discovered for Vladimir Bocharnikov.