Search Results - "Narimani Charan, A"
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1
Test of Light-Lepton Universality in the Rates of Inclusive Semileptonic B -Meson Decays at Belle II
Published in Physical review letters (02-08-2023)“…We present the first measurement of the ratio of branching fractions of inclusive semileptonic $B$-meson decays, $R(X_{e/\mu}) = \mathcal{B}(B\to X \, e \,…”
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2
Measurement of the Λ c + Lifetime
Published in Physical review letters (16-02-2023)“…An absolute measurement of the $\Lambda^{+}_c$ lifetime is reported using $\Lambda_c^+\rightarrow pK^-\pi^+$ decays in events reconstructed from data collected…”
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3
Search for a Dark Photon and an Invisible Dark Higgs Boson in μ^{+}μ^{-} and Missing Energy Final States with the Belle II Experiment
Published in Physical review letters (17-02-2023)“…The dark photon A^{'} and the dark Higgs boson h^{'} are hypothetical particles predicted in many dark sector models. We search for the simultaneous production…”
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4
Measurement of CP Violation in B0 → KS0π0 Decays at Belle II
Published in Physical review letters (14-09-2023)“…We report a measurement of the $C\!P$-violating parameters $A$ and $S$ in $B^{0}\to K_{S}^{0} \pi^{0}$ decays at Belle II using a sample of $387\times 10^{6}$…”
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5
Precise Measurement of the Ds+ Lifetime at Belle II
Published in Physical review letters (27-10-2023)“…We measure the lifetime of the $D^+_s$ meson using a data sample of 207 fb-1 collected by the Belle II experiment running at the SuperKEKB asymmetric-energy…”
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6
Search for Rare b → d ℓ + ℓ − Transitions at Belle
Published in Physical review letters (05-09-2024)“…We present the results of a search for the b → d ℓ + ℓ − flavor-changing neutral-current rare decays B + , 0 → ( η , ω , π + , 0 , ρ + , 0 ) e + e − and B + ,…”
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7
First Measurement of R ( X τ / ℓ ) as an Inclusive Test of the b → c τ ν Anomaly
Published in Physical review letters (23-05-2024)“…We measure the tau-to-light-lepton ratio of inclusive B -meson branching fractions R ( X τ / ℓ ) ≡ B ( B → X τ ν ) / B ( B → X ℓ ν ) , where ℓ indicates an…”
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8
Measurement of CP asymmetries and branching-fraction ratios for B± → DK± and Dπ± with D → $$ {K}_{\textrm{S}}^0 $$K±π∓ using Belle and Belle II data
Published in The journal of high energy physics (21-09-2023)“…A bstract We measure CP asymmetries and branching-fraction ratios for B ± → DK ± and Dπ ± decays with D → $$ {K}_{\textrm{S}}^0 $$ K S 0 K ± π ∓ , where D is a…”
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9
Observation of e+e–→ωχbJ(1P) and Search for Xb→ωΥ(1S) at s near 10.75 GeV
Published in Physical review letters (03-03-2023)“…We study the processes $e^{+}e^{–} → ωχ_{bJ}$(1P) (J=0, 1, or 2) using samples at center-of-mass energies $\sqrt{s}$ = 10.701, 10.745, and 10.805 GeV,…”
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10
Precise Measurement of the D_{s}^{+} Lifetime at Belle II
Published in Physical review letters (27-10-2023)“…We measure the lifetime of the D_{s}^{+} meson using a data sample of 207 fb^{-1} collected by the Belle II experiment running at the SuperKEKB…”
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11
Observation of e^{+}e^{-}→ωχ_{bJ}(1P) and Search for X_{b}→ωϒ(1S) at sqrt[s] near 10.75 GeV
Published in Physical review letters (03-03-2023)“…We study the processes e^{+}e^{-}→ωχ_{bJ}(1P) (J=0, 1, or 2) using samples at center-of-mass energies sqrt[s]=10.701, 10.745, and 10.805 GeV, corresponding to…”
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12
Measurement of the Λ_{c}^{+} Lifetime
Published in Physical review letters (17-02-2023)“…An absolute measurement of the Λ_{c}^{+} lifetime is reported using Λ_{c}^{+}→pK^{-}π^{+} decays in events reconstructed from data collected by the Belle II…”
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13
Measurement of the $e^+e^- \to \pi^+\pi^-\pi^0$ cross section in the energy range 0.62-3.50 GeV at Belle II
Published 07-04-2024“…We report a measurement of the $e^+e^- \to \pi^+\pi^-\pi^0$ cross section in the energy range from 0.62 to 3.50 GeV using an initial-state radiation technique…”
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14
Precise measurement of the $D^+_s$ lifetime at Belle II
Published 01-06-2023“…Phys. Rev. Lett. 131, 171803 (2023) We measure the lifetime of the $D_s^+$ meson using a data sample of 207 fb$^{-1}$ collected by the Belle II experiment…”
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15
A test of light-lepton universality in the rates of inclusive semileptonic $B$-meson decays at Belle II
Published 19-01-2023“…Phys. Rev. Lett. 131, 051804 (2023) We present the first measurement of the ratio of branching fractions of inclusive semileptonic $B$-meson decays,…”
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16
Observation of $e^+e^-\to\omega\chi_{bJ}(1P)$ and search for $X_b \to \omega\Upsilon(1S)$ at $\sqrt{s}$ near 10.75 GeV
Published 28-08-2022“…Physical Review Letters 130, 091902 (2023) We study the processes $e^+e^-\to\omega\chi_{bJ}(1P)$ ($J$ = 0, 1, or 2) using samples at center-of-mass energies…”
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17
Measurement of the $\Omega_c^0$ lifetime at Belle II
Published 17-08-2022“…Phys. Rev. D 107, L031103 (2023) We report on a measurement of the $\Omega_c^0$ lifetime using $\Omega_c^0 \to \Omega^-\pi^+$ decays reconstructed in…”
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18
Search for a dark photon and an invisible dark Higgs boson in $\mu^+\mu^-$ and missing energy final states with the Belle II experiment
Published 01-07-2022“…Phys. Rev. Lett. 130, 071804 (2023) The dark photon $A^\prime$ and the dark Higgs boson $h^\prime$ are hypothetical particles predicted in many dark sector…”
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19
Measurement of the $\Lambda_c^+$ lifetime
Published 30-06-2022“…Phys. Rev. Lett. 130, 071802 (2023) An absolute measurement of the $\Lambda^{+}_c$ lifetime is reported using $\Lambda_c^+\rightarrow pK^-\pi^+$ decays in…”
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