V Chekelian
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Explore the profile of V Chekelian including associated specialties, affiliations and a list of published articles.
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Articles
48
Citations
32
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Recent Articles
1.
Adachi I, Adamczyk K, Aggarwal L, Aihara H, Akopov N, Aloisio A, et al.
Phys Rev Lett
. 2023 Nov;
131(18):181801.
PMID: 37977641
We present the first comprehensive tests of the universality of the light leptons in the angular distributions of semileptonic B^{0}-meson decays to charged spin-1 charmed mesons. We measure five angular-asymmetry...
2.
Adachi I, Aggarwal L, Aihara H, Akopov N, Aloisio A, Anh Ky N, et al.
Phys Rev Lett
. 2023 Nov;
131(17):171803.
PMID: 37955504
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 e^{+}e^{-} collider. The lifetime...
3.
Adachi I, Adamczyk K, Aggarwal L, Ahmed H, Aihara H, Akopov N, et al.
Phys Rev Lett
. 2023 Oct;
131(12):121802.
PMID: 37802942
We report the first search for a nonstandard-model resonance decaying into τ pairs in e^{+}e^{-}→μ^{+}μ^{-}τ^{+}τ^{-} events in the 3.6-10 GeV/c^{2} mass range. We use a 62.8 fb^{-1} sample of e^{+}e^{-}...
4.
Adachi I, Adamczyk K, Aggarwal L, Ahmed H, Aihara H, Akopov N, et al.
Phys Rev Lett
. 2023 Sep;
131(11):111803.
PMID: 37774261
We report a measurement of the CP-violating parameters C and S in B^{0}→K_{S}^{0}π^{0} decays at Belle II using a sample of 387×10^{6} BB[over ¯] events recorded in e^{+}e^{-} collisions at...
5.
Aggarwal L, Ahmed H, Aihara H, Akopov N, Aloisio A, Anh Ky N, et al.
Phys Rev Lett
. 2023 Aug;
131(5):051804.
PMID: 37595249
We present the first measurement of the ratio of branching fractions of inclusive semileptonic B-meson decays, R(X_{e/μ})=B(B→Xeν)/B(B→Xμν), a precision test of electron-muon universality, using data corresponding to 189 fb^{-1} from...
6.
Adachi I, Adamczyk K, Aggarwal L, Ahmed H, Aihara H, Akopov N, et al.
Phys Rev Lett
. 2023 Jun;
130(23):231801.
PMID: 37354391
The L_{μ}-L_{τ} extension of the standard model predicts the existence of a lepton-flavor-universality-violating Z^{'} boson that couples only to the heavier lepton families. We search for such a Z^{'} through...
7.
Lai Y, Adachi I, Aihara H, Al Said S, Asner D, Atmacan H, et al.
Phys Rev Lett
. 2023 May;
130(18):181804.
PMID: 37204904
We study B^{+}→π^{+}π^{0}π^{0} using 711 fb^{-1} of data collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. We measure an inclusive branching fraction of...
8.
Adachi I, Adamczyk K, Aggarwal L, Ahmed H, Aihara H, Akopov N, et al.
Phys Rev Lett
. 2023 May;
130(18):181803.
PMID: 37204890
We search for lepton-flavor-violating τ^{-}→e^{-}α and τ^{-}→μ^{-}α decays, where α is an invisible spin-0 boson. The search uses electron-positron collisions at 10.58 GeV center-of-mass energy with an integrated luminosity of...
9.
Adachi I, Aggarwal L, Ahmed H, Aihara H, Akopov N, Aloisio A, et al.
Phys Rev Lett
. 2023 Mar;
130(9):091902.
PMID: 36930912
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 1.6, 9.8, and 4.7 fb^{-1} of integrated luminosity, respectively....
10.
Abudinen F, Adachi I, Aggarwal L, Aihara H, Akopov N, Aloisio A, et al.
Phys Rev Lett
. 2023 Mar;
130(7):071804.
PMID: 36867830
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 of A^{'} and h^{'} in...