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J Guilliams

Explore the profile of J Guilliams including associated specialties, affiliations and a list of published articles. Areas
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Recent Articles
1.
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^{-}...
2.
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...
3.
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...
4.
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....
5.
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...
6.
Abudinen F, Aggarwal L, Ahmed H, Ahn J, Aihara H, Akopov N, et al.
Phys Rev Lett . 2023 Mar; 130(7):071802. PMID: 36867815
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 experiment at the SuperKEKB asymmetric-energy electron-positron collider. The...
7.
Abudinen F, Adachi I, Adamczyk K, Aggarwal L, Ahmed H, Aihara H, et al.
Phys Rev Lett . 2021 Dec; 127(21):211801. PMID: 34860075
We report a measurement of the D^{0} and D^{+} lifetimes using D^{0}→K^{-}π^{+} and D^{+}→K^{-}π^{+}π^{+} decays reconstructed in e^{+}e^{-}→cc[over ¯] data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy...