R Kowalewski
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Explore the profile of R Kowalewski including associated specialties, affiliations and a list of published articles.
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Recent Articles
31.
Aad G, Abbott B, Abbott D, Abeling K, Abidi S, Aboulhorma A, et al.
Phys Rev Lett
. 2023 Oct;
131(15):151802.
PMID: 37897746
This Letter reports the observation of τ-lepton-pair production in ultraperipheral lead-lead collisions Pb+Pb→Pb(γγ→ττ)Pb and constraints on the τ-lepton anomalous magnetic moment a_{τ}. The dataset corresponds to an integrated luminosity of...
32.
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^{-}...
33.
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...
34.
Aad G, Abbott B, Abbott D, Abeling K, Abidi S, Aboulhorma A, et al.
Phys Rev Lett
. 2023 Sep;
131(7):072301.
PMID: 37656838
Jet quenching is the process of color-charged partons losing energy via interactions with quark-gluon plasma droplets created in heavy-ion collisions. The collective expansion of such droplets is well described by...
35.
Aad G, Abbott B, Abbott D, Abeling K, Abidi S, Aboulhorma A, et al.
Phys Rev Lett
. 2023 Aug;
131(6):061802.
PMID: 37625052
A test of CP invariance in Higgs boson production via vector-boson fusion has been performed in the H→γγ channel using 139 fb^{-1} of proton-proton collision data at sqrt[s]=13 TeV collected...
36.
Aad G, Abbott B, Abbott D, Abed Abud A, Abeling K, Abhayasinghe D, et al.
Phys Rev Lett
. 2023 Aug;
131(6):061803.
PMID: 37625051
A search for a long-lived, heavy neutral lepton (N) in 139 fb^{-1} of sqrt[s]=13 TeV pp collision data collected by the ATLAS detector at the Large Hadron Collider is reported....
37.
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...
38.
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...
39.
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...
40.
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....