F. Klein

activity

19952022

most citedMeasurement of the proton and deuteron structure functions, F2p and F2d, and of the ratio sigma(L)/sigma(T)

407 citations · 4.2k across the 61 of their papers we have counts for

collaborators

61 papers

hep-ex2022★ 1 cited

Spin Density Matrix Elements in Exclusive $ρ^{0}$ Meson Muoproduction

G. D. Alexeev, M. G. Alexeev, C. Alice +186

We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $ρ^{0}$ meson muoproduction at COMPASS using 160~GeV/ $c$ polarised $μ^{+}$ and $μ^{-}$ beams im…

hep-ex2022★ 2 cited

Double $J / ψ$ production in pion-nucleon scattering at COMPASS

G. D. Alexeev, M. G. Alexeev, A. Amoroso +191

We present the study of the production of double $J / ψ$ mesons using COMPASS data collected with a 190 GeV/ $c$ $π^{-}$ beam scattering off NH $_{3}$ , Al and W targets. Kinematic distri…

hep-ex2021★ 23 cited

The exotic meson $π_{1} (1600)$ with $J^{P C} = 1^{-+}$ and its decay into $ρ (770) π$

M. G. Alexeev, G. D. Alexeev, A. Amoroso +192

We study the spin-exotic $J^{P C} = 1^{-+}$ amplitude in single-diffractive dissociation of 190 GeV $/ c$ pions into $π^{-} π^{-} π^{+}$ using a hydrogen target and confirm the $π_1(1600) \to…

hep-ex2021

Probing transversity by measuring $Λ$ polarisation in SIDIS

M. G. Alexeev, G. D. Alexeev, A. Amoroso +196

Based on the observation of sizeable target-transverse-spin asymmetries in single-hadron and hadron-pair production in Semi-Inclusive measurements of Deep Inelastic Scattering (SID…

hep-ex2020★ 12 cited

Spin Density Matrix Elements in Exclusive $ω$ Meson Muoproduction $^{*}$

M. G. Alexeev, G. D. Alexeev, A. Amoroso +197

We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $ω$ meson muoproduction on the proton at COMPASS using 160 GeV/ $c$ polarised $μ^{+}$ and $ μ^{…

hep-ph2020★ 36 cited

Triangle Singularity as the Origin of the $a_{1} (1420)$

G. D. Alexeev, M. G. Alexeev, A. Amoroso +194

The COMPASS experiment recently discovered a new isovector resonance-like signal with axial-vector quantum numbers, the $a_{1} (1420)$ , decaying to $f_{0} (980) π$ . With a mass too close…

Spin Density Matrix Elements in Exclusive ρ0 Meson Muoproduction

Double J/ψ production in pion-nucleon scattering at COMPASS

The exotic meson π1​(1600) with JPC=1−+ and its decay into ρ(770)π

Probing transversity by measuring Λ polarisation in SIDIS

Spin Density Matrix Elements in Exclusive ω Meson Muoproduction ∗