M. Halvorsen

collaborators

27 papers

hep-ex2025

Amplitude analysis of the $Ξ_{c}^{+} \to p K^{-} π^{+}$ decay and $Ξ_{c}^{+}$ baryon polarization measurement in semileptonic beauty-hadron decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1128

An amplitude analysis of the $Ξ_{c}^{+} \to p K^{-} π^{+}$ decay together with a measurement of the $Ξ_{c}^{+}$ polarization vector in semileptonic beauty-hadron decays is presented. The analysis…

nucl-ex2025

Coherent photoproduction of $ρ^{0}, ω$ and excited vector mesons in ultraperipheral PbPb collisions

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1132

The invariant-mass distribution for the coherent photoproduction of dipions in ultraperipheral PbPb collisions is measured using data, corresponding to an integrated luminosity of…

hep-ex2025

Measurements of charmed meson and antimeson production asymmetries at $s = 13.6$ TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1130

This article presents doubly differential measurements of the asymmetries in production rates between mesons containing a charm quark and those containing an anticharm quark in pro…

hep-ex2025

Measurement of the branching fraction ratio $R_{K}$ at large dilepton invariant mass

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1138

A test of lepton universality between muons and electrons is performed using $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ decays (where $ℓ$ = $e$ , $μ$ ), in the dilepton invariant-mass-squared regio…

hep-ex2025

Observation of the doubly-charmed-baryon decay $Ξ_{cc}^{++} \to Ξ_{c}^{0} π^{+} π^{+}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1134

A search for the doubly-charmed-baryon decay $Ξ_{cc}^{++} \to Ξ_{c}^{0} π^{+} π^{+}$ is performed using proton-proton collision data collected by the LHCb experiment at a c…

hep-ex2025

The Timepix4 Beam Telescope

Kazu Akiba, Jerome Alozy, David Bacher +40

The spatial and temporal performance of a telescope system comprising planar silicon sensors bump-bonded to Timepix4-v2 ASICs are assessed at the CERN SPS using a $180$ ~GeV/ $c$ mix…

Amplitude analysis of the Ξc+​→pK−π+ decay and Ξc+​ baryon polarization measurement in semileptonic beauty-hadron decays

Coherent photoproduction of ρ0,ω and excited vector mesons in ultraperipheral PbPb collisions

Measurements of charmed meson and antimeson production asymmetries at s​=13.6 TeV

Measurement of the branching fraction ratio RK​ at large dilepton invariant mass

Observation of the doubly-charmed-baryon decay Ξcc++​→Ξc0​π+π+

The Timepix4 Beam Telescope

Amplitude analysis of the $Ξ_{c}^{+} \to p K^{-} π^{+}$ decay and $Ξ_{c}^{+}$ baryon polarization measurement in semileptonic beauty-hadron decays

Coherent photoproduction of $ρ^{0}, ω$ and excited vector mesons in ultraperipheral PbPb collisions

Measurements of charmed meson and antimeson production asymmetries at $s = 13.6$ TeV

Measurement of the branching fraction ratio $R_{K}$ at large dilepton invariant mass

Observation of the doubly-charmed-baryon decay $Ξ_{cc}^{++} \to Ξ_{c}^{0} π^{+} π^{+}$