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Achim Vollhardt

Researcher at University of Zurich

Publications -  89
Citations -  3332

Achim Vollhardt is an academic researcher from University of Zurich. The author has contributed to research in topics: CP violation & Branching fraction. The author has an hindex of 24, co-authored 89 publications receiving 2284 citations.

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Measurement of the Ratio of the B0→D*−τ+ντ and B0→D*−μ+νμ Branching Fractions Using Three-Prong τ -Lepton Decays

Roel Aaij, +823 more
TL;DR: In this paper, the τ-lepton decays with three charged pions in the final state were measured using a data sample of proton-proton collisions collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV.
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Observation of structure in the J/ψ-pair mass spectrum

Roel Aaij, +997 more
TL;DR: In this paper, the invariant mass spectrum of the LHCb collision data at center-of-mass energies of 7, $8, $13, and $13\mathrm{\,TeV} was studied.
Journal ArticleDOI

Observation of J/psi phi Structures Consistent with Exotic States from Amplitude Analysis of B+ -> J/psi phi K+ Decays

Roel Aaij, +775 more
TL;DR: Four J/ψϕ structures are observed, each with significance over 5 standard deviations, and the quantum numbers of these structures are determined with significance of at least 4 standard deviations.