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X. Han

Researcher at Heidelberg University

Publications -  497
Citations -  12973

X. Han is an academic researcher from Heidelberg University. The author has contributed to research in topics: Branching fraction & Meson. The author has an hindex of 46, co-authored 423 publications receiving 10488 citations.

Papers
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LHCb Detector Performance

Roel Aaij, +703 more
TL;DR: In this article, the performance of the various LHCb sub-detectors and the trigger system are described, using data taken from 2010 to 2012, and it is shown that the design criteria of the experiment have been met.
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Search for Lepton-Universality Violation in B + →K + ℓ+ ℓ- Decays

Roel Aaij, +861 more
TL;DR: This is the most precise measurement of R_{K} to date and is compatible with the standard model at the level of 2.5 standard deviations.
Journal ArticleDOI

Angular analysis of the $B^{0}\rightarrow K^{*0}\mu^{+}\mu^{-}$ decay using $3\,\mbox{fb}^{-1}$ of integrated luminosity

Roel Aaij, +731 more
TL;DR: In this paper, an angular analysis of the LHCb collision data is presented, where the angular observables and their correlations are reported in bins of $q^2, the invariant mass squared of the dimuon system.
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Observation of a Narrow Pentaquark State, Pc (4312)+, and of the Two-Peak Structure of the Pc (4450)+

Roel Aaij, +880 more
TL;DR: In this paper, a new pentaquark state, P_{c}(4312)+, was discovered with a statistical significance of 7.3σ in a data sample of Λ_{b}^{0}→J/ψpK^{-} decays, which is an order of magnitude larger than that previously analyzed by the LHCb Collaboration.
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Test of lepton flavor universality by the measurement of the B0 →d∗-τ+ντ branching fraction using three-prong τ decays

Roel Aaij, +807 more
- 01 Apr 2018 - 
TL;DR: In this article, the τ lepton was reconstructed with three charged pions in the final state using a novel method that exploits the different vertex topologies of signal and background to isolate samples of semitauonic decays of b hadrons with high purity.