Stefan Meinel
@stefanmeinel.bsky.social
Associate Professor of Physics at University of Arizona, Tucson
Tucson Mountain Park in the Sonoran Desert this morning
October 12, 2025 at 3:30 PM
Tucson Mountain Park in the Sonoran Desert this morning
The LHC Physics Center at Fermilab is hosting a workshop on "Violation of Fundamental Symmetries with B mesons" on December 15-19 (indico.fnal.gov/event/71119/). The workshop is dedicated to the memory of Professors Sheldon Stone and Ian Shipsey, who made significant contributions to B physics.
September 23, 2025 at 8:06 PM
The LHC Physics Center at Fermilab is hosting a workshop on "Violation of Fundamental Symmetries with B mesons" on December 15-19 (indico.fnal.gov/event/71119/). The workshop is dedicated to the memory of Professors Sheldon Stone and Ian Shipsey, who made significant contributions to B physics.
An exciting new result from LHCb! The decay Λb→J/ψΛ was used as a normalization mode for Λb→Λμ+μ− in arxiv.org/abs/1503.07138, where the estimate B(Λb→J/ψΛ)=(6.3 ± 1.3) × 10−4 was used.
Measurement of the branching fraction of the Λb⁰→J/ψΛ decay and isospin asymmetry of B→J/ψK decays arxiv.org/abs/2509.12805 - B(Λb⁰→J/ψΛ)=(3.34±0.02±0.10±0.08±0.28)×10−4. In addition, the isospin asymmetry between the rates of B⁰→J/ψK⁰s and B⁺→J/ψK+ decays is measured to be AI=−0.0135±0.0004±0.0133.
September 17, 2025 at 9:20 AM
An exciting new result from LHCb! The decay Λb→J/ψΛ was used as a normalization mode for Λb→Λμ+μ− in arxiv.org/abs/1503.07138, where the estimate B(Λb→J/ψΛ)=(6.3 ± 1.3) × 10−4 was used.
A large discrepancy between theory and experiment for the decay rate of Xi_c^0 (down-strange-charm) baryons to Xi^- (down-strange-strange) baryons and leptons: arxiv.org/abs/2504.07302 . The problem may be with the measurement of the nonleptonic normalization decay mode.
April 11, 2025 at 1:45 PM
A large discrepancy between theory and experiment for the decay rate of Xi_c^0 (down-strange-charm) baryons to Xi^- (down-strange-strange) baryons and leptons: arxiv.org/abs/2504.07302 . The problem may be with the measurement of the nonleptonic normalization decay mode.