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Measurement of the e+e- --> hadrons cross-section at low energy with ISR events at BABAR
Bogdan Malaescu
The precise measurement of the cross section e+e- --> pi+ pi-(gamma) from threshold to an energy of 3 GeV, using events with Initial State Radiation (ISR) collected with the BABAR…
Reevaluation of the Hadronic Contributions to the Muon g-2 and to alpha(MZ)
Michel Davier, Andreas Hoecker, Bogdan Malaescu +1
We reevaluate the hadronic contributions to the muon magnetic anomaly, and to the running of the electromagnetic coupling constant at the Z-boson mass. We include new pi+pi- cross-…
Search for Production of Invisible Final States in Single-Photon Decays of Upsilon(1S)
P. del Amo Sanchez
We search for single-photon decays of the Upsilon(1S) resonance, Upsilon->gamma+invisible, where the invisible state is either a particle of definite mass, such as a light Higgs bo…
Search for f_J(2220) in radiative J/psi decays
The BABAR Collaboration, P. del Amo Sanchez
We present a search for f_J(2220) production in radiative J/psi -> gamma f_J(2220) decays using 460 fb-1 of data collected with the BABAR detector at the SLAC PEP-II e+e- collider.…
The Current Status of g-2
Bogdan Malaescu
Recently, important updates were made for the hadronic contribution to the theoretical prediction of g-2. The isospin-breaking-corrections, needed in the comparison of the two pion…
A note on renormalon models for the determination of alpha_s(M_tau)
S. Descotes-Genon, B. Malaescu
The tau hadronic width provides a determination of the strong coupling constant alpha_s at low energies, since it can be related to a weighted integral of the Adler function in the…