The HARP Collaboration recently published calibrations of their TPC and RPC detectors, and differential cross-sections of large-angle pion production in proton-nucleus collisions. We argue that these calibrations are biased and cross-sections based on them should not be trusted.
@article{arxiv.0711.2216,
title = {Comments on TPC and RPC calibrations reported by the HARP Collaboration},
author = {V. Ammosov},
journal= {arXiv preprint arXiv:0711.2216},
year = {2008}
}