Physics Performance of the Barrel RPC System of the HARP Experiment

Abstract

Index Terms-Gaseous detector, HARP, particle identification, resistive plate chamber (RPC), time-of-flight (TOF).

Cross-sections of large-angle hadron production in proton– and pion–nucleus interactions II: beryllium nuclei and beam momenta from ±3 GeV/c to ±15 GeV/c

“…[4] and [5], and summarized succinctly in the appendix of Ref. [1], our calibrations disagree with those published by the 'HARP Collaboration' [6][7][8][9]. Conclusions of independent review bodies on the discrepancies between our results and those from the HARP Collaboration can be found in Refs.…”

Comments on “Measurement of the production of charged pions by protons on a tantalum target”

“…This resolution represents the convolution with the non-negligible dE/ dx resolution, but is hardly compatible with the claimed 6 0.3 (GeV/c) −1 . Incidentally, convincing confirmation that the momentum resolution is much worse than claimed is given in [4] and [5]. Therein, the RPC time-of-flight resolution of p ∼ 200 MeV/c pions that is equivalent to the momentum resolution in the TPC is quoted as 260 ps.…”

“…17 (upper left panel) where they show the measurement of the specific ionization dE/dx of protons as a function of momentum 4 . One only needs to overlay the theoretical prediction, well visible in the three other panels, on the proton entries.…”

“…These 'Comments' refer to statements and claims about these detectors in the article, and before in [2][3][4][5][6][7].…”

Comments on TPC and RPC calibrations reported by the HARP collaboration

“…[5] and [6]. Therein, the RPC time-of-flight resolution of p ∼ 200 MeV/c pions that is equivalent to the p T -3 - resolution in the TPC is quoted as 260 ps.…”