Comments concerning the paper ”Measurement of negatively charged pion spectra in inelastic p+p interactions at 20, 31, 40, 80 and 158 GeV/c” by the NA61 collaboration

Fischer, H.G.; Wenig, S.; Makariev, M.; Varga, D.

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Preprint
Report number	arXiv:1401.3192 ; CERN-PH-EP-2013-225 ; CERN-PH-EP-2013-225
Title	Comments concerning the paper ”Measurement of negatively charged pion spectra in inelastic p+p interactions at 20, 31, 40, 80 and 158 GeV/c” by the NA61 collaboration
Author(s)	Fischer, H.G. (CERN) ; Makariev, M. (Sofiya, Inst. Nucl. Res.) ; Varga, D. (Budapest, RMKI) ; Wenig, S. (CERN)
Publication	2014
Imprint	14 Jan 2014
Number of pages	16
Note	Comments: 16 pages, 13 figures 16 pages, 13 figures
Subject category	Particle Physics - Experiment
Keywords	experimental results ; p+p interactions ; beam momentum range 20 - 158 GeV/c ; negative pion production ; data comparison
Abstract	New data from the NA61 collaboration on the production of negative pions in p+p interactions at beam momenta between 20 and 158 GeV/c are critically compared to available results in the same energy range. It is concluded that the NA61 data do not come up to the quality of the existing work. This concerns in particular the total yields, the pT integrated rapidity distributions and the double differential cross sections.
Other source	Inspire
Copyright/License	Preprint: © 2014-2025 CERN (License: CC-BY-3.0)
Submitted by	[email protected]

$Selection of reference experiments for $\pi^-$ production in p+p interactions, giving beam momentum, $\sqrt{s}$, the number of events available and the type of detector (HBC = hydrogen bubble chamber)$ $K$^-$/$\pi^-$ and $\overline{\textrm{p}}$/$pi^-$ ratios as a function of $\sqrt{s}$. The full lines correspond to the new determination of the energy dependence of K$^-$ \cite{pp_kaon} and $\overline{\textrm{p}}$ \cite{pp_proton} yields by the NA49 collaboration. The measurement of the K$^-$/$\pi^-$ ratio at 32~GeV/c beam momentum and the correction deduced from the measured K$^0_S$ yields at 69~GeV/c are given as data points$