Measurement of $\phi$ meson production in p+p interactions at 40, 80 and 158 GeV/c with the NA61/SHINE spectrometer at the CERN SPS.

Le résumé fourni par la source

Results on $\\phi$ meson production in inelastic p+p collisions at CERN SPS energies are presented. They are derived from data collected by the NA61/SHINE fixed target experiment, by means of invariant mass spectra fits in the $\\phi$ to $K^+ K^-$ decay channel. They include the first ever measured double differential spectra of $\\phi$ mesons as a function of rapidity $y$ and transverse momentum $p_T$ for proton beam momenta of 80 GeV/$c$ and 158 GeV/$c$, as well as single differential spectra of $y$ or $p_T$ for beam momentum of 40 GeV/$c$. The corresponding total $\\phi$ yields per inelastic p+p event are obtained. These results are compared with existing data on $\\phi$ meson production in p+p collisions. The comparison shows consistency but superior accuracy of the present measurements. The emission of $\\phi$ mesons in p+p reactions is confronted with that occurring in Pb+Pb collisions, and the experimental results are compared with model predictions. It appears that none of the considered models can properly describe all the experimental observables.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.