${\mathrm{K}}^{\ast }(892{)}^0$ and $\varphi (1020)$ production at midrapidity in pp collisions at $\sqrt{s}$ = 8 TeV

Abstract

The production of ${\mathrm{K}}^{\ast }(892{)}^0$ and $\varphi (1020)$ in pp collisions at $\sqrt{s}$ = 8 TeV was measured using Run 1 data collected by the ALICE collaboration at the LHC. The $p_{\mathrm{T}}$-differential yields d${}^{2}N$/d$y$d$p_{\mathrm{T}}$ in the range $0<p_{\mathrm{T}}<20$ GeV/$c$ for ${\mathrm{K}}^{\ast 0}$ and $0.4<p_{\mathrm{T}}<16$ GeV/$c$ for $\varphi$ have been measured at midrapidity, $|y|<0.5$. Moreover, improved measurements of the ${\mathrm{K}}^{\ast }(892{)}^0$ and $\varphi (1020)$ at $\sqrt{s}=7$TeV are presented. The collision energy dependence of $p_{\mathrm{T}}$ distributions, $p_{\mathrm{T}}$-integrated yields and particle ratios in inelastic pp collisions are examined. The results are also compared with different collision systems. The values of the particle ratios are found to be similar to those measured at other LHC energies. In pp collisions a hardening of the particle spectra is observed with increasing energy, but at the same time it is also observed that the relative particle abundances are independent of the collision energy. The $p_{\mathrm{T}}$-differential yields of ${\mathrm{K}}^{\ast 0}$ and $\varphi$ in pp collisions at $\sqrt{s}=8$ TeV are compared with the expectations of different Monte Carlo event generators.

arXiv comment22 pages, 7 captioned figures, 3 tables, authors from page 17, published, figures at http://alice-publications.web.cern.ch/node/5654

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• Collective expansion in pp collisions using the Tsallis statistics
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• $K^{\ast }(892{)}^0$ meson production in inelastic p+p interactions at 158 GeV/$c$ beam momentum measured by NA61/SHINE at the CERN SPS
• Measurement of K${}^{\ast }$(892)${}^{\pm }$ production in inelastic pp collisions at the LHC
• Energy dependence of $\varphi$ meson production at forward rapidity in pp collisions at the LHC
• $K^{\ast 0}$ meson production using a transport and a statistical hadronization model at energies covered by the RHIC beam energy scan
• $K^{\ast }(892{)}^0$ meson production in inelastic $p+p$ interactions at 40 and 80 GeV/$c$ beam momenta measured by NA61/SHINE at the CERN SPS
• Multiplicity and rapidity dependence of ${\mathrm{K}}^{\ast }(892{)}^0$ and $\varphi (1020)$ production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• ${\mathrm{K}}^{\ast }(892{)}^0$ and $\varphi (1020)$ production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 8.16 TeV
• Particle production at large $p_T$ in Xe+Xe collisions with jet quenching using the higher twist approach
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• Hadronic resonance production with ALICE at the LHC