Production of light-flavor hadrons in pp collisions at √s=7 and √s=13 TeV

• Titel: Production of light-flavor hadrons in pp collisions at √s=7 and √s=13 TeV
• Mitwirkende: Acharya, Shreyasi [VerfasserIn]
• Mitwirkende: Angelov, Venelin [VerfasserIn]
• Mitwirkende: Arslandok, Mesut [VerfasserIn]
• Mitwirkende: Danisch, Meike [VerfasserIn]
• Mitwirkende: Feuillard, Victor [VerfasserIn]
• Mitwirkende: Glässel, Peter [VerfasserIn]
• Mitwirkende: Kim, Jiyoung [VerfasserIn]
• Mitwirkende: Kim, Minjung [VerfasserIn]
• Mitwirkende: Pachmayer, Yvonne C. [VerfasserIn]
• Mitwirkende: Reygers, Klaus [VerfasserIn]
• Mitwirkende: Schicker, Rainer [VerfasserIn]
• Mitwirkende: Schmah, Alexander [VerfasserIn]
• Mitwirkende: Schmidt, Marten Ole [VerfasserIn]
• Mitwirkende: Stachel, Johanna [VerfasserIn]
• Mitwirkende: Windelband, Bernd [VerfasserIn]
• Mitwirkende: Yüncü, Alperen [VerfasserIn]
• Körperschaft: ALICE (Körperschaft) [VerfasserIn]
• Verf.angabe: ALICE Collaboration
• E-Jahr: 2021
• Jahr: 24 March 2021
• Umfang: 41 S.
• Fussnoten: Im Titel steht "s" steht unter dem Wurzelsymbol ; Gesehen am 21.04.2021
• Titel Quelle: Enthalten in: The European physical journal / C
• Ort Quelle: Berlin : Springer, 1998
• Jahr Quelle: 2021
• Band/Heft Quelle: 81(2021), 3, Artikel-ID 256, Seite 1-41
• ISSN Quelle: 1434-6052
• DOI: doi:10.1140/epjc/s10052-020-08690-5
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1755614527

Abstract

The production of $$\pi ^{\pm }$$, $$\mathrm{K}^{\pm }$$, $$\mathrm{K}^{0}_{S}$$, $$\mathrm{K}^{*}(892)^{0}$$, $$\mathrm{p}$$, $$\phi (1020)$$, $$\Lambda $$, $$\Xi ^{-}$$, $$\Omega ^{-}$$, and their antiparticles was measured in inelastic proton-proton (pp) collisions at a center-of-mass energy of $$\sqrt{s}$$= 13 TeV at midrapidity ($$|y|<0.5$$) as a function of transverse momentum ($$p_{\mathrm{T}}$$) using the ALICE detector at the CERN LHC. Furthermore, the single-particle $$p_{\mathrm{T}}$$distributions of $$\mathrm{K}^{0}_{S}$$, $$\Lambda $$, and $$\overline{\Lambda }$$in inelastic pp collisions at $$\sqrt{s} = 7$$ TeV are reported here for the first time. The $$p_{\mathrm{T}}$$distributions are studied at midrapidity within the transverse momentum range $$0\le p_{\mathrm{T}}\le 20$$GeV/c, depending on the particle species. The $$p_{\mathrm{T}}$$spectra, integrated yields, and particle yield ratios are discussed as a function of collision energy and compared with measurements at lower $$\sqrt{s}$$and with results from various general-purpose QCD-inspired Monte Carlo models. A hardening of the spectra at high $$p_{\mathrm{T}}$$with increasing collision energy is observed, which is similar for all particle species under study. The transverse mass and $$x_{\mathrm{T}}\equiv 2p_{\mathrm{T}}/\sqrt{s}$$scaling properties of hadron production are also studied. As the collision energy increases from $$\sqrt{s}$$= 7-13 TeV, the yields of non- and single-strange hadrons normalized to the pion yields remain approximately constant as a function of $$\sqrt{s}$$, while ratios for multi-strange hadrons indicate enhancements. The $$p_\mathrm{{T}}$$-differential cross sections of $$\pi ^{\pm }$$, $$\mathrm {K}^{\pm }$$and $$\mathrm {p}$$($$\overline{\mathrm{p}}$$) are compared with next-to-leading order perturbative QCD calculations, which are found to overestimate the cross sections for $$\pi ^{\pm }$$and $$\mathrm{p}$$($$\overline{\mathrm{p}}$$) at high $$p_\mathrm{{T}}$$.