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

  • Author(s): Acharya, S;
  • Adamová, D;
  • Adler, A;
  • Adolfsson, J;
  • Aggarwal, MM;
  • Rinella, GA;
  • Agnello, M;
  • Agrawal, N;
  • Ahammed, Z;
  • Ahmad, S;
  • Ahn, SU;
  • Akindinov, A;
  • Al-Turany, M;
  • Alam, SN;
  • Albuquerque, DSD;
  • Aleksandrov, D;
  • Alessandro, B;
  • Alfanda, HM;
  • Molina, RA;
  • Ali, B;
  • Ali, Y;
  • Alici, A;
  • Alkin, A;
  • Alme, J;
  • Alt, T;
  • Altenkamper, L;
  • Altsybeev, I;
  • Anaam, MN;
  • Andrei, C;
  • Andreou, D;
  • Andrews, HA;
  • Andronic, A;
  • Angeletti, M;
  • Anguelov, V;
  • Anson, C;
  • Antičić, T;
  • Antinori, F;
  • Antonioli, P;
  • Apadula, N;
  • Aphecetche, L;
  • Appelshäuser, H;
  • Arcelli, S;
  • Arnaldi, R;
  • Arratia, M;
  • Arsene, IC;
  • Arslandok, M;
  • Augustinus, A;
  • Averbeck, R;
  • Aziz, S;
  • Azmi, MD;
  • Badalà, A;
  • Baek, YW;
  • Bagnasco, S;
  • Bai, X;
  • Bailhache, R;
  • Bala, R;
  • Balbino, A;
  • Baldisseri, A;
  • Ball, M;
  • Balouza, S;
  • Banerjee, D;
  • Barbera, R;
  • Barioglio, L;
  • Barnaföldi, GG;
  • Barnby, LS;
  • Barret, V;
  • Bartalini, P;
  • Barth, K;
  • Bartsch, E;
  • Baruffaldi, F;
  • Bastid, N;
  • Basu, S;
  • Batigne, G;
  • Batyunya, B;
  • Bauri, D;
  • Alba, JLB;
  • Bearden, IG;
  • Beattie, C;
  • Bedda, C;
  • Behera, NK;
  • Belikov, I;
  • Hechavarria, ADCB;
  • Bellini, F;
  • Bellwied, R;
  • Belyaev, V;
  • Bencedi, G;
  • Beole, S;
  • Bercuci, A;
  • Berdnikov, Y;
  • Berenyi, D;
  • Bertens, RA;
  • Berzano, D;
  • Besoiu, MG;
  • Betev, L;
  • Bhasin, A;
  • Bhat, IR;
  • Bhat, MA;
  • Bhatt, H;
  • Bhattacharjee, B;
  • Bianchi, A
  • et al.
Abstract

The production of π±, K ±, KS0, K ∗(892) , p , ϕ(1020) , Λ , Ξ -, Ω -, and their antiparticles was measured in inelastic proton–proton (pp) collisions at a center-of-mass energy of s = 13 TeV at midrapidity (| y| < 0.5) as a function of transverse momentum (pT) using the ALICE detector at the CERN LHC. Furthermore, the single-particle pT distributions of KS0, Λ , and Λ ¯ in inelastic pp collisions at s=7 TeV are reported here for the first time. The pT distributions are studied at midrapidity within the transverse momentum range 0 ≤ pT≤ 20 GeV/c, depending on the particle species. The pT spectra, integrated yields, and particle yield ratios are discussed as a function of collision energy and compared with measurements at lower s and with results from various general-purpose QCD-inspired Monte Carlo models. A hardening of the spectra at high pT with increasing collision energy is observed, which is similar for all particle species under study. The transverse mass and xT≡2pT/s scaling properties of hadron production are also studied. As the collision energy increases from s = 7–13 TeV, the yields of non- and single-strange hadrons normalized to the pion yields remain approximately constant as a function of s, while ratios for multi-strange hadrons indicate enhancements. The pT-differential cross sections of π±, K ± and p (p ¯) are compared with next-to-leading order perturbative QCD calculations, which are found to overestimate the cross sections for π± and p (p ¯) at high pT.

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