Identified hadron production at high transverse momenta in p+p collisions at sqrt(NN) = 200 GeV in STAR

Abstract

We report the transverse momentum (pT) distributions for identified charged pions, protons and anti-protons using events triggered by high deposit energy in the Barrel Electro-Magnetic Calorimeter (BEMC) from p + p collisions at psNN = 200 GeV. The spectra are measured around mid-rapidity (|y|<0.5) over the range of 3<pT<15 GeV/c with particle identification (PID) by the relativistic ionization energy loss (rdE/dx) in the Time Projection Chamber (TPC) in the Solenoidal Tracker at RHIC (STAR). The charged pion, proton and anti-proton spectra at high pT are compared with published results from minimum bias triggered events and the Next-Leading-Order perturbative quantum chromodynamic (NLO pQCD) calculations (DSS, KKP and AKK 2008). In addition, we present the particle ratios of pi-/pi+, pbar/p, p/pi+ and pbar/pi- in p + p collisions.

arXiv comment4 pages, 4 figures, Hot Quark 2008 proceeding

References in corpus (9)

• Identified baryon and meson distributions at large transverse momenta from Au+Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Identified hadron spectra at large transverse momentum in p+p and d+Au collisions at \sqrts_NN = 200 GeV
• Global Analysis of Fragmentation Functions for Protons and Charged Hadrons
• Fragmentation Functions for Light Charged Hadrons with Complete Quark Flavour Separation
• Energy dependence of charged pion, proton and anti-proton transverse momentum spectra for Au+Au collisions at \sqrt{s_NN} = 62.4 and 200 GeV
• Testing the Universality of Fragmentation Functions
• Pion, kaon, proton and anti-proton transverse momentum distributions from p+p and d+Au collisions at $\sqrt{s_{NN}}=200$ GeV
• Production of Mesons and Baryons at High Rapidity and High Pt in Proton-Proton Collisions at sqrt(s) = 200 GeV
• Improving the dE/dx calibration of the STAR TPC for the high-pT hadron identification

Cited by in corpus (5)

• A Very High Momentum Particle Identification Detector
• Factorization breaking in high-transverse-momentum charged-hadron production at the Tevatron?
• Measurements of neutral and charged kaon production at high pT up to 15 GeV/c at STAR
• Identified Hadrons and Jet Chemistry for p+p and Au+Au Collisions at RHIC
• Recent STAR Results from Charged Pion Production in Polarized pp Collisions at $\sqrt{s}=200GeV$ at RHIC