Production of Mesons and Baryons at High Rapidity and High Pt in Proton-Proton Collisions at sqrt(s) = 200 GeV

Abstract

We present particle spectra for charged hadrons ${\pi }^{\pm },K^{\pm },p$ and $\bar{p}$ from pp collisions at $\sqrt{s}=200$ GeV measured for the first time at forward rapidities (2.95 and 3.3). The kinematics of these measurements are skewed in a way that probes the small momentum fraction in one of the protons and large fractions in the other. Large proton to pion ratios are observed at values of transverse momentum that extend up to 4 GeV/c, where protons have momenta up to 35 GeV. Next-to-leading order perturbative QCD calculations describe the production of pions and kaons well at these rapidities, but fail to account for the large proton yields and small $\bar{p}/p$ ratios.

Accepted for publication in PRL. Minor changes in text, added two references, updated table 1

References in corpus (1)

• The BRAHMS ring imaging Cherenkov detector

Cited by in corpus (26)

• Global Analysis of Fragmentation Functions for Protons and Charged Hadrons
• Parton-to-Pion Fragmentation Reloaded
• Multiplicities of charged pions and kaons from semi-inclusive deep-inelastic scattering by the proton and the deuteron
• Azimuthal and Single Spin Asymmetries in Hard Scattering Processes
• Single Transverse Spin Asymmetries of Identified Charged Hadrons in Polarized p+p Collisions at $\sqrt{s}$ = 62.4 GeV
• Transverse Single-Spin Asymmetry and Cross-Section for pi0 and eta Mesons at Large Feynman-x in Polarized p+p Collisions at sqrt(s)=200 GeV
• The Cosmic Ray Antiproton Background for AMS-02
• Multiplicities of charged kaons from deep-inelastic muon scattering off an isoscalar target
• Threshold Resummation for Di-hadron Production in Hadronic Collisions
• Pion Fragmentation Functions at High Energy Colliders
• Explaining cosmic ray antimatter with secondaries from old supernova remnants
• Monte Carlo Simulations of Hadronic Fragmentation Functions using NJL-Jet Model
• (medium-modified) Fragmentation Functions
• New determination of the production cross section for secondary positrons and electrons in the Galaxy
• Role of quarks in hadroproduction in high energy collisions
• Single spin asymmetries in inclusive hadron production from SIDIS to hadronic collisions: universality and phenomenology
• The origin of thermal component in the transverse momentum spectra in high energy hadronic processes
• An explanation why the Theta+ is seen in some experiments and not in others
• Towards a model independent approach to fragmentation functions
• First NNLO fragmentation functions of $K_S^0$ and $\Lambda /\bar{\Lambda }$ and their uncertainties in the presence of hadron mass corrections
• Identified hadron production at high transverse momenta in p+p collisions at sqrt(NN) = 200 GeV in STAR
• Forward Hadron Productions in high energy pp collisions from a Monte-Carlo generator for Color Glass Condensate
• Single-inclusive hadron production in transversely polarized p-p and pbar-p collisions with threshold resummation
• Global extraction of the parton-to-pion fragmentation functions at NLO accuracy in QCD
• A comprehensive study of the inclusive production of negative pions in p+p collisions for interaction energies from 3 GeV to 13 TeV covering the non-perturbative sector of the Strong Interaction
• Transverse Single Spin Asymmetries in Hadronic Interactions: an experimental overview and outlook