Hadron spectra in p+p collisions at RHIC and LHC energies

Abstract

We present the systematic analysis of transverse momentum ($p_T$) spectra of identified hadrons in p+p collisions at RHIC ($\sqrt{s}$ = 62.4 and 200 GeV) and at LHC energies ($\sqrt{s}$ = 0.9, 2.76 and 7.0 TeV) using phenomenological fit functions. We review various forms of Hagedorn and Tsallis distributions and show their equivalence. We use Tsallis distribution which successfully describes the spectra in p+p collisions using two parameters, Tsallis temperature $T$ which governs the soft bulk spectra and power $n$ which determines the initial production in partonic collisions. We obtain these parameters for pions, kaons and protons as a function of center of mass energy ($\sqrt{s}$). It is found that the parameter $T$ has a weak but decreasing trend with increasing $\sqrt{s}$. The parameter $n$ decreases with increasing $\sqrt{s}$ which shows that production of hadrons at higher energies are increasingly dominated by point like qq scatterings. Another important observation is with increasing $\sqrt{s}$, the separation between the powers for protons and pions narrows down hinting that the baryons and mesons are governed by same production process as one moves to the highest LHC energy.

13 pages, 6 figures

References in corpus (8)

• Measurements of Strange Particle Production in $p+p$ Collisions at $\sqrt{s}$= 200 GeV
• Thermal Dileptons at LHC
• Heavy-Quark Kinetics in the QGP at LHC
• Measurement of neutral mesons in p+p collisions at sqrt(s) = 200 GeV and scaling properties of hadron production
• Coalescence Models For Hadron Formation From Quark Gluon Plasma
• Identified charged hadron production in p+p collisions at sqrt(s)=200 and 62.4 GeV
• Study of the inclusive production of charged pions, kaons, and protons in pp collisions at sqrt(s) = 0.9, 2.76, and 7 TeV
• Meson spectra and m_T scaling in p+p, d+Au and Au+Au collisions at \sqrtS_NN=200 GeV

Cited by in corpus (34)

• From QCD-based hard-scattering to nonextensive statistical mechanical descriptions of transverse momentum spectra in high-energy $pp$ and $p\bar{p}$ collisions
• Radial Flow in Non-Extensive Thermodynamics and Study of Particle Spectra at LHC in the Limit of Small $(q-1)$
• Tsallis statistics approach to the transverse momentum distributions in p-p collisions
• System size dependence of hadron $p_T$ spectra in p+p and Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
• Systematic analysis of hadron spectra in p+p collisions using Tsallis distribution
• Nuclear Modification Factor Using Tsallis Non-extensive Statistics
• Tsallis Distribution Decorated With Log-Periodic Oscillation
• Multiplicity Dependence of Non-extensive Parameters for Strange and Multi-Strange Particles in Proton-Proton Collisions at $\sqrt{s}=7$ TeV at the LHC
• Radial Flow and Differential Freeze-out in Proton-Proton Collisions at $\sqrt{s}=7$ TeV at the LHC
• On the precise determination of the Tsallis parameters in proton - proton collisions at LHC energies
• Analytic results for the Tsallis thermodynamic variables
• Some intriguing aspects of multiparticle production processes
• Transverse momentum spectra of hadrons in high energy pp and heavy ion collisions
• Possible Implication of a Single Nonextensive $p_T$ Distribution for Hadron Production in High-Energy $pp$ Collisions
• System size dependence of the log-periodic oscillations of transverse momentum spectra
• Quasi-power laws in multiparticle production processes
• Collective expansion in pp collisions using the Tsallis statistics
• Event shape and Multiplicity dependence of Freeze-out Scenario and System Thermodynamics in Proton+Proton Collisions at $\sqrt{s}$ = 13 TeV using PYTHIA8
• Analysis of multiplicity dependencies of midrapidity pt distributions of identified charged particles in p+p collisions at (s)1/2=7 TeV at the LHC
• The Novel Scaling of Tsallis Parameters from the Transverse Momentum Spectra of Charged Particles in Heavy-Ion Collisions
• Extensive/nonextensive statistics for $p_T$ distributions of various charged particles produced in p+p and A+A collisions in a wide range of energies
• A 'soft+hard' model for Pion, Kaon, and Proton Spectra and $v_2$ measured in PbPb Collisions at $\sqrt{s}=2.76A$TeV
• QCD equation of state with Tsallis statistics for heavy-ion collisions
• Transverse momentum spectra of strange hadrons within extensive and nonextensive statistics
• Strange hadron production in pp, pPb and PbPb collisions at LHC energies
• Multiplicity dependence of the freezeout parameters in high energy hadron-hadron collisions
• Systematic investigation of the particle spectra in Heavy-ion collisions at the Large Hadron Collider
• Scaling behaviours of the $p_T$ spectra for identified hadrons in $pp$ collisions
• Comparing the Tsallis distribution with and without thermodynamical description in p+p collisions
• Analyzing the Correlation Between Thermal and Kinematic Parameters in Various Multiplicity Classes within 7 and 13 TeV pp Collisions
• Understanding partonic energy loss from measured light charged particles and jets in PbPb collisions at LHC energies
• Jet Mass Dependence of Fragmentation in Positron-Proton Collisions
• Empirical determination of the energy loss of heavy quarks in nuclear collisions at RHIC and LHC energies
• Analysis of kinetic freeze out temperature and transverse flow velocity in nucleus-nucleus and proton-proton collisions at same center of mass energy