Multiplicity Dependence of Hadron Spectra in Proton-proton Collisions at LHC Energies and Super-statistics

2012/12/02 by Károly Ürmössy, K. Urmossy, Urmossy, K. · 3 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.1212.0260

9 pages, 10 figures

arxiv created 2013/02/21 · arxiv updated 2013/02/22

Abstract

In this paper, transverse momentum spectra of pi+, K+ and p measured at fix event-multiplicities and √ s = 0.9, 2.76 and 7 TeV collision energies by the CMS Collabotaion are shown to fit the Tsallis-distribution. It is found that the power of the distribution shows a double-logarithmic dependence on the event-multiplicity N, while the T parameter depends linearly on N. A similar double-logarithmic dependence of the q parameter of pi0 spectra on the collision energy √(s) is found too. It is also shown that event-by-event fluctuations of the multiplicity N and the total E_T energy going into the transverse region can be the reason for the emergence of the Tsallis distribution in high-energy proton-proton collisions.

Cited by

• A `soft + hard' model for heavy-ion collisions
• v<sub>2</sub> of charged hadrons in a`soft + hard' model for PbPb collisions at √ s = 2.76 ATeV
• Pion p_T spectra in p+p collisions as a function of √(s) and event multiplicity

Related

• Pion p_T spectra in p+p collisions as a function of √(s) and event multiplicity
• Quantifying the Underlying Event: Investigating Angular Dependence of Multiplicity Classes and Transverse-momentum Spectra in High-energy pp Collisions at LHC Energies
• Transverse momentum distributions in proton–proton collisions at LHC energies and Tsallis thermodynamics
• Proton-proton multiplicity distributions at LHC and the Pomeron intercept
• Analysis of multiplicity distributions in proton-proton collisions at LHC up to √ s = 7 TeV in quantum statistical approach