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Hadron spectra in p+p collisions at RHIC and LHC energies
High Energy Physics - Phenomenology · Submitted 23 Apr 2013
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim 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.
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The abstract, sentence by sentence
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.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | 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. | contribution 0.98 | 0.95 | 0.05 | asserted 0.98 |
| s1 | We review various forms of Hagedorn and Tsallis distributions and show their equivalence. | method 0.54 | 0.58 | 0.04 | asserted 1.00 |
| s2 | 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. | method 0.98 | 0.81 | 0.13 | asserted 1.00 |
| s3 | We obtain these parameters for pions, kaons and protons as a function of center of mass energy ($\sqrt{s}$). | contribution 0.62 | 0.96 | 0.06 | asserted 0.98 |
| s4 | It is found that the parameter $T$ has a weak but decreasing trend with increasing $\sqrt{s}$. | result 1.00 | 0.94 | 0.13 | asserted 1.00 |
| s5 | 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. | interpretation 0.83 | 0.93 | 0.33 | asserted 1.00 |
| s6 | 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. | interpretation 0.52 | 0.90 | 0.24 | asserted 0.93 |
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The paper
Original 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.
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References
How the literature uses it
8 arXiv papers cite this in 11 sentences
Papers citing it · 10 sentences without a confident label
Cites it as background 1 paper
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There have been a large number of studies to apply the nonextensive statistics to various physical phenomena [ref] , including relativistic nuclear collisions [ref] .
QCD equation of state with Tsallis statistics for heavy-ion collisions · Introduction · 0.95
What it cites · 1 sentence without a confident label
Cites as background 2 papers
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The Tsallis distribution [ref] describes a thermal system in terms of two parameters $T$ and $q$ and is given by [equation] Here $C_q$ is the normalization constant, $E$ is the particle energy, $T$ is the Tsallis temperature and $q$ is the so-called nonextensivity parameter which measures the temperature fluctuations [ref] in the system as: $q-1 = Var(T)/<T>^2$.
Non-Extensive Approach to Quark Matter · Particle spectra and the Tsallis distribution · 0.82
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[equation] In some of the papers [ref] , another variant of Tsallis distribution is written as
Relativistic Thermodynamics: Transverse Momentum Distributions in High-Energy Physics · Particle spectra and the Tsallis distribution · 0.88
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