Abstract
We study the charged pion transverse momentum(pT)spectra inp+pcollisions as a function of collision energysand event multiplicity using Tsallis distribution. This study gives an insight of the pion production process inp+pcollisions. The study covers pion spectra measured inp+pcollisions at SPS energies (6.27–17.27 GeV), RHIC energies (62.4 GeV and 200 GeV), and LHC energies (900 GeV, 2.76 TeV, and 7 TeV). The Tsallis parameters have been obtained and parameterized as a function ofs. The study suggests that as we move to higher energy more and more hard processes contribute to the spectra. We also study the charged pion spectra for different event multiplicities inp+pcollisions for LHC energies using Tsallis distribution. The variation of the Tsallis parameters as a function of event multiplicity has been obtained and their behavior is found to be independent of collision energy.
Highlights
The particle spectra measured in hadronic collisions are of utmost interest because of their fundamental nature and simplicity, which allow verifying pQCD [1, 2] calculations and help to make comprehensive phenomenological studies
The low pion transverse momentum (pT) region of the spectrum corresponds to the particles originating from low momentum transfer and multiscattering processes, whereas the high pT region comes from the hard-parton-scattering among the initial partons
The value of T reduces slowly from SPS energies to LHC energies. It means that the spectra at SPS energies have large softer contribution and as the collision energy increases more and more contribution from hard processes is added
Summary
The particle spectra measured in hadronic collisions are of utmost interest because of their fundamental nature and simplicity, which allow verifying pQCD [1, 2] calculations and help to make comprehensive phenomenological studies. In a recent work [12, 13], the Tsallis distribution has been used to describe the pT spectra of identified charged hadrons measured in p + p collisions at RHIC and at LHC energies. Such an approach has been applied to the inclusive charged hadron p + p data in recent publications [14, 15]. Pions are chosen because of their abundance in collisions, simple quark structure, and availability of the data at different energies
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
