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The mid-rapidity transverse momentum spectra of hadrons and the availablerapidity distributions of the strange hadrons produced in p-p collisions at LHCenergy root(snn) = 0.9 TeV and root(snn)= 7.0 TeV have been studied using aunified statistical thermal freeze-out model. The calculated results are foundto be in good agreement with the experimental data. The theoretical fits of thetransverse momentum spectra using the model calculations provide the thermalfreeze-out conditions in terms of the temperature and collective flowparameters for different hadronic species. The study reveal the presence ofsignificant collective flow and a well defined temperature in the system thusindicating the formation of a thermally equilibrated hydrodynamic system in p-pcollisions at LHC. Moreover, the fits to the available experimental rapiditydistributions data of strange hadrons show the effect of almost completetransparency in p-p collisions at LHC. The transverse momentum distributions ofprotons and Kaons produced in p-p collisions at root(snn) = 200 GeV androot(snn)= 2.76 TeV have also been reproduced successfully. The modelincorporates longitudinal as well as a transverse hydrodynamic flow. Thecontributions from heavier decay resonances have also been taken into account.We have also imposed the criteria of exact strangeness conservation in thesystem.

Indication of Collective Flow and Transparency in p-p Collisions at LHC