Jets in multiparticle production in and beyond geometry of proton-proton collisions at the LHC

Abstract

Experimental findings of CMS on properties of jets and underlying events at high multiplicities in proton-proton interactions at 7 TeV are interpreted as an indication of increasing role of central collisions with small impact parameters. We find an indication that the rates of different hard processes observed by CMS and ALICE universally depend on underlying event charged-particles multiplicity until it becomes four times more than average. It is shown that the increase of the overlap area of colliding protons is not sufficient for explanation of the rate of jet production in events with charged-particle multiplicity three times higher than average and some new mechanisms are necessary like interaction of protons in rare configurations of higher than average gluon density. Such mechanisms are not included in the present Monte Carlo event generators. Further studies are proposed

Accepted for publication in Physics Letters B

References in corpus (12)

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• Underlying Event measurements in pp collisions at $\sqrt{s}$ = 0.9 and 7 TeV with the ALICE experiment at the LHC
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• Jet and underlying event properties as a function of particle multiplicity in proton-proton collisions at sqrt(s) = 7 TeV
• Comments on the observation of high multiplicity events at the LHC
• Open-charm production as a function of charged particle multiplicity in pp collisions at \sqrt{s}=7 TeV with ALICE

Cited by in corpus (12)

• Measurement of charm and beauty production at central rapidity versus charged-particle multiplicity in proton-proton collisions at $\sqrt{\text{s}}=7$ TeV
• Measurement of distributions sensitive to the underlying event in inclusive Z-boson production in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• The interaction region of high energy protons
• Collectivity from interference
• Measurement of D-meson production versus multiplicity in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Revealing nucleon and nucleus flickering in pA collisions at the LHC
• Unexpected properties of interactions of high energy protons
• Critical behavior of cross sections at LHC
• Nonperturbative approach to the parton model
• The critical regime of elastic scattering of protons at the LHC
• The robust impact parameter profile of inelastic collisions
• Open Charm production in proton-proton collisions at $\sqrt{s}$ = 13.6 TeV with Pythia event generator