Study of central exclusive ${\pi }^{+}{\pi }^{-}$ production in proton-proton collisions at $\sqrt{s}=$ 5.02 and 13 TeV

Abstract

Central exclusive and semiexclusive production of ${\pi }^{+}{\pi }^{-}$ pairs is measured with the CMS detector in proton-proton collisions at the LHC at center-of-mass energies of 5.02 and 13 TeV. The theoretical description of these nonperturbative processes, which have not yet been measured in detail at the LHC, poses a significant challenge to models. The two pions are measured and identified in the CMS silicon tracker based on specific energy loss, whereas the absence of other particles is ensured by calorimeter information. The total and differential cross sections of exclusive and semiexclusive central ${\pi }^{+}{\pi }^{-}$ production are measured as functions of invariant mass, transverse momentum, and rapidity of the ${\pi }^{+}{\pi }^{-}$ system in the fiducial region defined as transverse momentum $p_{\mathrm{T}}(\pi )$ $>$ 0.2 GeV and pseudorapidity $|\eta (\pi )|$ $<$ 2.4. The production cross sections for the four resonant channels f${}_0(500)$, ${\rho }^0(770)$, f${}_0(980)$, and f${}_2(1270)$ are extracted using a simple model. These results represent the first measurement of this process at the LHC collision energies of 5.02 and 13 TeV.

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/FSQ-16-006 (CMS Public Pages)

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Cited by in corpus (8)

• Measurement of the central exclusive production of charged particle pairs in proton-proton collisions at $\sqrt{s}=200$ GeV with the STAR detector at RHIC
• Central exclusive diffractive production of axial-vector $f_1(1285)$ and $f_1(1420)$ mesons in proton-proton collisions
• Prospects for quarkonium studies at the high-luminosity LHC
• High-energy $\pi \pi$ scattering without and with photon radiation
• Production of $f_0(980)$ meson at the LHC: Color evaporation versus color-singlet gluon-gluon fusion
• Isolating the Odderon in central production in high energy $pA$ and $AA$ collisions
• Measurement of exclusive pion pair production in proton-proton collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• Glueballs from bound state equations