Production of $t\bar{t}$ pairs via $\gamma \gamma$ fusion with photon transverse momenta and proton dissociation

Abstract

We discuss the production of $t\bar{t}$ quark-antiquark pairs in proton-proton collisions via the $\gamma \gamma$ fusion mechanism. We include topologies in which both protons stay intact or one or even both of them undergo dissociation. The calculations are performed within the $k_{\mathrm{T}}$-factorisation approach, including transverse momenta of intermediate photons. Photon fluxes associated to inelastic (dissociative) processes are calculated based on modern parameterisations of proton structure functions. We find an integrated cross section of about 2.36 fb at $\sqrt{s}=$ 13 TeV for all contributions. The cross section for the fully elastic process is the smallest. Inelastic contributions are significantly reduced when a veto on outgoing jets is imposed. We present several differential distributions in rapidity and transverse momenta of single $t$ or $\bar{t}$ quarks/antiquarks as well as distributions in invariant mass of both the $t\bar{t}$ and masses of dissociated systems. A few two-dimensional distributions are presented in addition.

arXiv comment12 pages, 11 figures

References in corpus (7)

• Parton distributions for the LHC
• How bright is the proton? A precise determination of the photon parton distribution function
• The Photon Content of the Proton
• Top-pair production at the LHC through NNLO QCD and NLO EW
• Central ${\mu }^{+}{\mu }^{-}$ production via photon-photon fusion in proton-proton collisions with proton dissociation
• Rapidity gap survival factors caused by remnant fragmentation for $W^{+}{W}^{-}$ pair production via ${\gamma }^{\ast }{\gamma }^{\ast }\to W^{+}{W}^{-}$ subprocess with photon transverse momenta
• Production of $W^{+}{W}^{-}$ pairs via ${\gamma }^{\ast }{\gamma }^{\ast }\to W^{+}{W}^{-}$ subprocess with photon transverse momenta

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