Production of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> in proton-lead collision: Photon-photon fusion

We analyze the photon-initiated processes for production of ${e}^{+}{e}^{\ensuremath{-}}$ pairs in proton-nucleus collisions at LHC energy, taking into account both elastic and proton dissociations low-mass region (LMR) intermediate-mass (IMR) as defined by ALICE collaboration. The calculations are performed within ${k}_{\mathrm{T}}$-factorization approach, including transverse momenta intermediate photons. discuss several differential distributions invariant mass leptons ${M}_{ll}$, pair rapidity ${Y}_{ll}$ lepton ${p}_{t,ll}$. In addition, we present two-dimensional ${\mathrm{log}}_{10}{x}_{Bj}$ ${\mathrm{log}}_{10}{Q}^{2}$ (${\mathrm{log}}_{10}W,{\mathrm{log}}_{10}{Q}^{2}$) arguments deep-inelastic structure functions. All presented results were obtained with modern parametrizations Limiting to small masses dielectrons one tests functions nonperturbative ${Q}^{2}$ and/or $W$. quantify difference different from literature. estimate gap survival factor experimental possibilities.