  Using q-theory, we show that the electroweak crossover can generate a remnant
vacuum energy density \Lambda \sim E_{ew}^8 / E_{planck}^4, with effective
electroweak energy scale E_{ew} \sim 10^{3} GeV and reduced Planck-energy scale
E_{planck} \sim 10^{18} GeV. The obtained expression for the effective
cosmological constant \Lambda may be a crucial input for the suggested solution
by Arkani-Hamed et al. of the triple cosmic coincidence puzzle (why the orders
of magnitude of the energy densities of vacuum, matter, and radiation are
approximately the same in the present Universe).
