Higher excitations of $\omega$ and $\varphi$ in dilepton spectra

Abstract

We consider lepton pair production via two-hadron annihilation through various isoscalar vector mesons within hot, baryon-free matter. This is tantamount to constructing effective form factors which we model using a vector-meson-dominance approach and compare with experiment. In particular, we consider the reactions $\pi \rho \to e^{+}{e}^{-}$ and $\bar{K}{K}^{\ast }(892)$ + c.c. $\to e^{+}{e}^{-}$. We find that $\omega (1390)$ and $\varphi (1680)$ are visible in the mass spectrum for the thermal production rate above the ${\pi }^{+}{\pi }^{-}\to e^{+}{e}^{-}$ tail and even above the $\pi a_1\to e^{+}{e}^{-}$ results---both of which were considered important in their respective mass regions.

RevTeX, 9 pages, 6 (uuencoded) figures; to appear in Phys. Rev D

References in corpus (4)

• Lepton pairs from thermal mesons
• Role of the $a_1$ meson in dilepton production from hot hadronic matter
• On the mean free paths of pions and kaons in hot hadronic matter
• Properties of the phi meson at finite temperature

Cited by in corpus (7)

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• Dilepton production in proton-nucleus and nucleus-nucleus collisions at SPS energies
• Dilepton production in nucleus-nucleus collisions at top SPS energy within the Parton-Hadron-String Dynamics (PHSD) transport approach
• Intermediate-mass dilepton spectra and the role of secondary hadronic processes in heavy-ion collisions
• Intermediate-mass dilepton production in heavy-ion collisions at 200A GeV
• Off-shell effects in dilepton production from hot interacting mesons
• Intermediate mass dilepton production in heavy-ion collisions at SPS energies