Pion electromagnetic form factor at finite temperature.
نویسندگان
چکیده
Temperature effects on the electromagnetic couplings of pions in hot hadronic matter are studied with an effective chiral Lagrangian. We show that the Ward-Takahashi identity is satisfied at non-zero temperature in the soft pion limit. The in-medium electromagnetic form factor of the pion is obtained in the time-like region and shown to be reduced in magnitude, especially near the vector-meson resonance region. Finally, we discuss the consequences of this medium effect on dilepton production from hot hadronic matter. PACS: 25.75.+r, 14.40.Aq, 12.39.Fe, 12.40.Vv
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ورودعنوان ژورنال:
- Physical review. C, Nuclear physics
دوره 54 6 شماره
صفحات -
تاریخ انتشار 1996