Finite temperature pion vector form factors in chiral perturbation theory



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Llanes Estrada, Felipe José and Gómez Nicola, Ángel and Peláez Sagredo, José Ramón (2005) Finite temperature pion vector form factors in chiral perturbation theory. Physics Letters B, 606 . pp. 351-360. ISSN 0370-2693

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We discuss the thermal behaviour of the pion vector form factors and calculate them in one-loop chiral perturbation theory. The perturbative result is used to analyze the T dependent electromagnetic pion charge radius, obtaining a rough estimate of the deconfinement critical temperature. Imposing thermal unitarity, we generate the ρ resonance pole for the form factor in the center of mass frame. The ρ peak height in the modulus of the form factor decreasesfor increasing temperature, while its width increases and the peak position is slightly shifted downwards for T _ 150 MeV. These results point in the direction suggested by many analysis of dilepton production data in relativistic heavy ion collisions.

Item Type:Article
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© 2004 Elsevier B.V. All rights reserved.
Work supported from the Spanish CICYT projects, FPA2000 0956, PB98-0782 and BFM2000-1326.

Uncontrolled Keywords:Cross-Section Measurements, Inverse Amplitude Method, Heavy-Ion Collisions, Symmetry Restoration, Phase Transition, Nuclear-Matter, Au Collisions, Cern Sps, One-Loop, Scattering
Subjects:Sciences > Physics
ID Code:23305
Deposited On:22 Oct 2013 18:50
Last Modified:31 Dec 2020 00:01

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