Hard thermal loops for soft or collinear external momenta - High Energy Physics - PhenomenologyReport as inadecuate




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Abstract: We consider finite temperature 1-loop diagrams with hard loop momenta and anarbitrary number of external gauge fields when the external momenta are eithersoft, or near the light cone and nearly collinear with the loop momentum. Weobtain a recursion relation for these diagrams which we translate into anequation for their generating functional. By integrating out the soft fieldswhile keeping two collinear ones we find an integral equation, originally dueto Arnold, Moore, and Yaffe, which sums the bremsstrahlung and pairannihilation contribution to the thermal photon production rate.



Author: Denis Besak, Dietrich Bodeker

Source: https://arxiv.org/







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