regularization of conformal correlators loriano bonora, sissa, trieste lt-11, varna june 15-21, 2015...
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Regularization of conformal correlators
Loriano Bonora, SISSA, Trieste
LT-11, Varna
June 15-21, 2015
Loriano Bonora, SISSA, Trieste
LT-11, Varna
June 15-21, 2015
This talk is about:
• Conformal invariance
• CFT correlators
• Their regularization
• Contact terms and anomalies
• Momentum space formalism
I will talk in particular about e.m. tensor correlators. Why are they so important?
Because the source of the e.m. tensor is the metric (or, better, the metric fluctuations). Thus the e.m. tensor correlators can be interpreted as scattering amplitudes for gravitons.
(C.Closset,D.Dumitrescu,G.Festuccia, Z.Komargodski,N.Seiberg,X.Camanho,J.Edelstein,J.Maldacena, G.Pimentel, A.Zhiboedov,…)
In momentum space the CA and conformal cohomology take a familiar form.
In particular contact terms can be studied in a rather simple way, because they are polynomials in the momenta.
Many Ward identities in momentum space have been solved exactly.
Now one can start a systematic (algorithmic) way to find all possible consistent contact terms.
Conclusions and prospects
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