Dressed hard states and black hole soft hair

Mehrdad Mirbabayi, Massimo Porrati

    Research output: Contribution to journalArticlepeer-review


    A recent, intriguing Letter by Hawking, Perry, and Strominger suggests that soft photons and gravitons can be regarded as black hole hair and may be relevant to the black hole information paradox. In this Letter we make use of factorization theorems for infrared divergences of the S matrix to argue that by appropriately dressing in and out hard states, the soft-quanta-dependent part of the S matrix becomes essentially trivial. The information paradox can be fully formulated in terms of dressed hard states, which do not depend on soft quanta.

    Original languageEnglish (US)
    Article number211301
    JournalPhysical Review Letters
    Issue number21
    StatePublished - Nov 16 2016

    ASJC Scopus subject areas

    • General Physics and Astronomy


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