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UID:2137@qft.physik.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20240612T133000
DTEND;TZID=Europe/Berlin:20240612T143000
DTSTAMP:20240612T130256Z
URL:https://qft.physik.hu-berlin.de/next-seminars/filippo-fecit-on-massive
 -gravity-in-the-worldline-formalism/
SUMMARY:Filippo Fecit on "Massive Gravity in the Worldline Formalism" - 
DESCRIPTION:Speaker: Filippo Fecit (University of Bologna).\n\nTitle: Massi
 ve Gravity in the Worldline Formalism\nAbstract: Despite the considerable 
 success of General Relativity\, the search for alternatives has been an on
 going challenge since its formulation to address some of the most crucial 
 open questions in physics\, such as the cosmological constant problem and 
 the origin of the late-time acceleration of the universe. An intriguing mo
 dification suggests that gravity could be propagated by a massive spin 2 p
 article: a massive graviton.\,\, \,\,In this talk\, I will present a novel
  discussion from a worldline perspective\, employing the first-quantized m
 odels known as O(N) spinning particles. Specifically\, our focus will be o
 n the massive N=4 spinning particle. First\, I will show that BRST quantiz
 ation allows for the correct reproduction of the Fierz-Pauli theory on Min
 kowski. The extension to curved spacetime is trickier\, and nilpotency of 
 the BRST charge seems to require a Ricci-flat spacetime as the only consis
 tent background. Once the BRST system is realized\, it is possible to cons
 truct the worldline path integral on the circle\, providing a worldline re
 presentation of the one-loop effective action of Linearized Massive Gravit
 y. If time permits\, I will discuss the calculation of the Seeley-DeWitt c
 oefficients\, including the a_3(D) coefficient previously not known in the
  literature.\n\nThis talk will be in hybrid mode via zoom\, please contact
  the seminar organisers to obtain the password.\n\nTo receive seminar anno
 uncements via email\, please request a subscription to the mailing list qf
 t-seminars-physics. This is done by sending an email to sympa@lists.hu-ber
 lin.de with subject line "subscribe qft-seminars-physics FIRSTNAME LASTNAM
 E".
CATEGORIES:Pizza Seminars
LOCATION:Room 1.221\, IRIS building\, Zum großen Windkanal 6\, Berlin\, 12
 489\, Germany
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 erlin\, 12489\, Germany;X-APPLE-RADIUS=100;X-TITLE=Room 1.221\, IRIS build
 ing:geo:0,0
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