BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Patrick Draper (University of Illinois) DTSTART:20211005T183000Z DTEND:20211005T193000Z DTSTAMP:20260423T024559Z UID:nhetc/26 DESCRIPTION:Title: T he CKN Bound and Particle Physics\nby Patrick Draper (University of Il linois) as part of NHETC Seminar\n\n\nAbstract\nThe holographic principle implies that quantum field theory overcounts the number of independent deg rees of freedom in quantum gravity. An argument due to Cohen\, Kaplan\, an d Nelson (CKN) suggests that the number of degrees of freedom well-describ ed by QFT is even smaller than required by holographic bounds\, and CKN in terpreted this result as indicative of a correlation between the UV and IR cutoffs on QFT. We consider an alternative interpretation in which the QF T degrees of freedom are depleted as a function of scale\, and we use a si mple recipe to estimate the impact of depleted densities of states on prec ision observables. Although these observables are not sensitive to the lev el of depletion motivated by gravitational considerations\, the phenomenol ogical exercises also provide an interesting test of QFT that is independe nt of underlying quantum gravity assumptions. A depleted density of states can also render the QFT vacuum energy UV-insensitive\, reconciling the su ccess of QFT in describing ordinary particle physics processes and its app arent failure in predicting the cosmological constant.\n LOCATION:https://researchseminars.org/talk/nhetc/26/ END:VEVENT END:VCALENDAR