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X-WR-CALDESC:Events for Instituto de Física Teórica
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DTSTART;TZID=Europe/Madrid:20260604T120000
DTEND;TZID=Europe/Madrid:20260604T130000
DTSTAMP:20260706T210020
CREATED:20260529T081413Z
LAST-MODIFIED:20260529T081413Z
UID:25114-1780574400-1780578000@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'Sharpened Dynamical Cobordism'
DESCRIPTION:Strings\, Pheno and the Swampland (SPS) Journal Club \n\n\nTitle: Sharpened Dynamical Cobordism\n\nSpeaker: Alejandro Javier Puga Gómez (IFT) \n\nVenue&Time: Red Room / 12:00\n \nAbstract: We propose a sharpened version of Dynamical Cobordism\, where the physical structure ξ of the theory in question determines an allowed range Rξ for the critical exponent δ. We interpret a singularity with δ∈Rξ as a true transition-to-nothing\, i.e.\, a configuration ending spacetime\, while a singularity with δ∉Rξ indicates some obstruction to such a transition\, i.e.\, the presence of a non-trivial cobordism global charge\, which is incompatible with a theory of quantum gravity. In the spirit of the original Cobordism Conjecture\, this apparent inconsistency of the theory can be alleviated via the modification of the structure\, for instance by introducing new degrees of freedom and associated defects. Inspired by the Gubser criterion for good singularities\, we propose a way to determine Rξ. As a proof-of-concept we show explicitly how the introduction of a higher-form gauge field changes the allowed range of δ compared to an EFT with only scalars. We test this sharpened version of Dynamical Cobordism against several examples\, such as massive IIA string theory\, where it is notably compatible with the presence of O8-planes; the Janis-Newman-Winicour and Garfinkle-Horowitz-Strominger black hole solutions; and certain singular distributions of D-branes. In all these cases\, the Sharpened Dynamical Cobordism Conjecture leads to results consistent with our expectations.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-sharpened-dynamical-cobordism/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
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DTSTART;TZID=Europe/Madrid:20260604T120000
DTEND;TZID=Europe/Madrid:20260604T130000
DTSTAMP:20260706T210020
CREATED:20260529T081532Z
LAST-MODIFIED:20260529T081532Z
UID:25116-1780574400-1780578000@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club
DESCRIPTION:Every Thursday at 12:00 in Grey Room 2.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-16/
LOCATION:Grey Room 2\, Instituto de Física Teórica\, Madrid\, Madrid\, 28037\, Spain
CATEGORIES:Journal clubs,Scientific activities
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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260604T170000
DTEND;TZID=Europe/Madrid:20260604T180000
DTSTAMP:20260706T210020
CREATED:20260601T180607Z
LAST-MODIFIED:20260601T180607Z
UID:25133-1780592400-1780596000@www.ift.uam-csic.es
SUMMARY:Old Journal Club: 'Cosmological Lower Bound on Heavy-Neutrino Masses'
DESCRIPTION:Valeria Costa (IFT) will present: Cosmological Lower Bound on Heavy-Neutrino Masses\, de B. W. Lee y S. Weinberg. \nVenue&Time: Blue Room / 17:00 \nAbstract: \nThe present cosmic mass density of possible-stable neutral heavy leptons is calculated in a standard cosmological model. In order for this density not to exceed the upper limit of 2*10^-29 g/cm^3\, the lepton mass would have to be greater than a lower bound of the order of 2 GeV.
URL:https://www.ift.uam-csic.es/event/old-journal-club-cosmological-lower-bound-on-heavy-neutrino-masses/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
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