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DTSTART:20250330T010000
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DTSTART;TZID=Europe/Ljubljana:20250529T140000
DTEND;TZID=Europe/Ljubljana:20250529T150000
DTSTAMP:20260423T024729
CREATED:20250424T114250Z
LAST-MODIFIED:20250529T121457Z
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SUMMARY:Anže Božič\, "Complexity of RNA sequences"
DESCRIPTION:https://indico.ijs.si/event/2913/
URL:https://web-f1.ijs.si/event/anze-bozic-complexity-of-rna-sequences/
LOCATION:A/1-106 – Seminarska soba fizike (F5) (Jamova)
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DTSTART;TZID=Europe/Ljubljana:20250529T153000
DTEND;TZID=Europe/Ljubljana:20250529T163000
DTSTAMP:20260423T024729
CREATED:20250406T185155Z
LAST-MODIFIED:20250529T140433Z
UID:56798-1748532600-1748536200@web-f1.ijs.si
SUMMARY:Motoo Suzuki: Small Instantons and the Post-Inflationary QCD Axion in a Special Product GUT
DESCRIPTION:In this talk\, after some review of axion physics\, I would like to discuss our recent work about a new framework of grand unification that is equipped with an axion solution to the strong CP problem without a domain wall problem when the Peccei–Quinn (PQ) symmetry is spontaneously broken after inflation. Our grand unified theory (GUT) is based on a symmetry breaking pattern\, SU(10) ×SU(5)1 →SU(5)V ⊃SU(3)C ×SU(2)L ×U(1)Y\, where SU(5)1 and a special embedding of SU(5)2 ⊂SU(10) are broken to a diagonal subgroup SU(5)V. The model contains a vector-like pair of PQ-charged fermions that transform as (anti-)fundamental representations under SU(10)\, so that the domain wall number is one. However\, after the GUT symmetry breaking\, the number of vector-like pairs of PQ-charged colored fermions is larger than one\, which seems to encounter the domain wall problem. This apparent inconsistency is resolved by small instanton effects on the axion potential which operate as a PQ-violating bias term and allow the decay of domain walls. We propose a domain-wall-free UV completion for an IR model where the domain wall number appears larger than one. The model gives a prediction for a dark matter axion window\, which is different from that of the ordinary post-inflationary QCD axion with domain wall number one.\nhttps://indico.ijs.si/event/2901/
URL:https://web-f1.ijs.si/event/motoo-suzuki/
LOCATION:https://zoom.us/j/3601731049?pwd=bVNQRjUxU2ExZ0cveWcxYXNUUGdjZz09 (A/1-106 – Seminarska soba fizike (F5))
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