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• W3203479694 abstract "A bstract We observe a direct relation between the existence of fundamental axionic strings, dubbed EFT strings, and infinite distance limits in 4d $$ mathcal{N} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>N</mml:mi> </mml:math> = 1 EFTs coupled to gravity. The backreaction of EFT strings can be interpreted as RG flow of their couplings, and allows one to probe different regimes within the field space of the theory. We propose that any 4d EFT infinite distance limit can be realised as an EFT string flow. We show that along such limits the EFT string becomes asymptotically tensionless, and so the EFT eventually breaks down. This provides an upper bound for the maximal field range of an EFT with a finite cut-off, and reproduces the Swampland Distance Conjecture from a bottom-up perspective. Even if there are typically other towers of particles becoming light, we propose that the mass of the leading tower scales as m 2 ∼ $$ mathcal{T} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>T</mml:mi> </mml:math> w in Planck units, with $$ mathcal{T} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>T</mml:mi> </mml:math> the EFT string tension and w a positive integer. Our results hold even in the presence of a non-trivial potential, as long as its energy scale remains well below the cut-off. We check both proposals for large classes of 4d $$ mathcal{N} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>N</mml:mi> </mml:math> = 1 string compactifications, finding that only the values w = 1 , 2 , 3 are realised." @default.
• W3203479694 created "2021-10-11" @default.
• W3203479694 creator A5002015269 @default.
• W3203479694 creator A5004998284 @default.
• W3203479694 creator A5042598895 @default.
• W3203479694 creator A5051167212 @default.
• W3203479694 date "2021-09-28" @default.
• W3203479694 modified "2023-10-01" @default.
• W3203479694 title "The EFT stringy viewpoint on large distances" @default.
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