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Title: IIB string theory explored: Reflection 7-branes

Journal Article · · Physical Review. D.
ORCiD logo [1];  [2];  [3];  [4]
  1. Ludwig Maximilian Univ. of Munich, Munich (Germany)
  2. Univ. of Pennsylvania, Philadelphia, PA (United States); Harvard Univ., Cambridge, MA (United States)
  3. Harvard Univ., Cambridge, MA (United States)
  4. Univ. of Pennsylvania, Philadelphia, PA (United States)

The swampland cobordism conjecture successfully predicts the supersymmetric spectrum of 7-branes of IIB/F-theory. Including reflections on the F-theory torus, it also predicts the existence of new nonsupersymmetric objects, which we dub reflection 7-branes (R7-branes). We present evidence that these R7-branes only exist at strong coupling. R7-branes serve as end of the world branes for 9D theories obtained from type IIB asymmetric orbifold and Dabholkar-Park orientifold backgrounds, and an anomaly inflow analysis suggests the existence of a gapless Weyl fermion, which would have the quantum numbers of a goldstino. Using general arguments, we conclude that different kinds of branes are able to end on the R7, and accounting for their charge requires exotic localized degrees of freedom, for which the simplest possibility is a massless 3-form field on the R7-brane worldvolume. We also show how to generalize the standard F-theory formalism to account for reflections.

Research Organization:
Univ. of Pennsylvania, Philadelphia, PA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); Simons Foundation
Grant/Contract Number:
SC0013528; PHY-1607611; PHY-2013858; 602883
OSTI ID:
1971559
Alternate ID(s):
OSTI ID: 2420286
Journal Information:
Physical Review. D., Vol. 107, Issue 8; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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F-theory
  • Weigand, Timo
  • Proceedings of Theoretical Advanced Study Institute Summer School 2017 "Physics at the Fundamental Frontier" — PoS(TASI2017) https://doi.org/10.22323/1.305.0016
conference September 2018

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