Transitions of orbifold vacua

Kang Sin Choi; Tatsuo Kobayashi

doi:10.1007/JHEP07(2019)111

Transitions of orbifold vacua

Kang Sin Choi, Tatsuo Kobayashi

Scranton Honors Program

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

We study the global structure of vacua of heterotic strings compactified on orbifolds T⁴/ℤ_N (N = 2, 3) in the presence of heterotic 5-branes. Gauge symmetry breaking associated with orbifold is described by instantons in the field theory. There is phase transition between small (zero size limit) instantons and heterotic 5-branes. This mechanism provides top-down, stringy account to the spectrum and modular invariance condition of non-perturbative vacua with 5-branes. Also it takes us from one vacuum to another by emitting and absorbing instantons. This means that many vacua with different gauge theories are in fact connected and are inherited from perturbative vacua. It follows that there is also transition of twisted instantons at the fixed points. Thus we can understand transitions among perturbative vacua as well.

Original language	English
Article number	111
Journal	Journal of High Energy Physics
Volume	2019
Issue number	7
DOIs	https://doi.org/10.1007/JHEP07(2019)111
State	Published - 1 Jul 2019

Bibliographical note

Publisher Copyright:
© 2019, The Author(s).

Keywords

Brane Dynamics in Gauge Theories
Superstring Vacua
Superstrings and Heterotic Strings

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10.1007/JHEP07(2019)111

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AB - We study the global structure of vacua of heterotic strings compactified on orbifolds T4/ℤN (N = 2, 3) in the presence of heterotic 5-branes. Gauge symmetry breaking associated with orbifold is described by instantons in the field theory. There is phase transition between small (zero size limit) instantons and heterotic 5-branes. This mechanism provides top-down, stringy account to the spectrum and modular invariance condition of non-perturbative vacua with 5-branes. Also it takes us from one vacuum to another by emitting and absorbing instantons. This means that many vacua with different gauge theories are in fact connected and are inherited from perturbative vacua. It follows that there is also transition of twisted instantons at the fixed points. Thus we can understand transitions among perturbative vacua as well.

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Transitions of orbifold vacua

Abstract

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