Lectures on Heterotic M-Theory
| dc.creator | Ovrut, Burt A. | |
| dc.date | 2002-01-06 | |
| dc.date.accessioned | 2026-07-07T04:12:56Z | |
| dc.date.available | 2026-07-07T04:12:56Z | |
| dc.description | We present three lectures on heterotic M-theory and a fourth lecture extending this theory to more general orbifolds. In Lecture 1, Horava-Witten theory is briefly discussed. We then compactify this theory on Calabi-Yau threefolds, choosing the "standard" embedding of the spin connection in the gauge connection. We derive, in detail, both the five-dimensional effective action and the associated actions of the four-dimensional "end-of-the-world" branes. Lecture 2 is devoted to showing that this theory naturally admits static, N=1 supersymmetry preserving BPS three-branes, the minimal vacuum having two such branes. One of these, the "visible" brane, is shown to support a three-generation E_6 grand unified theory, whereas the other emerges as the "hidden" brane with unbroken E_8 gauge group. Thus heterotic M-theory emerges as a fundamental paradigm for so-called "brane world" scenarios of particle physics. In Lecture 3, we introduce the concept of "non-standard" embeddings. These are shown to permit a vast generalization of allowed vacua, leading on the visible brane to new grand unified theories, such as SO(10) and SU(5), and to the standard model SU(3)_C X SU(2)_L X U(1)_Y. It is demonstrated that non-standard embeddings generically imply the existence of five-branes in the bulk space. The physical properties of these bulk branes is discussed in detail. Finally, in Lecture 4 we move beyond Horava-Witten theory and consider orbifolds larger than S^1/Z_2. For explicitness, we consider M-theory orbifolds on S^1/Z_2 X T^4/Z_2, discussing their anomaly structure in detail and completely determining both the untwisted and twisted sector spectra. | |
| dc.description | 48 pages, Lectures presented at the TASI 2000 School on Strings, Branes and Extra Dimensions, Boulder, Co, June 3-29, 2001 | |
| dc.identifier | https://arxiv.org/abs/hep-th/0201032 | |
| dc.identifier | http://arxiv.org/abs/hep-th/0201032 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/51081 | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Lectures on Heterotic M-Theory | |
| dc.type | text |