An Orientifold of type IIB theory on K3

Dabholkar, Atish; Park, Jaemo

doi:10.1016/0550-3213(96)00199-X

An Orientifold of type IIB theory on K3

Atish Dabholkar
(
- Caltech
)
,
Jaemo Park
(
- Caltech
)

Feb, 1996

19 pages

Published in:

Nucl.Phys.B 472 (1996) 207-220

e-Print:

hep-th/9602030 [hep-th]

DOI:

10.1016/0550-3213(96)00199-X

Report number:

CALT-68-2038

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Abstract:

A new orientifold of Type-IIB theory on

K3

is constructed that has

N=1

supersymmetry in six dimensions. The orientifold symmetry consists of a

Z_2

involution of

K3

combined with orientation-reversal on the worldsheet. The closed-string sector in the resulting theory contains nine tensor multiplets and twelve neutral hypermultiplets in addition to the gravity multiplet, and is anomaly-free by itself. The open-string sector contains only 5-branes and gives rise to maximal gauge groups

SO(16)

or

U(8)\times U(8)

at different points in the moduli space. Anomalies are canceled by a generalization of the Green-Schwarz mechanism that involves more than one tensor multiplets.

Note:

19 pages, harvmac Report-no: CALT-68-2038

string model
supersymmetry
orbifold
anomaly: gravitation
membrane model
group theory: representation

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