Q-branes in type IIB supergravity

✍ Scribed by E.A. Bergshoeff; J. Hartong; D. Sorokin

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 176 KB
• Volume: 56
• Category: Article
• ISSN: 0015-8208
• DOI: 10.1002/prop.200810550

✦ Synopsis

Abstract

The notion of Q7‐branes and Q‐instantons is introduced. These are one‐half BPS solutions of the type IIB supergravity theory characterized by a set of three parameters p,q,r such that r^2>4pq. The numbers p,q,r parameterize the electric and magnetic couplings of, respectively, the Q7‐branes and Q‐instantons to a triplet of 8‐forms. The (p,q) 7‐branes and instantons including the D7‐brane and the D‐instanton have r^2^ = 4pq. Seven‐brane solutions containing Q7‐branes are discussed and the Q‐instanton on‐shell action is computed. The Q7‐branes are either novel bound states of a (p,q) 7‐brane and a (p′,q′) 7‐brane with (p,q) ≠ (p′,q′) or they form an independent new object in the theory.