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arXiv 2009.01374hep-th
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统一的六维非度规(1,0)张量-爱因斯坦超引力理论和(4,0)超引力

Unified non-metric (1,0) tensor-Einstein supergravity theories and (4,0) supergravity in six dimensions

Murat Gunaydin

摘要:

6d超共形代数OSp(8*)的超短酉(4,0)超多重态|8)约化为4d超共形代数SU(2,2)的CPT-自共轭超多重态|8)表示最大N=8超引力场。(4,0)多重态中的引力子由一个混合张量规范场描述,它不能与6d中的标准度规等同.此外,(4,0)超多重态可以作为(2,0)共形超多重态的双拷贝得到,其相互作用理论是非拉格朗日的。有人提出,一个相互作用的非度规(4,0)超引力理论可以描述5d最大超引力的强耦合相。在本文中,我们研究了在6d中存在相互作用的非度规(4,0)超引力的含义。(4,0)理论可以被截断为非度规(1,0)超引力耦合到5,8和14个自对偶张量多重态,从而简化为d=5时的三个统一魔法超引力理论。这意味着三个无限族的统一N=2,5d麦克斯韦-爱因斯坦超引力理论(MESGT)加上两个零星的,必须有提升到统一的非度量(1,0)张量爱因斯坦超引力理论在d=6。这些理论都具有非紧的整体对称群,在这些群下,所有的自对偶张量场,包括引力张量,都不可约地变换。这些理论中有四个是神奇的超引力理论的提升,其标量流形是对称空间。其他统一理论的标量流形不是齐次空间。我们还讨论了非度规统一$(1,0)$张量-爱因斯坦超引力理论的特殊场论公式,并得出了关于存在更高维的非度规超引力理论的推测,这些理论可以简化为$d=6$中的$(4,0)$理论。

英文摘要:

The ultrashort unitary (4,0) supermultiplet of 6d superconformal algebra OSp(8*|8) reduces to the CPT-self conjugate supermultiplet of 4d superconformal algebra SU(2,2|8) that represents the fields of maximal N=8 supergravity. The graviton in the (4,0) multiplet is described by a mixed tensor gauge field which can not be identified with the standard metric in 6d. Furthermore the (4,0) supermultiplet can be obtained as a double copy of (2,0) conformal supermultiplet whose interacting theories are non-Lagrangian. It had been suggested that an interacting non-metric (4,0) supergravity theory might describe the strongly coupled phase of 5d maximal supergravity. In this paper we study the implications of the existence of an interacting non-metric (4,0) supergravity in 6d. The (4,0) theory can be truncated to non-metric (1,0) supergravity coupled to 5,8 and 14 self-dual tensor multiplets that reduce to three of the unified magical supergravity theories in d=5. This implies that the three infinite families of unified N=2 , 5d Maxwell-Einstein supergravity theories (MESGTs) plus two sporadic ones must have uplifts to unified non-metric (1,0) tensor Einstein supergravity theories in d=6. These theories have non-compact global symmetry groups under which all the self-dual tensor fields including the gravitensor transform irreducibly. Four of these theories are uplifts of the magical supergravity theories whose scalar manifolds are symmetric spaces. The scalar manifolds of the other unified theories are not homogeneous spaces. We also discuss the exceptional field theoretic formulations of non-metric unified $(1,0)$ tensor-Einstein supergravity theories and conclude with speculations concerning the existence of higher dimensional non-metric supergravity theories that reduce to the $(4,0)$ theory in $d=6$.

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