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arXiv 2209.06173hep-th
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无能级匹配条件的闭弦场论

Closed string field theory without the level-matching condition

Yuji Okawa, Ryosuke Sakaguchi

摘要:

在建立协变闭弦场论时,我们总是使用具有能级匹配条件的闭弦场。最近,包括拉蒙扇区的开超弦场论被构建出来,其中一种方法是使用开超弦场,其约束类似于闭弦场的能级匹配条件。还有另一种方法开发的森,其中没有约束施加在开放超弦领域,但额外的自由弦领域的介绍,使协变动力学项的拉蒙部门的建设。受这种发展的启发,我们构造了闭弦场论,而不对闭弦场施加能级匹配条件,同时我们引入了一个额外的自由弦场。这是在弦论的背景下,在不使用能级匹配条件的情况下,广义协方差的第一个实现。我们显式地扩展弦场的水平相关的无质量的领域,我们确认的等价性理论与水平匹配的条件下解耦的自由领域。

英文摘要:

In formulating covariant closed string field theories, we have always used closed string fields with the level-matching condition. Recently, open superstring field theories including the Ramond sector were constructed, and one approach was to use open superstring fields with a constraint analogous to the level-matching condition for closed string fields. There is another approach developed by Sen, where no constraints are imposed on open superstring fields but additional free string fields are introduced so that covariant kinetic terms for the Ramond sector were constructed. Motivated by this development, we construct closed string field theory without imposing the level-matching condition on the closed string field, while we introduce an additional free string field. This is the first implementation of general covariance in the context of string theory without using the level-matching condition. We explicitly expand the string fields up to the level relevant to massless fields, and we confirm the equivalence to the theory with the level-matching condition up to decoupled free fields.

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