کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1843321 1645175 2006 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comments on the high energy limit of bosonic open string theory
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
پیش نمایش صفحه اول مقاله
Comments on the high energy limit of bosonic open string theory
چکیده انگلیسی
In previous works, ratios among four-point scattering amplitudes at the leading order in the high-energy limit were derived for the bosonic open string theory. The derivation was based on Ward identities derived from the decoupling of zero-norm states and was purely algebraic. The only assumption of the derivation was that the momentum polarization can be approximated by the longitudinal polarization at high energies. In this paper, using the decoupling of spurious states, we reduce this assumption to a much weaker one which can be easily verified by simple power counting in most cases. For the special cases which are less obvious, we verify the new assumption for an example by saddle-point approximation. We also provide a new perspective to our previous results in terms of DDF states. In particular, we show that, by using DDF states, one can easily see that there is only one independent high energy scattering amplitude for each fixed mass level.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics B - Volume 749, Issues 1–3, 14 August 2006, Pages 266-279
نویسندگان
, , , , ,