Higher Level String Resonances in Four Dimensions

Details Higher Level String Resonances in Four Dimensions Higher Level String Resonances in Four Dimensions

2011-10-05

arxiv.org/abs/1110.1087v2

Nucl.Phys.B 856 (2012) 247-277

Physics

High Energy Physics

High Energy Physics - Theory

34 pages, 2 figures

Scientific paper

10.1016/j.nuclphysb.2011.11.004

We study higher level Regge resonances of open superstrings, focusing on the universal part of the Neveu-Schwarz sector common to all D-brane realizations of the standard model. For Regge states with masses far above the fundamental string scale, we discuss the spin-dependence of their decay rates into massless gauge bosons. Extending our previous work on lowest level string excitations, we study the second mass level at which spins range from 0 to 3. We construct the respective vertex operators and compute the amplitudes involving one massive particle and two or three gauge bosons. To illustrate the use of BCFW recursion relations in superstring theory, we build the four gluon amplitude from on-shell amplitudes involving string resonances and gauge bosons.

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