A Megaxion at 750 GeV as a First Hint of Low Scale String Theory
Dec 29, 2015
25 pages
Published in:
- JHEP 07 (2016) 021
- Published: Jul 5, 2016
e-Print:
- 1512.08777 [hep-ph]
Report number:
- IFT-UAM-CSIC-15-141,
- FTUAM-15-45
View in:
Citations per year
Abstract: (Springer)
Low scale string models naturally have axion-like pseudoscalars which couple directly to gluons and photons (but not W ’s) at tree level. We show how they typically get tree level masses in the presence of closed string fluxes , consistent with the axion discrete gauge symmetry, in a way akin of the axion monodromy of string inflation and relaxion models. We discuss the possibility that the hints for a resonance at 750 GeV recently reported at ATLAS and CMS could correspond to such a heavy axion state (megaxion). Adjusting the production rate and branching ratios suggest the string scale to be of order M ≃ 7-10 TeV, depending on the compactification geometry. If this interpretation was correct, one extra Z’ gauge boson could be produced before reaching the string threshold at LHC and future colliders.Note:
- 26 pages, 3 figures, 1 Megaxion
- Strings and branes phenomenology
- string: closed
- symmetry: discrete
- tree approximation
- compactification
- branching ratio
- inflation
- monodromy
- energy: low
- axion-like particles
References(161)
Figures(3)
- [1]
- [2]
- [3]
- [4]
- [5]
- [6]
- [7]
- [8]
- [9]
- [10]
- [11]
- [12]
- [13]
- [14]
- [14]
- [14]
- [14]
- [14]
- [14]
- [14]
- [14]
- [14]
- [14]
- [14]
- [14]