A Megaxion at 750 GeV as a First Hint of Low Scale String Theory - INSPIRE

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A Megaxion at 750 GeV as a First Hint of Low Scale String Theory

Luis E. Ibanez
(
- Madrid, Autonoma U. and
- Madrid, IFT
)
,
Victor Martin-Lozano
(
- Madrid, Autonoma U. and
- Madrid, IFT
)

Dec 29, 2015

25 pages

Published in:

JHEP 07 (2016) 021

Published: Jul 5, 2016

e-Print:

1512.08777 [hep-ph]

DOI:

10.1007/JHEP07(2016)021

Report number:

IFT-UAM-CSIC-15-141,
FTUAM-15-45

View in:

ADS Abstract Service

reference search67 citations

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

_{s}

≃ 7-10

^{4}

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)

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