750 GeV diphotons from closed string states

Anchordoqui, Luis A.; Antoniadis, Ignatios; Goldberg, Haim; Huang, Xing; Lüst, Dieter; Taylor, Tomasz R. (2016). 750 GeV diphotons from closed string states. Physics letters. B, 755, pp. 312-315. Elsevier 10.1016/j.physletb.2016.02.024

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We show that low-mass-scale string compactifications, with a generic D-brane configuration that realizes the standard model by open strings, can explain the relatively broad peak in the diphoton invariant mass spectrum at 750 GeV recently reported by the ATLAS and CMS Collaborations. Under reasonable assumptions, we demonstrate that the excess could originate from a closed string (possibly axionic) excitation φ that has a coupling with gauge kinetic terms. We estimate the φ production rate from photon–photon fusion in elastic pp scattering, using the effective photon and narrow width approximations. For string scales above today’s lower limit Ms ≈ 7 TeV, we can accommodate the diphoton rate observed at Run II while maintaining consistency with Run I data.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Antoniadis, Ignatios

Subjects:

500 Science > 530 Physics

ISSN:

0370-2693

Publisher:

Elsevier

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

07 Sep 2016 10:51

Last Modified:

07 Sep 2016 10:51

Publisher DOI:

10.1016/j.physletb.2016.02.024

ArXiv ID:

1512.08502

BORIS DOI:

10.7892/boris.86324

URI:

https://boris.unibe.ch/id/eprint/86324

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