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Footprints of New Strong Dynamics via Anomaly and the 750 GeV Diphoton

Yuichiro Nakai, Ryosuke Sato, and Kohsaku Tobioka
Phys. Rev. Lett. 116, 151802 – Published 12 April 2016
Physics logo See Synopsis: Explaining a 750 GeV Bump

Abstract

The chiral anomaly provides smoking-gun evidence of a new confining gauge theory. Motivated by a reported event excess in a diphoton invariant mass distribution at the LHC, we discuss a scenario that a pseudo-Nambu-Goldstone (PNG) boson of a new QCD-like theory is produced by gluon fusion and decays into a pair of the standard model gauge bosons. Despite the strong dynamics, the production cross section and the decay widths are determined by an anomaly matching condition. The excess can be explained by the PNG boson with mass of around 750 GeV. The model also predicts exotic hadrons such as a color-octet scalar and baryons. Some of them are within the reach of the LHC experiment.

  • Figure
  • Figure
  • Received 18 December 2015

DOI:https://doi.org/10.1103/PhysRevLett.116.151802

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Particles & Fields

Synopsis

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Explaining a 750 GeV Bump

Published 12 April 2016

Theorists try to explain data from the LHC that could be hinting at the existence of new particles.

See more in Physics

Authors & Affiliations

Yuichiro Nakai1, Ryosuke Sato2,3, and Kohsaku Tobioka2,3,4

  • 1Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
  • 2Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
  • 3Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
  • 4Raymond and Beverly Sackler School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv 69978, Israel

See Also

Pseudoscalar Decaying Only via Loops as an Explanation for the 750 GeV Diphoton Excess

Gang Li, Ying-nan Mao, Yi-Lei Tang, Chen Zhang, Yang Zhou, and Shou-hua Zhu
Phys. Rev. Lett. 116, 151803 (2016)

750 GeV Diphoton Excess from the Goldstino Superpartner

Christoffer Petersson and Riccardo Torre
Phys. Rev. Lett. 116, 151804 (2016)

750 GeV Diphoton Excess May Not Imply a 750 GeV Resonance

Won Sang Cho, Doojin Kim, Kyoungchul Kong, Sung Hak Lim, Konstantin T. Matchev, Jong-Chul Park, and Myeonghun Park
Phys. Rev. Lett. 116, 151805 (2016)

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Vol. 116, Iss. 15 — 15 April 2016

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