The QCD Axion from Aligned Axions and Diphoton Excess

By Tetsutaro Higaki, K. Jeong, N. Kitajima, F. Takahashi. 2015

152 citations recorded by the source corpus.

Abstract We argue that the QCD axion can arise from many aligned axions with decay constants much smaller than the conventional axion window. If the typical decay constant is of O ( 100 )  GeV to 1  TeV , one or more of the axions or saxions may account for the recently found diphoton excess at ∼ 750  GeV . Our scenario predicts many axions and saxions coupled to gluons with decay constants of order the weak scale, and therefore many collider signatures by heavy axions and saxions will show up at different energy scales. In particular, if the inferred broad decay width is due to multiple axions or saxions, a non-trivial peak structure may become evident when more data is collected. We also discuss cosmological implications of the aligned QCD axion scenario. In the Appendix we give a possible UV completion and argue that the high quality of the Peccei–Quinn symmetry is naturally explained in our scenario.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/f0b1d6e0873f7b5a900c0d7d2fb6c7c3634d30f9

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Luca Visinelli
2. L. Luzio
3. Kiwoon Choi
4. E. Nardi
5. Sang Hui Im
6. C. Shin
7. Duccio Pappadopulo
8. Andrea Tesi

In Nuclear and High Energy Physics

1. Luca Visinelli
2. L. Luzio
3. E. Nardi
4. Andrea Tesi
5. Kiwoon Choi
6. Sang Hui Im
7. C. Shin
8. Duccio Pappadopulo

Citations in the corpus

• Recent Progress in the Physics of Axions and Axion-Like Particles (2020, background): “i) the photophilic limit with cB,W cG,q [95–99], ii) the nucleophilic limit with cq cG,W,B [98–100], and iii) the leptophilic limit with ce cG,q [99, 101].”
• The landscape of QCD axion models (2020, background): “[541] (see also [542, 543]) and is based on a KSVZ type of model.”
• The photo-philic QCD axion (2016, background): “Writing a generic eigenvector of the matrix (5)The observation the a clockwork axion can solve the strong CP problem is also found in [29].”
• Phenomenology of a 750 GeV singlet (2015, background): “The other remark is that, generically, integrating out vector-like quarks at one loop yields effective couplings not only to photons and gluons but also to ZZ, Zγ, and WW [10, 19, 21].”