TY - JOUR
T1 - The QCD axion from aligned axions and diphoton excess
AU - Higaki, Tetsutaro
AU - Jeong, Kwang Sik
AU - Kitajima, Naoya
AU - Takahashi, Fuminobu
N1 - Funding Information:
This work is supported by MEXT KAKENHI Grant Numbers 15H05889 (F.T.) and 23104008 (F.T.), JSPS KAKENHI Grant Numbers 24740135 (F.T.), 26247042 (F.T. and T.H.), and 26287039 (F.T.), World Premier International Research Center Initiative (WPI Initiative), MEXT , Japan (F.T.), and MEXT -Supported Program for the Strategic Research Foundation at Private Universities, “Topological Science”, Grant Number S1511006 (T.H.), the Max-Planck-Gesellschaft , the Korea Ministry of Education, Science and Technology , Gyeongsangbuk-Do and Pohang City for the support of the Independent Junior Research Group at the Asia Pacific Center for Theoretical Physics (N.K.). This work is also supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) ( NRF-2015R1D1A3A01019746 ) (K.S.J.).
Publisher Copyright:
© 2016 Published by Elsevier B.V.
PY - 2016/4/10
Y1 - 2016/4/10
N2 - 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.
AB - 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.
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U2 - 10.1016/j.physletb.2016.01.055
DO - 10.1016/j.physletb.2016.01.055
M3 - Article
AN - SCOPUS:84956671511
SN - 0370-2693
VL - 755
SP - 13
EP - 16
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -