TY - CONF AU - Kim, Jihn E. TI - CP-Conservation in QCD and why only 'invisible' Axions work IS - DESY-PROC-2016-03 CY - Hamburg PB - Verlag Deutsches Elektronen-Synchrotron M1 - PUBDB-2017-12145 M1 - DESY-PROC-2016-03 SN - 978-3-945931-06-6 T2 - DESY-PROC SP - 61-69 PY - 2017 AB - Among solutions of the strong CP problem, the "invisible" axion in the narrow axion window is argued to be the remaining possibility among natural solutions on the smallness of ―θ. Related to the gravity spoil of global symmetries, some prospective invisible axions from theory point of view are discussed. In all these discussions, including the observational possibility, cosmological constraints must be included. T2 - 12th Patras Workshop on Axions, WIMPs and WISPs CY - 20 Jun 2016 - 24 Jun 2016, Jeju Island (South Korea) Y2 - 20 Jun 2016 - 24 Jun 2016 M2 - Jeju Island, South Korea LB - PUB:(DE-HGF)29 ; PUB:(DE-HGF)8 ; PUB:(DE-HGF)7 DO - DOI:10.3204/DESY-PROC-2009-03/Kim_JihnE UR - https://bib-pubdb1.desy.de/record/395480 ER -