The QCD axion and moduli stabilisation

By Joseph P. Conlon. 2006

375 citations recorded by the source corpus.

We investigate the conditions for a QCD axion to coexist with stabilised moduli in string compactifications. We show how the simplest approaches to moduli stabilisation give unacceptably large masses to the axions. We observe that solving the F-term equations is insufficient for realistic moduli stabilisation and give a no-go theorem on supersymmetric moduli stabilisation with unfixed axions applicable to all string compactifications and relevant to much current work. We demonstrate how nonsupersymmetric moduli stabilisation with unfixed axions can be realised. We finally outline how to stabilise the moduli such that fa is within the allowed window 109GeV < fa < 1012 GeV, with fa ~ (MSUSYMP)1/2.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/3db746d9d07bcdde7d41732c21ea688839b6e003

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In Nuclear and High Energy Physics

1. Eran Palti
2. Ralph Blumenhagen
3. M. Cicoli
4. A. Ringwald
5. F. Quevedo
6. Joseph P. Conlon
7. D. Lust
8. J. Redondo

Citations in the corpus

• Soft SUSY breaking terms for chiral matter in IIB string compactifications (2006, background): “The scenario also naturally generates an axion decay constant within the allowed window [51].”
• General analysis of LARGE Volume Scenarios with string loop moduli stabilisation (2008, methodology): “Also this is a good example to explore the issue about stabilisation of the Standard Model cycle that has to be small (and then a blow-up mode) but without the presence of a non-perturbative superpotential which is not desired if the corresponding axion is the QCD axion [19] and if D-terms could ind”
• Black hole formation from axion stars (2016, background): “Mpl [35, 49],3 and for the QCD axion is bounded experimentally to fa & 109 GeV [51].”
• Moduli Stabilisation versus Chirality for MSSM like Type IIB Orientifolds (2007, background): “Arguments have been given that this should occur for the QCD axion [60].”
• The landscape of QCD axion models (2020, neutral): “[738, 739, 779, 780].”
• Four-dimensional string compactifications with D-branes, orientifolds and fluxes (2006, background): “They could possibly serve as dark matter or quintessence candidates [54, 55, 56, 57].”
• New experimental approaches in the search for axion-like particles (2018, background): “The PQ mechanism can be easily embedded also in SUSY [17], GUTs [18] and most notably it is built in string theory in a model-independent way [19, 20].”
• Systematics of string loop corrections in type IIB Calabi-Yau flux compactifications (2007, background): “For a brane wrapping a cycle τ , the value of τ is the gauge coupling for branes wrapping the cycle, and we expect loop corrections involving those branes to involve a suppression, relative to tree-level terms, by a factor of τ (see [15] for related arguments).”
• Weak gravity strongly constrains large-field axion inflation (2015, background): “This may be realized by string theory axions, for example [9, 10].”
• Exploring the Role of Axions and Other WISPs in the Dark Universe (2012, background): “In fact, it has long been known that the 4D low-energy effective field theory emerging string theory predicts natural candidates for the QCD axion [16, 17, 18], often even an ‘axiverse’ [19, 20, 21, 22] containing many additional light ALPs whose masses are evenly distributed in log scale.”