Axions and ALPs: a very short introduction

Marsh, David J. E.

Report/Contribution to a conference proceedings/Contribution to a book

PUBDB-2018-01745

Axions and ALPs: a very short introduction

Marsh, D. J. E. (Corresponding author)

2018
Verlag Deutsches Elektronen-Synchrotron Hamburg
ISBN: 978-3-945931-17-2

Marsh, David J. E. "Axions and ALPs: a very short introduction" in Proceedings of the 13th "Patras" Workshop on Axions, WIMPs and WISPs, PATRAS 2017 / Maroudas, Marios (eds.), Verlag Deutsches Elektronen-Synchrotron : 2018 ; Patras 2017 : 13th Patras Workshop on Axions, WIMPs and WISPs, 2017-05-15 - 2017-05-19, Thessaloniki
13th Patras Workshop on Axions, WIMPs and WISPs, AXION-WIMP 2017, Thessaloniki, Greece, 15 May 2017 - 19 May 2017 Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-PROC 59-74 (2018) [10.3204/DESY-PROC-2017-02/marsh_david]

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Please use a persistent id in citations: doi:10.3204/DESY-PROC-2017-02/marsh_david

Report No.: DESY-PROC-2017-02

Abstract: The QCD axion was originally predicted as a dynamical solution to the strong CP problem. Axion like particles (ALPs) are also a generic prediction of many high energy physics models including string theory. Theoretical models for axions are reviewed, giving a generic multi-axion action with couplings to the standard model. The couplings and masses of these axions can span many orders of magnitude, and cosmology leads us to consider several distinct populations of axions behaving as coherent condensates, or relativistic particles. Light, stable axions are a mainstay dark matter candidate. Axion cosmology and calculation of the relic density are reviewed. A very brief survey is given of the phenomenology of axions arising from their direct couplings to the standard model, and their distinctive gravitational interactions.

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