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pro vyhledávání: '"Reece, Matthew A"'
The sensitivity of electron EDM experiments has been increasing at a rapid pace, and could yield indications of new physics in the coming decade. An intriguing possibility is that an EDM signal could be generated by new, electroweak-charged particles
Externí odkaz:
http://arxiv.org/abs/2410.01873
Gauge theories in $d$ dimensions with a nontrivial fundamental group admit a $(d-3)$-form magnetic symmetry and a $(d-5)$-form instantonic symmetry. These are examples of Chern-Weil symmetries, with conserved currents built out of the gauge field str
Externí odkaz:
http://arxiv.org/abs/2408.00067
Autor:
Reece, Matthew
Axions arising as modes of higher-dimensional gauge fields are known to offer a compelling solution to the axion quality problem and to naturally arise in string theory. In this context, it is interesting to ask how we would interpret an experimental
Externí odkaz:
http://arxiv.org/abs/2406.08543
Spontaneous breaking of symmetries leads to universal phenomena. We extend this notion to $(-1)$-form U(1) symmetries. The spontaneous breaking is diagnosed by a dependence of the vacuum energy on a constant background field $\theta$, which can be pr
Externí odkaz:
http://arxiv.org/abs/2402.00117
Publikováno v:
JHEP07(2024)227
It is difficult to construct a post-inflation QCD axion model that solves the axion quality problem (and hence the Strong CP problem) without introducing a cosmological disaster. In a post-inflation axion model, the axion field value is randomized du
Externí odkaz:
http://arxiv.org/abs/2312.07650
Standard axion electrodynamics has two closely related features. First, the coupling of a massless axion field to photons is quantized, in units proportional to the electric gauge coupling squared. Second, the equations of motion tell us that a time-
Externí odkaz:
http://arxiv.org/abs/2309.07951
Autor:
Reece, Matthew
The possible couplings of an axion to gauge fields depend on the global structure of the gauge group. If the Standard Model gauge group is minimal, or equivalently if fractionally charged color-singlet particles are forbidden, then the QCD axion's Ch
Externí odkaz:
http://arxiv.org/abs/2309.03939
Autor:
Reece, Matthew
These notes are an expanded version of lectures given at the 2022 TASI summer school in Boulder, Colorado. One goal of these lecture notes is to (partially) bridge the gap between what one learns in typical introductory quantum field theory classes a
Externí odkaz:
http://arxiv.org/abs/2304.08512
Publikováno v:
Phys. Rev. D 107 (2023) 11, 115012
It was recently shown that domain walls from the spontaneous breaking of CP symmetry are exactly stable, and must be inflated away to recover a viable cosmology. We investigate the phenomenological implications of this result in Nelson--Barr solution
Externí odkaz:
http://arxiv.org/abs/2212.03882
Autor:
McNamara, Jacob, Reece, Matthew
Parity and CP symmetries are broken in the world around us. Nonetheless, parity (or CP) may be a gauge symmetry which is higgsed in our universe. This is assumed in many scenarios for physics beyond the Standard Model, including the classic Nelson--B
Externí odkaz:
http://arxiv.org/abs/2212.00039