Baryon washout, electroweak phase transition, and perturbation theory
By Hiren H. Patel, M. Ramsey-Musolf. 2011
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We analyze the conventional perturbative treatment of sphaleron-induced baryon number washout relevant for electroweak baryogenesis and show that it is not gauge-independent due to the failure of consistently implementing the Nielsen identities order-byorder in perturbation theory. We provide a gauge-independent criterion for baryon number preservation in place of the conventional (gauge-dependent) criterion needed for successful electroweak baryogenesis. We also review the arguments leading to the preservation criterion and analyze several sources of theoretical uncertainties in obtaining a numerical bound. In various beyond the standard model scenarios, a realistic perturbative treatment will likely require knowledge of the complete two-loop finite temperature effective potential and the one-loop sphaleron rate.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/ca7e7bc74478a6fe02ea020841d8df47ae8e0379
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In Nuclear and High Energy Physics
Citations in the corpus
- Theoretical uncertainties for cosmological first-order phase transitions (2020, methodology): “18 – dimensional reduction of the SMEFT: choosing a general covariant gauge, the ξi-dependencies cancel duly in the matching relations up to O(g4) (and higher order terms can be discarded). Reference [76] – in order to maintain gauge invariance – proposed an alternative resummation approach. In this”
- Complex scalar singlet dark matter: Vacuum stability and phenomenology (2012, background): “It was shown in [51] that the value of the effective potential at its extrema can be calculated in a gauge-invariant way through a consistent expansion in ~, provided that the extrema have classical (tree level) analogs.”
- Quantum transport and electroweak baryogenesis (2013, background): “on, the tunnel probability per volume and time is suppressed by the Euclidean action of the so-called tunneling bounce φ¯ P∼Ae−S(φ¯) , (129) 10For a more detailed discussion of this argument see also [129, 130]. B SEMI-CLASSICALAPPROACHTOPHASETRANSITIONS 64 V(φ) φ b φ s φ d Figure 12: Example for a ”
- Testing electroweak baryogenesis with future colliders (2014, background): “onsistent perturbative expansion for the quantities v c and T c separately, but the numerical impact of using the fully gauge invariant criterion is much smaller than the effect of 2-loop corrections [45]. – 8 – generation mechanism. However, the exact choice of the minimum v c=T cdoes not qualitati”