Electroweak Baryogenesis and Colored Scalars

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We consider the 2-loop finite temperature effective potential for a Standard Model-like Higgs boson, allowing Higgs boson couplings to additional scalars. If the scalars transform under color, they contribute 2-loop diagrams to the effective potential that include gluons. These 2-loop effects are perhaps stronger than previously appreciated. For a Higgs boson mass of 115 GeV, they can increase the strength of the phase transition by as much as a factor of 3.5. It is this effect that is responsible for the survival of the tenuous electroweak baryogenesis window of the Minimal Supersymmetric Standard Model. We further illuminate the importance of ... continued below

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11 pages

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Cohen, Timothy; /SLAC /Michigan U., MCTP; Pierce, Aaron & /Michigan U., MCTP February 15, 2012.

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We consider the 2-loop finite temperature effective potential for a Standard Model-like Higgs boson, allowing Higgs boson couplings to additional scalars. If the scalars transform under color, they contribute 2-loop diagrams to the effective potential that include gluons. These 2-loop effects are perhaps stronger than previously appreciated. For a Higgs boson mass of 115 GeV, they can increase the strength of the phase transition by as much as a factor of 3.5. It is this effect that is responsible for the survival of the tenuous electroweak baryogenesis window of the Minimal Supersymmetric Standard Model. We further illuminate the importance of these 2-loop diagrams by contrasting models with colored scalars to models with singlet scalars. We conclude that baryogenesis favors models with light colored scalars. This motivates searches for pair-produced di-jet resonances or jet(s) + = E{sub T}.

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11 pages

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  • Journal Name: Phys.Rev.D85:033006,2012

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  • Report No.: SLAC-PUB-14621
  • Grant Number: AC02-76SF00515
  • DOI: 10.2172/1035098 | External Link
  • Office of Scientific & Technical Information Report Number: 1035098
  • Archival Resource Key: ark:/67531/metadc835039

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  • February 15, 2012

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  • May 19, 2016, 3:16 p.m.

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  • Nov. 23, 2016, 6:05 p.m.

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Cohen, Timothy; /SLAC /Michigan U., MCTP; Pierce, Aaron & /Michigan U., MCTP. Electroweak Baryogenesis and Colored Scalars, article, February 15, 2012; United States. (digital.library.unt.edu/ark:/67531/metadc835039/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.