Resonant CP violation due to heavy neutrinos at the LHC

Simon Bray; Jae Sik Lee; Apostolos Pilaftsis

doi:10.1016/j.nuclphysb.2007.07.002

Resonant CP violation due to heavy neutrinos at the LHC

Simon Bray, Jae Sik Lee, Apostolos Pilaftsis

Research output: Contribution to journal › Article › peer-review

Abstract

The observed light neutrinos may be related to the existence of new heavy neutrinos in the spectrum of the SM. If a pair of heavy neutrinos has nearly degenerate masses, then CP violation from the interference between tree-level and self-energy graphs can be resonantly enhanced. We explore the possibility of observing CP asymmetries due to this mechanism at the LHC. We consider a pair of heavy neutrinos N1, 2 with masses ranging from 100 - 500 GeV and a mass-splitting Δ mN = mN2 - mN1 comparable to their widths ΓN1, 2. We find that for Δ mN ∼ ΓN1, 2, the resulting CP asymmetries can be very large or even maximal and therefore, could potentially be observed at the LHC. © 2007 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	95-118
Number of pages	23
Journal	NUCLEAR PHYSICS B
Volume	786
Issue number	1-2
DOIs	https://doi.org/10.1016/j.nuclphysb.2007.07.002
Publication status	Published - 10 Dec 2007

Keywords

Resonant CP violation, lepton flavour violation, lepton number violation, heavy neutrinos

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10.1016/j.nuclphysb.2007.07.002

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title = "Resonant CP violation due to heavy neutrinos at the LHC",

abstract = "The observed light neutrinos may be related to the existence of new heavy neutrinos in the spectrum of the SM. If a pair of heavy neutrinos has nearly degenerate masses, then CP violation from the interference between tree-level and self-energy graphs can be resonantly enhanced. We explore the possibility of observing CP asymmetries due to this mechanism at the LHC. We consider a pair of heavy neutrinos N1, 2 with masses ranging from 100 - 500 GeV and a mass-splitting Δ mN = mN2 - mN1 comparable to their widths ΓN1, 2. We find that for Δ mN ∼ ΓN1, 2, the resulting CP asymmetries can be very large or even maximal and therefore, could potentially be observed at the LHC. {\textcopyright} 2007 Elsevier B.V. All rights reserved.",

keywords = "Resonant CP violation, lepton flavour violation, lepton number violation, heavy neutrinos",

author = "Simon Bray and Lee, \{Jae Sik\} and Apostolos Pilaftsis",

year = "2007",

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T1 - Resonant CP violation due to heavy neutrinos at the LHC

AU - Bray, Simon

AU - Lee, Jae Sik

AU - Pilaftsis, Apostolos

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N2 - The observed light neutrinos may be related to the existence of new heavy neutrinos in the spectrum of the SM. If a pair of heavy neutrinos has nearly degenerate masses, then CP violation from the interference between tree-level and self-energy graphs can be resonantly enhanced. We explore the possibility of observing CP asymmetries due to this mechanism at the LHC. We consider a pair of heavy neutrinos N1, 2 with masses ranging from 100 - 500 GeV and a mass-splitting Δ mN = mN2 - mN1 comparable to their widths ΓN1, 2. We find that for Δ mN ∼ ΓN1, 2, the resulting CP asymmetries can be very large or even maximal and therefore, could potentially be observed at the LHC. © 2007 Elsevier B.V. All rights reserved.

AB - The observed light neutrinos may be related to the existence of new heavy neutrinos in the spectrum of the SM. If a pair of heavy neutrinos has nearly degenerate masses, then CP violation from the interference between tree-level and self-energy graphs can be resonantly enhanced. We explore the possibility of observing CP asymmetries due to this mechanism at the LHC. We consider a pair of heavy neutrinos N1, 2 with masses ranging from 100 - 500 GeV and a mass-splitting Δ mN = mN2 - mN1 comparable to their widths ΓN1, 2. We find that for Δ mN ∼ ΓN1, 2, the resulting CP asymmetries can be very large or even maximal and therefore, could potentially be observed at the LHC. © 2007 Elsevier B.V. All rights reserved.

KW - Resonant CP violation, lepton flavour violation, lepton number violation, heavy neutrinos

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DO - 10.1016/j.nuclphysb.2007.07.002

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EP - 118

JO - NUCLEAR PHYSICS B

JF - NUCLEAR PHYSICS B

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Resonant CP violation due to heavy neutrinos at the LHC

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Keywords

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