Constraining CP-violating electron-gluonic operators
Abstract We present an analysis of constraints on two types of CP-odd electron-gluonic operators (ēiγ 5 e)G μν a G aμν and e ¯ e G μ ν a G ∼ a μ ν $$ \left(\overline{e}e\right){G}_{\mu \nu}^a{\overset{\sim }{G}}^{a\mu \nu } $$ from current and future electric dipole moment (EDM) experiments. The rec...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
SpringerOpen
2019-07-01
|
Series: | Journal of High Energy Physics |
Subjects: | |
Online Access: | http://link.springer.com/article/10.1007/JHEP07(2019)074 |
id |
doaj-acd6982e1ed14e67be5df11e5d7cb6f2 |
---|---|
record_format |
Article |
spelling |
doaj-acd6982e1ed14e67be5df11e5d7cb6f22020-11-25T03:02:23ZengSpringerOpenJournal of High Energy Physics1029-84792019-07-012019712210.1007/JHEP07(2019)074Constraining CP-violating electron-gluonic operatorsKingman Cheung0Wai-Yee Keung1Ying-nan Mao2Chen Zhang3Physics Division, National Center for Theoretical SciencesDepartment of Physics, University of Illinois at ChicagoPhysics Division, National Center for Theoretical SciencesPhysics Division, National Center for Theoretical SciencesAbstract We present an analysis of constraints on two types of CP-odd electron-gluonic operators (ēiγ 5 e)G μν a G aμν and e ¯ e G μ ν a G ∼ a μ ν $$ \left(\overline{e}e\right){G}_{\mu \nu}^a{\overset{\sim }{G}}^{a\mu \nu } $$ from current and future electric dipole moment (EDM) experiments. The recent result from the ACME experiment using ThO molecules is used to derive an impressive lower bound on the effective scale for (ēiγ 5 e)G μν a G aμν at 8 TeV, assuming a QCD one-loop factor and no helicity suppression from new physics. One interesting aspect is that (ēiγ 5 e)G μν a G aμν contributes to the observable EDM in ThO experiment mainly through CP-odd electron-nucleon interaction rather than direct electron EDM which arises from three-loop running and matching. For e ¯ e G μ ν a G ∼ a μ ν $$ \left(\overline{e}e\right){G}_{\mu \nu}^a{\overset{\sim }{G}}^{a\mu \nu } $$ the current bound is much weaker and suffers from large uncertainties. We also discuss the QCD running and matching for the CP-odd electron-gluonic operators and give an estimate of the relevant nucleon matrix elements and uncertainties that are needed in the calculation.http://link.springer.com/article/10.1007/JHEP07(2019)074CP violationBeyond Standard ModelDiscrete SymmetriesEffective Field Theories |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Kingman Cheung Wai-Yee Keung Ying-nan Mao Chen Zhang |
spellingShingle |
Kingman Cheung Wai-Yee Keung Ying-nan Mao Chen Zhang Constraining CP-violating electron-gluonic operators Journal of High Energy Physics CP violation Beyond Standard Model Discrete Symmetries Effective Field Theories |
author_facet |
Kingman Cheung Wai-Yee Keung Ying-nan Mao Chen Zhang |
author_sort |
Kingman Cheung |
title |
Constraining CP-violating electron-gluonic operators |
title_short |
Constraining CP-violating electron-gluonic operators |
title_full |
Constraining CP-violating electron-gluonic operators |
title_fullStr |
Constraining CP-violating electron-gluonic operators |
title_full_unstemmed |
Constraining CP-violating electron-gluonic operators |
title_sort |
constraining cp-violating electron-gluonic operators |
publisher |
SpringerOpen |
series |
Journal of High Energy Physics |
issn |
1029-8479 |
publishDate |
2019-07-01 |
description |
Abstract We present an analysis of constraints on two types of CP-odd electron-gluonic operators (ēiγ 5 e)G μν a G aμν and e ¯ e G μ ν a G ∼ a μ ν $$ \left(\overline{e}e\right){G}_{\mu \nu}^a{\overset{\sim }{G}}^{a\mu \nu } $$ from current and future electric dipole moment (EDM) experiments. The recent result from the ACME experiment using ThO molecules is used to derive an impressive lower bound on the effective scale for (ēiγ 5 e)G μν a G aμν at 8 TeV, assuming a QCD one-loop factor and no helicity suppression from new physics. One interesting aspect is that (ēiγ 5 e)G μν a G aμν contributes to the observable EDM in ThO experiment mainly through CP-odd electron-nucleon interaction rather than direct electron EDM which arises from three-loop running and matching. For e ¯ e G μ ν a G ∼ a μ ν $$ \left(\overline{e}e\right){G}_{\mu \nu}^a{\overset{\sim }{G}}^{a\mu \nu } $$ the current bound is much weaker and suffers from large uncertainties. We also discuss the QCD running and matching for the CP-odd electron-gluonic operators and give an estimate of the relevant nucleon matrix elements and uncertainties that are needed in the calculation. |
topic |
CP violation Beyond Standard Model Discrete Symmetries Effective Field Theories |
url |
http://link.springer.com/article/10.1007/JHEP07(2019)074 |
work_keys_str_mv |
AT kingmancheung constrainingcpviolatingelectrongluonicoperators AT waiyeekeung constrainingcpviolatingelectrongluonicoperators AT yingnanmao constrainingcpviolatingelectrongluonicoperators AT chenzhang constrainingcpviolatingelectrongluonicoperators |
_version_ |
1724689866894082048 |